Assessment of Sperm Concentration and Determination of Optimum Sperm to Egg Ratio in Heteropneustes fossilis (Bloch)
نویسندگان
چکیده
منابع مشابه
Seminal vesicle and testis secretions in ž / Heteropneustes fossilis Bloch : composition and effects on sperm motility and fertilization
Ž . Ž . In spawning catfish Heteropneustes fossilis, seminal vesicle SV plasma SVP , testicular Ž . Ž . plasma TP and blood plasma BP all showed considerable differences in physical and chemical Ž . Ž . characteristics. SVP is more viscous 4.61"0.08 centipoise , and its specific gravity 1.06"0.003 Ž y1. and osmolality 277.4"8.32 m osmol kg are significantly higher than BP and TP. SVP has a Ž . ...
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Microcystin is a toxin secreted by cyanobacteria, which are the dominant phytoplankton in eutrophic freshwater bodies. The present study reports histopathological, hematological and biochemical changes in the freshwater fish, Heteropneustes fossilis due to toxicity of microcystin. Toxic effects were observed in liver, kidney, corpuscles of Stannius, gills and gonads. Bilirubin concentration inc...
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The fish consumption has been increasing throughout the world with improved awareness among consumers and culture of fish; an important source of proteinaceous foods for human has become popular during the last few decades in entire Indian subcontinent (Kumar, 2007; Prasad and Kumar, 2007; Saxsena and Garg, 2010). In recent past there has been reports of poor quality fish with high metal conten...
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As far as the detection of metal genotoxicity in fish is concerned, micronucleus (MN) test is considered an extremely suitable measure. In this study, frequencies of micronucleated erythrocytes were scored in peripheral blood of catfish, Heteropneustes fossilis (bloch) after acute in-vivo exposure of zinc at different concentrations (5, 10 and 30 ppm) in the laboratory condition. These three co...
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آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
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ژورنال
عنوان ژورنال: Asian Fisheries Science
سال: 2010
ISSN: 0116-6514,2073-3720
DOI: 10.33997/j.afs.2009.22.4.002