@article { author = {Ahmadi, M.R. and Safi, Sh. and Bjerkeng, B. and Gerami, A. and Ranaii Siadat, S.O. and Khodarahmi, R.}, title = {Caspian Sea gamarus (Pontogammarus maeoticus) as a carotenoid source for muscle pigmentation of rainbow trout (Oncorhynchus mykiss)}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {1-12}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114823}, abstract = {The red coloration of rainbow trout muscle is an important quality criterion. Duplicate groups of rainbow trout (Oncorhynchus mykiss; initial weight of 200±10g) were fed diets either supplemented 0 (control), 0.5, 2, or 4%, of the Caspian Sea gammarus (Pontogammarus maeoticus) respectively as a prospective alternative carotenoid source. The feeding trial lasted for 39 days. No significant differences (p < /em>>0.05) in specific growth rate (SGR), or condition factor (CF) were found between treatments. Carotenoid concentrations were determined in the dorsal region and the Norwegian Quality Cut (NQC). The correlation between mean total carotenoid content of the Norwegian quality cut per treatment and dietary inclusion level of P. maeoticus was high (R2=0.99; p < /em><0.01). Less correlation was found between total carotenoid content of the dorsal cut and inclusion level of P. maeoticus (R2=0.80; P=0.10). The total carotenoid concentrations were significantly higher (p < /em><0.05) in male (4.26±0.39 mg/kg) than in female (3.38±0.23 mg/kg) rainbow trout. In conclusion, it was found that dietary supplementation of the Caspian Sea gammarus at levels of 2 and 4% effectively improved muscle pigmentation of rainbow trout. }, keywords = {Rainbow trout,Pigmentation,Gammarus,Caspian Sea,Iran}, url = {https://jifro.areeo.ac.ir/article_114823.html}, eprint = {https://jifro.areeo.ac.ir/article_114823_f43f5a99790faba00ea95d3f0dcf29ca.pdf} } @article { author = {Ebrahimi, M.}, title = {17α-Hydroxy-4-pregenen-3-one (17 αP) assay, using acetylcholinesterase enzyme as tracer}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {13-28}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114824}, abstract = {17a-hydroxy-4-pregnen-3-one (17aP) hormone is a precursor of other steroid hormones and radioimmunoassay has already been used to measure it, but a simple and rapid &quot;Enzyme Linked Immunosorbant Assay&quot; (ELISA) is described and validated here. A general procedure for prepara-tion of the acetylcholinesterase labelled steroid is described, which is applicable to any steroid. Use of acetylcholinesterase tracer increased the sensitivity of assay so that reliable measurements of each steroid could be achieved with only 10 ml of plasma. The ELISA was applied to measure 17, 20a-hydroxy-4-pregnen-3-one (17, 20aP) steroid production from 17aP by 20 a-hydroxy steroid dehydrogenase (20a-HSD) from sperm of roach (Rutilus rutilus). The results showed that cyprinid sperm contains potent and active 20a-HSD enzymes which produce 17, 20aP hormone from 17aP substrate. }, keywords = {17-hydroxy-4-pregnen-3-one assay,ELISA,Steoids,TEROIDS,Acetylcholinesterase,roach}, url = {https://jifro.areeo.ac.ir/article_114824.html}, eprint = {https://jifro.areeo.ac.ir/article_114824_8fe12ac31f170853eb280ea180d726d4.pdf} } @article { author = {Kohinoor, A.H.M. and Islam, M.S. and Thulsted, S.H. and Wahab, M.A.}, title = {Rerproductice biology of three important indigenous small fish viz., mola ( INDIGENOUS SMALL FISH VIZ., MOLA (Amblypharyngodon mola), Chela (Chela cachius) and punti (Puntius sophore)}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {29-48}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114825}, abstract = {Reproductive biology of three important small indigenous fish species mola (Amblypharyngodon mola), punti (Puntius sophore) and chela (Chela cachius) was studied for 12 months from January to December, 1999 in the Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh. Gonadosomatic index (GSI) and ova diameter were analysed to determine their reproductive cycle. Three hundred sixty female and one hundred forty four male samples of each species of fish, mola (Amblypharyngodon mola), punti (Puntius sophore) and chela (Chela cachius) were examined in this study. The GSI values for female mola, punti and chela ranged from 1.78±0.88 to 17.06±2.66, 1.16±0.64 to 24.81±1.50 and 1.34±0.64 to 10.19±2.17, respectively. The highest values of the GSI in mola and punti were obtained during July while that of chela, during June. The results of monthly observations on the ova diameter indicated that mola, punti and chela spawned at least twice a year, once during May-July and again during September-October.}, keywords = {Reproductive biology,Mola (Amblypharyngodon mola),Chela (Chela cachius),Punti (Puntius sophore),GSI,Ovadiamter,Bangladesh}, url = {https://jifro.areeo.ac.ir/article_114825.html}, eprint = {https://jifro.areeo.ac.ir/article_114825_f9861fd5d379ef1eb7ba9d525186939f.pdf} } @article { author = {Mirzajani, A.R. and Kiabi, B. and Nezami, S.A.}, title = {Some ecological indices of the Caspian Sea Amphipoda at the different depths Guilan offshore}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {49-62}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114826}, abstract = {In the present study, some ecological factors were studied for Amphipoda at different depths. The Shannon, Margalef, and Hill indices were used to determine the  species diversity, richness and evenness, respectively. In addition, the association and niche overlap values were estimated. Indices of species richness and diversity were highest at 50 and 100m depths, respectively.  The ordination of depths show that the highest dissimilarity was at 20m depth and the lowest dissimilarity at 100 meter.  Results of interspecific association and specific overlap of species show that only a few species could have similar ecological requirements. Results show that Paraniphargoides derzhavini with Niphargoides grimmi and Stenogammarus compersus with Amathilina  cristata  had low associations.  Corophium spinulosum with Corophium nobile and Stenogammarus compersus with Paraniphargoides derzhavini, however, had high associations.}, keywords = {Amphipoda,diversity,Interspecific association,Caspian Sea,Iran}, url = {https://jifro.areeo.ac.ir/article_114826.html}, eprint = {https://jifro.areeo.ac.ir/article_114826_cfb0b610fbed6afef09aca6fc757c1e1.pdf} } @article { author = {Moajazi Amiri, B. and Bahrekazemi, M. and Pousti, I. and Vilaki, A.S.}, title = {A Histological study on the development of the digestive tract of Caspian salmon, Salmo trutta caspius (Kessleri), from hatching to parr stage}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {63-84}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114827}, abstract = {Histological development of digestive tract of the Caspian salmon, Salmo trutta caspius, from hatching to 6 month post-hatching was studied using light microscope. The digestive tract of newly hatched larvae was a simple, undifferentiated tube which continued from mouth to anus. In 10 days post hatching larvae, the alimentary canal became more differentiated and secretion was started activity, with appearance of goblet cells in epithelium of the mouth, pharynx and esophagus. A thin layer of neutral mucopolysaccharid components covered the digestive tract&#39;s epithelium in this stage. At the onset of exogenous feeding (25 days post hatch, dph, at 70C), the digestive tract became completely differentiated into mouth, pharynx, esophagus, glandular and non-glandular stomach, primary pyloric cacea, anterior and posterior parts of the intestine and rectum, similar to those of juveniles and adults. The alimentary canal was structurally completed and lined by a stratified squamous epithelium in the mouth, pharynx and rudimentry part of the esophagus at 25 dph, while the terminal part of esophagus, the stomach and the intestine were lined by a columnar epithelium. During this period, striated muscle layer became distinct from mouth to esophagus, while smooth muscle layer was appeared at the stomach and intestine. This pattern did not change up to six month post hatch, except in development of the digestive organs. Histological analysis of the present study prepare some basic scientific knowledge on the Caspian salmon&#39;s digestive histology which may be used in further studies on digestive system, such as histochemical studies.}, keywords = {Histology,Parr,Digestive tract,Caspian salmon}, url = {https://jifro.areeo.ac.ir/article_114827.html}, eprint = {https://jifro.areeo.ac.ir/article_114827_06a8fde2c9341ad002321bf376943525.pdf} } @article { author = {Shariati, M.T.}, title = {The attitude of fishermen towards stock enhancement and influencing factors: a case study in Guilan Province of Iran}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {85-104}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114828}, abstract = {Decline in aquatic resource stocks, occurs for various reasons. Although regulations and measures have proven useful, they have failed to inhibit effectively the stock reduction trends. Iranian Fisheries Organization has carried out a great deal of investments and efforts concerning the enhancement of the Caspian Sea resource stocks through the restrictive regulations, and reproduction and release of various species such as bony fish and sturgeon. Nevertheless, reports of low catch of fish by fishermen and illegal fishing of even released fry have made serious concerns. Consequently, the existing approaches and practices have been questioned. However, resource management is facing a lack of proper understanding of society’s behaviors and attitudes towards the resource conservation and management. It is hard to study behavioral changes, but measuring of attitudes toward the natural resources conservation or enhancement, as well as the factors influencing the interest and commitment towards it, seems to be a prerequisite of any plan or program in that regard. The present study measures the fishermen’s attitude by means of Fishbein- Ajzen’s model as important and vital theory of behavior–attitude explanation. Variables such as evaluation of outcome, expectation of outcome or belief, satisfaction of and contribution in stock enhancement, as well as influenced factors including; personal characteristics, experience, amount of catch, and awareness were examined. In this descriptive analytical research, 180 samples out of the whole 5645 fishermen of the bony fish, in seven coastal towns of the Guilan province, were interviewed through a questionnaire. The study showed a significant positive attitude toward stock enhancement with 95% confidence. They included fishermen who were literate, more informed, with higher catches, and also who were content with their occupation. However, there was no significant relation between the fishermen&#39;s attitude and other factors such as age, experience, and opinions about the restrictive measures.}, keywords = {Attitude,Fishermen,Stock Enhancement,Guilan,Iran}, url = {https://jifro.areeo.ac.ir/article_114828.html}, eprint = {https://jifro.areeo.ac.ir/article_114828_36b0c0d05ad8fa28ce361b6fd5169467.pdf} } @article { author = {Ebrahimzadeh Mousavi, H.A. and Khosravi, A.R. and Firouzbakhsh, F. and Mokhayer, B. and Sasani, F. and Mirzargar, S.S. and Rostami, M.}, title = {Short communication: A case report of Branchiomyces infection in common carp (Cyprinus carpio) from Iran}, journal = {Iranian Journal of Fisheries Sciences}, volume = {5}, number = {1}, pages = {105-112}, year = {2005}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2018.114829}, abstract = {This article has no abstract.}, keywords = {CARP,Branchiomyces,Gill,Histopathology}, url = {https://jifro.areeo.ac.ir/article_114829.html}, eprint = {https://jifro.areeo.ac.ir/article_114829_38af81d56d2a374d97b234aca1215a67.pdf} }