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  • Inorganic Chemistry  (83,665)
  • Analytical Chemistry and Spectroscopy  (25,033)
  • Cell & Developmental Biology  (25,032)
  • Fisheries
  • Wiley-Blackwell  (133,730)
  • Monterey, CA  (229)
  • Tehran, Iran  (171)
  • NOAA/National Marine Fisheries Service  (165)
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  • 101
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    Stock assessment of kutum (Rutilus frisii kutum) in the Iranian waters of Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25695 | 18721 | 2018-10-10 08:42:16 | 25695 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine catch and fishing effort trends, length and age composition, growth and mortality parameters and estimate biomass and acceptable biological catch of Kutum in the Iranian coastal waters of Caspian Sea from 2013 to 2015. The catch of Kutum was 6112.8 and 5599.2 tons and CPUE were 181.1 and 183.5 kg/haul in 2013-2014 and 2014-2015, respectively. The mean (± SD) of fork length were observed 39.4±6.1 and 40.7±5.6 cm and for total weight were 805.1±378.0 and 891.5±384.6 gram in 2013-2014 and 2014-2015, respectively. The most predominated of length class was obtained 40-42 cm and frequency of immature individuals were observed 37.8 and 44.4 percent during two sampling period, respectively. The range of age was from 2 to 11 year and fish with 4 to 6 years comprised up to 84 percent. In length – weight relationship a, b and r2 were calculated 0.011, 3.02 and 0.96 respectively. K value, L_∞ and t0 were calculated 0.19 (/year), 61.3 cm and -0.99 respectively. Mortality parameters such as Z, M and F were calculated 0.82, 0.36 and 0.46 respectively and Exploitation rate were calculated 0.56. The biomass of kutum estimated 41000 tons and the acceptable biological catch calculated 8250 to 9750 tons. The biomass of Kutum decreased in recently years in spite of produce and release of huge fingerlings. This recruitment (produce and release fingerlings) must be continued for stability of stocks and fishing stress must be decrease by anyway.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Kutum ; Growth ; Mortality ; Parameters ; Biomass ; ABC ; Age composition ; Length ; Rutilus frisii kutum
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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    Format: 68
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  • 102
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    Environmental risk assessment of the activity of specific pathogen free shrimp production centers (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25698 | 18721 | 2018-10-08 09:34:51 | 25698 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study is a part of the national and technology master plan entitled "Attain to technical knowledge of specific pathogen free shrimp production and cut off to dependence on foreign products". The goals of this work were to assess and analysis the risk factors of production of specific pathogen free Litopenaeus vannamei shrimp in its all stages (broodstocking, laravl production, shrimp farming, feeding and water quality), determining the pattern of outcomes monitoring, management and control of outcomes from April 2012 to September 2015 in Bandargah research station and Persian Gulf SPF Shrimp research station and their environment, belonging to Shrimp Research Center, located in Bushehr. Identification and screening of risk factors have been done based on Environment Aspect and Effect Analysis method, (EA)2, using a fine statement questionnaire and quantification of risks. The number of identified risk factors in Bandargah research station was 15 while it was 13 in Persian Gulf SPF Shrimp research station. The more number of risk factors in Bandargah station in respect to its number in Persian Gulf station is might due to lower level of biosecurity, physical structure and aging of Bandargah station and existence of two possible source of contamination, the Bushehr nuclear power plant pollutants and Bandargah fishing harbor, near to the station. On the basis of results, the maximum values of APN in Bandargah station was 42 while it was 30 in Persian Gulf station. These results revealed that the level of risk in Bandargah station is lower than that in Persian Gulf station. The most probable risks in both studied research stations are related to transmission of pathogens in shrimp feeding and water intake pollution.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Bushehr ; Environmental risk assessment ; Shrimp ; Litopenaeus vannamei ; Specific pathogen free
    Repository Name: AquaDocs
    Type: monograph
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  • 103
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    Compare the quality fish paste production of Kilka (Clupeonella cultriventris) and Silver carp (Hypophthalmichthys molitrix) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25689 | 18721 | 2018-10-14 03:10:02 | 25689 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Qualitative changes in the fish spread a mixture of minced meat, fish Kilka (Clupeonella cultiventris) and silver carp (Hypophthalmichthys molitrix) in pasteurized. Fish spread of fish products ready for consumption with soft tissue, such as butter is very good in the world market, ready to use paste of fish production due to the variety, taste good, able to use for all ages in the community a special place in the fisheries industry countries are active in the field of fisheries products. The valuable features of this product, it is possible to produce fish midget, cheap, circumstantial fished, farmed fish, waste and waste from the fish processing factories are notably food production of fish protein sources that have the flavor is very suitable for all age groups was the research goals, in order to process the cream edible fillets and minced meat (minced fish) cultured fish silver carp (Hypophthalmichthys molitrix) and fish in the Caspian Sea Kilka (Clupeonella cultriventris) are treated as a combination of four: 1. Silver carp minced meat 100% +30% filler +1% spice, thickeners, improved color, taste 2. Kilka minced meat 100% +30% filler +1% spice, thickeners, improved color, taste 3. Kilka and Silver carp minced meat 50+50 % +30% filler +1% spice, thickeners, improved color, taste 4. Silver carp and Kilka minced meat 75+25 % +30% filler +1% spice, thickeners, improved color, taste 5. Silver carp and Kilka minced meat 25+75 % +30% filler +1% spice, thickeners, improved color, taste. After the initial blanching minced meat (80oc temperature for 3 min) were processed, heat resistant glass samples processed at the full weight of 50 g were, after a hot air steam, capping has been pasteurized for 60 minutes at 80oc, after a hot air steam, capping has been pasteurized for 60 minutes at 80oc and the results show, treatment 100% Silver carp minced fish +30% filler +1% spice, thickeners, improved color, taste better than other treatments and data was significant (P〈0.05) .
    Keywords: Fisheries ; Iran ; Minced fish ; Sensory evaluation ; Fish paste ; Hypophthalmichthys molitrix ; Clupeonella cultiventris ; Kilka fish
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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    Format: 62
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  • 104
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    Investigation on possibility of enrichment pasta by using spirulina microalgae (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25712 | 18721 | 2018-10-10 10:02:17 | 25712 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of this study was to investigate the possibility of producing enrichment pasta by adding spirulina powder in commercial pasta formulation. For achievement to this aim, Spirulina platensis power of 0, 0.25, 0.5, 0.75 and 1 percent was added in pasta formulation. Pasta with no adding spirulina (0% ) was used as control. Sensory properties, color, texture, fat, protein, minerals, amino acids, fatty acids and cooking properties were analyzed. Results indicated that no microbial effects was found in research samples com paring to the control. No significant (p〈0.05) effects were found between the control and other samples in sensory properties. Results also indicated that protein and iron content in the samples including sprulina were significantly higher the control. Physical characteristics of the samples during the cooking showed that all samples had standard level.
    Keywords: Fisheries ; Iran ; Investigation ; Microalgae ; Spirulina platensis ; Protein ; Minerals ; Fat ; Fatty acids ; Physical
    Repository Name: AquaDocs
    Type: monograph
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    Format: 42
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  • 105
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    Environmental and ecological studies in northern Alborz aimed at developing the fisheries resources (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25717 | 18721 | 2018-10-14 03:16:05 | 25717 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Caspian Sea with an area of 400 thousand square kilometers is the largest lake in the world. The Caspian Sea about 1200 km from north to south on the longest section and an average width of 320 km. Along the coastline around the Caspian Sea is about 6500 kilometers. Caspian Sea is about 78,000 cubic kilometers of water volume that is 44% of stocks of blue lakes around the world. Caspian Sea basin, which is composed of seven major basins of the main watershed from west to east are: juniper, Talsh- Anzali, large Sefidrood between Haraz Sefid and, Hraz- Gharehsou, Nagorno Sv- Gorgan and Atrak in the basin of Aras no limits to the beach. Aras sub-basin is located in the North West and Iran, the second largest sub-basin of the Caspian Sea. Talysh-Anzali on the Caspian Sea basin West and the seventh largest sub-basin of the Caspian Sea. White basin is located in the South East of the Caspian Sea and the extent of the sub-basin of the Caspian Sea. Haraz located in the south Caspian Sea basin and the ninth largest sub-basin of the Caspian Sea. Gorgan is located in the South East of the Caspian Sea basin and the fourth largest sub-basin of the Caspian Sea. In these areas, about 28 percent of the total fish production in the northern waters of aquatic allocated.
    Keywords: Fisheries ; Management ; Iran ; Northern Alborz ; Environmental ; Ecological ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 58
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  • 106
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    Production of bio-compatible nanofiber from chitosan with electrospinning method for preservation and maintenance aquatic products (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25713 | 18721 | 2018-10-10 10:11:15 | 25713 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Chitin nanofibers are prepared from the exoskeletons of shrimp by a simple mechanical treatment after a series of purification steps. The nanofibers have fine nanofibers networks with a uniform width of approximately 10 nm. Grinders and highpressure water jet systems are effective for disintegrating chitin into nanofibers. Acidic conditions are the key factor to facilitate mechanical fibrillation. Ultrafine fibers were successfully fabricated chitosan and fish skinextracted gelatin via electrospinning (ES). Important ES parameters, such as concentration of aqueous acid and fish gelatin solutions, and electric field intensity were examined to investigate the effects on the morphology of the gelatin nanofibers. Due to the poor mechanical properties of the fish gelatin membranes, composite nanofibers made of fish gelatin and poly(L-lactide)(PLLA) were produced with a novel solution. The introduction of PLLA remarkably improved the mechanical properties of the gelatin membranes. With a combination of good biocompatibility and mechanical properties, fish gelatin/PLGA blending non-woven mats are considered to be very promising in fish fillet coating application.. in this study, we fabricated a novel nanofibers composed of fish collagen (FC) and polycaprolactone (PCL) blends by using the electrospinning method. Nanofibers were characterized using a scanning electron microscope (SEM), and it was revealed that the diameter of nanofibers decreases as FC content was increased in the FC/PCL composite nanofibers. Several modifications to the chitin NF surface are achieved, including acetylation, deacetylation and maleylation. The results of this study revealed that: 1–It is possible to produce Nanofibers from chitosan and fish gelatin. 2– Covering and coating of processed fish by nanofibers are applicable and increasing the possibility of shell life for the processed fish. 3– Nanofibers which have been produced from chitosan and fish gelation not only is environmentally friendly but also it will be eatable while has been covered for fish fillets. biocompatible chitosan and gelatin made from fish, fresh fish fillets do not have the ability to cover and packaging, but is edible and used.
    Keywords: Biology ; Chemistry ; Fisheries ; Iran ; Chitin ; Chitosan ; Nanofiber ; Chemical modification ; Fish ; Aquatic ; Maintenance
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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    Format: 66
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  • 107
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    Determining the opening and closure of shrimp fishing season (Penaeus semisulcatus) in the waters of Bushehr province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25714 | 18721 | 2018-10-10 09:04:28 | 25714 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine the opening and closure of Penaeus semisulcatus fishing season in July, August and September during 2012-2014 in the waters of the Bushehr province. 30 stations were hauled based on a Stratified Random Sampling design in three depth layer of less than 10, 10-20 and more than 20 meters. The optimum dates of opening shrimp fishing season for the years of 2012-2014, were calculated as 4th, 28th and 13th July respectively. The closures of Shrimp fishing season for years of 2012-2014 were determined to be 10th September, 29th of August and 5th of September. The estimated biomass were for all of shrimp species in the years 2012-2014, 930, 1009 and 526 tonnes respectively. Penaeus semisulcatus contributed 92, 96 and 99% of the shrimp stock in the mentioned years. The CPUE (catch per hour) were calculated to be 1.6, 16.9 and 6.9 kg per hour, in the years 2012-2014, respectively. The highest aggregation of Green tiger Shrimp (P. semisulcatus) were observed in 10-20 depth meters layer in southern waters of Bushehr province at the fishing areas (Motaf to rostami). The changes in climatic conditions resulted in different dates of the opening season and probable illegal fishing may have caused the reduction of shrimp biomass in recent years. Hence to Protect the stocks the economic species and the sustainability of shrimp fishing, it is necessary to properly manage fisheries and determine the opening and closure fishing season Penaeus semisulcatus through conducting research surveys.
    Keywords: Fisheries ; Iran ; Bushehr province ; Green tiger prawn ; Penaeus semisulcatus ; Fishing opening ; CPUE ; Biomass
    Repository Name: AquaDocs
    Type: monograph
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  • 108
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    The stock assessment of bony fish, carp (Cyprinus carpio) and roach (Rutilus rutilus) in southern coast of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25729 | 18721 | 2018-10-10 10:01:45 | 25729 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study, the combination of length, growth rate, mortality rate and also the current of status Operation Carp and roach commercially as important species in southern waters were reviewed. Samples were taken from beach sine net catch and fish were offered at fish market. The age composition of carp and roach was 1 to 16 and 1 to 4 years respectively, most catch carp and roach was in length range of 31 to 39 cm and 18 to 20 cm respectively. Growth parameters during the program by ELFFAN I FiSAT for Carp and Roach obtained from von Bertalanffy growth function were L_∞ =70.78 and 32.39 cm, K = 1.24/year and 1.24/year; respectively. the growth parameters such as infinite length( L_∞), growth coefficient (K) and t0 age zero base on One Brtalnfy equation estimated, 78.70, 0.14, 32.39, 0.5 ,-0.5 Total mortality coefficient Using the method of catch curve (Z), natural mortality rate using the empirical formula Pauli( M), fishing mortality (F) using the formula = Z - M and Growth performance index (Ǿ) for Carp and Roach were obtained 1.5year^-1, 0.9year^-1, 0.5year^-1, 0.26year^-1, 1.24, 0.4, 2.85 and 2.54 respectively. The biomass (B) and Maximum Sustainable Yield (MSY) with the present effort for Carp and Roach were estimated 1628.7t, 368.9t and88.06t, and 32.7t respectively.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Carp ; Roach ; Biomass ; Catch ; Growth rate ; Mortality ; Length
    Repository Name: AquaDocs
    Type: monograph
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  • 109
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    Population dynamic of bony fishes in Iranian waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25728 | 18721 | 2018-10-10 10:17:05 | 25728 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment and Acceptable Biological Catch (ABC) of bony fishes in the Iranian coastal waters of Caspian Sea in the years 2013-2014 and 2014-2015. According to the result, the numbers of beach seines were 124 and 120 and their fishing efforts were observed 44688 and 46299 beach seining, respectively. The total catches (including illegal fishing) were also obtained 17144.3 mt and 16733.2 mt during 2013-2014 and 2014-2015, respectively. The highest proportion of catch was belonged to kutum and golden grey mullet (94.4% and 89.5%, respectively) in two fishing seasons mentioned above. Growth parameters of kutum were estimated as K=0.19/yr, L_∞ =61.3 cm, t0=-0.99/yr. The Growth parameters were K=0.18/yr, L_∞= 61.1 cm, t0= -0.14/yr for golden gray mullet and were K=0.14/yr, L_∞= 70.8 cm, t0= 0/yr for common carp. Based on catch-at-age data, in the years 2013-2014 and 2014-2015, the total biomass, from the biomass-based cohort analysis were estimated 46900 mt and 41000 mt for kutum and 11550 mt and 12670 mt for golden grey mullet, respectively. The reference points of F0.1 and F35% were 0.41/yr and 0.34/yr for kutum and 0.36/yr and 0.33/yr for golden grey mullet, respectively. According to catch of species/groups, three main groups can be divided easily. The one–way ANOSIM catch similarity test indicated that coverage rates of different years were homologous and similar, but the coverage rates of different months, regions and periods were not similar. Also, there were significant differences in community composition of fishes in catch of beach seines among three times; three durations; three regions and seasons (in all cases MRPP, p〈0.001). During 1996-2000 species Rutilus rutilus, Vimba vimba, Chalcalburnus chalcoides, Aspius aspius, Barbus sp, Salmo trutta caspius and Silurus glani in the years 2000-2005 species/groups shads, Abramis brama and Esox lucius and in the years 2005-2012 species Cyprinus carpio and Stizostedion lucioperca were indicator species. Also, in the west region of the Caspian Sea species/groups Vimba vimba, Chalcalburnu schalcoides, Aspius aspius, Barbus sp, Abramis brama, Stizostedion lucioperca, Esox lucius and Silurus glani; in middle Rutilus frisii kutum, shads and Salmo trutta caspius and in east species/groups mullets, Rutilus rutilus and Cyprinus carpio were identified as indicator species. Based on available models, the ABCs were estimated as 8250-9750 mt for kutum and 1650-1950 mt for golden grey mullet (with precautionary approach 8250 mt and 1650 mt for kutum and mullet, respectively). For two species, the ABC with a lower and more accurate value based on more information, should be selected for the implementation of a precautionary management approach.
    Keywords: Biology ; Fisheries ; Iran ; Caspian Sea ; Bony fishes ; Growth ; Mortality ; Parameters ; Biomass ; Clustring ; Acceptable biological catch ; Cyprinus carpio ; Rutilus rutilus ; Salmo trutta caspius ; Rutilus frisii kutum ; Stizostedion lucioperca ; Abramis brama ; Esox lucius ; Aspius aspius ; Chalcalburnu schalcoides
    Repository Name: AquaDocs
    Type: monograph
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    Format: 60
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  • 110
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    Survey on stocks of Caspian Sea mullets (Liza aurata; Liza saliens ) in Iranian coastal waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25737 | 18721 | 2018-10-13 06:22:04 | 25737 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment of Caspian Sea mullets in the Iranian coastal waters of Caspian Sea in the fishing season of 2013-2014. For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr, Noshahr, Babolsar and Torkmen were involved from the start to the end of fishing season.Gathered data Were entered to the computer. For data analysis, common methods were undertaken for estimation of growth parameters, mortality rates, biomass and Maximum Sustainable yield (MSY) as well. According to the result, the number of beach seines cooperatives was 124 and fishing efforts were 44688 beach seining haul. The catch per unit of effort CPUE) was calculated 53 kg/haul during this fishing season. The total catches of Caspian Sea mullets (including illegal fishing estimated as 2373 mt. Growth parameters of golden gray mullet (Liza aurata) were estimated as K=0.16/yr, L_∞=57.4 cm, t_0=-0.45/yr. Based on catch-at-age data, in the fishing season of 2013-2014, the total biomass, from the biomass-based cohort analysis were estimated 12473.3. mt. Based on these results, the fishing mortality rate in fishing season of 2013-2014 were 0.575/yr. In this survey, the Maximum sustainable yield were estimated as 2558.6 mt respectively. Generally from three Northern Province’s cooperatives 3406 samples collected. Results of biometry of golden gray mullet (Liza auratus) showed that the mean length and weight and age of this species were 32.3±6.1 cm and 383.5±74.823.4 g and 1.2±5.6 y respectively and leaping gray mullet (Liza saliens) showed that the mean length and weight and age of this species were 24.8±3.3 cm and 119±25.5 g and 2.5±0.6 y respectively. The biometric results showed that, 97.5% of the samples belonged to golden gray mullet and population of leaping gray mullet was sever declined. Also, the fishing of the mullet was increased over the last year by 10.3 % from 2151 tons to 2373 tons per year during 1391-92 and 1392-93, respectively .
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Noshahr ; Babolsar ; Torkmen ; Iranian waters of the Caspian Sea ; Mullets ; Caspian Sea mullets ; Liza aurata ; Growth ; Mortality ; Parameters ; Biomass ; Biometry
    Repository Name: AquaDocs
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  • 111
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    Supply and protected different population of Litopenaeus vannamei subadult zero foster (F0) from difference provinces Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25754 | 18721 | 2018-10-13 07:36:51 | 25754 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Nowadays, Litopenaeus vannamei are the most important species of farmed penaeidae shrimp in the world that is rapidly replacing native species in areas aquaculture. Due to demand increase for this species culture, shrimp displacement to different areas may be associated with some potential pathogens transferred to new areas farmed. Therefore, in this study were prepared bi-osecurity conditions for specific disease-free production of L. vannamei. Thereafter, three populations (Molokaei, High health and mix of Molokaei and High health) of the shrimp various reserves were detected base on origin and genetic indexes such as: observed heterozygosity, expected heterozygosity, allele frequency, coefficient inbreeding, genetic differentiation, genetic distance and genetic identity. On the other hand, epidemiological studies indicate non pathogens (viral, bacterial, fungal and parasitic) recognition of different populations selected in the quarantine salon. The bioassay results showed that the average weight and length of the populations of High health and Mix significantly greater than was a population of Molokaei. The shrimp populations were stocked in fiberglass tank (five ton) and were kept separated in the quarantine salon. During maintenance shrimp of populations in the quarantine salon were evaluated living and non-living pathogens with PCR, microbiology and biochemical methods. There is not any pathogens detection from shrimp populations stocking in the quarantine salon, so the shrimps were carried over to pond for broodstock culture of specific pathogenic free.
    Keywords: Fisheries ; Iran ; Litopenaeus vannamei ; Specific pathogenic free ; Bi-osecurity ; Population
    Repository Name: AquaDocs
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  • 112
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by swept area method (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25752 | 18721 | 2018-10-13 06:16:11 | 25752 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, ten research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (north-west Persian Gulf) to 61º 25´ E in the east (borderline with Pakistan) from 2012 to 2014 The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method during this three years period, the strat A and B weren’t covered. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2012, 2013 and 2014 were 1.0, 1.4 and 1.6 times more than the Oman Sea and totally 50-60% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2012 & 2014; and C region (Genaveh to Bordkhoon) in 2013 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2012 to 2014 the region K (Sirik to Jask) in the Oman Sea and Stratum Q (Bersi to Gwatr) had the highest value of CPUA. On the contrary, the stratum M (Biahi to Galak estuary) showed the lowest value of biomass for both commercial and non-commercial fishes. With review the mean CPUA in different depth layers for years 2012, 2013 and 2014, it was concluded that in the Oman Sea with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 30-50 m The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 63.4, 65.0 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Ribbon fishes, Carangids, Grunts, Japanese threadfin bream, Lizardfish and Barracuda for both Persian Gulf and Oman Sea.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Commercial fishes ; Non-commercial fishes ; Biomass ; CPUA ; Species ; Estimation ; Method ; Area ; Demersal resources
    Repository Name: AquaDocs
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  • 113
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    Supply and protected different population of Litopenaeus vannamei subadult zero foster (F_0) from difference provinces Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25762 | 18721 | 2018-10-13 07:57:25 | 25762 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Nowadays, Litopenaeus vannamei are the most important species of farmed penaeidae shrimp in the world that is rapidly replacing native species in areas aquaculture. Due to demand increase for this species culture, shrimp displacement to different areas may be associated with some potential pathogens transferred to new areas farmed. Therefore, in this study were prepared bi-osecurity conditions for specific disease-free production of L. vannamei. Thereafter, three populations (Molokaei, High health and mix of Molokaei and High health) of the shrimp various reserves were detected base on origin and genetic indexes such as: observed heterozygosity, expected heterozygosity, allele frequency, coefficient inbreeding, genetic differentiation, genetic distance and genetic identity. On the other hand, epidemiological studies indicate non pathogens (viral, bacterial, fungal and parasitic) recognition of different populations selected in the quarantine salon. The bioassay results showed that the average weight and length of the populations of High health and Mix significantly greater than was a population of Molokaei. The shrimp populations were stocked in fiberglass tank (five ton) and were kept separated in the quarantine salon. During maintenance shrimp of populations in the quarantine salon were evaluated living and non-living pathogens with PCR, microbiology and biochemical methods. There is not any pathogens detection from shrimp populations stocking in the quarantine salon, so the shrimps were carried over to pond for broodstock culture of specific pathogenic free.
    Keywords: Aquaculture ; Fisheries ; Iran ; Litopenaeus vannamei ; Specific pathogenic free ; Bi-osecurit ; Population
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    Monitoring (biology and catch) of kilka in Iranian commercial catch regions (2002-2005) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25084 | 18721 | 2018-08-22 07:18:57 | 25084 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Through most of the last century, three endemic kilka species supported major commercial species in the Caspian Sea. It is clear that catches and abundance of all species have changed. Recent changes in the Caspian Sea ecosystem have occurred as a consequence of ecological change caused by the invasive ctenophore (Mnemiopsis leidyi). In this investigation which had been done in commercial catch regions during 2002-2004, in addition of biological characteristics survey such as species composition, length, weight, age, sex ratios and maturity stages; catch and catch per unit effort also were analyzed. During the years 2002-2004 the annual catches of kilka varied between 15000-25000 mt and CPUE varied between 1.077-1.474 mt (vessel×night). The frequency of anchovy kilka declined from 69.5% in 2002 to 26.9% in 2004. During the years 2002, 2003 and 2004 the frequency of common kilka were 30.4%, 48.9% and 71.9%, respectively. During this period the frequency of bigeye kilka was negligible. The average fork length of anchovy kilka increased from 100.4 mm in 2002 to 105.0 mm in 2004 and the average weight were 6.4 g and 8.4 g, respectively. The average fork length of common kilka increased from 87.0 mm in 2002 to 93.8 mm in 2004 and the average weight were 5.2 g and 7.4 g, respectively. Anchovy kilka spawn in spring and autumn but mass spawning anchovy occurred in autumn. Spawning of common kilka occurred in spring and early summer. In the age compositions of anchovy kilka, age 3 was the largest age group during 2002 and 2003 (55.3% and 52.1%, respectively). In 2004, age 4 predominated (42.5%). For common kilka, ages 3 and 4 predominated (representing 67.2, 62.0 and 69.1% of catches, respectively). According to CPUE and biological characteristics, after the appearance of ctenophore in the Caspian Sea, the abundance and biomass of bigeye and anchovy kilka collapsed.
    Keywords: Biology ; Fisheries ; Iran ; Caspian Sea ; kilka ; Species ; Ecosystem ; Mnemiopsis leidyi ; Survey ; Length ; Age ; Sex ratios ; Weight ; Maturity ; CPUE ; Anchovy Kilka ; Spawning ; Bigeye kilka
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    Stock assessment of bonyfishes in the Iranian coastal water of the Caspian Sea (2004-2005) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25094 | 18721 | 2018-08-23 05:31:17 | 25094 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr , Noshahr , Babolsar and Torkmen were involved from the start (2004.10.23) to the end of fishing season (2005.04.10). Gathered data were entered to the computer based on species. For data analysis different methods were undertaken such as Bertallanfy equation for growth parameter Beverton and Holt for total mortality rates, pauly's imperical model for natural mortality rate and cohort Analysis for biomass estimation. Total catch with taking into account of poaching, was estimated 15140 tons reported by scientific committee of catch and fishing harbor relief of Iranian Fishery Company. The total recorded catch of beach seine cooperatives was 10644 tons that comprise 70.2% of the total catch. Total catch of Caspian Kutum was estimated 6612 tons that had 1856 tons (22%) decrease with comparison of the last year. Biomass of Caspian kutum in Iranian coastal Water of the Caspian Sea in 2003-2004 estimated about 20400 tons. The total catch of golden gray mullet was estimated 4425.6 tons that constitute 29.2% of total catch of bony fishes. Biomass of this species was estimated 12200 tons and based on this amount of biomass, Maximum Sustainable Yield (MSY) was calculated as 3577 tons. Long nose mullet comprised only 1.4% of the mullet catch. The catch of common carp in 2004-2005 fishing season continued its increasing trend and caught in amount of 3087 tons by beach seine cooperatives that had 2.2 fold increase in comparison of previous fishing season. Most of the catch occurred in Golestan province and was immature and undersize and the length frequency modes showed moving towards bigger size and older age groups in comparison of previous fishing season. The catch of pick perch in 2003-2004 decreased with comparison of the last year and estimated about 22.5 tons. Most of the catch of pick perch was immature and undersize. Approximately all of the catch is due to releasing of fingerling of this species by Fishery Company especially in Guilan province. Total catch of bream was estimated 27.4 tons and most of which was immature and undersize. Population of asp is critically endangered and the catch of this species is very low (500 kg). Restocking of this species must be considered by Iranian fishing company.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Noshahr ; Babolsar ; Torkmen
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    Comprehensive study on probability of controlling Caspian Sea invasive Ctenophora Activity 4: The laboratory study on probability of controlling Mnemiopsis leidyi by use of Beroe ovata (reproduction study of B. ovata in the Caspian Sea water) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25096 | 18721 | 2018-08-23 05:35:57 | 25096 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In 1999 Mnemiopsis leidyi was introduced to the Caspian Sea from the Black Sea with ballast waters from the ships. The comprehensive study on probability of controlling Caspian Sea invasive Ctenophora planned after a remarkable of decreeing in Kilka fish catches stocks and fisheris community problems. This study focus on reproduction experiments of Beroe ovata as the best candidate for control of Mnemiopsis population size in the Caspian Sea that was performed in Turkey and Iran during 2002-2003. At 2002, 87 specimens of B. ovata, 10-50 mm transferred to Caspian sea ecology research center from Marmareh sea where acclimated with Caspian sea water gradually. At 2003, experiments were performed near to Black sea (at Sinop) with freshly collected Beroe ovata, 40-65 mm size in three salinity level treatment, the Black sea water 18 , Mixed water 15 and Caspian water 12 . 130 individuals of Beroe ovata were brought from Sinop (Turkey) to Iran during 2003. A number of Beroe specimens were sent to Guilan province for reproduction studies and another part were sent to Mazandaran province for both reproduction and mesocosem studies. For control we had 1 Beroe, length 30 mm in the Black Sea water that was alive during of study in Iran. The Jars were examined each day for ova and larvae and they were collected and put into glass container of Caspian water for hatching and developing survey, some of them were left without any handling for larvae developing. Also in another experiment the eggs collected from jars were placed in the same three treatments for studying of growth and survival. The results were unsuccessful on propagation experiments at 2002 since the spawning and hatching rates were very low (20 ova) and, none of the larvae developed into adults in Caspian Sea water. The spawning was more in Marmareh sea water with 138 ova where only 7 larvae was hatched. Results showed that Beroe specimens is able to survive and reproduce in Caspian water but was not as well as Black Sea also the Beroe larvae growth rate is low in the Caspian Sea water. Maximum fecundity of Beroe individual was 2212 and 235 ovae in Caspian Sea water in site Sinop and Iran respectively. Results showed 34-100% eggs in Caspian Sea water were destroyed and did not develop. In Iran we obtained only one larvae with 5 mm length, other larvae were at different stages of development but most of them were 1.2 2 mm. The results of mesocosm survey showed most of ova and larvae have been obtained from the tanks where individuals B. ovata were with Mnemiopsis. Fecundity of Beroe in the control with Black Sea water were between 17 to 1879 with average of 828 ± 112 ova. The poor results of B. ovata reproduction obtained in this survey in Caspian Sea may be due to transportation and acclimation stress and low salinity of Caspian Sea water.
    Keywords: Ecology ; Fisheries ; Iran ; Caspian Sea ; Mnemiopsis leidyi ; Beroe ovata ; Survival ; Growth ; Comprehensive ; Laboratory
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    Study of the fluctuations in the sturgeon populations in the coastal water of the Caspian Sea (Golestan Province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25100 | 18721 | 2018-08-23 05:41:22 | 25100 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study the frequency of the sturgeon population in the lower depth (〈10m) of the south Caspian Sea in four area are investigated. Absolut frequency and CPUE are studied per seasons in four regions during 2003-2005. The number of total catch of the sturgeon during 2003-2005 was 568 that 262 and 306 respectively were caught in 2003-2004 and 2004-2005. Persian Sturgeon (Acipenser persicus) was the most dominant species in the catch and other species suches Stellate Sturgeon (A.stellatus) spine Sturgeon (A.undiventris). Persian Sturgeon (A.gouldenstadti) and Great Sturgeon (Huso huso) were more frequent respectively. Most of the Persian Sturgeon were caught at the TAZEABAD, MIAN GHALEA, KHAJANAFAC and TORKMAN fishery stations respectively. Most of catch in 2003-2004 has been in 2 meter depth of water where as it was in 10 meter depth in during 2004-2005. Persian Sturgeon has the highest CPUE value in 2003-2005. The CPUE value for Persian Sturgeon, 0.69, 0.58, 0.28, 0.21 Stellate Sturgeon, Spine Sturgeon, Russian Sturgeon and Great sturgeon, 0.03 were respectively. Fluctuation of length size of Persian Sturgeon in 2003-2005 were between 10 to 140 centimeter. Significant different for mean length Persian Sturgeon between (2003-2004) and (2004-2005) were found tukey test p〈0.05 but there were not found for mean length Stellate Sturgeon at this tim.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Golestan province ; Fluctuations ; Sturgeon ; Population ; CPUE ; Acipenser persicus ; A.stellatus ; A.undiventris ; A.gouldenstadti ; Fishery ; Persian sturgeon ; Stellate Sturgeon ; Spine Sturgeon ; Russian sturgeon ; Great sturgeon
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    Monitoring green tiger prawn stock in Bushehr Province waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25102 | 18721 | 2018-08-23 05:24:59 | 25102 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The results of 30 months of trawl sampling on P. semisulcatus, De Hann 1848, obtained through operational phase of MONITORING GREEN TIGER PRAWN RESOURCES project, along with results of another available 28 months of the data of the same structure prior to this, has formed an invaluable time series of data as a proper basis for the further analysis. The survey area is located at North-west of the Persian Gulf from Bahrekan to Dayer waters. The ultimate goal of this study is to come to a better understanding of behavioral pattern of Green Tiger Prawn in its exploited phase after recruitment to the fishery. In this study, the confirmation of the life cycle of P. semisulcatus, to the general life pattern of Penaeidae shrimps was observed. Of the peculiarities of this pattern are the yearly bi-modal spawning and two corresponding peaks of recruitment. There exist two spring and autumn generations, which the major spawning in autumn produces the main recruitment in summer and the autumn generations stem from spring spawning. The spatial and temporal distribution of shrimp is highly variable by month and year. Depending on the year, higher shrimp densities are often found in early summer between Lavar and Rostami and/or Rostami to Bushehr and extend north and south in August. This result can be used in better design of sampling scheme for nursery studies. The main recruitment, which the fishery is depended upon, is in July to August and a second one occurs December-February. The timing and strength of both recruitments vary inter-annually. The proportion of prerecruits in southern area is always higher and the modes more prolonged than in northern area. The period of major recruitment starts earlier and lasts longer in the south than the north. A consistent pattern is not seen for the secondary recruitment, which, usually occurs in December-January. It is hypothesized that 1- the secondary recruitment might occur in Kuwait and/or Saudi Arabia waters, 2- insufficient number of spawners in spring or 3- high mortality in summer could cause the weakness of secondary recruitment. The spatial distribution of the mature female shrimps in spawning months indicates that the northern part of study area is an aggregation ground. It is also found that this aggregation grounds are close to two main fresh water sources (Helleh and Mond rivers), and these phenomena can be somehow related. The average length at 50% maturity varies inter- annually and is estimated to be 15.3 Cm. Length-frequency distribution of shrimps by sex reveals 1 to 3 modes depending on the month and year. In southern part a more complicated and less consistent pattern of recruitment and growth between years was observed. There is multiple or/and continuous recruitment especially during summer months. The von Bertalanffy growth parameters were estimated. The Findings are used to design new sampling schemes to cover the whole life cycle of this species enabling one to explain the variations in their response to the environment and fishery. The results of this study, lead us in building appropriate assessment and management models.
    Keywords: Fisheries ; Iran ; Bushehr ; Penaeidae ; P. semisulcatus ; Monitoring ; Green Tiger Prawn
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    Cryopreservation of sperm in Acipenser nudiventris, Huso huso, Acipenser stellatus and Acipenser persicus in the breeding season (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25097 | 18721 | 2018-08-22 07:19:46 | 25097 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Considering decrease in total catch of sturgeon & threat of extinction in their stocks, special measures might be adopted. Sperm cryopreservation is one of the suitable methods to prepare bank of frozen gamete for future use in artificial breeding in order to prohibit extinction of sturgeon stocks. This study carried out on 27 male sturgeon during 2001-2004. The investigated sturgeon include 12 male Persian sturgeon (Acipenser persicus), 7 male Acipenser stellatus, 5 male Acipenser nudiventris and 3 male Huso huso. Sperm Collected from spawners in Shahid Beheshti & Shahid Marjani sturgeon rearing & propagation Complex in Rasht & Gorgan. The Sperm which was collected from Shahid Marjani propagation complex placed in the sealed Vessels & transferred by coleman in near zero temperature to cryopreservation laboratory of international sturgeon research institute for further investigation. In this study, the sperm was diluted in ratio 1:1 in two culture media containing dimethyl sulfoxide & glycerol (BC) and the samples stored in 1 ml insulin syringe & 0.5 ml Piot. The diluted sperm froze in a special temperature by automated freezer model 5300 (France IMV). Three phases applied to freeze the samples which are as follow: 1- Begin to freeze from +50c to -100c (30c /min) 2- From 10 0c to 70 0c (20 0c /min) 3- From 70 0c to 130 0c (25 0c /min) after freezing, the samples placed in liquid nitrogen containers with 196 0c temperature. For thawing, the sperm samples took out of liquid nitrogen & placed in water 40 0c. Then motility percent & the sperm quality investigated under 400x microscope. According to the results the mean motility percentage of fresh sperm in Persian sturgeon, Acipenser Stellatus, Acipenser nudiventris and Huso huso was 84, 73.75, 67.5 and 76.66, respectively. The mean percentage of motility in frozen sperm which placed in media containing dimethyl sulfoxide was 32, 37.5, 40 and 20%, respectively. Also, the frozen samples that preserved in BC media (Biociphus) showed 5.2, 75.25, 4.11 and 2.66% motility, respectively. In blank group, the mean fertilization percent of eggs was 90, 72, 71.25 and 90%, respectively. In the treatment group applying frozen sperm in culture media containing dimetlylsulfoxide, the mean fertilization rate was 30, 6.5, 25.39 and 4.75%. Furthermore, no fertilization (0.0%) observed using frozen sperm stored in Biociphus culture media containing glycerol. There was no significant difference in fertilization percent comparing the two storage places (syringe & Piot). According to investigations the culture media containing dimethyl sulfoxide, is a suitable diluter for sturgeon sperm. So, the Cryopreservation technique can be used to preserve the sturgeon sperm for future fertilization & through this way we can prevent extinction of sturgeon stocks.
    Keywords: Biology ; Fisheries ; Iran ; Rasht ; Gorgan ; Cryopreservation ; Sperm ; Acipenser nudiventris ; Huso huso ; Acipenser stellatus ; Acipenser persicus ; Breeding ; Sturgeon ; Temperature ; Motility ; Fertilization ; Spermatozoa ; Freezing
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    Variations in sturgeon populations in the coastal waters of the Caspian Sea (Guilan province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25106 | 18721 | 2018-08-23 05:36:01 | 25106 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The present study was conducted from autumn 2003 to summer 2005 with the objective to estimate distribution and relative abundance in different species of sturgeons as a function of seasons, and regions in the west coast of the Caspian Sea (Guilan province).Gillnets with a different mesh sizes (26, 33, 40, 60, 100, and 150 mm) were set up at different depths(2, 5, and 10 m) for 24 h. Data on variations in catch, catch per unit effort(CPUE) and length and age composition of sturgeon species were analyzed statistically. Data on CPUE in each region and depth and mean estimates of length and age in fish were reported for each season and each year of the study period. CPUE during 2004-2005 was 1.32 fish which was 30.1% lower than CPUE (1.89 fish) recorded in 2003-2004.CPUE for all species except A. nudiventris decreased during 2004-2005 as compared to that in 2003-2004. Acipenser persicus caught during 2003-2004 and 2004-2005 ranged from 15 to 45 cm in length and comprised 91.1 and 97.1% respectively of the total sturgeon catch. These fish belonged to the one year age class. Mean length recorded in sturgeon fish caught in 2004-2005 decreased as compared to that recorded in 2003-2004. Significant differences were recorded in total length of fish caught in 2003-2004 and 2004-2005. Results obtained from the present study reveal that the abundance of fish increased from west to east indicating a direct relationship between the general currents found in the Caspian Sea and the higher density of nutrients in the eastern region.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Guilan Province ; Stock ; Sturgeons ; Gillnets ; CPUE ; Fish ; Species ; A. nudiventris ; Acipenser persicus ; Length ; Nutrients ; Costal waters
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    Designing and establishment of ISO/IEC17025 in the research centers affiliated to IFRO the first phase: the Persian Gulf Ecological Research Center, Caspian Sea Ecology Research Center and Iran Shrimp Research Center (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25307 | 18721 | 2018-09-09 06:48:34 | 25307 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The plan entitled "designing and establishment of ISO/IEC17025 in laboratories of three research centers affiliated to Iran Fisheries Research Organization" was carried out in the frame of three projects from March 2008 for about three years. Among the laboratories of The Persian Gulf ecological research center, the Caspian Sea ecological research center and the national shrimp research center 7, 5 and 3 laboratories were selected for accreditation, respectively. The quality manuals of the test laboratories were written following the requirements of ISO/IEC 17025. During the establishment of the system standardization of the test methods, calibration of the equipment, test methods validation and update and improvement of physical conditions of the laboratories were performed. The technical and quality management competence of the laboratories affiliated to the Persian Gulf ecological research center were evaluated by the auditors from DGA (the German Accreditation System for Testing Laboratories), which is signatory of ILAC (International Laboratory Accreditation Co-operation). But in the case of the two other centers, the laboratories were accredited by Iran Accreditation System (IAS). The laboratories officially accredited, after the successful completion of the accreditation process (including implementation of corrective actions for the detected non-conformities). Production of reliable results of the test methods from national and international scientific organizations' point of view as well as facilitation in development of bilateral and multilateral relations with them can be considered as the advantages of the system establishment. Moreover, exchange of the relevant scientific information and experiences among the researchers will be facilitated.
    Keywords: Management ; Iran ; Persian Gulf ; Caspian Sea ; Bandar Abbas ; Sari ; Bushehr ; ISO/IEC17025 ; Shrimp ; Standardization ; Laboratories ; Fisheries ; Iran Shrimp Research Center ; Caspian Sea Ecology Research Center ; Persian Gulf Ecological Research Center
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    Status of lanternfish stocks & exploitation in the Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25313 | 18721 | 2018-09-08 16:46:10 | 25313 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The fishing data of 1814 hauls during 393 fishing day s activity (2008-2010) in the Oman Sea were collected from F/V Fanoos-2, Fanoos-3, Fanoos-3 and Fanoos-4. It was found that the total mean CPUE of pelagic fishes were 1903 kg/h of which 1bout 1115 kg/h (58%) belong to lantern fishes and the others belong to hairtail, bigeye croaker and threadfin bream with a total CPUE of 788 kg/h considered as by-catch. Also, the maximum CPUE of lanternfish were in months January to March with values of 2473, 2160, 2784 and 2198 kg/h. A comparison between years 2008, 2009 and 2010 show that the CPUE of lanternfish were 1356, 1148 and 936 kg/h, and for by-catches were estimated 1034, 854 & 581 kg/h, respectively; in which it shows a descending trend. The distribution pattern maps for different seasons were prepared and it was found that the density is decreased from spring to winter with a descending trend of CPUE from 4900 to 2500 kg/h. The catch statistics show that the fishing season including towing depth, position of fishing ground and engine power are the main parameters affecting on amount of catch. Also a comparison between different vessels show that the highest amount of catch belonged to F/V Fanoos-2 with a CPUE of 2233 kg/h higher than the F/V Fanoos-3 with a CPUE of 1893 kg/h; and this value was estimated 1111 & 772 kg/h for vessels Fanoos-5 and Fanoos-6 as the lowest ones. On the other hand, the feeding regime of Pennahia anea was studied. A total of 188 specimens were seasonally collected; and different food indices such as VI, FI, FP, GaSI and food frequency were calculated. The annual mean GaSI was 1.1; and the average VI was 78.7% and the food preference was identified as Fishes (77%, main food), Crustaceans (19%, minor food) and Molluscs (4%). The Trichiurs lepturus (hairtails) were identified as the other main predator including Purple-back flying squid. The aging of Benthosema pterotum was done using sagitta otolith and the mean age was found about 349 days and it was proved that they have a short life span with less than one year old. The growth rate (mmd-1) of lanternfish has negative correlation with increase of body size and body weight.
    Keywords: Fisheries ; Iran ; Oman Sea ; Lanternfish ; Fishing ; CPUE ; Pelagic fishes ; Depth ; Pennahia anea ; Specimens ; Molluscs ; Trichiurs lepturus ; Hairtails ; Benthosema pterotum
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    Review of management and monitoring of two crop shrimp production of Indian white shrimp Fenneropenaeus indicus in intensive culture system in Guatr Shrimp Farm, Sistan & Baloochestan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25312 | 18721 | 2018-09-11 09:00:21 | 25312 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In line with the implementation of two Crop shrimp culture in year in Gwater shrimp Farming Site credits UNDP aims to increase production of crops per year, reducing the days of culture in the second crop using the nursery pond, control feed conversion ratio (FCR) and production management, Farming of Indian white Shrimp P.indicus in 4 private farm was done in 2008. Surveillance and monitoring of these farms, the possible obstacles to the harmful effects of management strengths and weaknesses and develop in the future was done in corporation of Offshore Fisheries Research Center of Chabahar and fisheries of Sistan and Balouchestan. First crop was successful, but the shrimp of Nursery pond and second crop due to the occurrence of white spot disease (WSSV) disease and casualties were died and did not actually do the work. The average minimum and maximum feed conversion in Culture period 1.46 and 1.96 respectively, in C2 _31 and C2 _ 14 farms were observed. Maximum production was 41,376 kg in farm C2 _31. The rainfall on 14 August severe flooding and water supplying cussed suddenly fall down of Inland channel water salinity at day 16-20 the August to 4-5 PPT and the PH go up to 8.8-9. After 2 days the white spot disease in South of site was confirmed and was transferred immediately to the north of site. (The pilots farm) The important thing was that the farm under two crop system as a last resort so that all First crop harvest but shrimp in Nursery pond were infected and with veterinary supervision of all infected ponds were then killed. The results showed that shrimp farming can be done in two periods in year with a predetermined .In this study the only factor that could have adverse effects on the project was Feed supply problems during the growing period and the consequences that it caused low average body weight and final harvested Shrimp resulted to delay in daily growth.
    Keywords: Aquaculture ; Iran ; Sistan and Baloochestan ; Chabahar ; Gwater ; Intensive culture ; Indian white shrimp ; Fenerropenaeus indicus ; UNDP ; Crap culture ; Culture ; FCR ; P.indicus ; Fisheries ; White Spot Disease
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    Stock assessment of the bony fishes of Golestan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25120 | 18721 | 2018-08-26 13:27:08 | 25120 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Total catches of bony fishes in the coastal of south Caspian Sea have been ended to 1554 ton in 1382. The catch of common carp Cyprinus carpio as a one of important commercial species has been lower than others species such as mahisephid, kolmeie and kafal. From commercial catch point of view, the catch of kolmeie is not very important, so that its catch was included only 2% of total bony fish catch in three provinces which are located in south of Caspian sea . In spite of lower common carp catch, in comparison with total bony fish catch in Golestan province more thanb70% catch was belong to Common carp. The higher catch kolmeie among three provinces was related to Guilan with 46% of total catches. Seasonal changes of common carp catch showed maximum and minimum catch were in April 83 and December 82 respectively. The most of (CPUE) was in April 83 and September, October 82. The trend of kolmeie catch showed low fluctuation. Three age groups were specified in kolmeie age composition high and low percent observed in 2 and 3 age groups respectively. Result of biometric information common carp showed most of catch was under standard fisheries catch.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Golestan province ; Stock assessment ; Bony fishes ; Common carp ; Cyprinus carpio ; Species ; CPUE ; Biometric ; Fisheries
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    The biological study of Coregonus lavaretus of the lake of Karaj Dam (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25139 | 18721 | 2018-08-26 16:57:20 | 25139 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Coregonus lavaretus is one the important species of coregonidae family. It has adipose fin and the tail fin has a deep notch. The fish is special for fresh and cold north waters and are mainly found in north hemisphere and north of Europe, Asia and America. It feeds aquatic invertebrate and zooplanktons. The mentioned species has tasteful meat and supplies the major part of fish consumption. The big fishes meat is tasteful, low fat and has a cucumber like odorous characteristics and is mostly consumed in dried and smoked forms. Since this fish is important in inland fisheries and is releasable and developing in water sources of lakes behind dams has been considered and respect to purity of water resources behind dams. In the lake of Karaj dam has been considered as the only habitat and considered to have to low biological information from October to late march 2001 for 6 months totally 82 samples were caught and studied and through this way lack of fishing in the region by determining 11 stations, the samples were collected and grown, relation between length and weight, age and length, propagation, nutrition and fertility parameters were evaluated. Most of caught fishes are 4 to 5 year olds and 3 and 4 year olds. The 4 year olds males were majority and 5 and 6 year olds females formed the dominant group. Correlation relation between age and total length in both sexes (male and female) was very significant at 1% level, of course in females the correlation was around 100%. The weight and total length in males and females that was caught both had high correlation at 1%level; of course this correlation in females had been very stronger than males. % level related to gonad weight and sexual evolution stages of females. Gonad had correlation at 5 the most absolute fecundity had belonged to 5 year old female with 19120 ovules and the lowest to 4 year old breeder. With 11496 ovules the most relative fecundity was 62.13% and belonged to 5 year old breeder and the lowest was 36.06% belonged to 4 year old breeder by increasing the quantity of ovules in breeders the sixth stage of sexual evolution the fecundity rate has been directly increased as well. % of Gonad weight was the most effective factor on absolute fecundity and according to (R2) more than 90 variations of breeders; absolute fecundity is claimable by their gonad weight. Among all traits, affecting gonad weight fecundity the breeders sexual evolution stage has been recognized the most effective factor on fish ovules diameter. Generally in oligotrophic aquatic resources they become mature before the age of 3 and in utroph aquatic resources and full of edible zooplanktons they become mature with 2 years of age. In respect to nutrition this fish eats a broad range of zooplanktons separated from surface to bed of water of dam lake and no kind of selection was seen there so that in different ecological condition it can differ appropriately to kind of foods available in different seasons so that in cold months (December to March) the food diet of this fish varies toward eating water bed living things such as tobifex.
    Keywords: Biology ; Iran ; Karaj Dam ; Coregonus lavaretus ; Species ; Coregonidae ; Aquatic ; Zooplanktons ; Fishes ; Fisheries ; Samples ; Gonad ; Evolution ; Fecundity ; Breeders ; Zooplanktons
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  • 126
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    Stock assessment of zobaidy, Pampus argenteus, in the north of Persian Gulf (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25157 | 18721 | 2018-08-26 17:12:28 | 25157 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The project “Stock Assessment of Zobaidy, Pampus argenteus, in the North of Persian Gulf” started in April 2003 and completed by the end of April 2006 as a cooperative research project to assess the valuable stock of zobaidy shared between Kuwait and Iran in the North of Persian Gulf. The main objectives were to investigate and determine the basic biological parameters, the standing biomass, seasonal abundance, and the impact of regional fishery activities. These studies are necessary to recommend practical management policies and measures for long-term sustainability of the zobaidy stock. The sampling of fisheries data (catch, effort, fish length distributions, and biological data) was started in May 2003 and ended December 2006. Monthly length frequencies data were collected from both the drift gill net and shrimp trawl fisheries. Age determination was based on otolith sectioning, polishing, etching, and staining method. The age groups ranged from 0 to 10 yrs but the dominant age groups were 1-3 years and the estimated parameters for both sexes were L_∞ = 32.0-36.0 cm FL and K = 0.26-0.30 yr^-1, females grow faster than males. Sea survey on board of two dhow boats was carried out using swept area method. Higher abundance was always obtained in Kuwait Bay rather than the other areas surveyed in Kuwait and Khuzestan waters. The total estimated stock biomass in the surveyed areas varied from 42 t in January 2004 to 2,633 t in November 2004, while the Iranian biomass varied from as low as 19 t in October 2005 to 295 t in November 2003. The data indicated that Ras Al-Gaid, Bubiyan Island is the main nursery area in Kuwait waters, while Lifah, Busaif, and Bahrakan are important nursery areas in the Khuzestan waters. Kuwait Bay and Khor Musa are considered important spawning grounds and should be protected. Yield per recruit analysis showed that higher yield could be gained with increasing fish effort, which is not recommended under the present status of high exploitation rate. In contrast, virtual population analysis indicated that future catches will reduce if the fishery continues with present level fishing effort. A reduction of 50% would be required to maintain the present level of catches as well as to enhance the stock biomass. Formulation of a joint advisory management committee would be advisable approach to manage and monitor the zobaidy stock in the region. This will need commitment from the three countries in the region for data collection on regular basis on length frequency, statistics, and biological data. Copepods with high occurence of 64% - 88% is considered as the main item in the Pomfret fish, while jelly fish and other decapods crustaceans are considered as minor items. Observation of pre- flexion stage larvae of pampus genus among the specimens collected from Khuzestan coast water could be considered as an evidence for the spawning of this fish in this region. The occurrence of pampus larvae in Khuzestan coast during the months of June to October has been reported for several times. Examination of 101 specimens (38 from Kuwait, 63 from Iran) for molecular survey does not show any significant differences between Kuwait and Iran water stocks for this fish, so it is possible to hypothesize a unit population for zobidy stock in Persian Gulf and Oman Sea as whole.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Kuwait Bay ; Khuzestan Province ; Pampus argenteus ; Zobaidy ; Stock assessment ; Growth ; Food ; Molecular study ; Biomass ; Fishery ; Sampling ; Survey ; Population
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    Production of fish cheeses from silver carp by acid coagulation (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25162 | 18721 | 2018-08-26 17:33:11 | 25162 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Fish and fishery products have high nutrition value particularly omega-3 fatty acids. It is expected that the estimated production in 2030 will be 150 to 160 million tones but estimated demand will be 183 million tons. Processing of fish especially (culture fish) is one of the way attentions of people to fish and fishery products. Fish Finger, Fish Berger, Cracker, Fish Ball are the most important of fishery products. In this research was studied production of fish cheese from Silver carp (Hypophthalmichthys molitrix) from sarcoplasmic proteins. After primary preparation of fish (beheading, cutting, filleting and deboning) minced fish was washed with salt solution (0.01, and 0.04 mol) and were isolated sarcoplasmic proteins. Acetic acid (%5) and centrifuge were used for sedimentation and extraction of these proteins. Fifteen formulas were worked for preparing of fish cheese. Minced fish, sedimented protein and fish cheese were examinated for proximal parameters (protein, ash. moisture, carbohydrate and lipid) and microbial and chemical spoilage factors (Total Viable Count, Mold and Yeast, Total Volatile Nitrogen, and Peroxide Value). The shelf life and organoleptic characterization of fish cheese were also surveyed. The results indicated that mean of protein, lipid, ash, moisture and carbohydrate in fish cheese were %14/86, %28/01, %3/46, %48/27, %4/78 respectively. The best formula was treatment of 13 with %18/26 of protein. TVN and PV, in fish cheese, were at standard level but after 30 days stored in 4o C, PV value ere slowly increased. Microbial parameters, in product, (in zero time) were log 3 and 4 but after 30 days were log 4 and 5. Organoleptic factors such as odor, frangibility, taste in fish cheese in zero and 30 days were good and medium respectively. Cost of fish cheese was varied between 2000 to 27000 Rails. As fish cheese is prepared from sarcoplasmic proteins and was not any use from fish tissue, therefore it can be produced as secondary products in processing plants and can be introduced to people as new fish product.
    Keywords: Fisheries ; Iran ; Fish cheese ; Sarcoplasmic protein ; Silver carp ; Acid coagulation ; Hypophthalmichthys molitrix
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    Extraction of fatty acid Omega-3 from kilka oil (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25167 | 18721 | 2018-08-26 17:40:46 | 25167 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Kilka fish oil has omega-3 fatty acids and these acids have inhibitory on coronary disease. Unfortunately, any study about improvement use from Kilka oil. In this study, extraction of omega-3 fatty acids from Kilka oil was evaluated in bench scale. Extraction and purification of raw and refinery Kilka oil were done in three temperatures (1 ºC, -5 ºC and -10 ºC) by urea complex method. The results showed that the maximum extraction of fatty acids were in 1oC. Mean of omega-3 extraction in refinery and raw fish oil were29.28% and 26.05% respectively and after extraction and purification were increased to 79.8% and 68.9% and pure maximum of fatty acids were also 80.5% and 69.29%.respectively. The statistical analysis showed that value of omega-3, before and after extraction and purification, have been significant different (p〈0.04 for raw and p〈0.03 for refinery fish oil). Value of C18:3, C20:3 and C22:6 in refinery oil, after extraction and purification, were increased from 2.37%, 6.94%, 19.55% to 7.31%, 18.83% and 53.47% respectively. Value of saturated fatty acids and undesirable menstruated fatty acids with long chain including C16:0, and C18:1, after purification, were decreased from 22.4% and 28.1% to 3.5% and 5.5%respectively. The conclusion showed that fatty acids purification by area complex has had successful and have potential in pilot scales.
    Keywords: Fisheries ; Iran ; Oil fish ; Kilka ; Extraction ; Omega-3 ; Urea complex ; Fatty acid ; Temperature
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    Determination of pollution condition in Babolroud River from viewpoint of pesticides and agrochemicals fertilizers (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25474 | 18721 | 2018-10-02 10:41:14 | 25474 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Babolroud River is one of the important rivers for fisheries and environmental aspect that locared in center part of Mazandaran province. The river has a span of 92 km starting from Albourz mountainous and end up at the southern part of Caspian Sea. This study was done for five months (3rd Feb. through 5th July, 2008) for the better understanding of pollution situation such as organophosphorous, organochlorine pesticides and agrochemical fertilizer that drainage from paddy fields and horticultures to the river. A total of three main sites for pesticides and plus five sub-sites for drainage were selected for observation in three different regions of the river (mountainous, plain and estuary). The organochlorine and organophosphorous pesticides measured by GC (ECD and TSD detectors) with US-EPA (508) and AOAC procedure and agrochemical fertilizer parameters were measured by ASTM method. The maximum concentrations of aldrin, lindane, heptachlor epoxyde, DDE and β- BHC (period 1), δ- BHC and endrin (peiod 2), heptachlor and DDT (period 3), α- BHC (period 3 & 4), dieldrin (period 4) were 6.02, 0.85, 0.51, 0.50, 0.22, 0.35, 0.23, 0.50, 0.46, 0.19 and 0.16 µg/l, respectively. The maximum concentrations of four components of organophosphorous such as Diazinon and Chlorpyrifos (period 1), Malathion (period 2), Azinphos methyl (period 3) were 1.36, 0.46, 0.44 and 2.56 µg/l, respectively. The maximum amounts of tree components of parameters of agrochemichals fertilizers indictor such as total nitrogen (period 2, sub-site 5), total phosphorus and orthophosphate (period 4, sub-site 5) and organo-phosphorus (period 3, sub-site 4) were 5990, 1290, 1220 and 336 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in sediments of the river such as lindane (period 2, site 2), δ- BHC (period 1 site 3), α- endosulfan (period 1, site 2), endrin and heptachlor epoxide (period 2, site 2) and DDE (period 2, site 1) were 0.99 0.54, 0.29, 0.19 and 0.19 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in fish tissue of the river such as endosulfan sulfate, lindane, endrin, δ- BHC and DDE were 0.32, 0.29 0.27, 0.25 and 0.21 µg/l, respectively.
    Keywords: Pollution ; Iran ; Caspian Sea ; Albourz mountainous ; Mazandaran province ; Babolroud River ; Organochlorine ; Organophosphorus Pesticids ; Pollutants ; River Fish ; Sediments ; Pesticides ; Fertilizers ; Fisheries ; α- endosulfan
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    Feasibility study of developing puffed snack from trimmed part of silver carp (Hypophthalmichthys molitrix) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25491 | 18721 | 2018-10-05 06:56:40 | 25491 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Incorporation of silver carp (Hypophthalmichthys molitrix) meat in extruded puffed corn-fish snack was studied. Fish protein concentrate (FPC) was produced by liquid-solid extraction. Ethanol and isopropanol were used as the solvents. FPC extraction efficiency of 19.5% and 9.5% (w/w) were obtained based on fish meat and whole fish respectively. Protein content of isopropanol extracted FPC (93.3%±0.4) significantly (P〈0.05) was higher than ethanol extracted (92.5%±0.3) FPC. On the contrary fat contents were 0.17%±0.4 and 0.65%±0.11 respectively. Puffed corn-fish snack with 2 and 4% FPC as well as 5, 10, 15, and 20% minced fish meat in corn grits was extruded by a single screw extruder. The best formula was evaluated at 15% fish meat and 85% corn grits in the snack base, considering higher protein content, higher consumer acceptability, higher expansion ratio and lower fish smell. Six month storage stability “same as control” was obtained considering chemical, microbial and sensory evaluation according to standard of Institute of Standards and Industrial Research of Iran; when Metalized Biaxillary-Oriented Poly Propylene was used as the packaging material. Incorporation of abdominal muscles (8% of whole fish body which obtained from trimming of fish fillets) on corn-fish snack was not feasible due to low-protein (11.7±0.1 i.e. 34% less than fish meat) and high-fat (14.2±0.1 i.e. 550% higher than fish meat) contents.
    Keywords: Aquaculture ; Fisheries ; Iran ; Snack ; Fish ; Silver carp ; Fish Protein Concentrate ; Extrusion ; Feasibility ; Hypophthalmichthys molitrix
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    Evaluation the tilapia meat freshness during storage in ice and refrigerator by Quality Index Method (QIM) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25500 | 18721 | 2018-10-05 07:49:32 | 25500 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In this study, measurement of freshness fish tilapia species) Nile Tilapia (Oreochromis niloticus) by Quality Index method in whole fish in the 4 treatments and fillets in 6 treatments intended purpose of this research is to measure the qualitative factors (sensory , chemical and microbiological evaluation) and the ratio of 3 to 1 (Ice- fish) ice cover was (mean temperature in fish during the study period between 0.1±0.05 to 0.2±0.1 °C) were kept at cool temperatures for 10 days for the measure fillet Recently, 100 fish (50 pieces, 50 pieces of black and red) and washed her head and tail, the skin and the fillet 30 for each treatment in each treatment 3 Normal packing, vacuum and modified atmosphere (Tilapia fillets treated for red and black tilapia fillets 3 treatment) with an average weight of 114.5±22.50 grams packed and refrigerated at 3°C was maintained. The results showed maximum retention time for fish stomachs empty and whole fish respectively was 9 and 7 days. Also for tilapia fillet freshness in 3 different packaging and stored at -3°C, showed fillet packaged in MAP, has the most lasting, and results by the analysis Statistical was significant .
    Keywords: Fisheries ; Iran ; Tilapia ; Freshness ; MAP ; Modified atmosphere packaging ; Packaging ; QIM ; Quality index method ; Oreochromis niloticus ; Nile Tilapia ; Evaluation ; Meat ; Quality
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    Road-map of aquatic-food processing development of I.R. of IRAN (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25497 | 18721 | 2018-10-05 07:12:46 | 25497 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Scientific and practical planning for achieving the lofty goals of the Islamic Republic of Iran in the framework of development plan of 1404 is the requirement to achieve sustainable development. Establishing roadmap of industries and products was considered by the scientific and technology office of the deputy president, in order to achieve the abovementioned objectives and in line with the national scientific comprehensive map. Therefore, present study was conducted as the roadmap of national aquatic-food processing development using available approved documents e.g. Iran perspective of 1404, fifth developing plan of I.R. of Iran, developing plan of Iranian fisheries organization in 1400 and the available approved statistical data. Current perspective of the aquatic-food processing is presented at the first chapter of the study. The second chapter reviewed the problems and obstacles. Third chapter tabulated the published studies and researches in fish handling and processing so far. Finally fourth chapter recommends executive and research projects considering quantitative and qualitative objectives of Iran 1400 plan as well as fifth developing plan of Shilat-Iran (Iranian fisheries organization). Authors hope the study to be useful in the national planning of I. R. of Iran in the future.
    Keywords: Fisheries ; Management ; Iran ; Road-map ; Aquatic ; Fisheries
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    An investigation of annual discards of the trawlers and gillnet in Khuzestan coastal water, northwest Persian Gulf (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25532 | 18721 | 2018-10-05 15:42:41 | 25532 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The main objective of this study was to describe and estimate the seasonal pattern of discarded fish in the waters of the Persian Gulf coast in Khuzestan. Data were collected from the fishing dhow with Khuzestan Fisheries partnership in fishing areas of Lifeh, Boseif, Khure-mussa and Bahrakan from October 2011 to September 2012. Discarded fish samples were included 109 species from 67 families, nearly 40 percent commercial and 60 percent of non-commercial species. Rayfish and catfish have been observed in most fishing nets. Average sizes of most species particularly bony fish were under 15 cm. The amount of discarded fish per unit of fishing effort was not significantly different between seasons. The highest portion of the catch belongs to rayfishes. Total discarded fishes of gillnets were estimated 3162 tones. Total weight of commercial fishes with small size in discarded fish was estimated 225 tones. The rate and ratio of discarded fish in total catch of gillnet was estimated 0.23 and 0.31 respectively. Chondrichthyes with 12 species and 60% of gillnet catch has the highest percentage of discarded fish of gillnet. High number of commercial species with small size could be due to nursery role of Khuzestan coastal waters. Trawl net has more impact on type and amount of discarded fish than moving gill net. According to different aquatic groups, the highest percentage of protein (77.84±2.088) in Perciformes belongs to Eupleurogrammus muticus and the lowest percentage (40.40±0.322) belongs to Liza klunzingeri, the most percentage of lipid was in Liza klunzingeri (33.78±0.277) and the lowest percentage was in Grammoplites suppositus (3.34±0.025), the highest and lowest percentage of ash (minerals) were in Cynoglossus arel and Acanthocephola abbreviate (28.14±.377) and oligo duvauceli (0.7±0.02) respectively. Therefore discarded fish have great potential in fulfilling nutritional requirements as fresh food (minimally processed) and with nutritional additives in forms of fish powder and fish oil and it can play an effective role in aquaculture development in the region.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Khuzestan coasts ; Discarded ; Species composition ; Fishing ; Net ; Carcass ; Eupleurogrammus muticus ; Liza klunzingeri ; Oligo duvauceli ; Cynoglossus arel ; Acanthocephola abbreviate ; Grammoplites suppositus
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    A survey on black mouth Croaker (Atrobucca nibe) resources in the north-west of Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25531 | 18721 | 2018-10-05 15:27:32 | 25531 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Blackmouth croackers (Atrobucca nibe) resources are the most important commercial stocks in the north-west of Oman Sea, exploited as lantern fisheries by catch with trawlers vessel. At least 50 specimens were sampled monthly from September 2012 to July 2014. Results showed blackmouth croacker have several small peak in gonado-somatic index, but the most frequency of adults occurred in May. The female: male ratio was calculated 1:0.8 and the LM_50 was estimated at 35 cm. The mean of absolute and relative fecundity were estimated 92988 and 223 respectively. LM_50 and LC_50 were calculated and the results showed this species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. The mean of egg diameter for black mouth croaker were calculated at 533±103. Linear model of Fecundity= 9597.6TL-233880 was calculated for length-fecundity relationship . Results of feeding showed lantern fishes (65%), shrimps (11%), Japanese threadfin bream (13%) and the other fishes (11%) were the main feeding regime of black mouth croaker. This species was carnivore, the food prefect mainly consisted of lantern fishes (57.7%) and shrimps (28.2%). The vacuity index (87.7 %) indicated this spices was low appetite fish. Total length range was 18 to 47.5 cm with mean length of 28.7 cm, and the class of 23-24 cm was the most frequent length in fishing ground. The length-weight relationships in A. nibe were calculated for female and male W= 0.0121L2.9385 and W= 0.0075L3.0737 respectively, both have isometric growth. Growth parameters of L_∞ and K were estimated 50 cm and 0.2 y^-1 respectively. Parameters of t0, Tmax and Ǿ were calculated -0.7 year, 14 year and 2.69 respectively. This species have two recruitment period, and the peak of recruitment was occurred in May with 23.14 percent. Total mortality , natural mortality and fishing mortality rates were calculated 0.53 y^-1, 0.46 y^-1 and 0.07 y^-1 respectively. Due to the calculated exploitation rate (0.13), it is appreciated the improvement of black-mouth croaker in the Oman Sea. Base on seasonal and monthly CPUE it was resulted the peak of fishing density were occurred in the winter. Results showed the main distribution of black-mouth croaker concentrated on the continental slope in 200 m depth, but these stocks move to deeper waters (more than 200m) in warm season and extend to shallow waters (less than 200m) in winter.
    Keywords: Biology ; Fisheries ; Iran ; Oman Sea ; Atrobucca nibe ; Reproduction ; Feeding ; Growth Parameters ; Mortality rates ; Exploitation rate ; Distribution ; Survey ; Black mouth Croaker
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    Survey on stocks of Caspian Sea mullets (Liza aurata; Liza saliens) in Iranian coastal waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25565 | 18721 | 2018-10-05 16:56:00 | 25565 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment and Acceptable Biological Catch (ABC) of Caspian Sea mullets in the Iranian coastal waters of Caspian Sea in the fishing season of 2012-2013. For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr, Nowshahr, Babolsar and Torkmen were involved from the start to the end of fishing season.Gathered data Were entered to the computer. For data analysis, common methods were undertaken for estimation of growth parameters, mortality rates, biomass and Maximum Sustainable yield (MSY) and Acceptable Biological Catch (ABC) as well. According to the result, the number of beach seines cooperatives was 124 and fishing efforts were 45260 beach seining haul. The catch per unit of effort CPUE) was calculated 37 kg/haul during this fishing season. The total catches of Caspian Sea mullets (including illegal fishing estimated as 2151 mt. Growth parameters of golden gray mullet (Liza aurata) were estimated as K=0.12 /yr, L_∞=59.24 cm, t_0 = - 1.31 /yr. Based on catch-at-age data, in the fishing season of 2012-2013 , the total biomass, from the biomass-based cohort analysis were estimated 11321.6 mt. The reference points of F0.1 and F30% were estimated 0.3 /yr . based on these results , the fishing mortality rate in fishing season of 20122013 were very closed to these reference points. In this survey , the Maximum sustainable yield and Acceptable biological catch were estimated as 2207.7 and 1981.4 mt respectively .Results of biometry of leaping gray mullet (Liza saliens) showed that the mean length and weight of this species were 28.8 ± 3.4 cm and 230.5±74.8 g respectively. Based on these results and due to decline of golden gray mullet stocks, it is recommanded to reduce fishing effort and harvest keep to the level of MSY and ABC .The study of spawing condition of golden gray mullet in new situation of this species is also recommanded.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Nowshahr ; Babolsar ; Torkmen ; Mullet ; Growth parameters ; Biomass ; Acceptable biological catch ; Survey ; Stocks ; Liza aurata ; Liza saliens ; Mortality rates ; CPUE ; Illegal fishing ; Golden gray mullet ; Spawning
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    Investigation on the effects of different batters on quality of breaded kilka (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25584 | 18721 | 2018-10-07 11:23:15 | 25584 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of this study was investigated to produce of new product using by Caspian Sea Anchovy (Kilka) with different sensory and textural properties .To achievement this purpose, breaded kilka was coated ( row and fried) using with common and Tempora batter. For determination of quality assessment and shelf life, samples were stored at freezer (-18°C). Results showed that frying of Breaded kilka affect total fat content and moisture, so that significant reduction in moisture value and increase in fat content of fried kilka was found in compared with raw breaded kilka (p〈0.05). Protein content of both treatments in compared with fresh fish meat was significantly different. Comparison of four treatments showed that a significant increase in the amount of peroxide, thiobarbituric acid and free fatty acids in fried kilka samples which indicates high fat oxidation during the frying process. Also total count of microrganisms and Coliforms was reduced after frying process. According to ICMSE Standard, all of samples had a high quality at processing time. According to the results, using of Tempora batter improved sensory properties of breaded kilka. Difference of taste, tenderness and adhesiveness of two types of batter in products was significant (p〈 0.05) as the sensory properties of breaded kilka with Tempora batter in compared with common batter were high in different phase of storage. with due attention to progressing of oxidative deterioration in breaded kilka at forth months after production and decreased of sensory properties, we found that the shelf life of row , fried breaded kilka was 3 month at frozen condition (-18°C).
    Keywords: Ecology ; Fisheries ; Iran ; Breaded Kilka ; Tempora batter ; Heating process ; Nutritional value ; Chemical and microbial quality ; Sensory evaluation ; Shelf life ; Investigation ; Quality
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  • 137
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    Providing brood stocks of Caspian trout (Salmo trutta caspius) from Mazandaran Rivers and production of one hundred thousand fries (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25602 | 18721 | 2018-10-07 16:25:19 | 25602 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Caspian trout (Salmo trutta caspius) is one of valuable fishes of the Caspian sea for people living in the Northern coastal area of Iran. Since fish stock and natural resources protection is one the Iranian fisheries research objectives, the most activity on Caspian trout rehabilitation was focused on releasing thousands of smolts in the rivers discharge to Caspian Sea. Catch statistics of this species has declined over last decades thus this study on quality of provided brood stocks and producing fries with suitable quality can help rehabilitation and rearing of this valuable species. Several rivers were considered for providing brooders to keep genetic resources variety of sea stocks. In spawning season 25 (9 male, 16 female) and 30 (5 male, 25 female) brooders were collected from fishermen in Mazandaran rivers and Gyilan coasts provinces respectively. After propagation and larvae rearing, 11500 (10-15 g.) and 50000 (less than 10 g.) juveniles were released in Gyilan and Mazandaran rivers respectively.
    Keywords: Aquaculture ; Management ; Iran ; Caspian Sea ; Mazandaran Province ; Guilan Province ; Caspian trout ; Salmo trutta caspius ; Brood stocks ; Rehabilitation ; Fisheries ; Species ; Rearing ; Genetic ; Propagation ; Juvenile
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  • 138
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    Determination of gill-net selectivity for Narrow-barred Spanish mackerel (Scomberomorus commerson) using morphometric parameters in the coast of Hormozgan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25786 | 18721 | 2018-10-13 08:38:39 | 25786 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this research, size selectivity for narrow-barred Spanish mackerel (Scomberomorus commerson) and other species such as Indo-Pacific king mackerel (Scomberomorus guttatus), Longtail tuna (Thunnus tonggol),Kawakawa (Euthynnus affinis), Talang queenfish (Scomberoides commersonnianus) and John's snapper (Lutjanus johnii) were investigated in mesh sizes of surface, mid-water and bottom drift nets in coastal waters of Bandar Abbas and in the western part of Hormozgan province (fishing ports of Gong and Bustaneh), as well as of catch composition from the fisheries. The data required for the relevant analysis was collected for the years 2012-2014. In order to determine the size selectivity of the investigated species, cumulative probability distributions of retention girth (operculum and maximum girth) at length was used. The results indicated that there is a linear relationship between length (fork length or total length) and transvers morphometric parameters in six positions of girth at fish species. Seven types of gillnets with stretched mesh sizes of 70, 76, 79, 101, 114, 132 and 165 mm and different technical characteristics were investigated for size selectivity of S. commerson, in which the optimal length were 38, 44, 49, 63, 74, 86 and 100 cm FL in the respective meshes. The capture processes of S. commerson was mostly in wedging in the all mesh sizes, whereas in the other species, depending on the morphology of fish, the retention method was different. The comparison of length frequency distribution of kingfish with mean length at maturity (Lm50%) indicated that, depending on mesh size, the frequency of the immature fish in the catch was between 4 and 100%. On the basis of optimal length at mesh size, the minimum legal mesh size of kingfish was estimated as 162 mm. Size selectivity curve was also represented for other species, which depending on fish morphology the model was inadequate in fitting the data. The results from the catch composition showed that the species diversity is different by fishing method. In mesh sizes of 70, 76 and 79 mm, the kingfish was captured in target and bycatch species depending on time by the surface drift gillnet fishery operated by the fishing boats. In this type of gillnet fishery, bycatch accounted for more than half of the total catch in which some of the species was important economically. Catch composition in gillnet fishery operated by dhows was different depending on fishing method. At the first step, it is necessary to impose a ban on gillnets with mesh sizes of 70, 76 and 79 mm in second half of the year. In the next step, for establishing the regulation on minimum legal mesh size of kingfish, it needs to do further study in seas trails aimed at determine the appropriate mesh size. Also, in the multispecies fishery, it is necessary to do a research for optimization of mesh sizes of gillnets and to implement minimum legal mesh size for the main target species.
    Keywords: Fisheries ; Iran ; Hormozgan provivce ; Size selectivity ; Narrow-barred Spanish mackerel ; Optimal length ; Morphometric ; Parameters ; Bycatch ; Scomberomorus commerson ; Gillnet
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  • 139
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    Biomass estimates of Pacific herring, Clupea harengus pallasi, in California from the 1980-81 spawning ground surveys (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/309 | 8 | 2011-09-29 22:15:35 | 309 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The spawning biomass of Pacific herring in San FranciscoBay and Tomales Bay was estimated to be 65,441 tons and 5,583tons, respectively during the 1980-81 season. This is thehighest estimate to date for San Francisco and continuesa rising trend in abundance. The Tomales Bay population hasfluctuated around an annual mean of 6,000 tons since 1973. (24pp.)
    Keywords: Management ; Fisheries ; Pacific herring ; Clupea harengus pallasi ; Tomales Bay ; San Francisco Bay
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  • 140
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    Biological characteristics of the catch from 1984-85 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/327 | 8 | 2011-09-29 22:15:10 | 327 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: In Tomales Bay, 5-, 6-, and 7-yr-old herring, Clupea harengus pallasi, composed 75% by number of the 1984-85 season's catch. In San Francisco Bay, 2-, 3-, and 4-yr-old herring composed 82% by number of the roundhaul catch, and 5-, 6-, and 7-yr-old herring composed 68% by number ofthe gill net catch.The percent of 4-yr-old herring increased to a record high level in the San Francisco Bay gill net catch.Recruitment of 2-yr-old herring into the San Francisco Bay roundhaul fishery was excellent, with 2-yr-old herring composing 41% of the catch.The growth rate of herring improved in both Tomales and San Francisco Bays, after the period of poor growth during the recent El Nino, when the weight of herring averaged 20% below normal.(23pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
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  • 141
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    Biological characteristics of the catch from the 1986-87 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/334 | 8 | 2011-09-29 22:13:42 | 334 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: In Tomales Bay, 4-, 5-, and 6-yr-old herring, Clupea harengus pallasi, composed 85% by number of the 1986-87 season's catch. In San Francisco Bay, 2-, 3-, and 4-yr-old herring composed 88% of the roundhaul catch, and 4-, 5-, and 6-yr-old herring composed 86% by number of the gill net catch.The age composition of both the Tomales Bay and San Francisco Bay gill net catch has shifted to primarily 4-, 5-, and 6-yr-old herring.Recruitment of 2-yr-old herring into the San Francisco Bay roundhaul fishery was good, with the 1985 yr class composing 37% of the catch.The mean length of herring in the San Francisco Bay roundhaul catch decreased to 174 mm BL, and the mean length of the gill net catch decreased to 194 mm BL. The mean length of the Tomales Bay catch also decreased to197 mm BL.Average weight at age of Tomales Bay herring is below average for the fourth consecutive year. In San Francisco Bay the average weight at age is above average, even though length at age declined slightly. (20pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
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  • 142
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    Biological characteristics of the catch from the 1980-81 and 1981-82 Pacific herring (Clupea harengus pallasi) roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/289 | 8 | 2011-09-29 22:17:28 | 289 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The age and size composition of the 1980-81 and 1981-82herring catch in Tomales and San Francisco Bays have remained relatively stable over the past two seasons. TheTomales Bay gill net catch was dominated by 5-, 6-, and 7-yr-old herring which combined for an average of 76% ofthe catch each season. The San Francisco Bay gill netcatch was dominated by 5- and 6-yr-old herring whichcombined for an average of 62% of the catch over the pasttwo seasons. The average size of herring in the gill netcatch declined in San Francisco Bay due to smaller meshnets employed by fishermen late in the season when largeherring are less abundant. (18pp.)
    Keywords: Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
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  • 143
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    An informational summary on elasmobranchs in Elkhorn Slough (2021)
    California Department of Fish and Game, Marine Resources Division | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/379 | 8 | 2011-09-29 22:08:20 | 379 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-29
    Description: Shark angling derbies have been held in Elkhorn Slough since 1946, and archery derbies since about 1973. Elkhorn Slough is an important pupping and breeding area for leopard sharks, Triakis semifasciata, and bat rays, Myliobatis californica, and a spawning or nursery area for many other species of fish. With the establishment of the Monterey BayNational Marine Sanctuary, these derbies, especially the archery derby, have become somewhat controversial.Leopard sharks pup in late spring to early summer, peaking in June.Bat ray pupping peaks in July. Both species breed shortly after pupping.Since 1988, most sharks and rays caught in the angling derbies have been tagged and released under a program developed by Moss Landing Marine Laboratories. No tags have been recovered, suggesting a large population in the area. Prior to the tagging program most sharks and rays taken in the angling derby were rendered at the local tallow works.All sharks and rays that are taken in the archery derby are killed, but relatively few sharks and rays are taken by archers. In 1993,43 sharks and rays were kept by anglers and 13 by archers.The commercial catch of leopard sharks in California averaged 43,000 pounds from 1990 to 1992, and the estimated sport catch of leopard sharks is about 270,000 pounds annually. In comparison, the take during Elkhorn Slough shark derbies is not significant and is not considereda threat to the resource. However, the moral or ethical issue of conducting shark derbies in a marine sanctuary remains. (7pp.)
    Keywords: Fisheries ; Biology ; leopard shark ; Triakis semifasciata ; bat ray ; Myliobatis californica ; Elkhorn Slough ; California ; sport fishing
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  • 144
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    Report for the month of October 1960 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/895 | 8 | 2014-10-02 18:22:42 | 895 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Keywords: Management ; Fisheries ; Biology
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  • 145
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    Report for the month of February 1961 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/899 | 8 | 2014-10-09 19:24:40 | 899 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1-3 and 5-20; p. 4 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 146
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    Report for the month of May 1961 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/902 | 8 | 2014-10-02 18:56:23 | 902 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Keywords: Management ; Fisheries ; Biology
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  • 147
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    Report for the month of August 1961 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/905 | 8 | 2014-10-02 19:04:27 | 905 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1-3 and 5-24; p. 4 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 148
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    Report for the month of December 1961 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/912 | 8 | 2014-10-09 19:25:42 | 912 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1-3 and 5-21; p. 4 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 149
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    Report for the month of September 1961 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/906 | 8 | 2014-10-02 19:05:59 | 906 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Keywords: Management ; Fisheries ; Biology
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  • 150
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    Report for the month of February 1962 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/914 | 8 | 2014-10-02 19:23:21 | 914 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1-3 and 5-18; p. 4 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 151
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    Report for the month of December 1963 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/998 | 8 | 2014-10-02 19:38:31 | 998 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1 and 3-12; p. 2 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 152
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    Report for the month of November 1963 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/997 | 8 | 2014-09-29 20:10:03 | 997 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-04
    Description: PDF includes pp. 1 and 3-16; p. 2 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 153
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    Report for the month of April 1964 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1003 | 8 | 2014-10-06 23:08:55 | 1003 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: Report includes appendices re: Biostatistics Section and Bottomfish Program.
    Keywords: Management ; Fisheries ; Biology
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  • 154
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    Report for the month of August 1964 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1007 | 8 | 2014-10-06 23:25:51 | 1007 | California Department of Fish and Game
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    Publication Date: 2021-07-05
    Keywords: Management ; Fisheries ; Biology
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  • 155
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    Report for the month of February 1965 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1018 | 8 | 2014-10-06 23:38:41 | 1018 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: Report includes appendices re: Tuna Program and Sportfish Program.
    Keywords: Management ; Fisheries ; Biology
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  • 156
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    Report for the month of January 1966 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1027 | 8 | 2014-10-07 19:54:43 | 1027 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: PDF includes pp. 1-13 and 15-27; p. 14 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
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  • 157
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    Report for the month of April 1967 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1051 | 8 | 2014-10-08 21:56:17 | 1051 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Keywords: Management ; Fisheries ; Biology
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  • 158
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    Report for the month of June 1967 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1053 | 8 | 2014-10-08 21:59:24 | 1053 | California Department of Fish and Game
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    Publication Date: 2021-07-05
    Keywords: Management ; Fisheries ; Biology
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  • 159
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    Report for the month of March 1967 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1050 | 8 | 2014-10-08 21:54:46 | 1050 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: Report includes appendices re: MRO Reference Series and CalCOFI Committee.
    Keywords: Management ; Fisheries ; Biology
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  • 160
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    Report for the month of December 1966 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1047 | 8 | 2014-10-07 20:13:51 | 1047 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Keywords: Management ; Fisheries ; Biology
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  • 161
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    Report for the month of August 1968 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1104 | 8 | 2014-10-10 22:39:59 | 1104 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: PDF includes pp. 1-5 and 7-27; p. 6 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
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  • 162
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    Report for the month of May 1968 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1100 | 8 | 2014-10-10 22:34:58 | 1100 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Description: PDF includes pp. 1-5 and 7-24; p. 6 (blank) omitted.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 163
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    Report for the month of October 1968 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1106 | 8 | 2014-10-10 22:45:35 | 1106 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-05
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 164
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    Report for the month of September 1970 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1361 | 8 | 2014-10-14 21:35:47 | 1361 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 165
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    Report for the month of October 1970 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1362 | 8 | 2014-10-14 21:37:22 | 1362 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
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  • 166
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    Report for the month of March 1971 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1367 | 8 | 2014-10-14 22:04:37 | 1367 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 167
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    Report for the month of January 1969 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1338 | 8 | 2014-10-14 21:55:04 | 1338 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendices re: Marine Resources Operations annual report for 1968; and MRO Reference Series.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
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  • 168
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    Report for the month of January 1973 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1448 | 8 | 2014-10-15 22:22:10 | 1448 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendices re: Wildlife Protection Branch; Marine Resources Region annual achievement report for 1972; and MRR publications.
    Keywords: Management ; Fisheries ; Biology
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  • 169
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    Report for the month of February 1973 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1449 | 8 | 2014-10-15 22:23:37 | 1449 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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    Format: 23
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  • 170
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    Report for the month of May 1973 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1458 | 8 | 2014-10-15 22:30:06 | 1458 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendices re: Wildlife Protection Branch and Marine Fisheries Statistics reports.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 171
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    Report for the month of June 1973 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1459 | 8 | 2014-10-15 22:32:39 | 1459 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 29
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  • 172
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    Report for the month of July 1973 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1460 | 8 | 2014-10-15 22:34:46 | 1460 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 173
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    Report for the month of June 1969 (2021)
    California Department of Fish and Game, Marine Resources Operations | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1343 | 8 | 2014-10-10 23:12:17 | 1343 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 174
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    Report for the month of December 1969 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1349 | 8 | 2014-10-14 17:27:07 | 1349 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 175
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    Report for the month of November 1969 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1348 | 8 | 2014-10-14 17:25:33 | 1348 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 176
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    Report for the month of March 1974 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1468 | 8 | 2014-10-20 21:32:47 | 1468 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 177
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    Report for the month of January 1971 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1365 | 8 | 2014-10-14 21:50:03 | 1365 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendices re: Wildlife Protection Branch; MRR Reference Series; and Marine Resources Region annual report for 1970.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
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  • 178
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    Report for the month of July 1971 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1371 | 8 | 2014-10-14 22:13:38 | 1371 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 179
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    Report for the month of September 1971 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1374 | 8 | 2014-10-14 22:15:47 | 1374 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
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  • 180
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    Report for the month of November 1971 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1376 | 8 | 2014-10-14 22:19:31 | 1376 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-07
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 181
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    Report for the month of June 1972 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1410 | 8 | 2014-10-15 18:35:59 | 1410 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: Report includes appendix re: Wildlife Protection Branch.
    Keywords: Management ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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  • 182
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    Channel Islands marine protected areas first 5 years of monitoring: 2003-2008 [Report produced by the California Department of Fish and Game in collaboration with the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO), Channel Islands National Marine Sanctuary, and Channel Islands National Park] (2021)
    California Department of Fish and Game | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/1778 | 8 | 2011-09-29 20:04:23 | 1778 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-10
    Description: The Channel Islands—sometimes called the Galapagos of North America—are known for their great beauty, rich biodiversity, cultural heritage, and recreational opportunities. In 1980, in recognition of the islands’ importance, the United States Congress established a national park encompassing 5 of California’s Channel Islands (Santa Barbara, Anacapa, SantaCruz, Santa Rosa, and San Miguel Islands) and waters within1 nautical mile of the islands. In the same year, Congress declared a national marine sanctuary around each of these islands, including waters up to 6 nautical miles offshore. Approximately 60,000 people visit the Channel Islands each year for aquatic recreation such as fishing, sailing, kayaking, wildlife watching, surfing, and diving. Another 30,000 people visit the islands for hiking, camping, and sightseeing. Dozens of commercial fishing boats based in Santa Barbara, Ventura, Oxnard, and other ports go to theChannel Islands to catch squid, spiny lobster, sea urchin, rockfish, crab, sheephead, flatfish, and sea cucumber, among other species. In the past few decades, advances in fishing technology and the rising number of fishermen, in conjunction with changing ocean conditions and diseases, have contributed to declines in some marine fishes and invertebrates at the Channel Islands. In 1998, citizens from Santa Barbara and Ventura proposed establishment of no-take marine reserves at the Channel Islands, beginning a 4-year process of public meetings, discussions, and scientific analyses. In 2003, the California Fish and Game Commission designated a network of marine protected areas (MPAs) in state waters around the northern Channel Islands. In 2006 and 2007, the National Oceanic and Atmospheric Administration (NOAA) extended the MPAs into the national marine sanctuary’s deeper, federal waters.To determine if the MPAs are protecting marine species and habitats, scientists are monitoring ecological changes. They are studying changes in habitats; abundance and size of species of interest; the ocean food web and ecosystem; and movement of fish and invertebrates from MPAs to surrounding waters. Additionally, scientists are monitoring human activities such as commercial and recreational fisheries, and compliance with MPA regulations.This booklet describes some results from the first 5 years of monitoring the Channel Islands MPAs. Although 5 years is not long enough to determine if the MPAs will accomplish all of their goals, this booklet offers a glimpse of the changes that are beginning to take place and illustrates the types of information that will eventually be used to assess the MPAs’ effectiveness.(PDF contains 24 pages.)
    Keywords: Management ; Ecology ; Conservation ; Fisheries
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  • 183
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    A guide to the Thalassinidea (Crustacea: Malacostraca: Decapoda) of the South Atlantic Bight (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2477 | 403 | 2011-09-29 19:06:51 | 2477 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-13
    Description: Ghost shrimp and mud shrimp in the decapod infraorder Thalassinidea are ecologically important members of manybenthic intertidal and shallow subtidal infaunal communities, largely due to the sediment filtration and mixing that result from their burrowing and feeding behavior. These activities considerably modify their immediate environment and have made these cryptic animals extremely interesting to scientists in terms of their behavior, ecology, and classification.Over 20 years ago, seven species of thalassinideans were known from the South Atlantic Bight (Cape Hatteras, NC to Cape Canaveral, FL). During this study, the examinationof extensive collections from the National Museum of Natural History (NMNH), the Southeastern Regional Taxonomic Center (SERTC), and regional institutions, resultedin the identification of 14 species of thalassinideanscurrently known to occur within this region. The family Axiidae is represented by three species: Axius armatus, Calaxius jenneri, and Paraxiopsis gracilimana; the Callianassidae by six: Biffarius biformis, B. cf. fragilis, Callichirus major, Cheramus marginatus, Gilvossius setimanus, and Necallianassa berylae; the Calocarididae by two: Calocaris templemani and Acanthaxius hirsutimanus; andthe families Laomediidae, Thomassiniidae, and Upogebiidae are each represented by one: Naushonia crangonoides, Crosniera wennerae, and Upogebia affinis, respectively. Anillustrated key is presented for species level identification and supplemental notes on the ecology, distribution, and taxonomy of the species are provided.(PDF file contains 38 pages.)
    Keywords: Ecology ; Management ; Fisheries
    Repository Name: AquaDocs
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  • 184
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    Genetic and morphological identification of pelagic juvenile rockfish collected from the Gulf of Alaska (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2476 | 403 | 2014-02-21 01:10:02 | 2476 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-13
    Description: Pelagic juvenile rockfish (Sebastes spp.) collected in surveys designed to assess juvenile salmonids and other species in the Gulf of Alaska in 1998 and 2000–2003provide an opportunity to document the occurrence of the pelagic juveniles of several species of rockfish. Often, species identification of rockfish is difficult or impossible at this stage of development (~20 to 60 mm),and few species indigenous to Alaska waters have been described. Use of mitochondrial DNA markers for rockfish species allowed unequivocal identification of ten species (S. aleutianus, S. alutus, S. borealis, S. entomelas, S.flavidus, S. melanops, S. pinniger, S. proriger, S. reedi, and S. ruberrimus) in subsamples from the collections. Other specimens were genetically assignable to groups of two or three species. Sebastes borealis, S. crameri, and S. reedi were identified using morphological data. Combining genetic and morphological data allowed successful resolution of the other species as S. emphaeus, probably S. ciliatus (although S. polyspinis cannot be totally ruled out), and S. polyspinis. Many specimens were initially morphologically indistinguishable from S. alutus, and several morphological groups included fish geneticallyidentified as S. alutus. This paper details the characteristics of these pelagic juveniles to facilitate morphological identification of these species in future collections. (PDF file contains 32 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 185
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    Emerging technologies for reef fisheries research and management [held during the 56th annual Gulf and Caribbean Fisheries Institute meeting in Tortola, British Virgin Islands, November 2003] (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2480 | 403 | 2011-09-29 18:56:12 | 2480 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-13
    Description: This publication of the NOAA Professional Paper NMFS Seriesis the product of a special symposium on “Emerging Technologies for Reef Fisheries Research and Management” held during the 56th annual Gulf and Caribbean Fisheries Institute meeting in Tortola, British Virgin Islands, November 2003. The purpose of this collection is to highlight the diversity of questions and issues in reeffisheries management that are benefiting from applications of technology. Topics cover a wide variety of questions and issues from the study of individual behavior, distribution and abundance of groups and populations, and associations between habitats and fish and shellfish species.(PDF files contains 124 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 186
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    Distribution patterns of fish eggs in the U.S. Northeast Continental Shelf Ecosystem, 1977-1987 (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2524 | 403 | 2011-09-29 18:49:44 | 2524 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-25
    Description: This atlas presents information on fish eggs and temperature data collected from broadscale ichthyoplankton surveys conducted off the U.S. northeast coast from ]977 to1987. Distribution and abundance information is provided for 33 taxa in the form of graphs and contoured egg-density maps by month and survey. Comments are included on interannual and interseasonal trends in spawning intensity. Data on 14 additional but less numerous taxa are provided in tabular form. (PDF file contains 316 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 187
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    Field guide to requiem sharks (Elasmobranchiomorphi: Carcharhinidae) of the Western North Atlantic (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2503 | 403 | 2011-09-29 18:58:46 | 2503 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-13
    Description: Identification problems are common for many sharks due to a general lack of meristic characteristics that are typicallyuseful for separating species. Other than number of vertebrae and number and shape of teeth, identifications are frequently based on external features that are often shared among species. Identification problems in the field are most prevalent when live specimens are captured and releasing them with a minimum of stress is a priority (e.g., shark tagging programs). Identifications mustbe accurate and conducted quickly but this can be challenging, especially if specimens are very active or too large to be landed without physical damage. This field guide was designed primarily for use during field studies and presents a simplified method for identifying the 21 species of western North Atlantic Ocean sharks belonging to the family Carcharhinidae (carcharhinids). To assist with identifications a dichotomous key to Carcharhinidae was developed, and for the more problematic Carcharhinus species (12 species), separation sheets based on importantdistinguishing features were constructed. Descriptive text and illustrations provided in the species accounts were developed from field observations, photographs, andpublished references. (PDF file contains 36 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 188
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    Synopsis of biological data on the Nassau grouper, Epinephelus striatus (Bloch, 1792), and the jewfish, E. itajara (Lichenstein, 1822) (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2523 | 403 | 2011-09-29 18:49:02 | 2523 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-25
    Description: Information on the biology, fishery resources, explotiation patterns, management, and conservation status of two species of grouper-the Nassau grouper, Epinephelus striatus, and the jewfish, Epinephelus itajara-is compiled, reviewed, and analyzed. (PDF file contains 68 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 189
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    Investigation of unusual mortalities of bottlenose dolphins along the mid-Texas coastal bay ecosystem during 1992 (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2522 | 403 | 2011-09-29 18:48:59 | 2522 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-25
    Description: An investigation was conducted into the deaths of more than 220 bottlenose dolphins (Tursiops truncatus) that occurred within the coastal bay ecosystem of mid-Texas between January and May 1992. The high mortality rate was unusual in that it was limited to a relatively small geographical area, occurred primarily within an inshore bay system separated from the Gulf of Mexico by barrier islands, and coincided with deaths of other taxa including birds and fish. Factors examined to determine the potential causes of the dolphin mortalities included microbial pathogens, natural biotoxins, industrial pollutants, other environmental contaminants, and direct human interactions. Emphasis was placed on nonpoint source pesticide runoff from agricultural areas, which had resulted from record rainfall that occurred during the period of increased mortality.Analytical results from sediment, water, and biota indicated that biotoxins, trace metals, and industrial chemical contamination were not likely causative factors in this mortality event. Elevated concentrations of pesticides (atrazine and aldicarb) were detected in surface water samples from bays within the region, and bay salinities were reduced to 〈10 ppt from December 1991 through April 1992 due to record rainfall and freshwater runoff exceeding any levels since 1939. Prolonged exposure to low salinity could have played a significant role in the unusual mortalities because low salinity exposure may cause disruption of the permeability barrier in dolphin skin. The lack of established toxicity data for marine mammals, particularly dermal absorption and bioaccumulation, precludes accurate toxicological interpretation of results beyond a simple comparison to terrestrial mammalian models. Results clearly indicated that significant periods of agricultural runoff and accompanying low salinities co-occurred with the unusual mortality event in Texas, but no definitive cause of the mortalities was determined. (PDF file contains 25 pages.)
    Keywords: Ecology ; Management ; Fisheries
    Repository Name: AquaDocs
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  • 190
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    Population characteristics of gulf menhaden, Brevoortia patronus (2021)
    NOAA/National Marine Fisheries Service | Seattle, WA
    In:  http://aquaticcommons.org/id/eprint/2520 | 403 | 2011-09-29 19:00:33 | 2520 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-25
    Description: The status of the Gulf menhaden, Brevoortia patronus, fishery was assessed with purse-seine landings data from 1946 to 1997 and port sampling data from 1964 to 1997. These data were analyzed to determine growth rates, biological reference points for fi shing mortality from yield per recruit and maximum spawning potential analyses, spawner-recruit relationships, and maximum sustainable yield (MSY). The separable virtual population approach was used for the period 1976–97 (augmented by earlier analyses for 1964–75) to obtain point estimates of stock size, recruits to age 1, spawning stock size, and fishing mortality rates. Exploitation rates for age-1 fi sh ranged between 11% and 45%, for age-2 fi sh between 32% and 72%, and for age-3 fi sh between 32% and 76%. Biological reference points from yield per recruit (F0.1: 1.5–2.5/yr)and spawning potential ratio (F20: 1.3–1.9/yr and F30: 0.8–1.2/yr) were obtained for comparison with recent estimates of F (0.6–0.8/yr). Recent spawning stock estimates (as biomass or eggs) are above the long-term average, while recent recruits to age 1 are comparable to the long-termaverage. Parameters from Ricker-type spawner-recruit relations were estimated, although considerableunexplained variability remained. Recent survival to age-1 recruitment has generally been below that expected based on the Ricker spawner-recruit relation. Estimates of long-termMSY from PRODFIT and ASPIC estimation of production model ranged between 717,000 t and 753,000 t, respectively. Declines in landings between 1988 and 1992 raised concerns about the status of the Gulf menhaden stock. Landings have fl uctuated without trend since 1992, averaging about 571,000 t. However, Gulf menhaden are short lived and highly fecund. Thus, variation in recruitment to age 1, largely mediated by environmental conditions, infl uences fi shing success over the next two years (as age-1 and age-2 fi sh). Comparisons of recent estimates of fi shingmortality to biological reference points do not suggest overfishing. (PDF file contains 22 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 191
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    Guide to the Identification of Larval and Early Juvenile Poachers (Scorpaeniformes: Agonidae) from the Northeastern Pacific Ocean and Bering Sea (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2678 | 403 | 2011-09-29 18:36:58 | 2678 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Developmental stages of 22 species representing 16 genera of agonid fishes occurring in the northeastern Pacific Ocean from San Francisco Bay to the Arctic Ocean are presented. Three of these species also occur in the North Atlantic Ocean. Larval stages of nine species are described for the first time. Additional information or illustrations intended to augment original descriptions are provided for eight species. Information on five other species is provided from the literature for comparative purposes.The primary objective of this guide is to present taxonomic characters to help identify the early life history stages of agonid fishes in field collections. Meristic, morphometric, osteological, and pigmentation characters are used to identify agonid larvae. Meristic features include numbers of median-fin elements, pectoral-fin rays, dermal plates, and vertebrae. Eye diameter, body depth at the pectoral-fin origin, snout to first dorsal-fin length, and pectoral-fin length are the most useful morphological characters. Presence, absence, numbers, and/or patterns of dermal plates in lateral rows or on the ventral surfaceof the gut are also useful. Other important characters are the presence, absence, numbers, and ornamentation of larval head spines. Lastly, distinct pigmentation patterns are often diagnostic. The potential utility of larval characters in phylogenetic analysis of the family Agonidae is discussed. (PDF file contains 92 pages.)
    Keywords: Management ; Fisheries
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  • 192
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    Stock Composition of Some Sockeye Salmon, Oncorhynchus nerka, Catches in Southeast Alaska, Based on Incidence of Allozyme Variants, Freshwater Ages, and a Brain-Tissue Parasite (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2683 | 403 | 2011-09-29 18:36:05 | 2683 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: The incidence of four discrete characters of individual sockeye salmon -two genetically inherited proteins (PGM-1*and PGM-2*), freshwater age at migration, and the presenceof the brain-tissue parasite Myxobolus arcticus-in weekly samples from two Alaskan fisheries (Noyes Island in 1986 and Sumner Strait in 1987) were used to infer stockcomposition of the catches based on corresponding character samples from 73 Alaskan and Canadian stocks. Estimated contributions of 13 stock groups, formed on the basis ofcharacter similarity of their members, were roughly consistent with expectations from tagging experiments, knowledge of stock magnitudes, and similar assessments from scales. Imprecision of the estimated contributions by the 13 stock groups limited their practical value; but variability was much reduced for combined estimated contributions by two inclusive categories, namely stock groups whose members had either high or low brainparasiteprevalence. Noyes Island catches consisted predominantly of unparasitized fish, most of which were probably of Canadian origin. The majority of Sumner Strait catches consisted of parasitized fish, whose freshwater origins may have been in Alaska or Canada. (PDF file contains 27 pages.)
    Keywords: Management ; Fisheries
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  • 193
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    Marine Flora and Fauna of the eastern United States: Acanthocephala (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2680 | 403 | 2011-09-29 18:34:45 | 2680 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: The phylum Acanthocephala (intestinal worm parasites of vertebrates) of the Atlantic coast of the United States comprises 43 species and 20 genera belonging to three orders: Echinorhynchida, Neoechinorhynchida, and Polymorphida. Adults are exclusively intestinal parasites of vertebrates. This study includes those species found in vertebrates of marine and estuarine environments along the North American Atlantic coast between Maine and Texas. Species that can be found within that geographical range and those that typically infect freshwater fishes but that are occasionally present in marine or estuarine hosts arealso included. The taxonamy, anatomy, natural history, and ecology of the phylum Acanthocephala are discussed, and an illustrated key to the genera is presented. Techniques, anannotated systematic treatment of all 43 species, and a systematic index are included. No systematic decisions will be made at this time, but areas where such decisions are pending will be indicated and discussed for future reports. (PDF file contains 32 pages.)
    Keywords: Ecology ; Fisheries
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  • 194
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    A Photographic Catalog of Killer Whales, Orcinus orca, frOIll the Central Gulf of Alaska to the Southeastern Bering Sea (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2684 | 403 | 2011-09-29 18:36:02 | 2684 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: In 1992 and 1993, researchers from the National Marine Mammal Laboratory initiated photo-identification studies on Alaskan killer whales, Orcinus orca. Waters from KodiakIsland west to the central and eastern Aleutian Islands and southeastern Bering Sea were surveyed. A total of 289 individual whales were identified. A photographic record of the whales encountered during these surveys is presented. When photographs of the 289 individual whales were compared among various regions in Alaska (Prince William Soundand Southeast Alaska) and areas outside Alaska (British Columbia, Washington, and California), 11 matches were found. The count is conservative because the 1992 and 1993surveys were limited in geographical range, restricted to summer periods, and whales may have been missed along the survey trackline. Future research incorporating both photoidentification studies and line transect surveys will provide reliable abundance estimates of Alaskan killer whales. (PDF file contains 58 pages.)
    Keywords: Conservation ; Management ; Fisheries
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  • 195
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    Ichthyoplankton Adjacent to Live-Bottom Habitats in Onslow Bay, North Carolina (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2682 | 403 | 2011-09-29 18:36:31 | 2682 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: The abundance and distribution of ichthyoplankton adjacent to live-bottom habitats (rock outcroppings containing rich, sessile invertebrate communities and many species oftropical and subtropical fishes) in open-shelf waters « 55-m isobath) in Onslow Bay, North Carolina, were investigated. Larvae of reef-associated genera, especially the economically important subtropical and tropical members of the families Haemulidae (Haemulon), Lutjanidae (Lutjanus and Rltomboplites), Serranidae (Mycteroperca and Epinephelus), and Sparidae (Calamus and Pagrus) were targeted. Larvae representing 40 families were collected in neuston tows. Commonly collected reef-associated families were Balistidae, Blenniidae (dominated by the reef-associated Parablennius marmoreus) , Mullidae, and Gobiidae. Larvae representing 70 families werecollected in subsurface tows. Reef-associated families commonly collected included Apogonidae, Balistidae, Gobiidae, Haemulidae, LutJanidae, Scaridae, and Serranidae. Larval Haemulon sp (p)., Lutjanus sp(p)., and Rltomboplites aurorubens were commonly collected and thus it is likely that these taxa spawn in Onslow Bay and recruit to live-bottom sites within the area. Other families of fishes commonly collected but generally not considered reef-associated included Bothidae, Callionymidae, Carangidae, Clupeidae, Engraulidae, and Ophidiidae. Estuarine-dependent species (e.g. the clupeid Brevoortia tyrannus and the sciaenids Leiostomus xanthurus and Micropogonias undulatus) were an important component of the ichthyoplankton during late fall and winter. The frequent occurrence of larvae fromoceanic species (e.g. gonostomatids and myctophids) indicated that Gulf Stream waters had intruded onto the shelf, transporting these larvae to open-shelf waters off North Carolina.(PDF file containes 36 pages.)
    Keywords: Ecology ; Fisheries
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  • 196
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    The History, Present Condition, and Future of the Molluscan Fisheries of North and Central America and Europe: Volume 3, Europe (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2686 | 403 | 2011-09-29 18:36:00 | 2686 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: (PDF file contains 248 pages.)
    Keywords: Ecology ; Fisheries
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  • 197
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    Biology and Management of Sablefish, Anoplopoma fimbria: Papers from the International Symposium on the Biology and Management of Sablefish, Seattle, Washington, 13-15 April 1993 (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2685 | 403 | 2011-09-29 18:35:51 | 2685 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: At its june 1990 annual meeting, the Technical Subcommittee(TSC) of the Canada-U.S. Groundfish Committee recommended that scientists and managers working on sablefish, Anoplopoma fimbria, issues convene to present and discuss the results of their recent research. Thorough knowledge of the biology and population dynamics of this species is essential for its effective management, especially considering its commercial importance. TSC representatives from both countries recognized that a great deal ofactive research has been conducted on this species since the International Sablefish Symposium was held in Anchorage, Alaska, in March 1983 (Melteff, 1983). As a result of this recommendation, the International Symposium on the Biology and Management of Sablefish (ISBMS) was convened April 13-15, 1993, at the Alaska Fisheries Science Center in Seattle, Washington. (PDF file contains 286 pages.)
    Keywords: Conservation ; Management ; Fisheries
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  • 198
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    The History, Present Condition, and Future of the Molluscan Fisheries of North and Central America and Europe: Volume 2, Pacific Coast and Supplemental Topics (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2687 | 403 | 2020-08-23 23:57:43 | 2687 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Over 100 molluscan species are landed in Mexico. About 30% are harvested on the Pacific coast and 70% on the Atlantic coast. Clams, scallops, and squid predominate on thePacific coast (abalone, limpets, and mussels are landed there exclusively). Conchs and oysters predominate on the Atlantic coast. In 1988, some 95,000 metric tons (t) of mollusks were landed, with a value of $33 million. Mollusks were used extensively in prehispanic Mexico as food, tools, and jewelry. Their use as food and jewelry continues. Except in the States of Baja California and Baja California Sur, where abalone, clams, and scallops provide fishermen with year-round employment, mollusk fishing is done part time. On both the Pacific and Atlantic coasts, many fishermen are nomads, harvesting mollusks wherever theyfind abundant stocks. Upon finding such beds, they build camps, begin harvesting, and continue until the mollusks become so scarce that it no longer pays to continue. They then look for productive beds in other areas and rebuild their camps. Fishermen harvest abalones, mussels, scallops, and clams by free-diving and using scuba and hooka. Landings of clams and cockles have been growing, and 22,000 t were landed in 1988. Fishermen harvest intertidal clams by hand at wading depths, finding them with their feet. In waters up to 5 m, they harvest them by free-diving. In deeper water, they use scuba and hooka. Many species ofgastropods have commercial importance on both coasts. All species with a large detachable muscle are sold as scallops. On the Pacific coast, hatchery culture of oysters prevails. Oyster culture in Atlantic coast lagoons began in the 1950's, when beds were enhanced by spreading shells as cultch for spat. (PDF file contains 228 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 199
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    The History, Present Condition, and Future of the Molluscan Fisheries of North and Central American and Europe: Volume 1, Atlantic and Gulf Coasts (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2688 | 403 | 2011-09-29 18:35:15 | 2688 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: This three-volume monograph represents the first majorattempt in over a century to provide, on regional bases, broad surveys of the history, present condition, and future of the important shellfisheries of North and Central America and Europe. It was about 100 years ago that Ernest Ingersoll wrote extensively about several molluscan fisheries of North America (1881, 1887) and about 100 years ago that Bashford Dean wrote comprehensively about methods of oyster culture in Europe (1893). Since those were published, several reports, books, and pamphlets have been written about the biology and management of individual species or groups ofclosely related mollusk species (Galtsoff, 1964; Korringa, 1976 a, b, c; Lutz, 1980; Manzi and Castagna, 1989; Shumway, 1991). However, nothing has been written during the past century that is comparable tothe approach used by Ingersoll in describing the molluscanfisheries as they existed in his day in North America or, for that matter, in Europe. (PDF file contains 224 pages.)
    Keywords: Ecology ; Management ; Fisheries
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  • 200
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    Ecology of Juvenile Walleye Pollock, Theragra chalcogramma: Papers from the workshop "The Importance of Prerecruit Walleye Pollock to the Bering Sea and North Pacific Ecosystems" Seattle, Washington, 28-30 October 1993 (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2689 | 403 | 2011-09-29 18:35:26 | 2689 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: The Alaska Fisheries Science Center (AFSC), NationalMarine Fisheries Service (NMFS), hosted an internationalworkshop, 'The Importance of Prerecruit Walleye Pollock to the Bering Sea and North Pacific Ecosystems," from 28 to 30 October 1993. This workshop was held in conjunction with the annual International North Pacific Marine Science Organization (PICES) meeting held in Seattle. Nearly 100 representatives from government agencies, universities, and the fishing industry in Canada, Japan, the People's Republic of China, Russia, and the United States took part in the workshop to review and discuss current knowledge on juvenile pollock from the postlarval period to the time they recruit to the fisheries. In addition to its importance to humans as a major commercial species, pollock also serves as a major forage species for many marine fishes, birds, and mammals in the North Pacific region.(PDF file contains 236 pages.)
    Keywords: Ecology ; Management ; Fisheries
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