@article { author = {Eskandari, Gh. and Amirinia, S. and Savari, A. and Yavari, V.}, title = {Determination of maturation and spawning season of Otolithes ruber (Croaker Fish) in Khuzestan coastal water, Iran}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {1-22}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116376}, abstract = {In this study, the stage of gonadal development, type and season of spawning of Otolithes ruber in the North West of Persian Gulf were identified. O.ruber maturation and spawning were studied by macroscopic, microscopic, and histologic observation of gonads which obtained from October 1996 to September 1997 in Khouzestan coasts. In the histologic sections of gonad tissue, stages I to VII of gonadal development were distinguished. Post Spawning follicules were observed only in stages VI and VII (in April and May). Atretic ovums were also clearly observed in these stages. Frequency of Ovum diameter distribution in stages II to V is a unimodal which proves that annual maturation of ovums and spawning of this species are simultaneous. The highest level of GSI was observed in March and also higher stages 01' gonadal maturation were observed in March and April. Fast drop in GSI in May and within occurrence of both spawning and spent individuals in only two months of the year shows the relati.....}, keywords = {maturation,Otolithes ruber,Khouzestan coastal water,Iran}, title_fa = {تعیین زمان بلوغ و فصل تخمریزی ماهی شوریده (otolithes ruber)در آبهای ساحلی استان خوزستان}, abstract_fa = {تعیین زمان بلوغ و فصل تخمریزی ماهی شوریده (otolithes ruber)در آبهای ساحلی استان خوزستان }, keywords_fa = {زمان بلوغ,فصل تخمریزی,ماهی شوریده (Otolithes ruber),استان خوزستان}, url = {https://isfj.areeo.ac.ir/article_116376.html}, eprint = {https://isfj.areeo.ac.ir/article_116376_751348a760a2298de0181d27050f576c.pdf} } @article { author = {Bandani, Gh.}, title = {Study on Feeding and Spawning Behavior of Otolithes ruber (Croaker Fish) in Sistan & Baluchestan (Chahbahar) Coasts in 1995, Iran}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {23-34}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116377}, abstract = {Otolithes luber is one of the valuable commercial fishes in thc South coasts of Iran and has been classified at the top level of commercial categorisation, so owing to its economic importance, its biological charactristics were studied in Sistan & Baluchestan coasts in 1995. Three landing called Pozm, Bris and Remin were choosen for commercial catch sampling in this respect and I I I male fish and 149 female ones were outopside within 7 months 01' evaluation. In feeding evaluation through numerical method, Squilla with 42.8% and Engraulidae with 1.4% consisted maximum and minimum percent of male fish stomach contents, respectively, and for female maximum and Illiniruum percent of stomach contents were unidentified bony fishes with 35.7% and polynemidae family with 7%. The results showed that male fishes mature prior tofemales as they are smaller than females and no importante difference was  seen in sexual ratios in various month except March. Spawning was from December to the end of April and an outstanding spawning surge was observed from March to April. However, there was a light surge in November. The least coefficients of fatness in terms of male and female were 0.9 and 1 in April respectively and the most ones were 1.33 for male and 1.20 for female in Januray.}, keywords = {Otolithes ruber,Feeding,SPAWNING,Sistan & Baluchestan,Iran}, title_fa = {بررسی تغذیه و تخم ریزی ماهی شوریده (Otolithes ruber )در سواحل استان سیستان و بلوچستان (چابهار)}, abstract_fa = {بررسی تغذیه و تخم ریزی ماهی شوریده (Otolithes ruber )در سواحل استان سیستان و بلوچستان (چابهار)}, keywords_fa = {تغذیه,تخم ریزی,ماهی شوریده (Otolithes ruber ),استان سیستان و بلوچستان}, url = {https://isfj.areeo.ac.ir/article_116377.html}, eprint = {https://isfj.areeo.ac.ir/article_116377_a7ba82a1272ea8d3063a57dad6b866c3.pdf} } @article { author = {Hallajian, A. and Pourkazemi, M. and Kalbasi, M. and Amini, K.}, title = {An Investigation on the Number of Micropyle Contained in the Ovum of Sturgeon in the South Coast of Caspian Sea}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {35-48}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116378}, abstract = {Determination of the number of ovum micropyle in three sturgeon species had been the main goal of this research. The study was conducted on 44 specimens of female persian sturgeon (Acipencerpersicus), 13 specimens of female Stellate sturgeon (A.stellatus) and 8 specimens of female beluga (Iluso huso). 50 ova were randomly collected and evaluated from each specimen and totally the micropyles of 3250 ova from three sturgeon species were studied. From the 44 specimens of persian sturgeon, 13 belonging to the South-East area of Caspian sea; Golestan province, Shahid Marjani center and 31 of them from the South-West area of Caspian sea; Guilan province, Shahid Beheshti center; including 21 specimenss from the sea and 10 ones from Sefid-rud river. The entire stellate sturgeon specimens and beluga specimens were collected from  Guilan province and Golestan province respectively. Based on achieved from results, the average number of micropyls of persian sturgeon, inhibitant of the eastern part of Caspian sea, was 7.7±1.59 for the western part was 8.7±1.75 and for Persian sturgeon catched from Sefid-rud was 8.3 ± 1.6 in each ovum. Based on evaluation and statistic comparison, no significant difference (P>0.95) was observed between presian sturgeon of the East and West part, in terms of micropyle number. The average number of micropyle of stellate sturgeon was 4.7±1.51 and for beluga was 5.19±1.59 in each ovum. The average diameters of outer membrane micropyle of ovum in A.Persicus, A.Stellaus and Huso huso were 21.97±1.05 micron, 21.5±1.2 micron and 22.1±0.7 micron respectively; and the average diameters of inner membrane micropyle of ovum were 18.82±1.1 micron, 17.4±1.6 micron and 18.6±1.7 micron respectively.}, keywords = {micropyle,ovum,Sturgeon,Caspian Sea}, title_fa = {بررسی تعداد میکروپیل در تخمک سه گونه از تاسماهیان جنوب دریای خزر}, abstract_fa = {بررسی تعداد میکروپیل در تخمک سه گونه از تاسماهیان جنوب دریای خزر}, keywords_fa = {میکروپیل,تخمک,تاسماهیان,جنوب دریای خزر}, url = {https://isfj.areeo.ac.ir/article_116378.html}, eprint = {https://isfj.areeo.ac.ir/article_116378_005ab4a00391e6ee579bb36b2bb0646c.pdf} } @article { author = {Ramin, M.}, title = {Artificial Spawning of Esox lucius (Pike), Culturing Fingerling Size Fish, Providing Bio-normative}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {49-58}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116379}, abstract = {The research project was implemented to obtain bio-normative of artificial spawning of Esox lucius and rear fries until fingerling size in earthern ponds. The artificial spawning occured in 4 stages, totally 96 brooders (32 females and 64 males) were used for the experiments. The pituitary gland hormon of common carp was injected at 4-7 mg per kg of body weight in each dose to the spawner females. The water temperature during spawning was 8-150C and the time of artificial spawning started from 4 of February to 20 of March. The maximum weight of brooder was 4 kg and the minimum 0.75 kg; the oldest female fish brooder was 6 years old and the male 5 years; the minimum age for both sexes was three years. The spawning took place both by natural state in earthern ponds and also by eggs extraction and fertilization. The quantity of eggs extracted from female spawner composed between 10-20 percent of the body weight. There was no significant differences between one and two step hormon injections. The injected female brooder was ready for artificial spawning 48-74 houre later  Mean incubation period lasted 120 degree days and yolk sac absorbtion lasted 160-180 degree days. The eggs stickness was rather high and the rate of fertilization fluctuated between 45-85%. One gram dry eggs contain 90-150 ovum with 1.5-2 mm diameter, and swelled eggs were 70-85 pieces with 2.5-3.5 mm diameter. Absolute, relative and working fecundity calculated 22400-112000, 19760-36920and 5200-67400 eggs respectively. Larvae feeding, after yolk sac absorbtion, was performed with a solution of dry milk and soya bean juice. The feeding first was conducted with soya bean juice and Artemia nauplius in earthern ponds. After wards the natural productions of the pond, having been enriched with chicken manure, were used. The survival rate, from larvae to fingerling size, was 20-22% during 50 days culture period. During this time the fly grew to 7.4 gr with 8.5 cm length, in average.}, keywords = {artificial spawning,Esox lucius,bio-normative}, title_fa = {تعیین زی فن تکثیر مصنوعی اردک ماهی (Esox lucius ) و پرورش آن تا مرحله انگشت قد}, abstract_fa = {تعیین زی فن تکثیر مصنوعی اردک ماهی (Esox lucius ) و پرورش آن تا مرحله انگشت قد}, keywords_fa = {زی فن,تکثیر مصنوعی,اردک ماهی (Esox lucius ),مرحله انگشت قد}, url = {https://isfj.areeo.ac.ir/article_116379.html}, eprint = {https://isfj.areeo.ac.ir/article_116379_3a7d4ed3dc1edd0e39197eb8c04d783c.pdf} } @article { author = {Sayad Bourani, M.}, title = {Some Biological Survey of the Clupeonella engrauliformis (Anchovy-like Kilka) in Guilan Coastal Region, the South-West of Caspian Sea, in 1996-97}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {59-70}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116380}, abstract = {According to a survey in 1996, among three species of kilka, living in the South-West of Caspian sea, anchovy-like kilka composes 90.3% of total kilka catch. In all seasons of a year, anchovy-like kilka, in the second stage Of gonadal maturation, shows higher abundance in the catch, compared with other maturation stages. This indicates anchovy-like kilka shows more positive phototaxis, at the begining of its sexual maturation.Sex ratio shows females dominancy is 54.8-60, 7-75.9 and 82 percent in spring, summer, autumn and winter respectively. The average length of this fish in the four seasons with above order were 98.6±10.8, 97.7±10.3, 99.6±10.6, 100.1 ± 10.6 and the mean weight were 8.24±1.1, 7.5±1.7, 7.3±1.96 and 6.9±1.56 gr. The age composition of anchovy caught on spring in 1997 ranged between 2-5 years old and the dominate group was 3-year-old. The K value and infinite length calculated 0.27 and 147.8 mm respectively. No significant differences were observed between male and female concerning fat reserve and feeding intensity.}, keywords = {Kilka,CLUPEONELLA ENGRAULIFORMIS,Caspian Sea,Iran}, title_fa = {بررسی برخی از ویژگیهای زیستی کیلکای آنچوی( Clupeonella engrauliformis )در آبهای گیلان}, abstract_fa = {بررسی برخی از ویژگیهای زیستی کیلکای آنچوی( Clupeonella engrauliformis )در آبهای گیلان }, keywords_fa = {ویژگیهای زیستی,کیلکای آنچوی( Clupeonella engrauliformis ),آبهای گیلان}, url = {https://isfj.areeo.ac.ir/article_116380.html}, eprint = {https://isfj.areeo.ac.ir/article_116380_efb5abe5289b815ccdc62e7e5c711b0f.pdf} } @article { author = {Kamrani, E. and Behzadi, S.}, title = {Reproduction Biology of Penaeus merguiensis (Banana Prawn) Emphesis of Fecundity in Coastal Waters of Hormozgan Province, Iran}, journal = {Iranian Scientific Fisheries Journal}, volume = {8}, number = {1}, pages = {71-83}, year = {1999}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1026-1354}, eissn = {2322-5998}, doi = {10.22092/isfj.1999.116381}, abstract = {Penaeus merguiensis is the dominant species in costal waters of Hormozgan province and approximately consitute 70% of the annual catch composition. Sex rate is analysis in natural population shows that the proportion of males to females is 1:1 and generally this proportion in carapace length is 28.6 and 25.7 mm more than other classes, which its peak is observed in 25.7 mm length class. Also proportion of males to females in May to December and April to May is more than other times which its peak is in December. The analysis of sexual maturation based on carapace length shows that LM50 for females of this species has followed the exponential equation and is equal to 32.8 mm (r2 = 9()%). Minimum and maximum of absolute fecundity of this species with 20.7-31.5 mm C.L. are and 11300 and 14400 eggs respectively. This analysis of relative fecundity of this type showed that the relationship between carapace length and number of eggs was a type of poweral equation (F= 0.1208 C.L 3.8, r2 = 97%), however this relationship between total  length (T.L) and wet weight (W) was F = 0.0002 T.L 7.1 (r 2= 0.68) and F= 0.1942 W 4.02 (r2=0.58), respectively, which showed the fecundity has 0.1942 W (r more correlation with the carapace length.}, keywords = {REPRODUCTION BIOLOGY,Penaeus merguiensis,Hormozgan province,Iran}, title_fa = {زیست شناسی تولید مثل میگوی موزی( Penaeus merguiensis )با تاکید بر هماوری در آبهای استان هرمزگان}, abstract_fa = {زیست شناسی تولید مثل میگوی موزی( Penaeus merguiensis )با تاکید بر هماوری در آبهای استان هرمزگان }, keywords_fa = {زیست شناسی,تولید مثل,میگوی موزی( Penaeus merguiensis ),هماوری,استان هرمزگان}, url = {https://isfj.areeo.ac.ir/article_116381.html}, eprint = {https://isfj.areeo.ac.ir/article_116381_780ea2cf2cb05a5739e27919d7c4d812.pdf} }