ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2021-05-19
    Description: In the present study, the effects of Chlorella vulgaris on blood and immunological parameters of Caspian salmon (Salmo trutta caspius) before and after exposure to Viral Nervous Necrosis (VNN) virus were examined. In this regard, four treatments in triplicate were chosen. Groups included one control and 3treatments (T1, T2 and T3). Fish in control group, T1, T2 and T3 were fed diets supplemented with 0, 1×108, 2×107 and 3×106 chlorella/450 g of food respectively, for sixty days. In addition, a virus supernatant was prepared from infected wild golden grey mullet (Liza auratus) and used for virus challenge of S. trutta caspius. Virus was injected intraperitoneally and blood samples were collected before and 14 days after the challenge. Immunological (IgM, C3, C4, total protein, respiratory burst, albumin and lysozyme) and changes in blood parameters (RBC, WBC, Htc, Hb, MCH, MCHC and MCV) were also measured. Results showed that C. vulgaris could act as a natural immunestimulant. Also, the alteration trend in hematological and immunological parameters showed that experimental fish could be considered to be resistant to VNN virus after exposure and fish treated with C. vulgaris were more resistant in comparison to those in the control group. The dose used in T1 (1×108 chlorella/450 g food) was the most effective approach with significant differences.
    Description: Published
    Keywords: Chlorella vulgaris ; Blood parameters ; Immunological parameters ; Salmo trutta caspius ; Viral Nervous Necrosis virus
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.494-510
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2021-05-19
    Description: This study focuses on Anguilliformes specimens revising which collected during 2006-08 in some Iranian museums. For this study, all museum samples from Iranian coastal waters of the Persian Gulf and Oman Sea were investigated. The results indicated that species diversity in the Iranian waters can be classified into six families of Anguiliformes (Eels and Morays fishes). A total of 11 species - consisting of six families have been identified, of these the highest species diversity belongs to the Muraenidae with five genus and eight species. Also, there were two endemic species Muraenesox cienerus (Muraenesocidae) and Gymnothorax undulates (Muraenidae). More than ten rare species were the first report and record from Iranian territorial waters. There are Ichthyapus acuticeps, Synaphobranchus affinis, Strophidon sathete, Rhynomuraena quaestia, Gymnothorax johnsoni, G.kidako, Muraenesox bagio, Pseudoxenomystax albescens, Muraenesox talabonoides, and Conger cinereus cinereus.
    Description: Published
    Keywords: Biology ; Physiology ; Molecular ; Muraenesocidae ; Gymnothorax undulates ; Muraenidae ; Ichthyapus acuticeps ; Synaphobranchus affinis ; Strophidon sathete ; Rhynomuraena quaestia ; Gymnothorax johnsoni ; Muraenesox bagio ; Pseudoxenomystax albescens ; Muraenesox talabonoides ; Conger cinereus cinereus ; Systematic ; Anguilliformes ; Morphology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.407-426
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2021-05-19
    Description: The feeding habits and trophic level of Himantura gerrardi were studied according to sex and size classes of 80 individuals obtained using bottom trawl between May and December 2014 from the Oman Sea. Collected specimens were divided into three size classes (small〈38 cm, medium 38-58 cm and large〉58 cm) based on disk width. Prey was identified in seven main zoological categories, where crustacean and polychaetes were the dominant in diets, indicating this species is a demersal dwelling species. No significant differences were observed between sexes, but size classes showed significant differences in their diets. Also, results showed a decrease in feeding overlap between size classes with an increase in disk width, suggesting that intraspecific competition reduced, which allows the coexistence of different size classes. Trophic level was positively correlated with the disk width, which was lower than 4.0 for both sexes and different size classes, placing it in an intermediate trophic level.
    Description: Published
    Keywords: Dasyatidae ; Himantura gerrardi ; Feeding habits ; Trophic level ; Feeding ; Sex ; Size
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.137-150
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2021-05-19
    Description: Reef-building coral harbor communities of photosynthetic taxa of the genus Symbiodinium (zooxanthellae). The genus Symbiodinium is currently classified into nine genetic clades (A–I). Various corals harbor different Symbiodinium clades; some show specificity to a single strain. Coral and their zooxanthellae are sensitive to environmental stresses. In the Persian Gulf, coral reefs are subject to harsh environmental conditions including extreme temperatures and high salinity. This is the first study to use clade specific primers to clarify the diversity of Symbiodinium in each coral species of Larak Island. For this purpose six coral species were collected at two different locations in Larak Island. After DNA extraction, PCR amplification was performed using clade specific primers. The results showed that multiple Symbiodinium clades are hosted by most coral species. In addition, among thirteen obtained Symbiodinium sequences, the frequency of either tree clades, A, C and D was almost the same. Corals species may contain different clades of Symbiodinium depending on the region and on the tolerance characteristics of each clade. Thus, knowledge of zooxanthellae diversity associated with scleractinian can contribute to a better understanding of the sensitivity of corals to environmental conditions.
    Description: Published
    Keywords: Symbiodinium ; Clade A ; Clade C ; Clade D ; Molecular ; Diversity ; Species ; Coral
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.151-161
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2021-05-19
    Description: The Gorgan Bay is an important ecosystem receiving discharge from their tributaries. In this study, concentration of Pb, Zn, Ni, Fe, Al, Cu and As was seasonally determined at 22 sampling points during 2012-2013.Sediment samples were collected using a Van Veen grab. The levels of heavy metals were determined by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) and AAS (Atomic Absorption Spectrophotometer). The percentages of sand, silt, clay and TOM (Total Organic Matter) in the sediment samples were determined (44.4± 15, 53.4 ± 14, and 2.2± 2.2 and 7.2% ± 1.6, respectively). The results showed that range of Al, As, Cu, Fe, Ni, Pb and Zn in the sediment samples were 0.4-2%, 2.6- 8.6 ppm, 8.1-12.4 ppm, 0.9 – 1.2 % , 11.5-16.8 ppm, 5.9-13.6 ppm and 21.8-28.8 ppm, respectively. In spring, both Al and Ni were higher than the guideline level. In the event that arsenic was exceeds the guidelines in summer. In general, according to the results of EF (Enrichment Factor) and PLI (Pollution Load Index) can be concluded, Gorgan Bay is low risk and not contaminated. According to the results of the nmMDS (non-metric Multidimensional Scaling), PCA (Principal Components Analysis) and the map of distribution of heavy metals, it seems Gorgan Bay are divided into two separate zones (the eastern and the western parts).
    Description: Published
    Keywords: Biology ; Physiology ; Distribution pattern ; Heavy metals ; Sediment
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1144-1166
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2021-05-19
    Description: Marine benthic macrophytes (seaweed and seagrasses) are key structural and functional components of some of the most productive ecosystems of the world. They absorb nutrients through their surface directly from the marine environment and thus they are very important biological elements for the estimation of ecological status, representing reliable indicators of coastal waters. The aim of this study was to assess the ecological status and trophic level of Hormozgan rocky bottoms according to Ecological Evaluation Index (EEI) .Sampling was done bi-monthly at seven stations at the intertidal rocky shores, west of Hormozgan Province. In this study a total of 63 species were identified, of which 15 species from seven genera belonged to green algae; 16 species from five genera belonged to brown algae; and 32 species from nine genera belonged to red algae. Coverage data of macroalgae and EEI indicate a high level of eutrophication for Saieh khosh, and Bostaneh, They are classified as zones with bad and poor ecological status, respectively. Also it has been proved that concentrations of biogenic elements and phytoplankton blooming are higher in these zones. The best values of the estimated metrics at Tahooneh and Michaeil could be explained with the good ecological conditions in those zones and the absence of pollution sources close to those transects. The values of abundance of macroalgae and EEI indicate moderate ecological conditions for Koohin, Lengeh and Chirooieh.
    Description: Published
    Keywords: Saieh khosh ; Bostaneh ; Ecological evaluation index ; Trophic Level ; Inshore waters ; Macroalgae ; Evaluation ; Biological ; Macroalgae ; Seaweed
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.228-238
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2021-05-19
    Description: Scatophagus argus argus (Green Scat) is a pretty aquarium fish. Its hard spines are venomous and can cause painful injury. In this study 60 specimens of Green Scat were collected periodically from coastal waters of Boushehr (south of Iran) from May 2011 to April 2012. Anatomical features of venomous spines were investigated. Scat venom was extracted from the spines in a new manner for keeping the specimens alive. The nature of venom was tested by SDS-PAGE. Ethical issues and animal welfare principles such as rapid and instantaneous anesthetizing, post operation disinfection and fast recovery of the specimens was practiced in order to minimize the complications. This method enhanced the purity and quantity of venom as demonstrated by 12 separated proteins in electrophoresis. New ethical issues were developed to surviving the specimens and prolong viability as well.
    Description: Published
    Keywords: Toxicology ; Scatophagus argus argus ; Venomous spine ; Venom extraction ; Viability ; Ethical issues
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.321-327
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2021-05-19
    Description: We quantified the distribution, abundance and assemblage structure of macrofauna at 22 stations in Gorgan bay, seasonally in 2012-2013. Also, depth, temperature, salinity, DO, TOM and sediment particle size were measured in each station. The highest concentration of TOM was measured near the western littoral zone (10.22) while the mouth part and north-eastern area was characterized by the lowest values (2.65 % and 4.69). A total of 31658 individuals belonging to 12 families and 14 species were identified. Polychaeta with 3 species was the most dominant group in terms of abundance. The four most abundant taxa making up 85% of all specimens were Streblospio gynobranchiata, Tubificidae, Hediste diversicolor and Abra segmentum. The maximum density (7,893 ind/m2) was obtained at station 1 while the minimum (1,777 ind/m2) was observed at station 16. The western area was characterized by the highest species diversity (H', 1.94) and the stations 10, 8 and 7 were characterized by the lowest diversity indices (H', 0.72, 0.77 and 0.87, respectively). The PCA showed that water parameters with more temporary variations had a greater significance in explaining the system variability, and a not marked but evident difference between the two parts of Gorgan Bay was observed and supported by nmMDS test. So Gorgan Bay presents transitional macrobenthic assemblages that are spatially distributed along substrate gradients but it seems that the coastal ecosystem of the south Caspian Sea and mouth-eastern part of Gorgan Bay is very dynamic and some species are forming a metapopulation toward western sites.
    Description: Published
    Keywords: Ecology ; Streblospio gynobranchiata ; Tubificidae ; Hediste diversicolor ; Abra segmentum ; Spatial ; Temporal ; Benthic macrofauna ; Metapopulation ; Abundance ; Structure
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.252-274
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2021-05-19
    Description: Dasyatidae is primarily a marine subfamily, which is most common in shallow tropical waters. The species of this family are distributed worldwide; from tropical to warm temperate; Atlantic (Including the Mediterranean Sea), the Indian, and Pacific Ocean (Nelson, 2006). Six genera, Dasyatis (synonyms Trygon and Urolophoides), Himantura, Pastinachus (synonym Hypolophus), Pteroplatytrygon, Taeniura, and Urogymnus, with about 68 species are included in this family (Compagno, 2005). In the Persian Gulf, some members of family Dasyatidae are important species in terms of number and biomass. This family is represented by three genera (Dasyatis, Himantura and Pastinachus) and seven species, although they have been frequently confused by forms and colors (Vosoughi, 1997; Behzadi, 2006; Last et al., 2012; Moore, 2012a).
    Description: Published
    Keywords: Ecology ; First report ; Mangrove whipray ; Himantura granulata
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1224-1229
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2021-05-19
    Description: Cochlodinium polykrikoides was bloomed in the Persian Gulf for the first time in September 2008, started from the Strait of Hormuz and then spread out towards the northern parts covering most of the areas of the Gulf and lasted 8 months. In order to find out environmental conditions during the bloom, a monthly sampling program was carried out in seven surface stations in 2008-2009. At each station, three samples (triplicates) were collected for phytoplankton analysis and also one sample for environmental analyses, including salinity, chlorophyll a and nutrients. Blooms of C. polykrikoides were observed with a seawater temperature of 20.1 to 31.0 °C, salinity 37.0-40.1 ppt and nutrient concentration ranges during the bloom and red tide were 0.064-0.707 mg/l nitrate + nitrite and 0.001-1.66 mg/l phosphate, respectively. Maximum of C. polykrikoides abundance was measured 26 × 106 cells L-1 in October 2008. Kruscal wallis test demonstrated a significant difference in densities and chlorophyll-a in different months and seasons not in different stations. This study showed increase of temperature (〉31.0 °C) stopped bloom and red tide due to C. polykrikoides in both the eastern and middle sampling stations but in the western stations was determined decrease in nutrient amounts as the major factor therefore increased nutrient of coastal waters, and environmental conditions could have efficacy the occurrence of this dinoflagellate.
    Description: Published
    Keywords: Phytoplankton ; Gymnodiniaceae ; Red tide ; Cochlodinium polykrikoides ; Environmental conditions ; Nutrients ; Temperature
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.475-489
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...