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  • Articles  (1,423)
  • Potassium
  • Zinc
  • nitrogen
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  • 1
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    Macro and micro nutrients of tropical seagrasses, Halophila ovalis, H. spinulosa and Halodule uninervis in Johore, Malaysia (2018)
    Details
    Publication Date: 2021-05-19
    Description: The present study determined and compared contents of macro- (Nitrogen-N, Phosphorus-P, Potassium-K, Calcium-Ca, Magnesium-Mg) and micro- (Zinc-Zn, Iron-Fe, Manganese-Mn, Cupper-Cu) nutrients in four seagrass species big-leaved (BL) Halophila ovalis (R. Br.) Hook. f., small-leaved (SL) H. ovalis (R. Br.) Ascherson, H. spinulosa (R. Br.) Aschers. in Neumayer and Halodule uninervis (Forssk.) Aschers from three locations Merambong shoal, Seluyong shoal-1 and Seluyong shoal-2, Johore, Malaysia on March 2013. Dried seagrass samples were subjected to wet digestion method and concentration determined using a Perkin Elmer 5100 PC atomic absorption spectrophotometer. Macro and micro-nutrients varied with species and locations. Observed macro-nutrient contents were high for N (17320 mg kg-1) in big-leaved (BL) H. ovalis from Seluyong shoal-2, P (2921.33 mg kg-1) in big-leaved (BL) H. ovalis from Seluyong shoal-1, and for K (10942.67 mg kg-1) in H. uninervis from Merambong shoal and for Ca (10576 mg kg-1) in small-leaved (SL) H. ovalis from Merambong shoal. Mg (3534.67 mg kg-1) was comparatively higher in H. spinulosa from Merambong shoal. Micro-nutrients such as Zn ranged from 138.67 mg kg-1 to 212 mg kg-1 and Cu from 13.33 mg kg-1 to17.33 mg kg-1 with no discernible differences between species. Fe concentration was consistently higher in all species. Hierarchically macro and micro-nutrients contents did not show a consistent ordered pattern according to species and location. Based on biplots generated by Principle component analysis (PCA), there were clear separation of seagrass species based on the micro- and macro-nutrient contents with locations from Malaysia and other regions.
    Description: Published
    Keywords: Biotechnology ; Halodule sp ; Halophila sp ; Macro-nutrient ; Micro-nutrient ; PCA ; Nitrogen ; Phosphorus ; Potassium ; Calcium ; Magnesium ; Zinc ; Iron ; Manganese ; Cupper
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.246-261
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  • 2
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    Investigation of mercury concentration and its interaction with zinc and selenium at the muscle and liver tissues of Whitecheek Shark (Carcharhinus dussumieri) from Persian Gulf (2017)
    Details
    Publication Date: 2021-05-19
    Description: Mercury, zinc and selenium concentrations were analyzed in the muscle and liver of 25 Whitecheek Shark (Carcharhinus dussumieri) from the coast of Bandar Abbas. The level of Hg accumulation and its interaction with Zn and Se in Whitecheek Shark were studied. Hg, Zn and Se concentrations were determined by an Advanced Mercury Analyzer (LECO, AMA 254), Atomic Absorption Spectrometer (ASS,PU 9400) and Graphite Furnace Atomic Absorption Spectrophotometry (Perkin Elmer 3030) respectively. The mean (±SD) of Hg, Zn and Se concentrations were 0.05±0.02, 0.92±0.25 and 0.13±0.05µg/g wet wt in the muscle and 1.07±0.86, 1.57±0.43 and 0.46±0.19µg/g wet wt in the liver tissues, respectively. The mean of Hg, Zn and Se in liver tissue was significantly higher than muscle tissue. Also, 64% of liver samples showed levels above the acceptable limit established by WHO and FAO. A positive correlation was found between Hg and Se concentrations in the muscle and liver tissues with weight and length variables were statistically significant. In this study, the accumulation of Se in the muscle and liver of Whitecheek shark showed a positive correlation with Hg concentration. The mean molar ratio of Se to Hg found in the muscle and liver were 6.36±1.77 and 2.74±3.61, respectively. Positive correlations between Hg and Se showed efficient detoxifying mechanism and as a result, the possibility of reduction in toxicity of mercury in both tissues via Se-Hg complexes or the binding of Hg with selenoproteins.
    Description: Published
    Keywords: Mercury ; Carcharhinus dussumieri ; Shark ; Whitecheek Shark ; Investigation ; Concentrations ; Interactions ; Zinc ; Selenium ; Muscle ; Liver ; Tissues
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.11-22
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  • 3
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    Quantitive characteristics and chemical composition in Caspian Roach (Rutilus rutilus caspicus) sperm (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study, quantitive characteristics and chemical composition of in roach (Rutilus rutilus caspicus) sperm were investigated. Sperm traits included sperm movement duration, percentage of motile spermatozoa, sperm density, spermatocrit and sperm volume. Some seminal plasma characteristics (sodium, potassium, calcium, magnesium and chloride) were investigated. In addition, some metabolites of seminal plasma (glucose, cholesterol and protein) were measured. The Na+ and K+ ions correlated negatively with spermatozoa motility (r = -0.0518, p〈.05 and r =-0.3597, p〈.01) respectively. Also, there were significant positive correlations between Ca2+ and Cl- ions with spermatozoa motility (r = 0.2945, p〈.05 and r= 0.1379, p〈.01), respectively. Mg+2 was positively correlated with glucose and protein (r = 0.046, p〈.05 and r = 0.694, p〈.05), respectively. On the other hand, a significant positive relationship was found between Na+ and K+ (r = 0.548, p〈.01). These parameters can be used to evaluation of sperm quality and collecting information about developing procedures for artificial fertilization of roach.
    Description: Published
    Keywords: Biology ; Physiology ; Rutilus rutilus caspicus ; Sperm motility ; Seminal plasma ; Sperm quality ; Roach ; Spermatozoa ; Potassium ; Sodium ; Calcium ; Magnesium ; Chloride ; Plasma ; Blood
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.81-90
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  • 4
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    Sublethal impacts of heavy metals on antioxidant enzymes and biochemical parameters in rohu (Labeo rohita) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The present research was designed to study and compare the biochemical parameters in Labeo rohita due to exceptional nutritional value of this fish as a protein source in developing countries. The protein and heavy metal (Zn, Cu, Ni) activities were determined spectrophotometrically. The proximate analysis of L. rohita collected from different localities of Pakistan revealed that the protein (19.97%) and ash contents (1.76%) were highest in hatchery L. rohita while the fat (0.84%), carbohydrate (5.39%) and dry matter contents (24.11%), were maximum in the river L. rohita. In comparison to the hatchery and river L. rohita, the moisture contents (81.42%) were the highest in farmed fish. During enzymatic analysis, maximum activities of the peroxidase, α- amylase and mutarotase were recorded in hatchery fish whereas the catalase and superoxide dismutase activities were found to be the highest in farmed fish. The maximum accumulation of Cu and Ni metals were observed in hatchery fish and least in farmed fish and the highest Zn accumulation was observed in river fish. Analysis of variance on catalase, peroxidase, α-amylase activity and metal accumulation showed statistically significant differences at p〈0.05 among sampling sites and fish organs and interaction between sampling sites and fish organs.
    Description: Published
    Keywords: Aquaculture ; Enzymes ; Proximate analysis ; Antioxidant enzymes ; Metals ; Labeo rohita ; Biochemical ; Parameters ; Heavy metals ; Zinc ; Cupper ; Nickel
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.668-683
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  • 5
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    Short communication:Study on bioaccumulation of heavy metals (cadmium, nickel, zinc and lead) in the muscle of wels catfish (Silurus glanis) in the Anzali Wetland (2018)
    Details
    Publication Date: 2021-05-19
    Description: After entering aquatic ecosystems, heavy metals accumulate in the organs and tissues of aquatics including fish and finally enter the food chain. These heavy metals can enter the human body through eating contaminated fish. Absorbance values and accumulation of heavy metals in aquatics especially the fish depend on ecological conditions, physical, chemical and biological factors of water, the element type, and the physiological state of the aquatic (Oryan et al., 2010). Among aquatic ecosystems, wetlands and rivers are considerably important from the point of ecology. Rivers act as carriers of nutrients and non–nutrients and wetlands act as sinks for these substances. Now this effect will be more apparent if the wetland is an intermediary between a river and a static ecosystem. The Anzali Wetland is the type of ecosystem that embraces water from 11 rivers from one side and passes water into the Caspian Sea through a second outlet on the other side. The rivers passing through urban and rural areas and forests carry different types of organic matter, minerals, sediment, and industrial sewage (Taheri, 2013). The Anzali Wetland is one of the valuable wetlands registered in the Ramsar International Convention the contamination of which has become the main challenge for the people and officials during the past two decades (Khosravi, 2011).
    Description: Published
    Keywords: Wels catfish ; Heavy metals ; Muscle edible tissue ; Wetland ; Silurus glanis ; Cadmium ; Nickel ; Zinc ; Lead
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.244-250
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  • 6
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    Short communication: Study on bioaccumulation of heavy metals (cadmium, nickel, zinc and lead) in the muscle of wels catfish (Silurus glanis) in the Anzali Wetland (2018)
    Details
    Publication Date: 2021-05-19
    Description: After entering aquatic ecosystems, heavy metals accumulate in the organs and tissues of aquatics including fish and finally enter the food chain. These heavy metals can enter the human body through eating contaminated fish. Absorbance values and accumulation of heavy metals in aquatics especially the fish depend on ecological conditions, physical, chemical and biological factors of water, the element type, and the physiological state of the aquatic (Oryan et al., 2010). Among aquatic ecosystems, wetlands and rivers are considerably important from the point of ecology. Rivers act as carriers of nutrients and non–nutrients and wetlands act as sinks for these substances. Now this effect will be more apparent if the wetland is an intermediary between a river and a static ecosystem. The Anzali Wetland is the type of ecosystem that embraces water from 11 rivers from one side and passes water into the Caspian Sea through a second outlet on the other side. The rivers passing through urban and rural areas and forests carry different types of organic matter, minerals, sediment, and industrial sewage (Taheri, 2013).
    Description: Published
    Keywords: Silurus glanis ; Wels catfish ; Heavy metals ; Muscle edible tissue ; Wetland ; Cadmium ; Nickel ; Zinc ; Lead
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.244-250
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  • 7
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    Buzzards Bay Water Quality Data from the Buzzards Bay Coalition’s Baywatchers Program 1992-2018 (2020)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2020-08-28
    Description: The Buzzards Bay Coalition’s Baywatchers Monitoring Program collected summertime water quality information at more than 150 stations around Buzzards Bay, Massachusetts from 1992 to 2018. Baywatchers monitoring data document nutrient-related water quality and the effects of nitrogen pollution. The large majority of stations are located in sub-estuaries of the main Bay, although stations in central Buzzards Bay and Vineyard Sound were added beginning in 2007. Measurements include temperature, salinity, Secchi depth and concentrations of dissolved oxygen, ammonium, nitrate + nitrite, total dissolved nitrogen, particulate organic nitrogen, particulate organic carbon, ortho-phosphate, chlorophyll a, pheophytin a, and in lower salinity waters, total phosphorus and dissolved organic carbon. The Baywatchers dataset provides a long-term record of the water quality of Buzzards Bay and its sub-estuaries. The data have been used to identify impaired waters, evaluate discharge permits, support the development of nitrogen total maximum daily loads, develop strategies for reducing nitrogen inputs, and increase public awareness and generate support for management actions to control nutrient pollution and improve water quality.
    Description: The Buzzards Bay Baywatchers water quality monitoring program was established in 1992 by the Buzzards Bay National Estuary Program (NEP), in partnership with the Buzzards Bay Coalition, under US EPA Cooperative Agreement CE001510 with the Commonwealth of Massachusetts. The monitoring program was exclusively funded by the Buzzards Bay NEP under various EPA Cooperative Agreement grants from 1992 - 1996, then subsequently managed and funded by the Buzzards Bay Coalition primarily through contributions from the organization’s members and private foundations, grants from the Commonwealth of Massachusetts, and through continued reduced support from the Buzzards Bay NEP through EPA grants. The Coalition's oxygen and nutrient databases were combined into a structured reference database table by Costa in 2014 under a task contained in EPA Cooperative Agreement (CE96144201).
    Keywords: water quality ; Buzzards Bay ; nitrogen ; eutrophication ; coastal ; citizen science
    Repository Name: Woods Hole Open Access Server
    Type: Dataset
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  • 8
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    The effect of heavy metal on Cltlorella vulgaris, Scenedesmus obliquus and Anabaena Flos-aquae (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this survey two species of chlorophyta (Chlorella vulgaris and Scenedesmus obliquus ) and one species of blue-green algae (Anabaena flos- aquae) were exposed with heavy metal (zinc) under lab condition ( temp. 25± 2°C,light 3500± 350 lux) for 96 hours. After this time, these species were counted with hemocytometer and based on probit analysis method and was determined ECIO, EC50 and EC90. Amount of EC50 for C vulgaris, S. obliquus and A.flosaquae were 0.134,0.047 and 0.093 mg/lit, respectively and this subject was distincted that S obliquus has more endurance than other species. Mac value of zinc for these species (C. vulgaris, S. obiquus and A.flos-aquae ) were 0.0134, 0.0047 and 0.0093 mg/l respectively. Regression coefficient was 92-98 percent between concentration logaritm of zinc and decrease of these species density.
    Description: Published
    Keywords: Zinc ; Ec ; Scenedesmus Obliquus ; Chlorella vulgaris ; Anabaena Fios-Aquae ; Blue-green algae ; Heavy metals ; Species ; C.vulgaris ; S.obiquus ; A.flos-aquae
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.83-90
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  • 9
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    Assessing Pb, Ni and Zn accumulation in the tissues of Liza aurata in the south Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The liver, kidney, gill, ovary and muscle tissues of the caught Liza aurata have been sampled in spring 2002 in the southern Caspian Sea to assess their contamination with Pb, Ni and Zn by using atomic absorption spectrophotometer method. We found the highest concentration of lead in the liver tissue (17.51 mg/kg), followed by gill (13.95 mg/kg), kidney (5.03 mg/kg) and ovary (4.91 mg/kg). The lowest concentration of lead was detected in muscle tissue (3.01 mg/kg) of Liza aurata. The highest accumulation of Ni and Zn were detected in ovary followed by liver, gill and kidney of the fish with a concentration of 6.23, 6.14, 5.71, and 2.98 mg/kg for nickel and 647.28, 159.85, 75.71 and 65.42 mg/kg for zinc. We observed the lowest concentration of nickel (2.49 mg/kg) and zinc (20.14 mg/kg) in the muscle tissue and also determined the highest contamination of the fish with these chemicals to be occurring in the southwest followed by south center and southeast Caspian Sea.
    Description: Published
    Keywords: Brackish ; Tissues ; Kidney ; Nickel ; Zinc
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.65-78
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  • 10
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    Effects of different methods of cooking on mineral and vitamin (A and E) content of yellow fin sea bream (Acanthopagrus latus) fish fillets (2018)
    Details
    Publication Date: 2021-05-19
    Description: The aim of this study was to evaluate the effect of cooking on the content of minerals and vitamins yellow fin seabream fillets on the baking process. In this study fillets of yellow fin seabream (Acanthopagrus latus) with three methods include steaming, frying and grilling the (grill a) the amount of vitamins (a and E) and minerals (iron, phosphorus, copper, zinc, calcium, magnesium, potassium, sodium) was conducted with a sample of crude compared Grdyd.bray measured amounts of vitamin and mineral content Vitamins high performance liquid chromatography (HPLC) method for measuring atomic absorption spectrophotometry was used minerals. The comparison of all the minerals in samples cooked with raw samples, showed no significant changes (p˂0 /05).The content of vitamin A in the cooked samples, compared to the raw samples decreased significantly (p˂0 /05).the lowest amount of vitamin A were observed in fried samples (66/0 ± 6/7 mg/100gr wet weight ) (p˂0 /05). The content of vitamin E in all cooked samples, compared to the raw samples decreased significantly (p˂0 /05)and the lowest levels of vitamin E was observed in grilled samples (02/0 ± 293/0 mg/100gr wet weight). The results showed that three cooking methods including steamin and grilling and frying caused a insignificant change in mineral content but effect of these three methods of cooking on the content of vitamin a and E in fish fillets yellowfin seabream (Acanthopagrus latus) was different.
    Description: Published
    Keywords: Acanthopagrus latus ; Yellowfin Seabream ; Acanthopagrus latus ; Methods of cooking fish ; Minerals ; Vitamin A ; Vitamin E ; Phosphorus ; Potassium ; Magnesium ; Calcium ; Zinc ; Copper
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.79-88
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  • 11
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    The study and measurement of some metals (lead, nickel, zinc, copper and iron) in muscle tissue shrimp (Metapenaeus affinis) in Hormozgan Province (2018)
    Details
    Publication Date: 2021-05-19
    Description: The objective of this study is to evaluate and compare the concentration of metals, lead, nickel, iron and copper in muscle tissue of White shrimp (Metapenaeus affinis) in three regions (Qeshm, Khamir port and Laft port) in Hormozgan Province. Sampling was conducted in summer and winter 1394. After the 180- captured biometric samples, muscle tissue was isolated. The preparation and analysis of samples was performed according to standard methods MOOPAM. The results indicated that the studied concentration in muscle tissue of White shrimp at sample locations showed significant difference statistically. In terms of concentration in the muscle tissue of White shrimp in the study area between summer and winter significant difference was observed, statistically (p〈0/05). As both in summer and winter concentrations of lead, nickel, iron and copper in muscle tissue of White shrimp in Qeshm is greater than the other two regions. The studied concentration in muscle tissue of White shrimp in Qeshm, Khamir port and Laft port international standards is less than the limit which indicates that the health of aquatic ecosystems contamination is not a problem.
    Description: Published
    Keywords: Metapenaeus affinis ; White shrimp ; Metalic elements ; Food chain ; Metals ; Lead ; Nickel ; Zinc ; Copper ; Iron ; Muscle ; Tissues
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.179-189
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  • 12
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    Possibility of trout farms efluent return to groundwater In non-agricultural seasons (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This project is trying to investigate water contamination after use in ponds. For this aquaculture status, physical and chemical water properties, microbial pollutants and heavy metals levels in the some of trout ponds effluent in East Azerbaijan province were evaluated in 2007 to 2009. The information of groundwater and climate conditions in ten years, Drilling and wells piezometric Information, in local wells are reviewed.According to data obtained from analysis of water samples in the output pools range studied concentrations(term mg/l) some parameters are as follows:(BOD: 1.9-3.2),(COD: 3.4-34.1),(TSS: 26.6-42.7),(N-NO2:0.003-.136),(P-Po4:0.0170.067),(pH:7.75-8.28).Electrical conductivity(500 ±2 to 1129±144 term µm/cm) in the effluent ponds . Based on the results of we can say that between input and effluent ponds in the review of all factors as chlorine, sulfate, sodium, potassium, total nitrogen, soluble phosphorus, total phosphorus, calcium, total hardness, magnesium, alkalinity and silica significant changes not be observed. Review of water analysis data to some factors(such as:water temperature,EC,pH,NO2,CO2,HCO3,CO3,DO,COD,BOD) And compare this data with the authorities standard confirmed that the All factors mentioned in effluent is allowed now. In terms of microbial contamination and heavy metals ( Zn,Cu,Ca,Pb,Fe,Cr ) is no pollution. Appropriate strategies for removing suspended materials must to use.We can use Watershed Management solutions to inject output water to the underground table. Should be noted status change (eg change in flow rate, an unusual increase in temperature, fish density increasing, reducing food quality, lack of appropriate management actions and ...) may reduce the effluent quality and the ability of injection water underground to lose . In this case, measures must be for wastewater treatment and improve the quality ponder.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Microbial ; Effluent Trout ; Return ; Ground Water ; Non-agricultural ; Aquaculture ; Pollutants ; Heavy metals ; Samples ; Chlorine ; Sulfate ; Sodium ; Potassium
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 88pp.
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  • 13
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    Measurement of some heavy metals concentration in live feed commonly used in aquaculture (2018)
    Details
    Publication Date: 2021-05-19
    Description: The aim of the current investigation was to determine the concentration of some heavy metals in a number of aquatic invertebraes commnly used as live feed in aquaculture. For this goal, samples of blood worm, sludge worm, earthworm, gammarus, shelled snail, freshwater ghost shrimp and tiny marine shrimp were prepared from aquatic environment or from imported live feeds. Samples were digested chemically and the atomic absorption were recorded as µg/g dry weight. Results showed that the highest level of heavy metals concentration were detected in live feeds as follows: iron (213.4±10.2), cadmium (1.15±0.013) and nickel (20.97±3.6) in earthworm; zinc (105.71±5.8), chrome (19.63±5.3) in sludge worm; copper (37.34±4.2) in freshwater ghost shrimp and lead (24.71±4.7) in tiny marine shrimp respectively. It is proposed that high rates of heavy metals detected in some of live feeds in the present study may eventually have a severe negative impact on fish and human health conditions. Therefore, it is suggested that upper limit concentration of these elements be defined as an import health standard for every permission of importation of live feeds.
    Description: Published
    Keywords: Blood worm ; Sludge worm ; Earth worm ; Heavy metals ; Aquatic invertebrates ; Live feed ; Aquaculture ; Measurement ; Freshwater ; Iron ; Cadmium ; Nickel ; Zinc ; Zinc ; Copper ; Lead
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.7-13
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  • 14
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    Effects of Zinc and Copper exposure on growth and survival of Artemia urmiana and Artemia franciscana (2018)
    Details
    Publication Date: 2021-05-19
    Description: The effects of exposure to Zinc and Copper in developing from nauplius to adult stages in two species, Artemia urmiana and A. franciscana were studied. The growth and lifespan of the specimens under treatments also have been investigated. During the period of the experiments, both species of Artemia were exposed by Zinc-treated groups (23, 68, 114 mg/l) and also copper-treated groups (13, 25, 38 mg/l) and compared with control group without any metal treatment. However, in treatments with Zinc and Copper concentrations, lifespan was reduced in comparison with that of the control treatments. Results showed that Zinc and Copper have toxic effects on A. urmiana and A. franciscana. Although the resistance of both of them was high, but A. urmiana was more endure than A. franciscana. It is suggested that the two Artemia species might have adopted a strategy to speed up growth and reproduce before metal pollution can cause death for them. Also, this study indicated that Zinc was less toxic than Copper for the two species investigated.
    Description: Published
    Keywords: Artemia franciscana ; Artemia urmiana ; Growth ; Zinc ; Survival ; Reproduction ; Toxicity ; Copper ; Toxicity tolerance ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.123-132
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  • 15
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    The correlation of length and weight of Kutum (Rutilus frisii kutum) in the central south of Caspian Sea with copper and zinc concentration in muscle and liver tissues (2018)
    Details
    Publication Date: 2021-05-19
    Description: Concentration of copper (Cu) and zinc (Zn) in liver and muscle tissues of Kutum (Rutilus frisii kutum) of the Caspian Sea was assessed to study possible correlation of length and weight and the bioaccumulation of these heavy metals in the fish. Concentration of the metals in liver was higher than muscle (Zn: 55.2, Cu: 41.5kg/g) while the concentrations in the muscle tissue were lower than permissible limits proposed by FAO. Significant correlations were not detected between mean Zn and cu concentration and fish size. Finally, no significant difference was found in the concentration of the heavy metals in male and female fish specimens (P〉0.05).
    Description: Published
    Keywords: Correlation analysis ; Rutilus frisii ; Brackish ; Length-weight relationships ; Bioaccumulation ; Fish physiology ; Heavy metals ; Zinc ; Muscles ; Liver ; Copper ; Freshwater fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.121-128
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  • 16
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    The history of contamination in sediments from the Mersey Estuary. Development of a chronology for the contamination of the Mersey Estuary by heavy metals and organochlorines (2021)
    Environment Agency North West | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11003 | 1256 | 2013-03-26 13:45:42 | 11003 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-26
    Description: This is the history of contamination in sediments from the Mersey Estuary: Development of a chronology for the contamination of the Mersey Estuary by heavy metals and organochlorines Report produced by the Environment Agency in 1998. This report looks at the history of industrial contamination of the Mersey and Ribble Estuaries back to the early part of the last century, many decades before the start of monitoring programmes providing a remarkably detailed picture of very complex changes. There is a clear record in the sediment of the contamination by each heavy metal (including: Cu, Cr, Hg, Pb, Zn) and organochlorine chemical (including DDT isomers and PCB congeners) studied. The results of the study clearly show the increases in levels of contamination as industry expanded early last century followed by various improvements as this century progressed. Each pollutant has its own idiosyncratic pattern of change with some improvements predating modern environmental concerns whilst other changes seem to relate directly to recent improvements in legislative control. Overall, for the pollutants studied, the results clearly demonstrate the magnitude of improvement that has been achieved in what was a very polluted area. The only major reservation to this story is that despite the wide range of substances covered, many other potentially important pollutants remain to be studied in a similar manner.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Mersey ; Ribble ; Inland waters ; Rivers ; Estuaries ; Heavy metals ; Lead ; Arsenic ; Chromium ; Copper ; Mercury ; Zinc ; Organochlorines ; HCB ; PCBs ; DDT ; Environmental Assessment ; Freshwater pollution ; Water quality
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 104
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  • 17
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    The influence of nitrogen and phosphorus on the growth of a diatom Skeletonema costatum (Greville) Cleve (2021)
    In:  http://aquaticcommons.org/id/eprint/16382 | 12051 | 2015-03-27 10:07:19 | 16382 | Bangladesh Fisheries Research Institute
    Details
    Publication Date: 2021-07-04
    Description: Nitrogen and phosphorus requirements of a chain-forming diatom, Skeletonema costatum (Greville) Cleve, collected from Yatsushiro Sea, Japan, were investigated in a laboratory culture experiment. Sodium nitrate and sodium glycerophosphate were used as nitrogen and phosphorus sources, respectively. Cultures were grown in modified Provasoli's ASP2NTA medium (Provasoli et al. 1957) at 25±1°C, light intensity 60 µE mˉ² secˉ¹ and photoperiod 12:12-h, L:D cycle. Optimum growth was observed at nitrate concentrations of 3-10 mglˉ¹ and phosphate concentrations of 1.5-15 mglˉ¹. Adequate growth was also found at the nitrate concentration of up to as high as 300 mglˉ¹. Significantly poorer growth was found at lower nitrate (〈3.0 mglˉ¹) and higher phosphate (〉15 mglˉ¹) concentrations. From the present study, it is concluded that S. costatum can grow well at wide ranges of nitrate concentrations but is sensitive to higher phosphate concentrations.
    Keywords: Aquaculture ; marine algae ; diatom ; Skeletonema costatum ; nitrogen ; phosphorus ; growth rate
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    Type: article
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    Metallothionein as an indicator of water quality: assessment of the bioavailability of cadmium, copper, mercury and zinc in aquatic animals at the cellular level (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5313 | 1256 | 2011-09-29 15:06:23 | 5313 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: The study of metallothioneins (MTs) has greatly improved our understanding of body burdens, metal storage and detoxification in aquatic organisms subjected to contamination by the toxic heavy metals, Cd, Cu, Hg and Zn. These studies have shown that in certain organisms MT status can be used to assess impact of these metals at the cellular level and, whilst validation is currently limited to a few examples, this stress response may be linked to higher levels of organisation, thus indicating its potential for environmental quality assessment. Molluscs, such as Mytilus spp., and several commonly occurring teleost species, are the most promising of the indicator species tested. Natural variability of MT levels caused by the organism's size, condition, age, position in the sexual cycle, temperature and various stressors, can lead to difficulties in interpretation of field data as a definitive response-indicator of metal contamination unless a critical appraisal of these variables is available. From laboratory and field studies these data are almost complete for teleost fish. Whilst for molluscs much of this information is lacking, when suitable controls are utilised and MT measurements are combined with observations of metal partitioning, current studies indicate that they are nevertheless a powerful tool in the interpretation of impact, and may prove useful in water quality assessment.
    Keywords: Environment ; Oceanography ; Pollution ; Water quality ; Cadmium ; Copper ; Mercury ; Zinc ; Aquatic animals ; Cytology ; Metallothioneins ; Environmental monitoring ; Indicators ; Scotland
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    Type: book_section , FALSE
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    Advantages of liquid nitrogen freezing of Penaeus monodon over conventional plate freezing (2021)
    In:  http://aquaticcommons.org/id/eprint/18622 | 12051 | 2015-11-05 21:37:56 | 18622 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-10
    Description: Liquid nitrogen frozen products are biochemically and organoleptically superior to conventional plate frozen products but beneficial effect of liquid nitrogen freezing over conventional plate freezing can exist only up to 59 days at a commercial storage temperature of -18°C.
    Keywords: Fisheries ; storage life ; freezing storage ; nitrogen ; Penaeus monodon
    Repository Name: AquaDocs
    Type: article
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    Estimation of Nutrient Load from Aquaculture Farms in Manila Bay, Philippines (2021)
    In:  ulyssesmontojo@gmail.com | http://aquaticcommons.org/id/eprint/27090 | 25026 | 2020-08-21 04:28:09 | 27090 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: Waste from aquaculture is considered as one of the possible causes of water quality deterioration in Manila Bay. Aquaculture in the area accounts for almost 30% of the total production in the Philippines. This high production entails intensified application of inputs that could possibly contribute to the nutrient (nitrogen, N and phosphorus, P) load in the bay. Thus, estimation of the N, P and SO4 loaded from aquaculture farms is necessary to develop more responsive intervention to reduce nutrient load in Manila Bay. Water samples were collected throughout the rearing period from different aquaculture systems in Cavite, Bulacan, Pampanga, and Bataan. The annual estimated N and P loaded from aquaculture farms were 12, 696.66 MT and 2, 363.01 MT, respectively. Fish pens/cages recorded the highest contribution accounting for 88% N and 86% P of the total load. It can be attributed to the direct release of uneaten feeds into the bodies of water. Roughly, 12% N and 14% P were obtained from the fishponds. Furthermore, the annual SO4 loaded from fishponds was estimated at 36,917.54 MT. Results of the study suggested that there should be an extensive monitoring of the environmental impacts and annual load of aquaculture farms for the sustainable regulations and management of aquaculture activities to reduce nutrient load and improve the aquaculture production as well. Finally, strict compliance to the regulatory guidelines and ordinances must be imposed to achieve the effluent quality standards.
    Description: Bureau of Fisheries and Aquatic Resources
    Keywords: Aquaculture ; Chemistry ; Ecology ; Environment ; Pollution ; fishponds ; fish pens/cages ; nitrogen ; phosphorus ; nutrient load
    Repository Name: AquaDocs
    Type: article , TRUE
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    Etude des polluants chimiques (Cu, Fe, Zn, Cd et Hg) dans les moules (〈Perna perna〉) prélevées au niveau de la baie du Lévrier. (2006)
    Université de Nice Sophia Antipolis
    Details
    Publication Date: 2021-05-19
    Description: Mémoire de DEA
    Description: Ce travail a pour objectif de déterminer le niveau de contamination des produits halieutiques mauritaniens. Pour cela, nous avons étudié les polluants chimiques (Cu, Fe, Zn, Cd et Hg) dans des moules (〈Perna perna〉) prélevées au niveau de la baie du Lévrier en Mauritanie sur une période de quatre mois (novembre 1998 à février 1999). Sur les 400 échantillons analysés les moyennes de concentrations trouvées restent faibles par rapports à celles trouvées dans d'autres zones peu polluées (Amiard et al. 1986b). Ce qui n'est pas le cas du cadmium qui présente des valeurs plus élevées, phénomène fréquemment rencontré le long de la côte ouest africaine (Sidoumou et al. 1992). Par ailleurs, dans cette présente étude il apparaît que les moules de petites tailles (inférieure à 8 cm) concentrent plus de métaux (Cu, Fe, Zn et Cd) que les grandes tailles (supérieures à 8 cm). Respectivement, pour la station Cabanon nous avons les concentrations suivantes en ltg.g-1 de poids sec (grande taille - petite taille): 4,89 - 5,57 ; 201,41 - 268,15 ; 58,99 - 72,23 ; 3,77 - 5,93. Aussi, les femelles accumulent beaucoup plus de métaux (Cu, Fe, Zn et Cd) que les mâles ; respectivement nous avons pour la station Comeca les concentrations suivantes en gg/g-1 de poids sec (mâle - femelle) : 1,99 - 3,6 ; 98,94 - 115,94 ; 40,67 - 41,99 ; 3,07 - 4,00. Les résultats obtenus nous permettent de conclure que la Baie du Lévrier peut être considérée comme zone non polluée. This work presents a study of metals traces (Cu, Fe, Zn, Cd and Hg) in mussel (〈Perna perna〉) taken in bay of the Bay Lévrier in Mauritania over one four months period (November 1998 at February 1999). On the 400 analyzed samples the averages of found concentrations remain weak by reports/ratios with those found in other zones (Atlantic Ocean) little polluted (Amiard and al 1986b). What is not the case of the cadmium which presents higher values, phenomenon frequently met along the Wests coast African (Sidoumou and al 1992). In addition, in this present study it appears that the mussel of small sizes (lower than 8 cm) concentrate more metals (Cu, Fe, Zn and Cd) that big sizes (higher than 8 cm) ; respectively for the Cabanon station we have the following concentrations in gg.g-1 of dry weight (big sizes - small sizes) : 4,89 - 5,57 ; 201,41 - 268,15 ; 58,99 - 72,23 ; 3,77 - 5,93. Also, the females accumulate much more metals (Cu, Fe, Zn and Cd) that males ; respectively we have for the Comeca station the following concentrations in gg/g-1 of dry weight (males - females) : 1,99 - 3,6 ; 98,94 - 115,94 ; 40,67 - 41,99 ; 3,07 - 4,00. The results obtained enable us to conclude that the Bay of the Lévrier can be regarded as not polluted zone.
    Description: IMROP
    Description: moule, Comeca, Cabanon, Cuivre, Fer, Mercure, Polluants chimiques
    Keywords: Copper ; Iron ; Environmental conditions ; Mercury ; Size ; Zinc ; Chemical analysis ; Copper ; Environmental conditions ; Iron ; Mercury ; Size ; Zinc
    Repository Name: AquaDocs
    Type: Other
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    Anthropogenic and seasonal influence on the sediment-water fluxes for selected metals at Lake Naivasha, Kenya. (2015)
    Kenya Marine and Fisheries Research Institute | Mombasa, Kenya
    Details
    Publication Date: 2021-05-19
    Description: Lake Naivasha is a fresh water lake, situated in the Eastern Rift Valley of Kenya (00 45 S' and 360 20 E). The lake has no surface outlet and is perceived to be under anthropogenic stress. The lake being situated at the basin of the rift valley bares the burden of acting as a receptacle of waste from the town and the surrounding horticultural industry. To investigate the level of pollution due to bioavailable metals, benthic fluxes of selected metals were determined at sites near suspected pollution input sources. In situ benthic flux experiments were conducted at two sites, near the municipal outflow and at the papyrus field near the horticultural farms. Sediment samples from the exposed riparian land were collected during the dry season after the Lake had resided and selected metals fluxes determined in the laboratory under simulated conditions. Al in situ benthic flux at station SS (near the sewage input) was quite high it averaged 7 mmoles m2 h-I and was influenced significantly and positively by pH r=0.89. While Al in situ benthic flux at station SH (located in the papyrus field near horticultural farms) was I mmoles m-2 h-I. Copper Manganese and zinc in situ benthic fluxes were predominantly positive at station SS, however this was not the case at station SH (at papyrus field). The papyrus field at station SH plays an important role in the buffering of the lake in reference to the selected metals investigated, due to the precipitation of redox sensitive metals. Among the metals, analyzed manganese was mobilized the most during the rainy season, after the immediate flooding of the exposed riparian land.
    Description: ? draft of paper published as: Kamau, J.N., Gachanja, A, Ngila, J.C., and Kazungu J., Anthropogenic and seasonal influence on the sediment-water fluxes for selected metals at Lake Naivasha, Kenya. Lakes & Reservoirs: Research and Management ; 2008,13:145-154.
    Description: Unpublished
    Keywords: Heavy metals ; Copper ; Manganese ; Zinc ; Aluminium ; Sediments
    Repository Name: AquaDocs
    Type: Report , Not Known
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    Heavy metals (Cd, Ni and Zn) concentrations in the edible muscle tissue of Pike perch (Esox lucius) from Anzali Wetland (2017)
    Details
    Publication Date: 2021-05-19
    Description: Pike (Esox lucius) is a native species in Anzali Wetland and has been considered for its flesh. This study was carried out to compare the rate of accumulation and concentration of heavy metals such as cadmium, nickel and zinc in edible muscle tissue of pike at three stations (west, center and east) of Anzali wetland in 2012.Ten fishes were randomly caught by gillnet from different stations in standard weights. After removal of the tissue samples, for chemical digestion through mixed acid digestion (HNO3 / HClO4) was performed on samples. Heavy metal concentrations were measured using flame atomic absorption spectrophotometer. The average concentration of cadmium in pike in western station was 0.05 and in eastern and central part of wetland was 0.09 (μg/g dry weight), Mean concentrations of nickel metal in west, center and east, were 0.44, 0.37 and 0.22 (μg/g dry weight), Average concentrations of zinc in western, central and eastern part of wetland were 28, 25.55 and 13.55 (μg/g dry weight) respectively. In this study, concentrations of cadmium, nickel and zinc in edible muscle tissue of pike did not show significant differences between stations (P〉0.05). The cadmium, nickel and zinc standards in American Food and Drug Administration (FDA), World Health Organization (WHO) were compared. The results showed that toxicity of nickel in samples of central was near but in western part was more than the permissible limit compared with the standard WHO = 0.38, therefore consumption of this fish could be a warning of a threat to the health of these fish in vulnerable groups of society.
    Description: Published
    Keywords: Pike perch ; Esox lucius ; Heavy metals ; Muscle ; Tissue ; Nickel ; Cadmium ; Zinc
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.75-80
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    The benefits of fish and rice integrated culture in Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Fish culture in rice field is an ancient activity in Asia and probably it has been a routine activity in China since decades ago. Countries are now gradually finding out the advantages of the activity putting more and more land under the integrated culture. The integrated culture was first conducted in 1983 in Iran. Since then, the activity has been extended in the rice fields of 11 provinces of the country. In an experimental project in 2003, 13 rice fields totally covering 8.2 hectares and 13 control fields with the same size, physical and chemical conditions were chosen to investigate the outcomes of the integrated culture. For this, 1400 specimens of juvenile fish each weighting on average 3545 grams and composed of 57% common cam, 29 % grass carp, 14% silver carp and big head carp were stocked per hectare of each field. The average weight for grass catty individuals was 25-35 grams. Feeding rate was based on the fish biomass. In harvesting time, characteristics of the rice were compared between experimental and control fields in order to determine the quality and quantity changes in the product. At the same time, usage of fertilizer, pesticides and herbicides were measured in both experimental and control fields. The pesticide usage in control fields was 15 kg per hectare, but in experimental fields it was only 5kg per hectare. This showed 66% reduction in pesticide use. In each control field, 2 liters of herbicides was used, as compared to only 0.3 liter per hectare in the experimental fields, showing an 85% percent reduction. The chemical fertilizer (urea, phosphate, potassium) used in the control fields was 169 kg per hectare, translating into a 23% reduction in each experimental field. Overall, rice production increased 302 kg per hectare in the control fields. In this experiment, the profit of fish and rice integrated farming was estimated to be 4,300,000 Rials (US$505). The results showed that enhancing fish and rice integrated farming might increase farmers' profits; while reducing the need to apply fertilizers and pesticides.
    Description: Published
    Keywords: Carp ; Rice ; Fish culture ; Integrated culture ; Urea ; Phosphate ; Potassium
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.97-108
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    Buzzards Bay Water Quality Data from the Buzzards Bay Coalition’s Baywatchers Program 1992-2020 (2021)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2021-07-09
    Description: The Buzzards Bay Coalition’s Baywatchers Monitoring Program collected summertime water quality information at more than 150 stations around Buzzards Bay, Massachusetts from 1992 to 2020. Baywatchers monitoring data document nutrient-related water quality and the effects of nitrogen pollution. The large majority of stations are located in sub-estuaries of the main Bay, although stations in central Buzzards Bay and Vineyard Sound were added beginning in 2007. Measurements include temperature, salinity, Secchi depth and concentrations of dissolved oxygen, ammonium, nitrate + nitrite, total dissolved nitrogen, particulate organic nitrogen, particulate organic carbon, ortho-phosphate, chlorophyll a, pheophytin a, and in lower salinity waters, total phosphorus and dissolved organic carbon. The Baywatchers dataset provides a long-term record of the water quality of Buzzards Bay and its sub-estuaries. The data have been used to identify impaired waters, evaluate discharge permits, support the development of nitrogen total maximum daily loads, develop strategies for reducing nitrogen inputs, and increase public awareness and generate support for management actions to control nutrient pollution and improve water quality. The Readme, STN_EQUIV, Stations and Methods, S_D for WFH, and Acknowledge tabs were updated and corrections were made for Time and POC on 2018 Upper Bay samples and deleted CH1 from sonde method column where no CHL data existed, moved words like "sample lost" from Chl and Pheo data columns to comments column.
    Keywords: water quality ; Buzzards Bay ; nitrogen ; eutrophication ; coastal ; citizen science
    Repository Name: Woods Hole Open Access Server
    Type: Dataset
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    Physicochemical and biological cycles in a tide dominated, nitrogen-polluted temperate estuary (2021)
    In:  http://aquaticcommons.org/id/eprint/15993 | 12051 | 2015-01-29 11:17:12 | 15993 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Spatio-temporal variations in the physicochemical and biological parameters in the Morlaix estuary on the Brittany coast of France were studied. Hydrographically, the estuary can be classified into 3 segments: the upper estuary where stratification always persists, the lower estuary where vertical homogeneity is permanent, and a middle estuary where there is a regular oscillation of stratification and homogeneity during every tidal cycle, stratification being associated with slack waters and homogeneity, with ebb and flood. Nitrogen pollution in the estuary is very intense.
    Keywords: Biology ; Pollution ; chemical pollution ; physicochemical properties ; eutrophication ; hydrography ; pollution effects ; nitrogen ; estuary ; brackish ; Morlay River ; Brittany ; France
    Repository Name: AquaDocs
    Type: article
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    Heavy metals and arsenic in water, bottom sediments and Black Sea turbot (Scophthalmus maeoticus, Pall., 1814) in the Caucasian Shelf area in the Black Sea (1995–2020) (2022)
    Details
    Publication Date: 2022-04-02
    Description: The results of investigation of the pollution of the water and bottom sediments of the Caucasian Shelf in the Black Sea by heavy metals (copper, zinc, lead, cadmium, mercury) and arsenic, as well as their content in the Black Sea turbot Scophthalmus maeoticus (Pallas, 1814) are presented for 1995–2020. In the water and turbot, the determination of Zn, Cu, Pb, As, and Cd has been conducted using the method of atomic absorption with electrothermal atomization; mercury in all components of the ecosystems was measured using the method of atomic absorption with “cold steam”; in the bottom sediments, the content of Zn, Cu, Pb and As was identified using X-ray fluorescence method. In 1995–2020, in some water samples, the concentrations of zinc, copper and mercury exceeded the maximum permissible level established for the water bodies of fisheries importance, while the lead and cadmium were below it. The arsenic content during the entire observation period was extremely low. A noticeable decrease in the concentrations of zinc, lead and copper in the shelf waters of the Black Sea in the present period as compared with the years of the greatest pollution (1995–2002) was recorded. In the bottom sediments, the content of lead, zinc and mercury exceeded their content in the earth's crust for several years; for arsenic, the excess was recorded throughout the entire observation period. This mostly results from the peculiarities of the granulometric composition of the shelf bottom and, to a much lesser extent, from anthropogenic influence. The differences in the bioaccumulation of heavy metals and arsenic in the organs of the Black Sea turbot are shown. Out of the identified elements, only lead, mercury and arsenic in isolated cases exceeded the permissible level in the organs of the turbot in some years.
    Description: Представлены результаты исследований загрязнения тяжелыми металлами (медь, цинк, свинец, кадмий, ртуть) и мышьяком воды и донных отложений Кавказского шельфа Черного моря и собственно черноморского калкана Scophthalmus maeoticus (Pallas, 1814) в период с 1995 по 2020 г. В воде и калкане определение Zn, Cu, Pb, As и Cd проводили методом атомной абсорбции с электротермической атомизацией; ртути во всех элементах экосистемы — методом атомной абсорбции в «холодном паре»; Zn, Cu, Pb и As в донных отложениях — рентгенфлуоресцентным методом. В отдельных пробах воды концентрации цинка, меди и ртути превышали предельно допустимую концентрацию для рыбохозяйственных водоемов, в то время как концентрации свинца и кадмия — нет. Содержание мышьяка в течение всего периода наблюдений оставалось крайне низким. Было отмечено заметное снижение концентраций цинка, свинца и меди в воде шельфа Черного моря в современный период по сравнению с периодом наибольшего загрязнения (1995–2002 гг.). В донных осадках содержание свинца, цинка и ртути в течение ряда лет превышало содержание в земной коре; для мышьяка превышение наблюдалось в течение всего периода наблюдений. Очевидно, что данная ситуация в большей степени связана с особенностями гранулометрического состава дна шельфа, чем с антропогенным влиянием. Показаны различия в биоаккумуляции тяжелых металлов и мышьяка органами черноморского калкана. Из перечня определяемых элементов превышение допустимого уровня в органах калкана отмечалось в отдельные годы в единичных случаях для свинца, ртути и мышьяка.
    Description: Published
    Description: Refereed
    Keywords: Scophthalmus maeoticus ; Mercury ; Copper ; Zinc ; Arsenic ; Cadmium ; Maximum permissible level ; Bottom sediments ; Калкан ; Тяжелые металлы ; Накопление ; Донные отложения ; ASFA_2015::H::Heavy metals ; ASFA_2015::M::Marine pollution ; ASFA_2015::S::Sediment pollution
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.68-88
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    The marine biogeochemistry of zinc isotopes (2007)
    Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-25
    Description: Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 2007
    Description: Zinc (Zn) stable isotopes can record information about important oceanographic processes. This thesis presents data on Zn isotopes in anthropogenic materials, hydrothermal fluids and minerals, cultured marine phytoplankton, natural plankton, and seawater. By measuring Zn isotopes in a diverse array of marine samples, we hope to understand how Zn isotopes are fractionated in the oceans and how Zn isotopes may be used as tracers of marine biogeochemical processes. Common forms of anthropogenic Zn had δ66Zn from +0.08‰ to +0.32‰, a range similar to Zn ores and terrigenous materials. Larger variations were discovered in hydrothermal fluids and minerals, with hydrothermal fluids ranging in δ66Zn from 0.02‰ to +0.93‰, and chimney minerals ranging from -0.09‰ to +1.17‰. Lower-temperature vent systems had higher δ66Zn values, suggesting that precipitation of isotopically light Zn sulfides drives much of the Zn isotope fractionation in hydrothermal systems. In cultured diatoms, a relationship was discovered between Zn transport by either high-affinity or low-affinity uptake pathways, and the magnitude of Zn isotope fractionation. We established isotope effects of δ66Zn = -0.2‰ for high-affinity uptake and δ66Zn = -0.8‰ for low-affinity uptake. This work is the first to describe the molecular basis for biological fractionation of transition metals. Biological fractionation of Zn isotopes under natural conditions was investigated by measuring Zn isotopes in plankton collected in the Peru Upwelling Region and around the world. Seawater dissolved Zn isotopes also reflect the chemical and biological cycling of Zn. The δ66Zn of deep seawater in the North Pacific and North Atlantic is about 0.5‰, and the dissolved δ66Zn gets lighter in the upper water column. This is unexpected based our observations of a biological preference for uptake of light Zn isotopes, and suggests that Zn transport to deep waters may occur by Zn adsorption to sinking particles rather than as primary biological Zn. The thesis, by presenting data on several important aspects of Zn isotope cycling in the oceans, lays the groundwork for further use of Zn isotopes as a marine biogeochemical tracer.
    Description: This research was funded by NSF Research Grants OCE-0002273 and OCE-0326689, the Martin Family Society Fellowship for Sustainability, the Woods Hole Ocean Ventures Fund, and Arunas and Pam Chesonis through an MIT Earth Systems Initiative Ignition Grant.
    Keywords: Zinc ; Isotopes ; Biogeochemical cycles ; Atlantis (Ship : 1996-) Cruise AT11-2
    Repository Name: Woods Hole Open Access Server
    Type: Thesis
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    Changes in micronutrient supply to the surface Southern Ocean (Atlantic sector) across the glacial termination (2011)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry Geophysics Geosystems 12 (2011): Q09007, doi:10.1029/2011GC003691.
    Description: Major deepwater masses upwell and reach the surface in the Southern Ocean, forming an important conduit supplying nutrients and micronutrients to the surface and playing a key role in the regulation of global climate through ocean-atmosphere gas exchange. Here, we reconstruct changes in micronutrient distribution in this region in response to past changes in upwelling, oceanic mixing, and sea-ice seasonality. We present two downcore (Zn/Si)opal records from the Scotia Sea and Drake Passage region, which we interpret in the context of micronutrient distribution in the Atlantic sector of the Southern Ocean over the last glacial termination. Previous work shows that micronutrient availability in the surface waters in the South Atlantic appear to be controlled dominantly by upwelling and mixing of micronutrient rich deepwaters, which are additionally fuelled by the terrestrial sediment sources of the Scotia Arc and South Georgia. This is supported by our reconstructions, which show micronutrient availability to the west of the Scotia Arc and South Georgia are consistently lower than to the east over the last glacial termination due to downstream transport and mixing into surface waters of continentally derived material in the Antarctic Circumpolar Current. Micronutrient availability in this region was at a minimum from 20 to 25 ky BP, coinciding with maximum sea-ice coverage, and increased due to an expansion of the seasonal sea-ice zone and increased mixing of subsurface waters. Our findings are consistent with largely diminished upwelling of micronutrients during the maximum glacial extent, and reduced mixing due to the presence of persistent sea-ice. During the deglacial there was an increase in micronutrient availability, as well as other nutrients and inorganic carbon, within the Antarctic Circumpolar Current as a result of an increase in deep oceanic upwelling, mixing and strengthened zonal transport.
    Description: This work was funded by NERC/S/A/2004/12390 and the Antarctic Funding Initiative grant AFI4–02.
    Keywords: Deglaciation ; Diatom opal ; Westerlies ; Zinc
    Repository Name: Woods Hole Open Access Server
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    The cobalt cycle in the Tropical Pacific Ocean (2017)
    Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-25
    Description: Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 2017
    Description: Although over a dozen elements are needed to support phytoplankton growth, only a few are considered to be growth-limiting. As the central atom in vitamin B12, cobalt is crucial for metabolism, but its status as a limiting nutrient is uncertain. This thesis investigates the geochemical controls on oceanic cobalt scarcity and their biological consequences. Analysis of over 1000 samples collected in the Tropical Pacific Ocean reveals a dissolved cobalt distribution that is strongly coupled to dissolved oxygen, with peak concentrations where oxygen is lowest. Large cobalt plumes within anoxic waters are maintained by three processes: 1) a cobalt supply from organic matter remineralization, 2) an amplified sedimentary source from oxygen-depleted coastlines, and 3) low-oxygen inhibition of manganese oxidation, which scavenges cobalt from the water column. Rates of scavenging are calculated from a global synthesis of recent GEOTRACES data and agree with cobalt accumulation rates in pelagic sediments. Because both sources and sinks are tied to the extent of oxygen minimum zones, oceanic cobalt inventories are likely dynamic on the span of decades. Despite extremely low cobalt in the South Pacific gyre, the cyanobacterium Prochlorococcus thrives. Minimum cobalt and iron requirements of a Prochlorococcus strain isolated from the Equatorial Pacific are quantified. Cobalt quotas are related to demand for ribonucleotide reductase and methionine synthase enzymes, which catalyze critical steps in DNA and protein biosynthesis, respectively. Compared to other cyanobacteria, a streamlined metal physiology makes Prochlorococcus susceptible to competitive inhibition of cobalt uptake by low levels of zinc. Although phytoplankton in the Equatorial Pacific are subject to chronic iron-limitation, widespread cobalt scarcity and vulnerability to zinc inhibition observed in culture imply that wild Prochlorococcus are not far from a cobalt-limitation threshold.
    Description: I am lucky to have benefitted from major financial support of the Saito Lab by the National Science Foundation and the Gordon and Betty Moore Foundation. Specifically, National Science Foundation grants for the Center for Microbial Oceanography Research and Education (CMORE, DBI-0424599), GEOTRACES Pacific and Artic projects (OCE-1233261 and OCE- 1540254), and OCE-1220484 funded my thesis work. National Science Foundation grants OCE- 1031271 and OCE-1337780 and Gordon and Betty Moore Foundation grants 3782 and 3934 to the Saito lab also provided instrumentation and funded field expeditions that enabled this work.
    Keywords: Cobalt ; Zinc ; Plankton ; Kilo Moana (Ship) Cruise KM1128
    Repository Name: Woods Hole Open Access Server
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    Dissolved zinc in the subarctic North Pacific and Bering Sea : its distribution, speciation, and importance to primary producers (2012)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 26 (2012): GB2015, doi:10.1029/2010GB004004.
    Description: The eastern subarctic North Pacific, an area of high nutrients and low chlorophyll, has been studied with respect to the potential for iron to control primary production. The geochemistry of zinc, a critical micronutrient for diatoms, is less well characterized. Total zinc concentrations and zinc speciation were measured in near-surface waters on transects across the subarctic North Pacific and across the Bering Sea. Total dissolved zinc concentrations in the near-surface ranged from 0.10 nmol L−1 to 1.15 nmol L−1 with lowest concentrations in the eastern portions of both the North Pacific and Bering Sea. Dissolved zinc speciation was dominated by complexation to strong organic ligands whose concentration ranged from 1.1 to 3.6 nmol L−1 with conditional stability constants (K′ZnL/Zn′) ranging from 109.3 to 1011.0. The importance of zinc to primary producers was evaluated by comparison to phytoplankton pigment concentrations and by performing a shipboard incubation. Zinc concentrations were positively correlated with two pigments that are characteristic of diatoms. At one station in the North Pacific, the addition of 0.75 nmol L−1 zinc resulted in a doubling of chlorophyll after 4 days.
    Description: This research was supported by NSF grant OCE-0136835 and by an EPA STAR Fellowship.
    Description: 2012-11-12
    Keywords: North ; Pacific ; Diatoms ; Speciation ; Zinc
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    Elemental concentration and size relationship in African cuttlefish Sepia bertheloti, from the coastal waters of Qua Iboe River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23249 | 19325 | 2018-03-25 14:29:19 | 23249 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Ten specimens of African cuttlefish, Sepia bertheloti, from the coastal waters off Qua Iboe River, Southeast Nigeria, were analyzed for the relationship between the concentration of the elements and the size of the species. Energy Dispersive X-ray fluorescence technique was employed to determine the elemental composition of the species. Eleven elements were identified in the body of cuttlefish. These were Chlorine, Strontium, Potassium, Calcium, Bromine, Iron, Copper, Zinc, Manganese, Nickel and Selenium of these elements, the concentration of calcium, potassium. Copper and strontium had a positive correlation with the weight, while the concentrations of manganese, nickel, chlorine, iron were negatively correlated with their weights. However, only manganese had a significantly negative correlation (p〈0. 05). Bromine and zinc had no correlation with the weights of the species. There also existed a significant positive correlation between Ca and K, Se and Ni, Cu, Br and Zn and St and K. We conclude that African cuttlefish, irrespective of size is a rich source of nutritional elements and is especially recommended for pregnant women and for all age groups.
    Description: Includes:- 2 figs.;9 refs.
    Keywords: Fisheries ; Sepia bertheloti ; ASE ; Nigeria ; Gulf of Guinea ; Nigeria ; Qua Iboe R. ; freshwater environment ; marine environment ; Nutritional requirements ; Potassium ; Nutrition
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    Effects of Zinc and Copper exposure on growth and survival of Artemia urmiana and Artemia franciscana (2021)
    In:  http://aquaticcommons.org/id/eprint/23669 | 18721 | 2018-07-16 17:09:33 | 23669 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The effects of exposure to Zinc and Copper in developing from nauplius to adult stages in two species, Artemia urmiana and A. franciscana were studied. The growth and lifespan of the specimens under treatments also have been investigated. During the period of the experiments, both species of Artemia were exposed by Zinc-treated groups (23, 68, 114 mg/l) and also copper-treated groups (13, 25, 38 mg/l) and compared with control group without any metal treatment. However, in treatments with Zinc and Copper concentrations, lifespan was reduced in comparison with that of the control treatments. Results showed that Zinc and Copper have toxic effects on A. urmiana and A. franciscana. Although the resistance of both of them was high, but A. urmiana was more endure than A. franciscana. It is suggested that the two Artemia species might have adopted a strategy to speed up growth and reproduce before metal pollution can cause death for them. Also, this study indicated that Zinc was less toxic than Copper for the two species investigated.
    Keywords: Aquaculture ; Growth ; Zinc ; Survival ; Reproduction ; Toxicity ; Copper ; Toxicity tolerance ; Marine ; Artemia franciscana ; Artemia urmiana ; Tehran Province ; Iran
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    The correlation of length and weight of Kutum (Rutilus frisii kutum) in the central south of Caspian Sea with copper and zinc concentration in muscle and liver tissues (2021)
    In:  http://aquaticcommons.org/id/eprint/23685 | 18721 | 2018-07-18 06:54:47 | 23685 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Concentration of copper (Cu) and zinc (Zn) in liver and muscle tissues of Kutum (Rutilus frisii kutum) of the Caspian Sea was assessed to study possible correlation of length and weight and the bioaccumulation of these heavy metals in the fish. Concentration of the metals in liver was higher than muscle (Zn: 55.2, Cu: 41.5 kg/g) while the concentrations in the muscle tissue were lower than permissible limits proposed by FAO. Significant correlations were not detected between mean Zn and cu concentration and fish size. Finally, no significant difference was found in the concentration of the heavy metals in male and female fish specimens (P〉0.05).
    Keywords: Fisheries ; Pollution ; Length-weight relationships ; Bioaccumulation ; Fish physiology ; Heavy metals ; Zinc ; Muscles ; Liver ; Copper ; Freshwater fish ; Correlation analysis ; Rutilus frisii ; Brackish ; Caspian Sea ; Caspian Sea Eurasia ; Iran
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    Effect of zinc on the distribution of major cations and anions in the muscle of the fresh water catfish Clarias gariepinus (Burchell, 1822) collected from Ebonyi River, South East Nigeria (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24214 | 19325 | 2018-05-19 06:50:34 | 24214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of zinc exposure evaluated during a four day exposure periods at 13.88ppm, 26.75ppm, 53.5ppm,107ppm and 214ppm to Clarias gariepinus sub-adults showed the 96h LC50 as 26.62ppm. The threshold value was 20.30ppm. The muscle of the exposed fish analyzed showed a significant decrease in all the major cations and anions (Na+, CL-, Ca2+ K+, Mg2+) at (p〈0.05). The research revealed that there was no total inhibition of uptake of the cations and anions and also that uptake of these metals, that is cations and anions (Na+,-CL-, Ca2+ K+, Mg2+) increased rapidly during the 24 hours and dropped at 48 hours and 72 hours and gradually increased at the end of 96 hours showing that it was time dependent. During exposure period, affected fish stood in upright position with their snouts above the water surface, gasping for air. Observation of the exposed fish showed that they were peeling of skin, increase in opercula movement, erratic swimming, quietness and finally death. This research therefore recommends that zinc should be applied appropriately at 26.30ppm to avoid death of fish, man and other aquatic organisms that are the chief consumer.
    Description: Includes: 13 references.
    Keywords: Pollution ; Fisheries ; Clarias gariepinus ; Nigeria ; Ebonyi State ; Ebonyi River ; Zinc ; Muscle ; Cations ; Anions ; Clarias gariepinus ; Zinc ; Freshwater fish ; Cations ; Pollution effects ; Trace metals ; Bioaccumulation ; Muscles ; Pollutants ; Anions ; River fisheries ; Lethal limits
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    Assessment of some heavy metals pollution in Clarias gariepinus in the vicinity of Lake Chad, Nigerian sector, using energy dispersive X-ray fluorescence (EDXRF) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24243 | 19325 | 2018-05-20 05:39:07 | 24243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Globally, aquatic ecosystems are highly polluted with heavy metals from anthropogenic and terrigenous sources. The objectives of this study, is to portray the use of EDXRF for the analysis of heavy metal pollution in Clarias gariepinus. C. gariepinus were collected from Dumba, Lake Chad, Nigerian sector and analyzed with EDXRF with 〈sup〉109〈/sup〉Cd as excitation source of the samples. The concentrations of Cadmium, Chromium, Copper, Manganese, Iron, Lead and Zinc (Cd, Cr, Cu, Mn, Fe, Pb and Zn) in mg/kg were determined in C. gariepinus and were compared with World Health Organization (WHO, 1985) and Federal Environmental Protection Agency (FEPA, 2003) to ascertain the level of Cd, Cr, Cu, Mn, Fe, Pb and Zn in C. gariepinus from Dumba. The results indicated that C. gariepinus is polluted with Cr, Cu, Mn, and Pb when compared with permissible limit of WHO, 1985 and FEPA, 2003. Therefore, the consumption of C. gariepinus from Dumba may pose a health risk.
    Description: Includes: 12 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Heavy metals ; Pollutants ; Freshwater fish ; X-ray fluorescence analysis ; Standards ; Acceptability ; Pollution effects ; Cadmium ; Chromium ; Copper ; Manganese ; Iron ; Lead ; Zinc
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    Investigation of mercury concentration and its interaction with zinc and selenium at the muscle and liver tissues of Whitecheek Shark (Carcharhinus dussumieri) from Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/21891 | 18721 | 2018-01-15 13:55:59 | 21891 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: Mercury, zinc and selenium concentrations were analyzed in the muscle and liver of 25 Whitecheek Shark (Carcharhinus dussumieri) from the coast of Bandar Abbas. The level of Hg accumulation and its interaction with Zn and Se in Whitecheek Shark were studied. Hg, Zn and Se concentrations were determined by an Advanced Mercury Analyzer (LECO, AMA 254), Atomic Absorption Spectrometer (ASS,PU 9400) and Graphite Furnace Atomic Absorption Spectrophotometry (Perkin Elmer 3030) respectively. The mean (±SD) of Hg, Zn and Se concentrations were 0.05±0.02, 0.92±0.25 and 0.13±0.05µg/g wet wt in the muscle and 1.07±0.86, 1.57±0.43 and 0.46±0.19µg/g wet wt in the liver tissues, respectively. The mean of Hg, Zn and Se in liver tissue was significantly higher than muscle tissue. Also, 64% of liver samples showed levels above the acceptable limit established by WHO and FAO. A positive correlation was found between Hg and Se concentrations in the muscle and liver tissues with weight and length variables were statistically significant. In this study, the accumulation of Se in the muscle and liver of Whitecheek shark showed a positive correlation with Hg concentration. The mean molar ratio of Se to Hg found in the muscle and liver were 6.36±1.77 and 2.74±3.61, respectively. Positive correlations between Hg and Se showed efficient detoxifying mechanism and as a result, the possibility of reduction in toxicity of mercury in both tissues via Se-Hg complexes or the binding of Hg with selenoproteins.
    Keywords: Biology ; Fisheries ; Pollution ; Mercury ; Zinc ; Selenium ; Whitecheek Shark ; Persian Gulf ; Iran ; tissues ; liver ; muscle ; Carcharhinus dussumieri
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    The effects of heavy metals concentration in some commercial fish in Ogun River, Opeji, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24219 | 19325 | 2018-05-19 07:00:18 | 24219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on commercially important fish species of heavy metals in water bodies, The primary objectives were to find out the amount of heavy metals concentration in the fish species, sediments and water samples at the deep and shallow part of the river, to determine the toxicity and relationship between the collected samples and the rate at which it pollutes the water. Atomic Absorption Spectrophotometer (AAS) evaluate their wholesomeness for human consumption. Four heavy metals (Lead, Cadmium, Copper and Zinc) were analysed and only Copper and Zinc were found to be present in the digested samples. The concentration of Copper in the fish (flesh) is 0.09mg/l and that of Zinc is 0.25mg/l. In the bone samples, Copper was found to have 0.17mg/l and Zinc to be 0.22mg/l. In the water samples analyzed, the concentration of Copper is 0.035mg/1 while that of Zinc is 0.047mg/l. In the sediment sample, the amount of Copper is 310.0mg/kg while that of Zinc is 20.50.0mg/kg. This however signifies that the fish species in the Ogun River as well as the water is suitable for consumption which was found to be less than the World Health Organization (WHO's) maximum recommended acceptable limits in the food.
    Description: Includes: 7 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Ogun R. ; freshwater environment ; Heavy metals ; Pollution effects ; Freshwater fish ; Fisheries ; Toxicity ; Pollutants ; Quality assurance ; Commercial species ; Sediment pollution ; Water analysis ; Lead ; Cadmium ; Copper ; Zinc ; Freshwater pollution ; Health and safety
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    Heavy metal determination in fish species of Anzali Lagoon (2021)
    In:  http://aquaticcommons.org/id/eprint/23895 | 18721 | 2018-08-01 14:02:06 | 23895 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: An investigation of the transference of five heavy metals, Zinc, Cobalt, mercury, lead and cadmium to the edible portions of commercially valued fish species Esox lucius (3-7 years) Carassius auratus (3 - 6 years) Cyprinus carpio (3 - 8 years) Hypophthalmichthys molitrix (1 - 3 years) was conducted. The concentration of Zn, Co, Pb, and Cd were measured using Flame Atomic Absorption Spectrophotometer and Hg with Flameless Atomic Absorption using cold mercury vapour. Average accumulated levels of Zn, Cd, Co, Pb and Hg in the muscle tissue of the fishes under survey were 17.28 ± 4.80 ppm, 0.025 ± 0.021 ppm, 0.693 ± 0.48 ppm and 1.04 ± 0.60 ppm of dry weight (X STD) respectively. Detected concentrations at present study do not exceed from tolerance levels based on WHO standards, except in six year old pike specimens sampled in an area exposed to industrial effluents which tend to reach critical levels. Thus this study shows that for the conservation of the Anzali Lagoon and the protection of human health serious environmental policies must be adopted regionally, emphatically on the Anzali Lagoon catchment area.
    Keywords: Pollution ; Investigation ; Transference ; Heavy metals ; Zinc ; Cobalt ; Mercury ; Lead ; Cadmium ; Edible portions ; Esox lucius ; Carassius auratus ; Cyprinus carpio ; Hypophthalmichthys molitrix ; Spectrophotometer ; Muscle tissue ; Survey ; Weight ; Critical levels ; Fish ; Species ; Industrial ; Environmental ; Regionally ; Emphatically ; Anzali Lagoon ; Iran
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    The effect of heavy metal on Chlorella vulgaris, Scenedesmus obliquus and Anabaena flos-aquae (2021)
    In:  http://aquaticcommons.org/id/eprint/24843 | 18721 | 2018-07-17 00:36:15 | 24843 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: In this survey two species of chlorophyta (Chlorella vulgaris and Scenedesmus obliquus) and one species of blue-green algae (Anabaena flos- aquae) were exposed with heavy metal (zinc) under lab condition (temp. 25±2°C, light 3500±350 lux) for 96 hours. After this time, these species were counted with hemocytometer and based on probit analysis method and was determined ECIO, EC50 and EC90. Amount of EC50 for C. vulgaris, S. obliquus and A. flos-aquae were 0.134,0.047 and 0.093 mg/lit, respectively and this subject was distincted that S obliquus has more endurance than other species. Max value of zinc for these species (C. vulgaris, S. obiquus and A. flos-aquae ) were 0.0134, 0.0047 and 0.0093 mg/l respectively. Regression coefficient was 92-98 percent between concentration logarithm of zinc and decrease of these species density.
    Keywords: Biology ; Chemistry ; Pollution ; Zinc ; Scenedesmus Obliquus ; Chlorella vulgaris ; Anabaena Fios-aquae ; Iran
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    Possibility of determination of sex and gonadic stage of sturgeons using blood and morphometric indices (2021)
    In:  http://aquaticcommons.org/id/eprint/24866 | 18721 | 2018-11-22 07:05:43 | 24866 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-15
    Description: Successful management of sturgeon population requires knowledge of stock composition with regard to sex and gonadic stage. Measurement of sex steroid concentration has proven to be a reliable and less invasive method in compare to convention methods. In this study we have examined the possible role of plasma testosterone (T), estradiol (E2), progesterone (P), cortisol (C) and morphometric parameters as indicators of sex and stage of gonadal development in immature (4-5 years old) Great sturgeon cultured in brackish water. Biometry of fishes, blood sampling from caudal vein was performed every three month and plasma was frozen until analyses. Glucose was measured with auto analyzers, calcium and magnesium with spectrophotometer and sodium and potassium with film photometer, Hormone levels were measured by radio immunoassay (RIA). Histological preparation was stained with hematoxylin and eosin. In sex determination, result show that total length (L) and weight (W) had no significant elevation in different sexes and cannot be used as an indicator sex determination. Among hormones only T had significant elevation, so it could be stated that level of T in immature Great sturgeon could be used to identify sex. In case of gonadic stage result show that total L and W just in male had significant correlation with gonadal stage and among hormones just T in male and C in female had significant correlation. So it could be concluded that in male and female respectively based on T and C measurement gonadic stage in immature Grate sturgeon could be identified.
    Keywords: Biology ; Sex determination ; Gonadal stage ; Blood index ; Beluga ; Sturgeon ; Length ; Weight ; Calcium ; Magnesium ; Sodium ; Potassium ; Hormone ; Population ; Gonad ; Iran
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    Influences of dietary lipid and phosphorus levels on retention and excretion of phosphorus and nitrogen in fingerlings red sea bream, Pagrus major (2021)
    In:  http://aquaticcommons.org/id/eprint/18910 | 12051 | 2015-11-28 13:28:31 | 18910 | Bangladesh Fisheries Research Institute
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    Publication Date: 2021-07-12
    Description: A laboratory based 2x3 factorial experiment was conducted for 12 weeks to investigate the influences of dietary lipid and phosphorus (P) levels on retention and excretion of phosphorus and nitrogen (N) in fingerling red sea bream. Twolevels of lipid (210 and 260 g/kg) and three levels of phosphorus (17, 14 and 12 g/kgˉ¹) in the dry diets were tested. Duplicate groups of 25 red sea bream (averageweight 3.74±0.07 g) per 60L glass tank were fed experimental diets three times a day near to satiation level at 22 to 28°C water temperature. A reduction in dietary fish meal from 500 to 300 g/kg dry diet, corresponding to a supplementation in both dietary lipid and P resulted in significant increase in both P and N retention which resulted in the reduction of their excretion by red sea bream. The overall results of the present study demonstrated that both lipid and phosphorussupplementation are necessary for developing less-polluting feed which in turn, reduce fish meal level in the diet of fingerling red sea bream. Further studies in this regard with different size and age groups of red sea bream are warranted.
    Keywords: Aquaculture ; Chemistry ; lipid ; phosphorus ; nitrogen ; excretion ; red sea bream ; Pagrus major
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    Nutrient composition of three commercially important fishes in Lake Kainji, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23331 | 19325 | 2018-04-06 16:11:10 | 23331 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition, mineral content and amino acid profile of Synodontis membraneceous, Oreochromis niloticus and Pellonula afzeluisi was conducted. Results showed that P. afzeluisi had the highest crude protein content (73.00%) amino acid and mineral content. This was followed by O. niloticus (57.87%) and S. membraneceous (54.56%). Organoleptic analysis however showed that O. niloticus had significant overall acceptability, taste and aroma.
    Description: Includes:- 4 tables.;13 refs.
    Keywords: Fisheries ; Synodontis membraneceous ; Oreochromis niloticus ; Pellonula afzeluisi ; Nigeria ; Kainji L. ; freshwater environment ; Nutrition ; Nutritional types ; Sodium ; Calcium ; Potassium ; Magnesium ; Phosphorus ; Amino acids
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    Trace metals in water, fish and sediments from Elechi Creek, Port Harcourt, River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24220 | 19325 | 2018-05-19 07:02:08 | 24220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The concentration of trace metals: Cadmium (Cd), Lead (Pb), magnesium (Mn), Nickel (Ni) and Zinc (Zn) were determined in water, sediment and fish tissues (S. melanotheron) collected from Elechi creek in Port Harcourt, Nigeria between October and November, 2010. The overall mean concentrations of the trace metals (Mg/g dry weight) in all combined samples ranged from 0.06-0.24 (Cd), 0.59-2.39 (Pb), 0.08-1.15 (Mn), 0.15-0.48 (Ni) and 0.18-7.04 (Zn) respectively. The concentration of the trace metals in water, fish and sediments were in the following order: Pb 〉Ni 〉Zn〉Cd 〉Mn; Zn〉Pb 〉Mn〉Ni 〉Cd and Zn〉 Pb〉Mn〉Ni〉Cd respectively. Except in water, Zinc had the highest value while cadmium had the lowest value. Mn concentration in fish tissue was greater than WHO/FAO certified values. Correlation coefficients between pairs of metals concentration show that all metals positively correlate except Cadmium and Nickel. Elechi creek is not heavily burdened with metals, but aquatic environment should be monitored periodically to avoid excessive intake of trace metals by human.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Limnology ; Pollution ; Sarotherodon melanotheron ; Nigeria ; Elechi Creek ; Trace metals ; Elechi Creeks ; S. Melanotheron ; Sediments ; brackishwater environment ; Trace metals ; Pollutants ; Pollution effects ; Pollution monitoring ; Water analysis ; Brackishwater fish ; Sediment pollution ; Brackishwater pollution ; Heavy metals ; Lead ; Cadmium ; Zinc ; Nickel ; Magnesium
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    Possibility of trout farms efluent return to groundwater In non-agricultural seasons (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25358 | 18721 | 2018-09-14 07:33:31 | 25358 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This project is trying to investigate water contamination after use in ponds. For this aquaculture status, physical and chemical water properties, microbial pollutants and heavy metals levels in the some of trout ponds effluent in East Azerbaijan province were evaluated in 2007 to 2009. The information of groundwater and climate conditions in ten years, Drilling and wells piezometric Information, in local wells are reviewed. According to data obtained from analysis of water samples in the output pools range studied concentrations(term mg/l) some parameters are as follows:(BOD: 1.9-3.2), (COD: 3.4-34.1), (TSS: 26.6-42.7), (N-NO_2:0.003-.136),(P-Po4:0.0170.067), (pH:7.75-8.28). Electrical conductivity (500 ±2 to 1129±144 term µm/cm) in the effluent ponds. Based on the results of we can say that between input and effluent ponds in the review of all factors as chlorine, sulfate, sodium, potassium, total nitrogen, soluble phosphorus, total phosphorus, calcium, total hardness, magnesium, alkalinity and silica significant changes not be observed. Review of water analysis data to some factors (such as: water temperature, EC, pH, NO_2, CO_2, HCO_3, CO_3, DO, COD, BOD) and compare this data with the authorities standard confirmed that the All factors mentioned in effluent is allowed now. In terms of microbial contamination and heavy metals (Zn, Cu, Ca, Pb, Fe, Cr) is no pollution. Appropriate strategies for removing suspended materials must to use. We can use Watershed Management solutions to inject output water to the underground table. Should be noted status change (eg change in flow rate, an unusual increase in temperature, fish density increasing, reducing food quality, lack of appropriate management actions and ...) may reduce the effluent quality and the ability of injection water underground to lose. In this case, measures must be for wastewater treatment and improve the quality ponder.
    Keywords: Ecology ; Management ; Iran ; East Azerbaijan Province ; Effluent Trout ; Return ; Ground Water ; Non-agricultural ; Aquaculture ; Pollutants ; Heavy metals ; Samples ; Chlorine ; Sulfate ; Sodium ; Potassium
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 88
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  • 46
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    Analysis and estimation of trace metals in seawater and sediment in the South China Sea, Area IV: Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26394 | 23782 | 2019-04-08 07:18:13 | 26394 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publication Date: 2021-07-24
    Description: Water samples from off shore of Vietnam from latitude 6°N to 21°N and longitude 103°C to 112°E were collected on 30 April 1999 to 29 May 1999 and analyzed for copper (Cu), lead (Pb), cadmium (Cd), zinc (Zn), nickel (Ni), chromium (Cr), arsenic (As) and mercury (Hg). The concentration of metals Cu, Pb, Cd, Zn, Ni and Cr was measure using flameless atomic absorption spectroscopy. The total concentration of all eight metals was in concentration ranges of unpolluted coastal water. The results indicated that the concentration of metals in bottom layer higher than in surface layer. Also, trace metal contents in the surface sediment were studied in off shore of Vietnam during this cruise. Total metals content were measured. The range of concentration of metals were 10.3 - 71.0 mg.g-1 for Cu, 12.9 - 33.7 mg.g-1 for Pb, 1.29 - 18.72 mg.g-1 for Cd, 45.8 - 164.8 mg.g-1 for Zn, 21.2 - 93.6 mg.g-1 for Cr, 5.7 - 45.8 mg.g-1 for Ni, 1.64 - 3.80 mg.g-1 for As, and 0.104 - 0.493 mg.g-1 for Hg. The levels found in the present study are similar to data from other marine.
    Keywords: Oceanography ; Arsenic ; Chromium ; Heavy metals ; Nickel ; Copper ; Water analysis ; Sediments ; Water pollution ; Lead ; Trace elements ; Scientific research ; Sea water ; Zinc ; Mercury ; Cadmium ; Viet Nam ; South China Sea
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 374-408
    Format: 35
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    Heavy metal content of sole, Solea solea and croaker, Pseudotolithus typus from Lagos and Delta State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24227 | 19325 | 2018-05-19 07:16:39 | 24227 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigated the levels of lead (Pb), cadmium (Cd), Copper (Cu), Chromium (Cr) and Zinc (Zn) in two common edible fish species, Sole, Solea solea and Croaker, Pseudotolithus typus from Makoko and Koko in Lagos and Delta states respectively. Heavy metal contents were determined by air-acetylene flame Atomic Absorption Spectrophotometer after wet digestion of dried and milled samples with 1:1 HN0〈sub〉3〈/sub〉: H〈sub〉2〈/sub〉O〈sub〉2〈/sub〉. Results obtained (~kg/g, dry weight) for Sole in Lagos and Delta states were: Pb (0.330 and 0.149), Cd (0.097 and 0.063), Cu (0.869 and 0.434), Cr (1.184 and 0.826), Zn (7.612 and 7.890); and Croaker: Pb (0.163 and 0.045), Cd (0.115 and 0.029), Cu (0.990 and 0.694), Cr (1.008 and 1.038) and Zn (6.756 and 6.168) for the wet season (April-October); and Pb (0.534 and 0.527), Cd (0.373 and 0.410), Cu (0.437 and 0.556), Cr (0.834 and 0.983), Zn (6.764 and 9.343) for sole and Pb (0.210 and 0.213), Cd (0.264 and 0.307), Cu (0.442 and 0.483), Cr (0.577 and 0.597) and Zn (4.783 and 5.924) for croaker in the wet season (July-October). Significant (P~B 0.05) variations were observed in metal content between fish in terms of species, location and season. Generally, sole had higher metal concentrations than croaker; and metal contents were higher in samples from Lagos compared to Delta, probably due to the contribution of more effluents from industrial, commercial and municipal wastes in Lagos state. Cd and Cr levels in the test species were found to exceed international standards. It is recommended that a programme of continuous monitoring and control of the physical and chemical characteristics of components and food products of Nigeria's coastal zone be incorporated as a management tool for this important ecological zone.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Pollution ; Solea solea ; Pseudotolithus typus ; ASE ; Nigeria ; Lagos Lagoon ; ASE ; Nigeria ; Delta ; freshwater environment ; Heavy metals ; Comparative studies ; Seasonal variations ; Flatfish fisheries ; Effluents ; Pollutants ; Environmental monitoring ; Pollution control ; Pollution effects ; Pollution monitoring ; Freshwater fish ; Industrial wastes ; Freshwater pollution ; Lead ; Cadmium ; Copper ; Chromium ; Zinc ; Bioaccumulation ; Food fish
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 295-299
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    Assessment of heavy metals concentration in the sewage treatment pond of the Ahmadu Bello University (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24248 | 19325 | 2018-05-20 05:48:06 | 24248 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Heavy metal concentration of the water in the sewage treatment pond of the Ahmadu Bello University Zaria, Nigeria, was studied between April and September, 2007 using Energy Dispensive X-Ray Fluorescence (ED-XRF)analysis. The Mean ~c S.E of ten (10) Heavy Metals observed during the study is as follows: Vanadium 0.75 ~c 0.07mg/L; Chromium 0.69 ~c 0.04mg/L; Manganese 0.61 ~c 0.06mg/L; Iron 0.40 ~c 0.03mg/L; Cobalt 0.31 ~c 0.02mg/L; Nickel 0.25 ~c 0.02mg/L; Copper 0.25 ~c 0.02mg/L; Zinc 0.31 ~c 0.08mg/L; Arsenic 0.24 ~c 0.02mg/L and Lead 0.31 ~c 0.08/L. Metal Index of between 67.32-93.72 was observed during the study period. Metals like Lead, Arsenic, Nickel, Iron, Manganese and Chromium showed concentrations above NIS and WHO Maximum Allowable Concentration for drinking water while metals like Zinc and Copper showed concentrations below the NIS and WHO Maximum Allowable Concentration for drinking water, Vanadium and Cobalt had no values for comparison.
    Description: Includes: 12 references.
    Keywords: Pollution ; Nigeria ; Zaria ; Heavy metals ; Sewage pond ; Concentration ; freshwater environment ; Heavy metals ; Industrial wastes ; Pollutants ; Pollution effects ; Sewage ponds ; Lead ; Vanadium ; Chromium ; Manganese ; Iron ; Cobalt ; Nickel ; Copper ; Zinc ; Arsenic
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 379-382
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    Heavy metal determination in fish species of Anzali Lagoon (2018)
    Details
    Publication Date: 2021-05-19
    Description: An investigation of the transference of five heavy metals, Zinc, Cobalt, mercury, lead and cadmium to the edible portions of commercially valued fish species Esox lucius (3-7 years) Carassius auratus (3 - 6 years) Cyprinus carpio (3 - 8 years) Hypophthalmichthys molitrix (1 - 3 years) was conducted. The concentration of Zn, Co, Pb, and Cd were measured using Flame Atomic Absorption Spectrophotometer and Hg with Flameless Atomic Absorption using cold mercury vapour. Average accumulated levels of Zn, Cd, Co, Pb and Hg in the muscle tissue of the fishes under survey were 17.28 ± 4.80 ppm, 0.025 ± 0.021 ppm, 0.693 ± 0.48 ppm and 1.04 ± 0.60 ppm of dry weight (X STD) respectively. Detected concentrations at present study do not exceed from tolerance levels based on WHO standards, except in six year old pike specimens sampled in an area exposed to industrial effluents which tend to reach critical levels. Thus this study shows that for the conservation of the Anzali Lagoon and the protection of human health serious environmental policies must be adopted regionally, emphatically on the Anzali Lagoon catchment area.
    Description: Published
    Keywords: Industrial ; Environmental ; Regionally ; Emphatically ; Investigation ; Transference ; Heavy metals ; Zinc ; Cobalt ; Mercury ; Lead ; Cadmium ; Edible portions ; Esox lucius ; Carassius auratus ; Cyprinus carpio ; Hypophthalmichthys molitrix ; Spectrophotometer ; Muscle tissue ; Survey ; Weight ; Critical levels ; Fish ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-16
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    The benefits of fish and rice integrated culture in Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Fish culture in rice field is an ancient activity in Asia and probably it has been a routine activity in China since decades ago. Countries are now gradually finding out the advantages of the activity putting more and more land under the integrated culture. The integrated culture was first conducted in 1983 in Iran. Since then, the activity has been extended in the rice fields of 11 provinces of the country. In an experimental project in 2003, 13 rice fields totally covering 8.2 hectares and 13 control fields with the same size, physical and chemical conditions were chosen to investigate the outcomes of the integrated culture. For this, 1400 specimens of juvenile fish each weighting on average 35-45 grams and composed of 57% common carp, 29 % grass carp, 14% silver carp and big head carp were stocked per hectare of each field. The average weight for grass carp individuals was 25-35 grams. Feeding rate was based on the fish biomass. In harvesting time, characteristics of the rice were compared between experimental and control fields in order to determine the quality and quantity changes in the product. At the same time, usage of fertilizer, pesticides and herbicides were measured in both experimental and control fields. The pesticide usage in control fields was 15 kg per hectare, but in experimental fields it was only 5kg per hectare. This showed 66% reduction in pesticide use. In each control field, 2 liters of herbicides was used, as compared to only 0.3 liter per hectare in the experimental fields, showing an 85% percent reduction. The chemical fertilizer (urea, phosphate, potassium) used in the control fields was 169 kg per hectare, translating into a 23% reduction in each experimental field. Overall, rice production increased 302 kg per hectare in the control fields. In this experiment, the profit of fish and rice integrated farming was estimated to be 4,300,000 Rials (US$505). The results showed that enhancing fish and rice integrated farming might increase farmers' profits; while reducing the need to apply fertilizers and pesticides.
    Description: Published
    Keywords: Physical ; Chemical ; Experimental ; Integrated culture ; Carp ; Rice ; Feeding ; Biomass ; Pesticide ; Fertilizer ; Urea ; Phosphate ; Potassium
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.97-108
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    Nutrients and biological production in lakes (2021)
    In:  http://aquaticcommons.org/id/eprint/3660 | 424 | 2011-09-29 17:00:25 | 3660 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-28
    Description: This paper is a review of studies on effects of nutrients on biological productivity and efforts made so far at restoration of nutrients in lakes. It is to provide an understanding of the basis scientific process accruing in lakes, therefore of prime importance in maintaining water quality standards for propagation of effective lake management
    Keywords: Biology ; Limnology ; Environment ; Nigeria ; inland water environment ; lakes ; limiting factors ; nitrogen ; nutrients (mineral) ; phosphorus ; restoration
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 66-70
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    Possibility of determination of sex and gonadic stage of sturgeons using blood and morphometric indices (2018)
    Details
    Publication Date: 2021-05-19
    Description: Successful management of sturgeon population requires knowledge of stock composition with regard to sex and gonadic stage. Measurement of sex steroid concentration has proven to be a reliable and less invasive method in compare to convention methods. In this study we have examined the possible role of plasma testosterone (T), estradiol (E2), progesterone (P), cortisol (C) and morphometric parameters as indicators of sex and stage of gonadal development in immature (4-5 years old) Great sturgeon cultured in brackish water. Biometry of fishes, blood sampling from caudal vein was performed every three month and plasma was frozen until analyses. Glucose was measured with auto analyser, calcium and magnesium with spectrophotometer and sodium and potassium with film photometer, Hormone levels were measured by radio immunoassay (RIA). Histological preparation was stained with hematoxylin and eosin. In sex determination, result show that total length (L) and weight (W) had no significant elevation in different sexes and can not be used as an indicator sex determination. Among hormones only T had significant elevation, so it could be stated that level of T in immature Great sturgeon could be used to identify sex. In case of gonadic stage result show that total L and W just in male had significant correlation with gonadal stage and among hormones just T in male and C in female had significant correlation. So it could be concluded that in male and female respectively based on T and C measurement gonadic stage in immature Grate sturgeon could be identified.
    Description: Published
    Keywords: Histological ; Sex determination ; Gonadal stage ; Blood index ; Beluga ; Sturgeon ; Length ; Weight ; Calcium ; Magnesium ; Sodium ; Potassium ; Hormone ; Population ; Gonad
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.44-52
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    Survey of heavy metal (Copper, Iron, Lead, Cadmium, Zinc and Nickel) concentrations and their effects on the water quality of Anzali wetland (2017)
    Details
    Publication Date: 2021-05-19
    Description: Anzali International wetland is one of the most valuable water resources as registered in Ramsar convention with an extent of about 150 km2 in the south Caspian Sea. This wetland, not only has ecological and biological importance for migratory birds and rare fish species, but also is used for farms to discharge into the Caspian Sea through this wetland. Therefore its pollution control is very important for human life. In this study 6 elements (copper, iron, lead, zinc, cadmium and nickel ) in Anzali wetland were analyzed by Atomic Absorption spectroscopy method. . Water samples were collected from ten sampling sites seasonally and the results were compared with each other. The detection limits obtained were 0.016 ng/ml for cadmium, 0.02 ng/ml for copper (Cu), lead (Pb) and zinc (Zn), 0.025 ng/ml for iron (Fe) and 0.026 ng/ml for nickel (Ni). Relative Standard Deviation (RSD) was 1.7%. The results showed that these heavy metals were present in the water. Concentrations of Cu (0.6 mg/l) were higher than international standards reported in some stations. This can be due to industries around the wetland. The average level of heavy metals was higher in spring than in the other seasons which can be due to increase in seasonal rainfall and intensity of flow from rivers to wetland
    Description: Published
    Keywords: Survey ; Concentrations ; Atomic absorption spectroscopy ; Heavy metals ; Copper ; Iron ; Lead ; Cadmium ; Zinc ; Nickel ; Water ; Quality ; Pollution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.11-18
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    Pollution of water and bottom sediments in the coastal waters of the Black Sea off the Crimean Peninsula shore in 2017 (2019)
    Azov Sea Research Fisheries Institute (AzNIIRKH) | Rostov-on-Don, Russia
    Details
    Publication Date: 2021-05-19
    Description: The materials on the content and distribution of priority toxicants (oil pollution, heavy metals, arsenic, OCP and PCB) in water and bottom sediments in the spring-summer and summer-autumn periods of 2017 ar e presented. The results indicate that in the coastal zone of the Black Sea near the Crimean Peninsula, the highest level of oil pollution of water is recorded on all horizons along the traverse of Opuk Cape, and in the bottom sediments — along the traverse of Sarych Cape. The maximum concentration of iron and copper in water was found on the traverse of Sarych Cape, mercury and zinc — in the Feodosia Gulf. The concentrations of oil products and heavy metals found in water are not lethal for aquatic hydrobionts, but in the context of chronic pollution can significantly worsen their habitat and lead to the accumulation of toxicants. The content of organochlorine pesticides and polychlorinated biphenyls, despite the presence of these substances in the ecosystem of the basin, did not exceed the maximum permissible concentrations.
    Description: Представлены материалы по содержанию и распространению приоритетных токсикантов (нефтепродуктов, тяжелых металлов, мышьяка, ХОП и ПХБ) в воде и донных отложениях в весенне-летний и летне-осенний периоды 2017 г. Полученные результаты свидетельствуют о том, что в прибрежной зоне Черного моря у Крымского полуострова наиболее высокий уровень нефтяного загрязнения воды фиксируется на всех горизонтах по траверзу м. Опук, а в донных отложениях — по траверзу м. Сарыч. Максимальное превышение ПДК железа и меди в воде обнаружено по траверзу м. Сарыч, ртути и цинка — в Феодосийском заливе. Обнаруженные в воде концентрации нефтепродуктов и тяжелых металлов не являются летальными для водных гидробионтов, но в условиях хронического загрязнения способны значительно ухудшать среду их обитания и приводить к накоплению токсикантов. Содержание хлорорганических пестицидов и полихлорированных бифенилов, несмотря на присутствие этих веществ в экосистеме водоема, не превышало величин предельно допустимых концентраций.
    Description: Published
    Keywords: Toxicity ; Oil pollution ; Petroleum products ; Heavy metals ; Arsenic ; Polychlorinated biphenyls ; Organochlorine pesticides ; Copper ; Iron ; Zinc ; Mercury
    Repository Name: AquaDocs
    Type: Conference Material , Non Refereed
    Format: pp.250-255
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    Современное состояние гиперсоленых озер Крыма по гидрохимическим и эколого-токсикологическим показателям (2018)
    Details
    Publication Date: 2021-05-19
    Description: Исследовано качество водной среды ряда гиперсоленых рыбохозяйственных водоемов Крыма по гидрохимическим и химико-токсикологическим показателям. В течение 2015 г. были выполнены 3 комплексные экологические съемки в озерах Ленинского, Красноперекопского и Сакского районов Республики Крым (озера Кирлеутское, Акташское, Айгульское, Ойбурское, Аджибайчикское). Показано, что исследуемые озера по содержанию в водных массах нитритов и фосфатов, а оз. Аджибайчикское еще и по кислородному режиму, отнесены к высокому уровню загрязнения. Тем не менее состояние обитающих в них биоресурсов (хирономид, артемии, гаммаруса и т. д.) удовлетворительное, что подтверждает высокую адаптивность гидробионтов данных водоемов. Содержание тяжелых металлов в донных отложениях исследованных гиперсоленых озер не превышало таковых в земной коре, за исключением свинца в оз. Айгульское. Уровень загрязненности озер тяжелыми металлами по отношению к их содержанию в земной коре убывал в ряду: свинец-никель-ртуть-хром-марганец-медь-цинк-жел езо. Наибольшее сод ержание суммарных нефтепродуктов отмечено в оз. Кирлеутском, наименьшее – в оз. Акташском, однако здесь зафиксирован максимум наиболее токсичной фракции нефтепродуктов – смол и асфальтенов. В целом степень загрязнения донных отложений исследованных гипергалинных озер тяжелыми металлами и нефтепродуктами была достаточной низкой.
    Description: Water quality of several hypersaline fishery water bodies of Crimea was studied according to hydrochemical and chemicotoxicological parameters. In 2015, three complex environmental surveys were carried out in the lakes of Lenin, Krasnoperekopsk, and Saki regions of the Crimean Republic (Kyrleut, Aktash, Aygul, Oybur, Adji-Baychi L.). It has been identified that the studied lakes, based on their nitrite and phosphate content, and the Aji-Baychi L. as well, on the basis of its oxygen regimen, have high pollution levels. However, the state of biological resources (chironomids, brine shrimps, gammarids, etc.) is satisfactory, which confirms high adaptability of aquatic living organisms in these water bodies. Heavy metal content in the bottom sediments of the studied hypersaline lakes did not exceed the one in the Earth crust, except for lead in the Aygul L. The level of heavy metal contamination of lakes in relation to their content in the Earth crust decreased in the range: lead-nickel-mercury-chrome-manganese-copper-zinc-iron. The highest content of cumulative petroleum products was recorded in Kyrleut L., the lowest in Aktash L.; however, in the latter one, the maximum of the most toxic oil group, gums and asphaltenes, was recorded. In general, contamination level of the bottom sediments in the studied hypersaline lakes with heavy metals and petroleum products was sufficiently low.
    Description: Published
    Keywords: Heavy metals ; Water pollution ; Salt lakes ; Water quality ; Hydrochemistry ; Toxicology ; Environmental monitoring ; Bottom sediments ; Petroleum products ; Gums ; Zinc ; Mercury ; Chrome ; Aquatic biological resources
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.116-122
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    Methodological preconditions for organization of sea ecological monitoring in dumping area of dredged ground (2019)
    Details
    Publication Date: 2021-05-19
    Description: One of the greatest spoil dumping sites in the Black Sea is situated in the deepwater area immediately adjacent to the Kerch Strait. This fact has spurred YugNIRO to conduct, since 1988, the ecological monitoring of the marine environment in this area. Huge amounts of spoils (as much as two million metres super(3) were dumped in 1989) come from the regularly dredged Kerch-Enikale Channel more than 30 km long, passing throughout the Kerch Strait, and from harbours. The range of chemical parameters to be determined from the marine monitoring generally includes the loads of biogenic elements (phosphates, silica acid, nitrogen in various forms), heavy metals (mercury, lead, cadmium, chromium, zinc, and others) oil components (fractional and overall compositions), organochlorines, detergents, synthetic surfactants. These parameters were determined in the water, bottom sediments, and in the marine flora and fauna. An average value of total oil content of marine sediment has surpassed biochemical background by a factor of 2.3. The dumping of polluted dredging spoils is responsible for the formation of a local zone some 53 km super(2) in area around the dumping ground, in which the drastic effect on marine life, especially on bottom communities has been revealed. Species diversity in the area has been reduced and macrobenthos communities utterly destroyed; the young of polychaetes and of bivalves being the first to have suffered.
    Description: Наблюдения в районе глубоководного отвала проводятся систематически как в период осуществления дампинга грунтов, так и в промежутках между выполняемыми дноуглубительными работами. В целях идентификации ареала распространения грунтов, сброшенных в глубоководный отвал, проводится химический анализ донных отложений на акватории, подлежащей дноуглублению. Характерный набор загрязняющих веществ и их соотношения позволяют оценить вклад каждого дноуглубителя на фоне общего изменения концентраций загрязняющих веществ не только в воде, но и в донных отложениях района дампинга грунтов. Набор химических параметров, определяемых в процессе мониторинга, как правило, включает в себя биогенные элементы (фосфаты, кремнекислота, формы азота), тяжёлые металлы (ртуть, свинец, кадмий, хром, цинк и др.), компоненты нефти (фракционный и суммарный состав), хлорорганические соединения, детергенты, СПАВ. Определение этих токсикологических параметров производится в воде, донных отложениях и гидробионтах. В настоящее время в пространственном распределении зона токсичных для гидробионтов тяжёлых металлов приурочена к центральной точке сброса, юго-восточной и северо-западной периферии подводного отвала.
    Description: Published
    Keywords: Dumping ; Dredging ; Ports ; Environmental monitoring ; Heavy metals ; Aquatic communities ; Benthos ; Zinc ; Bottom sediments ; Mercury ; Lead ; Cadmium ; Тяжелые металлы ; Порты ; Свинец ; Драгирование ; Дампинг
    Repository Name: AquaDocs
    Type: Journal Contribution , Non Refereed
    Format: pp.36-37
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    Heavy metals Cu, Zn, Cd and Pb in tissue, liver of Esox lucius and sediment from the Anzali international lagoon- Iran (2017)
    Details
    Publication Date: 2021-05-19
    Description: Levels of contaminants in fish are of particular interest because of the potential risk to humans consuming them. This paper examines the levels of cadmium, lead, zinc and copper in liver and muscle tissue of Esox lucius and in sediments from the Anzali international wetland in Iran. The wetland is a nursery and feeding habitat for fish species both from the lagoon and the Caspian Sea, which are consumed by the local inhabitants and others. Eleven main rivers discharge agricultural, industrial, urban and municipal wastes into this wetland. Twenty five Esox lucius specimens, with a mean weight of 804.6±121g and mean length of 430.7± 2mm were collected from the wetland by multimesh gill nets in September and December 2007.. The age was determined from scale samples according to the annual ring structure. Average concentrations of Cd, Cu, Pb and Zn accumulated in the mid-dorsal muscle tissue (filleted and skinned) of fish were 0.001, 0.21±0.02, 0.13±0.01 and 2.55±0.18 µg.g-1, respectively. The concentrations of these metals in liver samples were Cd: 0.0014± Cu: 0.96± 0.61, Pb: 0.11 ± 0.04 and Zn: 2.46±1.5 µg.g-1. Significant positive correlations were detected between Zn and Cu with body weight, while negative correlations were found between Pb and body weight. The concentrations of Zn, Cu and Cd were below the maximum allowable concentrations for fish proposed by WHO and MAFF (safe for human consumption) but concentration of Pb exceeded the standard levels.
    Description: Published
    Keywords: Esox lucius ; Tissue ; Levels ; Heavy metals ; Cadmium ; Zinc ; Lead ; Copper ; Liver
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-8
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    Assessment of water and bottom sediment pollution with heavy metals and arsenic in the Caucasus Region of the Black Sea at the present time (2020)
    Details
    Publication Date: 2021-05-19
    Description: The content of nine heavy metals (Fe, Mn, Zn, Cr, Cu, Pb, Cd, Hg, Ni) and arsenic in the water and bottom sediments of the North-Eastern Black Sea at the present time (2018–2019) has been estimated, and the results of this investigation are presented. The analyses of samples, collected during the multi-purpose expeditions of the Azov-Black Sea Branch of the FSBSI “VNIRO” (“AzNIIRKH”) in the spring – early summer and summer – early autumn seasons, are summarized. Altogether, 204 water samples and 60 bottom sediment samples have been collected. Estimation of mass concentrations of heavy metals and arsenic has been conducted according to the methods, developed and adopted by the Azov-Black Sea Branch of the FSBSI “VNIRO” (“AzNIIRKH”). Pollution levels in the habitat of aquatic living resources have been assessed based on the standards for maximum allowable concentrations (MAC) of harmful substances in water bodies of fisheries importance and on the average long-term values. In some areas, subjected to the increased anthropogenic pressure, exceedance in MAC of iron, manganese, zinc, and nickel is recorded. It is shown that, at present, the revealed content of heavy metals and arsenic in the water and bottom sediments of the investigated area of the Caucasus Region of the Black Sea does not pose a threat for the aquatic living resources.
    Description: Приведены результаты исследований содержания девяти тяжелых металлов (Fe, Mn, Zn, Cr, Cu, Pb, Cd, Hg, Ni) и мышьяка в воде и донных отложениях северо-восточной части Черного моря в современный период (2018–2019 гг.). Обобщены результаты анализа проб, отобранных в ходе комплексных экспедиций в весенне-раннелетний и летне-раннеосенний периоды. Всего отобрано и проанализировано 204 пробы воды и 60 проб донных отложений. Определение массовых концентраций тяжелых металлов и мышьяка проведено в соответствии с методиками, принятыми и разработанными в Азово-Черноморском филиале ФГБНУ «ВНИРО» («АзНИИРХ»). Оценены уровни загрязненности среды обитания водных биологических ресурсов в соответствии с нормативами предельно допустимых концентраций (ПДК) вредных веществ в морских водах рыбохозяйственного значения и среднемноголетними показателями. В отдельных районах, подверженных повышенной антропогенной нагрузке, зафиксировано превышение ПДК железа, марганца, цинка и никеля. Показано, что обнаруженные концентрации тяжелых металлов и мышьяка в воде и донных отложениях обследованной акватории Кавказского района Черного моря в целом не представляют опасности для водных биологических ресурсов в настоящее время.
    Description: Published
    Keywords: Heavy metals ; Bottom sediments ; Iron ; Manganese ; Zinc ; Nickel ; Arsenic ; Anthropogenic effects ; Methodology ; Aquatic living resources ; Water sampling ; Водные живые ресурсы ; Антропогенное влияние ; Никель ; Цинк ; Марганец ; Мышьяк ; Пробы воды ; Методика ; Донные отложения
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.7-16
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    Study of the content of heavy metals in fish (2018)
    Azov Sea Research Fisheries Institute (AzNIIRKH) | Rostov-on-Don, Russia
    Details
    Publication Date: 2021-05-19
    Description: Features of distribution of heavy metals in muscles, gills, liver, scales and heart of the fish, cultivated in a recirculating aquaculture system, are presented.
    Description: Показаны особенности распределения тяжелых металлов в мышцах, жабрах, печени, чешуе и сердце рыбы, выращенной в установке с замкнутым циклом водоснабжения.
    Description: Published
    Keywords: Fish culture ; Heavy metals ; Animal organs ; Liver ; Gills ; Fish scales ; Lead ; Copper ; Iron ; Zinc ; Recirculating systems
    Repository Name: AquaDocs
    Type: Conference Material , Non Refereed
    Format: pp.25-27
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  • 60
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    Состояние качества водной среды и донных отложений озера Донузлав в современный период (2018)
    Details
    Publication Date: 2021-05-19
    Description: Analysis of hydrochemical, chemical and toxicological features of water and bottom sediments in Lake Donuzlav (Crimea, Russia) according to the results of environmental monitorings conducted by the Kerch Branch of FSBSI “AzNIIRKH”, as well as according to the historical data collected by YugNIRO (Southern Scientific Research Institute of Fisheries and Oceanography) since 2000, is presented for the period from 2015 to 2017. Estimations of oxygen content in water, as well as BOD5 (biochemical oxygen demand) and the content of biogenic elements were made using standard practices, of heavy metals — using the method of atomic absorption spectrophotometry, of petroleum hydrocarbons – the method of infrared spectrophotometry. It is found out that the oxygen regimen of the southern Donuzlav L. was satisfactory for hydrobionts: the average annual contents of the dissolved oxygen varied within the range of 8.77–9.40 mg/l. It is shown that seasonal variations of the biogenic elements content are mainly predetermined by natural factors. In general, water aeration was good; however, the oxygen regimen was influenced by anthropogenic pressure, which resulted in relatively low dependency between oxygen saturation and water temperature. The long-term dynamics of the content of heavy metals and petroleum hydrocarbons in the water and bottom sediments of Lake Donuzlav is given. At present, the level of water pollution with heavy metals and petroleum hydrocarbons is rather low; however, there is a risk of aggravation of anthropogenic pressure impact on Lake Donuzlav ecosystem, which is evidenced by peak concentrations of some contaminants, observed in recent years. The increasing trend in mercury, copper and zinc content in the bottom sediments of the southern Lake Donuzlav is shown, as well as the decreasing trend in the content of iron, manganese, lead, chrome and petroleum hydrocarbons. The level of bottom sediments pollution in the central part of the lake is higher in comparison with its other areas, which is preconditioned by a higher sorption capacity of the bottom soil, containing high amount of fine particle fraction.
    Description: Дан анализ гидрохимических и химико-токсикологических характеристик акватории озера Донузлав по результатам мониторинговых исследований Керченского филиала ФГБНУ «АзНИИРХ» за период 2015–2017 гг., а также ретроспективным данным ЮгНИРО (Южный научно-исследовательский институт морского рыбного хозяйства и океанографии) с 2000 г. Определение содержания в воде кислорода, БПК5 (биохимическое потребление кислорода), биогенных элементов осуществлялось по стандартным методикам, тяжелых металлов – методом атомно-адсорбционной спектрофотометрии, нефтеуглеводородов — инфракрасной спектрометрии. Показано, что кислородный режим южной части оз. Донузлав был удовлетворительным для жизнедеятельности гидробионтов: среднегодовое содержание растворенного в воде кислорода изменялось в пределах 8,77–9,40 мг/л. Сезонные изменения содержания биогенных элементов в значительной степени определяются природными факторами. Представлена многолетняя динамика содержания тяжелых металлов и нефтеуглеводородов в воде и донных отложениях оз. Донузлав. На современном этапе степень загрязнения водной среды озера тяжелыми металлами и нефтеуглеводородами достаточно низкая, однако существует угроза увеличения последствий антропогенной нагрузки на экосистему оз. Донузлав, о чем свидетельствуют максимальные концентрации некоторых загрязняющих веществ, наблюдаемые в последние годы. Показана тенденция увеличения содержания в донных отложениях южной части оз. Донузлав ртути, меди, цинка и снижения концентрации железа, марганца, свинца, хрома и нефтеуглеводородов. Уровень загрязнения донных отложений срединной части озера выше по сравнению с другими участками акватории, что обусловлено более высокой сорбционной способностью грунта, содержащего большее количество мелкодисперсной фракции.
    Description: Published
    Keywords: Bottom sediments ; Chemical composition ; Toxicology ; Long-term data ; Environmental monitoring ; Copper ; Mercury ; Zinc ; Dissolved oxygen ; Heavy metals ; Petroleum products ; Lead ; Iron ; Marine pollution ; ASFA_2015::M::Marine pollution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.32-38
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    Spatial mapping of sedimentary contaminants in the Baltimore Harbor/Patapsco river/Back river system (2021)
    University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/2883 | 130 | 2011-09-29 18:17:42 | 2883 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Details
    Publication Date: 2021-06-29
    Description: Primary objective was to map concentrations of target contaminants in the surfacial sediments. Secondary objectives included: characterization of potential sites for sediment capping demonstration projects, further characterization of sediment depositional and accumulation patterns, and estimation of historical contaminant inventories through sediment geochronology. (PDF contains 112 pages)
    Description: Maryland Department of the Environment
    Keywords: Ecology ; Pollution ; Environment ; Chemistry ; Polychlorinated biphenyls ; Polycyclic aromatic hydrocarbons ; organochlorine pesticides ; Mercury ; Methylmercury ; Nitrogen ; Sulfur ; Trace metals ; toxic effects ; Chesapeake Bay ; Baltimore Harbor ; Patapsco river ; Back river ; Maryland ; carbon ; PCB ; Cadmium ; Chromium ; Nickel ; Copper ; Zinc
    Repository Name: AquaDocs
    Type: monograph
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    Buzzards Bay Water Quality Data from the Buzzards Bay Coalition’s Baywatchers Program 1992-2018 August 2020 version (2020)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2020-08-28
    Description: The Buzzards Bay Coalition’s Baywatchers Monitoring Program collected summertime water quality information at more than 150 stations around Buzzards Bay, Massachusetts from 1992 to 2018. Baywatchers monitoring data document nutrient-related water quality and the effects of nitrogen pollution. The large majority of stations are located in sub-estuaries of the main Bay, although stations in central Buzzards Bay and Vineyard Sound were added beginning in 2007. Measurements include temperature, salinity, Secchi depth and concentrations of dissolved oxygen, ammonium, nitrate + nitrite, total dissolved nitrogen, particulate organic nitrogen, particulate organic carbon, ortho-phosphate, chlorophyll a, pheophytin a, and in lower salinity waters, total phosphorus and dissolved organic carbon. The Baywatchers dataset provides a long-term record of the water quality of Buzzards Bay and its sub-estuaries. The data have been used to identify impaired waters, evaluate discharge permits, support the development of nitrogen total maximum daily loads, develop strategies for reducing nitrogen inputs, and increase public awareness and generate support for management actions to control nutrient pollution and improve water quality. The Readme, STN_EQUIV, Stations and Methods, S_D for WFH, and Acknowledge tabs were updated and corrections were made for Time and POC on 2018 Upper Bay samples and deleted CH1 from sonde method column where no CHL data existed, moved words like "sample lost" from Chl and Pheo data columns to comments column.
    Keywords: water quality ; Buzzards Bay ; nitrogen ; eutrophication ; coastal ; citizen science
    Repository Name: Woods Hole Open Access Server
    Type: Dataset
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    Buzzards Bay Water Quality Data from the Buzzards Bay Coalition’s Baywatchers Program 1992-2018 December 2020 version (2020)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2020-12-11
    Description: The Buzzards Bay Coalition’s Baywatchers Monitoring Program collected summertime water quality information at more than 150 stations around Buzzards Bay, Massachusetts from 1992 to 2018. Baywatchers monitoring data document nutrient-related water quality and the effects of nitrogen pollution. The large majority of stations are located in sub-estuaries of the main Bay, although stations in central Buzzards Bay and Vineyard Sound were added beginning in 2007. Measurements include temperature, salinity, Secchi depth and concentrations of dissolved oxygen, ammonium, nitrate + nitrite, total dissolved nitrogen, particulate organic nitrogen, particulate organic carbon, ortho-phosphate, chlorophyll a, pheophytin a, and in lower salinity waters, total phosphorus and dissolved organic carbon. The Baywatchers dataset provides a long-term record of the water quality of Buzzards Bay and its sub-estuaries. The data have been used to identify impaired waters, evaluate discharge permits, support the development of nitrogen total maximum daily loads, develop strategies for reducing nitrogen inputs, and increase public awareness and generate support for management actions to control nutrient pollution and improve water quality. The Readme, STN_EQUIV, Stations and Methods, S_D for WFH, and Acknowledge tabs were updated and corrections were made for Time and POC on 2018 Upper Bay samples and deleted CH1 from sonde method column where no CHL data existed, moved words like "sample lost" from Chl and Pheo data columns to comments column.
    Keywords: water quality ; Buzzards Bay ; nitrogen ; eutrophication ; coastal ; citizen science
    Repository Name: Woods Hole Open Access Server
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    Effects of dietary phosphorus and zinc levels on growth artd bone mineralization in fingerlings of rainbow trout, Oncorhynchus mykiss (2021)
    In:  http://aquaticcommons.org/id/eprint/17645 | 9 | 2015-09-11 14:42:34 | 17645 | Bangladesh Fisheries Research Institute
    Details
    Publication Date: 2021-06-26
    Description: A laboratory based 2 x 2 factorial experiment was conducted to investigate theinfluences of dietary phosphorus and zinc levels on growth and bone mineralization infingerlings of rainbow trout for 21 weeks. Two levels of phosphorus (19 and 30 mg/g)and two levels of zinc (55 and 103 Ag/g) in the dry diets were tested. Duplicate tanks of30 rainbow trout (average weight 1.56 ± 0.24 g) per 60L glass tank were fedexperimental diets three times a day to apparent satiation level at 15 to 24°C watertemperature. The results of the present study demonstrated that dietary phosphorussupplementation influenced the growth and bone mineralization whereas zinc levelssignificantly (p〈0.05) influenced bone mineralization in rainbow trout. Furtherinvestigations in this area with different size and age groups of this fish are broadlyneeded.
    Keywords: Biology ; Fisheries ; Phosphorus ; Zinc ; Bone mineralization ; Rainbow trout
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    A survey on the quality of Indian fish meal of commerce (2021)
    In:  http://aquaticcommons.org/id/eprint/18262 | 12051 | 2015-10-18 07:20:11 | 18262 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-07
    Description: Data on proximate composition, total volatile bases, total non-protein nitrogen and bacterial quality of commercial samples of Indian fish meal are presented in this communication. The samples vary very much in quality depending on the type of raw material used and method of processing followed. The data are discussed in relation to the Indian standard Specifications for fish meal as livestock feed.
    Keywords: Fisheries ; fish meal ; chemical composition ; microbial contamination ; nitrogen ; Sardinella longiceps
    Repository Name: AquaDocs
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    Nutrient salts in the United Arab Emirates waters (the Arabian Gulf and the Gulf of Oman) (2021)
    In:  http://aquaticcommons.org/id/eprint/19030 | 12051 | 2015-12-11 11:56:58 | 19030 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-13
    Description: This paper deals with the levels and distributions of nutrient salts in the United Arab Emirates waters. Water samples were collected bimonthly during 1994-1995 from the marine environment of the United Arab Emirates, which extends more than 800km along the Arabian Gulf and the Gulf of Oman. Concentrations of ammonium, nitrite, nitrate, phosphate, silicate, as well as total concentrations of total dissolved nitrogen, phosphorus, and silicon in the area were scattered in the ranges: (ND-6.32; mean: 0.84 µg-at N/l), ND-3.02; mean: 0.42 µg-at N/l), (ND-10.88; mean: 1.18 µg-at N/1), (ND-4.22; mean: 0.62 µg-at P/l), (1.14-28.80; mean: 6.52 µg-at Si/l), (1.52-39.58; mean: 12.28 µg-at N/l), (0.40-4.98; mean: 1.07 µg-at P/l), and (2.77-44.74; mean: 13.02 Si/l) respectively. Of inorganic nitrogen species, ammonium was the highest in the Arabian Gulf waters and nitrate was the highest at the Gulf of Oman. The dissolved inorganic nitrogen total species, phosphate and silicate amounted to 16.4, 47.6, 56.5% respectively, of the concentrations of nitrogen, phosphorus and silicon in the Arabian Gulf and 22.6, 64.4, 44.9% respectively, in the Gulf of Oman, indicating that more than 80% of nitrogen was present in organic forms. Distributions of nutrient in the two regions were higher in the summer season and lower in the winter season due to the oxidation of organic materials. Regional distributions revealed higher values for nitrite (1.3 times), nitrate (2.8 times), phosphate (2.2 times), total dissolved nitrogen (1.3 times), total dissolved phosphorus (1.6 times), and total dissolved silicon (1.3 times) in the Gulf of Oman compared to the Arabian Gulf, indicating more oligotrophic conditions at the Arabian Gulf Whereas no distinct patterns of distribution were observed in the Arabian Gulf waters, an increase in the seaward direction was measured at the Gulf of Oman. Vertical distributions indicated a general increase with depth in the two regions. The mean ratios for total concentrations of phosphorus, nitrogen, and silicon in the Arabian Gulf (1: 11.6: 12.6) and the Gulf of Oman (1: 10.1: 11.8) were lower than the Redfield ratio.
    Keywords: Biology ; Chemistry ; nutrient salts ; nitrite ; nitrate ; phosphate ; silicate ; nitrogen ; phosphorus ; silicon ; sea waters ; Arabian Gulf ; Gulf of Oman
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    Opal (Zn/Si) ratios as a nearshore geochemical proxy in coastal Antarctica (2011)
    American Geophysical Union
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 23 (2008): PA2218, doi:10.1029/2007PA001576.
    Description: During the last 50 years, the Antarctic Peninsula has experienced rapid warming with associated retreat of 87% of marine and tidewater glacier fronts. Accelerated glacial retreat and iceberg calving may have a significant impact on the freshwater and nutrient supply to the phytoplankton communities of the highly productive coastal regions. However, commonly used biogenic carbonate proxies for nutrient and salinity conditions are not preserved in sediments from coastal Antarctica. Here we describe a method for the measurement of zinc to silicon ratios in diatom opal, (Zn/Si)opal, which is a potential archive in Antarctic marine sediments. A core top calibration from the West Antarctic Peninsula shows (Zn/Si)opal is a proxy for mixed layer salinity. We present down-core (Zn/Si)opal paleosalinity records from two rapidly accumulating sites taken from nearshore environments off the West Antarctic Peninsula which show an increase in meltwater input in recent decades. Our records show that the recent melting in this region is unprecedented for over 120 years.
    Description: The work was funded as part of NERC Antarctic Funding Initiative AFI4– 02. K.R.H. is funded by NERC grant NER/S/A/2004/12390.
    Keywords: Opal ; Zinc ; Salinity
    Repository Name: Woods Hole Open Access Server
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    Assessing the potential for Zn limitation of marine primary production: proteomic characterization of the low Zn stress response in marine diatoms (2022)
    Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-10-20
    Description: Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Chemical Oceanography at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution May 2022.
    Description: Marine diatoms are abundant photoautotrophic algae that contribute significantly to photosynthetic carbon fixation and export throughout the oceans. Zinc is an important micronutrient in algal metabolism, with scarce dissolved concentrations in the upper euphotic zone reflecting high biological demand. In this thesis, I investigated the response of marine diatoms to Zn scarcity to characterize metabolic mechanisms used to combat Zn stress. I began by assaying the ability to metabolically substitute cobalt (Co) in place of Zn in four diatom species and found that enhanced abilities to use Co are likely an adaptation to high surface dCo:dZn ratios in the native environment. I next demonstrated that Zn/Co metabolic substitution in diatoms is not universal using culture studies of Chaetoceros neogracile RS19, which has an absolute Zn requirement. Using global proteomic analysis, I then identified and characterized diatom ZCRP-A and ZCRP-B, a putative Zn-chaperone and membrane-tethered Zn acquisition protein, respectively, as two proteins involved in the low-Zn response. I demonstrated that these proteins are widespread in marine phytoplankton and can be deployed as protein biomarkers of Zn stress in the field. I furthermore documented both the detection of ZCRPs in the Southern Ocean and the existence of Zn/Fe co-limitation within the natural phytoplankton population in Terra Nova Bay, demonstrating that Zn co-limitation can indeed occur in the field, even in high macronutrient waters. Lastly, I explored the relative demand of Zn and cadmium (Cd) within the Southern Ocean community using stable 67Zn and 110Cd tracers, documenting a high demand for both metals during the austral 2017-2018 summer season and investigating the cycling of these elements within this important region. Overall, this dissertation provides new information regarding Zn acquisition and homeostasis mechanisms within marine algae and demonstrates that Zn co-limitation in the field is not only possible, but detectable via protein biomarkers.
    Description: I am very fortunate to have been financially supported over the course of my PhD by awards granted to the Saito Lab, specifically by National Institutes of Health (NIH) grant R01GM135709, Gordon and Betty Moore Foundation grant 3782, and National Science Foundation (NSF) grants OCE-1657766, OCE-1658030, OCE-1736599, OCE-1850719, and OCE-1924554.
    Keywords: Zinc ; Diatoms ; Proteomic
    Repository Name: Woods Hole Open Access Server
    Type: Thesis
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    Cellular magnesium acquisition : an anomaly in embryonic cation homeostasis (2007)
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © The Author(s), 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Experimental and Molecular Pathology 83 (2007): 224-240, doi:10.1016/j.yexmp.2007.03.007.
    Description: The intracellular dominance of magnesium ion makes clinical assessment difficult despite the critical role of Mg++ in many key functions of cells and enzymes. There is general consensus that serum Mg++ levels are not representative of the growing number of conditions for which magnesium is known to be important. There is no consensus method or sample source for testing for clinical purposes. High intracellular Mg++ in vertebrate embryos results in part from interactions of cations which influence cell membrane transport systems. These are functionally competent from the earliest stages, at least transiently held over from the unfertilized ovum. Kinetic studies with radiotracer cations, osmolar variations, media lacking one or more of the four biological cations, Na+, Mg++, K+, and Ca++, and metabolic poison 0.05 mEq/L NaF, demonstrated: (1) all four cations influence the behavior of the others, and (2) energy is required for uptake and efflux on different time scales, some against gradient. Na+ uptake is energy dependent against an efflux gradient. The rate of K+ loss is equal with or without fluoride, suggesting a lack of an energy requirement at these stages. Ca++ efflux took twice as long in the presence of fluoride, likely due in part to intracellular binding. Mg++ is anomalous in that early teleost vertebrate embryos have an intracellular content exceeding the surrounding sea water, an isolated unaffected yolk compartment, and a clear requirement for energy for both uptake and efflux. The physiological, pathological, and therapeutic roles of magnesium are poorly understood. This will change: (1) when 28Mg is once again generally available at a reasonable cost for both basic research and clinical assessment, and (2) when serum or plasma levels are determined simultaneously with intracellular values, preferably as part of complete four cation profiles. Atomic absorption spectrophotometry, energy-dispersive x-ray analysis, and inductively coupled plasma emission spectroscopy on sublingual mucosal and peripheral blood samples are potential methods of value for coordinated assessments.
    Description: AEC Grant No. 1343
    Keywords: Magnesium ; Cation transporters ; Effect of fluoride on metabolism ; Early embryo homeostasis ; Yolk ion partition ; Ionic competition ; Sodium ; Potassium ; Calcium ; Teleost embryos ; Fundulus heteroclitus ; Analytic methodology
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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    Incubation experiments were conducted in St. John, US Virgin Islands to investigate the macronutrient drawdown response of reef seawater microbial communities to exudates released from the coral species Porites astreoides and Gorgonia ventalina. (2022)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publication Date: 2022-11-10
    Description: Dataset: Exudate Uptake Incubations - Macronutrient Data
    Description: Incubation experiments were conducted in St. John, US Virgin Islands to investigate the composition of exudates released from different species of benthic organisms, and the response of reef seawater microbial communities to mixed exudates released from different species and to specific metabolites. Exudates were collected from the stony coral Porites astreoides, and the octocoral Gorgonia ventalina after an 8 hour incubation. Reef seawater microbial communities were incubated separately in the presence of exudates from P. astreoides and G. ventalina for 48 hours and samples were collected to monitor changes in macronutrient concentrations. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/865193
    Description: NSF Division of Ocean Sciences (NSF OCE) OCE-1736288
    Keywords: coral reef ; Dissolved Organic Macronutrients ; Dissolved Inorganic Macronutrients ; Organic Carbon ; nitrogen ; biogeochemistry
    Repository Name: Woods Hole Open Access Server
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  • 71
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    Measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program North Atlantic Survey (NAS) (2023)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publication Date: 2023-02-28
    Description: Dataset: Elemental and isotopic noble gas ratios and N2/Ar from the North Atlantic: TTO data
    Description: This dataset includes measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program. These data were used, along with new observations of heavy noble gas ratios (elemental and isotopic ratios) from the Bermuda Atlantic Time-series (BATS) on cruise 10391 (30 April 2022 - 05 May 2022), to model simulations of these tracers using the Transport Matrix Method (TMM). Together these new measurements and model simulations provide insight into physical processes governing gas exchange in the high-latitude regions of North Atlantic Deep Water formation, and a comparison of physical simulations of N2/Ar ratios to observations in TTO samples reveals excess N2 that arises from benthic denitrification in the deep North Atlantic. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/890427
    Description: NSF Division of Ocean Sciences (NSF OCE) OCE-2122427, NSF Division of Ocean Sciences (NSF OCE) OCE-1923915
    Keywords: noble gas ; North Atlantic ; nitrogen ; gas exchange
    Repository Name: Woods Hole Open Access Server
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  • 72
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    Elemental and isotopic noble gas ratios from the Bermuda Atlantic Time-series (BATS) on cruise 10391 on R/V Atlantic Explorer (AE2208) from 30 April 2022 to 05 May 2022 (2023)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publication Date: 2023-02-28
    Description: Dataset: Elemental and isotopic noble gas ratios and N2/Ar from the North Atlantic: BATS data
    Description: This dataset includes new observations of heavy noble gas ratios (elemental and isotopic ratios) from the Bermuda Atlantic Time-series (BATS) on cruise 10391 on R/V Atlantic Explorer (AE2208) from 30 April 2022 - 05 May 2022. These data were used, along with measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples from the Transient Tracers in the Ocean (TTO) program, to model simulations of these tracers using the Transport Matrix Method (TMM). Together these new measurements and model simulations provide insight into physical processes governing gas exchange in the high-latitude regions of North Atlantic Deep Water formation, and a comparison of physical simulations of N2/Ar ratios to observations in TTO samples reveals excess N2 that arises from benthic denitrification in the deep North Atlantic. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/890342
    Description: NSF Division of Ocean Sciences (NSF OCE) OCE-2122427, NSF Division of Ocean Sciences (NSF OCE) OCE-1923915
    Keywords: noble gas ; North Atlantic ; nitrogen ; gas exchange
    Repository Name: Woods Hole Open Access Server
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  • 73
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    Model simulations of elemental and isotopic heavy noble gas ratios using the Transport Matrix Method (TMM) (2023)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publication Date: 2023-02-28
    Description: Dataset: Elemental and isotopic noble gas ratios and N2/Ar from the North Atlantic: model simulations
    Description: This dataset includes model simulations of the following tracers using the Transport Matrix Method (TMM): (i) new observations of heavy noble gas ratios (elemental and isotopic ratios) from the Bermuda Atlantic Time-series (BATS) on cruise 10391 (30 April 2022 - 05 May 2022), and (ii) measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program. Together these measurements and model simulations provide insight into physical processes governing gas exchange in the high-latitude regions of North Atlantic Deep Water formation, and a comparison of physical simulations of N2/Ar ratios to observations in TTO samples reveals excess N2 that arises from benthic denitrification in the deep North Atlantic. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/890293
    Description: NSF Division of Ocean Sciences (NSF OCE) OCE-2122427, NSF Division of Ocean Sciences (NSF OCE) OCE-1923915
    Keywords: noble gas ; North Atlantic ; nitrogen ; gas exchange
    Repository Name: Woods Hole Open Access Server
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  • 74
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    Differences in metallothionein gene expression in primary cultures of rainbow trout hepatocytes and the RTH-149 cell line
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 1049 (1990), S. 78-82 
    Details
    ISSN: 0167-4781
    Keywords: 17β-Oestradiol ; Corticosterone ; Cortisol ; Fish ; Gene expression ; Metallothionein mRNA ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4781(90)90086-H
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  • 75
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    Metallothionein mRNA stability in chicken and mouse cells
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 1090 (1991), S. 223-229 
    Details
    ISSN: 0167-4781
    Keywords: (Chicken) ; (Mouse) ; Cadmium ; Metallothionein ; Spermatogenic cell ; Zinc ; mRNA half-life
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0167-4781(91)90105-U
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  • 76
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    Short-term starvation effects on nitrogen and phosphorus excretion by the chaetognath Sagitta enflata
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 13 (1981), S. 691-700 
    Details
    ISSN: 0302-3524
    Keywords: Chaetognatha ; Hawaii coast ; excretion ; nitrogen ; phosphorus ; starvation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(81)80050-3
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  • 77
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    Effects of canopy removal and nitrogen enrichment on a Distichlis spicata-edaphic diatom complex
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 13 (1981), S. 119-129 
    Details
    ISSN: 0302-3524
    Keywords: Mississippi ; community composition ; diatoms ; fertilization ; light intensity ; nitrogen ; salt marshes ; species diversity
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(81)80070-9
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  • 78
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    Dynamics of carbon and nitrogen during the decomposition of detritus derived from estuarine macrophytes
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 13 (1981), S. 681-690 
    Details
    ISSN: 0302-3524
    Keywords: carbon ; detritus ; macrophytic algae ; nitrogen
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(81)80049-7
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  • 79
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    Sedimentation of newly produced particulate organic matter in a subtropical inlet, Kaneohe Bay, Hawaii
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 14 (1982), S. 533-544 
    Details
    ISSN: 0302-3524
    Keywords: Hawaii ; carbon ; chlorophylls ; nitrogen ; sedimentation ; suspended sediments ; wind
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(82)80075-3
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  • 80
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    Tidal resuspension in Buzzards Bay, Massachusetts
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 11 (1980), S. 9-16 
    Details
    ISSN: 0302-3524
    Keywords: Buzzards Bay ; carbon ; detritus ; nitrogen ; nutrients ; seston ; zooplankton
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(80)80025-9
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  • 81
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    Organic nitrogen and caloric content of detritus
    Amsterdam : Elsevier
    Estuarine and Coastal Marine Science 14 (1982), S. 325-336 
    Details
    ISSN: 0302-3524
    Keywords: caloric content ; detritus ; microbial activity ; nitrogen ; nutrition
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0302-3524(82)80020-0
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  • 82
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    Absorption and bioavailability studies of mineral nutrients by mass spectrometry
    Amsterdam : Elsevier
    Analytica Chimica Acta 283 (1993), S. 190-198 
    Details
    ISSN: 0003-2670
    Keywords: Calcium ; Isotope ratio measurements ; Mass spectrometry ; Mineral nutrients ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85222-6
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  • 83
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    Conditional stability constants of metal complexes of organic ligands in sea water: past and present, and a simple coordination chemistry model
    Amsterdam : Elsevier
    Analytica Chimica Acta 284 (1994), S. 621-634 
    Details
    ISSN: 0003-2670
    Keywords: Conditional stability constants ; Coordination chemistry ; Copper ; Metal complexes ; Organic ligands ; Sea water ; Speciation ; Stability constants ; Trace m etals ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(94)85067-4
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  • 84
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    Flow-injection determination of traces of potassium by extraction with bis[2-(5'-bromo-2'-pyridylazo)-5-(N-propyl-N-sulphopropylamino)phenolato]cob altate(III) and cryptand[2.2.2]
    Amsterdam : Elsevier
    Analytica Chimica Acta 281 (1993), S. 95-101 
    Details
    ISSN: 0003-2670
    Keywords: Biological samples ; Extraction ; Flow injection ; Potassium
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85343-I
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  • 85
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    Determination of zinc in aluminium metal by sequential metal vapour elution analysis
    Amsterdam : Elsevier
    Analytica Chimica Acta 285 (1994), S. 53-56 
    Details
    ISSN: 0003-2670
    Keywords: Aluminium ; Atomic absorption spectrometry ; Sequential metal vapour elution ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(94)85007-0
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  • 86
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    Chromatographic behaviour of 2-(2-pyridylazo)-5-[N-(sulphoalkyl)amino]phenol chelates on hydrophobic stationary phases
    Amsterdam : Elsevier
    Analytica Chimica Acta 252 (1991), S. 181-186 
    Details
    ISSN: 0003-2670
    Keywords: Cobalt ; Copper ; Iron ; Liquid chromatography ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(91)87213-Q
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  • 87
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    Polarographic determination of total iron, iron(II) and iron(III) in zinc plant electrolyte
    Amsterdam : Elsevier
    Analytica Chimica Acta 277 (1993), S. 145-151 
    Details
    ISSN: 0003-2670
    Keywords: Iron ; Plant electrolyte ; Polarography ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85099-6
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  • 88
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    Flow-injection flame atomic absorption spectrometry for slurry atomization. Determination of calcium, magensium, iron, zinc and manganese in vegetables
    Amsterdam : Elsevier
    Analytica Chimica Acta 283 (1993), S. 393-400 
    Details
    ISSN: 0003-2670
    Keywords: Atomic absorption spectrometry ; Calcium ; Flow injection ; Iron ; Magnesium ; Manganese ; Vegetables ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85249-J
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  • 89
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    Preservation of shelf life of enzyme based analytical systems using a combination of sugars, sugar alcohols and cationic polymers or zinc ions
    Amsterdam : Elsevier
    Analytica Chimica Acta 279 (1993), S. 185-192 
    Details
    ISSN: 0003-2670
    Keywords: Enzymatic methods ; Polymers ; Sugars ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85082-U
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  • 90
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    Rapid adsorptive cathodic stripping voltammetry of zinc complexes in sea water
    Amsterdam : Elsevier
    Analytica Chimica Acta 284 (1993), S. 405-411 
    Details
    ISSN: 0003-2670
    Keywords: Sea water ; Stripping voltammetry ; Waters ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85326-F
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  • 91
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    Zinc speciation in lake waters and its determination by ligand exchange with EDTA and differential pulse anodic stripping voltammetry
    Amsterdam : Elsevier
    Analytica Chimica Acta 284 (1994), S. 505-515 
    Details
    ISSN: 0003-2670
    Keywords: Differential pulse voltammetry ; Metal speciation ; Stripping voltammetry ; Waters ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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  • 92
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    On-line monitoring of cobalt ion zinc plant electrolyte by differential pulse adsorptive stripping voltammetry
    Amsterdam : Elsevier
    Analytica Chimica Acta 281 (1993), S. 281-290 
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    ISSN: 0003-2670
    Keywords: Cobalt ; Differential pulse polarography ; On-line monitoring ; Stripping voltammetry ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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    Spectrofluorimetric determination of traces of zinc with the cadmium-α,β,γ,δ-tetrakis(4-sulphophenyl) - porphine complex
    Amsterdam : Elsevier
    Analytica Chimica Acta 281 (1993), S. 347-351 
    Details
    ISSN: 0003-2670
    Keywords: Complexation ; Fluorimetry ; Waters ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)85192-M
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  • 94
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    l-Rhamnulose 1-phosphate aldolase from Escherichia Coli. II. Characterization as a zinc metalloenzyme
    Amsterdam : Elsevier
    Bioinorganic Chemistry 1 (1972), S. 233-243 
    Details
    ISSN: 0006-3061
    Keywords: Atomic absorption analysis ; Dihydroxyacetone phosphate ; Inhibition by metal chelators ; Metal chelators ; Metalloenzyme ; Zinc ; l-lactaldehyde
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0006-3061(00)80302-6
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  • 95
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    Formulations for short-duration mushroom composts
    Amsterdam : Elsevier
    Scientia Horticulturae 28 (1986), S. 37-45 
    Details
    ISSN: 0304-4238
    Keywords: carbohydrates ; compost ; duration ; nitrogen
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4238(86)90122-6
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    Nitrogen and calcium nutrition of Petunia x hybrida 'Coral Sea'
    Amsterdam : Elsevier
    Scientia Horticulturae 26 (1985), S. 351-359 
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    ISSN: 0304-4238
    Keywords: Petunia ; calcium ; mineral nutrition ; nitrogen
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4238(85)90019-6
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    Properties of membrane-bound and solubilized forms of alkaline phosphatase from human liver
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 839 (1985), S. 174-180 
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    ISSN: 0304-4165
    Keywords: (Human liver) ; Alkaline phosphatase ; Substrate specificity ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(85)90034-0
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    Influence of zinc on iron uptake by monolayer cultures of rat hepatocytes and the hepatocellular ferritin
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 675 (1981), S. 77-84 
    Details
    ISSN: 0304-4165
    Keywords: (Rat hepatocyte) ; Ferritin ; Iron uptake ; Protein synthesis ; Zinc
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(81)90071-4
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  • 99
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    The use of the potential-sensitive fluorescent probe bisoxonol in mast cells
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1070 (1991), S. 321-331 
    Details
    ISSN: 0005-2736
    Keywords: Bisoxonol ; Exocytosis ; Mast cell ; Membrane potential ; Oxonol ; Potassium ; Sodium pump
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(91)90073-H
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    Electrical transients produced by the toad bladder in response to altered serosal composition at constant osmolality
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 1108 (1992), S. 8-12 
    Details
    ISSN: 0005-2736
    Keywords: (Toad bladder) ; Chloride ; Electrical transient ; Potassium ; Transient
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2736(92)90108-X
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