Application effect of micropore aeration technique in rearing process of summer fingerlings of Silurus asotus from Poyang lake was studied. This study provides an efficient safe aeration solution for large-scale finge...Application effect of micropore aeration technique in rearing process of summer fingerlings of Silurus asotus from Poyang lake was studied. This study provides an efficient safe aeration solution for large-scale fingerling rearing of Silurus asotus.展开更多
In this study, the susceptibility of S. asotus Linnaeus from Poyang Lake to several common pesticides was investigated. The results showed that S. aso- tus Linnaeus from Poyang Lake was susceptible to cypermethrin, an...In this study, the susceptibility of S. asotus Linnaeus from Poyang Lake to several common pesticides was investigated. The results showed that S. aso- tus Linnaeus from Poyang Lake was susceptible to cypermethrin, and the 48 h minimum lethal concentration ranged between 0.063 - 0.069 mg/L. This study pro- vided reference for scientific medication and development of commercial production of S. asotus Linnaeus in Poyang Lake.展开更多
[Objective] The research aimed to provide technical basis for fry rearing of Silnrus asotus in Dongting Lake.[Method] The induced spawning medicine was used in the experiment to conduct artificial induced spawning and...[Objective] The research aimed to provide technical basis for fry rearing of Silnrus asotus in Dongting Lake.[Method] The induced spawning medicine was used in the experiment to conduct artificial induced spawning and fertilization for obtaining round green fertilized eggs.According to embryonic development,the morphological characteristics of embryo at different developmental stages were recorded detailedly through microscope.[Result] The embryonic development of Silnrus asotus in Dongting Lake was divided into 7 stages,namely, blastoderm stage,cleavage stage, blastula stage, gastrula stage,neurula stage,organogenesis stage and pre-hatching stage.After hatched for 37 h 20 min in water at 22-24 ℃, fries were come out.[Conclusion] The time sequence of Silnrus asotus in Dongting Lake was basically similar to that of other catfish,while its hatching time was shorter than that of other fish in Siluriformes.展开更多
[ Objective] The cold shock method was used to induce diploid gynogenesis of Silurus astus. [ Mthod ] The Silurus astus sperms were irradiated by ultraviolet, then conducted for fertilization. The different cold shock...[ Objective] The cold shock method was used to induce diploid gynogenesis of Silurus astus. [ Mthod ] The Silurus astus sperms were irradiated by ultraviolet, then conducted for fertilization. The different cold shock starting time and duration were set to observe diploid gynogenesis of Silurus astus. [ Result] Under such inducing condition that ultraviolet irradiated 15 min,cold shock started 5 rain after fertilization, and cold shock duartion was 40 rain,the survival rate of diploid Silurus astus reached the highest（8.5% ）. [ Conclusion] The experiment laid foundation for culturing new excellent Silurus astus variety and accumulated original files tor further study of gynogenesis development mechanism.展开更多
基金Supported by Science and Technology Support Program of Jiangxi Province(20121BBF60037)
文摘Application effect of micropore aeration technique in rearing process of summer fingerlings of Silurus asotus from Poyang lake was studied. This study provides an efficient safe aeration solution for large-scale fingerling rearing of Silurus asotus.
基金Supported by Science and Technology Support Program of Jiangxi Province(20121BBF60037)
文摘In this study, the susceptibility of S. asotus Linnaeus from Poyang Lake to several common pesticides was investigated. The results showed that S. aso- tus Linnaeus from Poyang Lake was susceptible to cypermethrin, and the 48 h minimum lethal concentration ranged between 0.063 - 0.069 mg/L. This study pro- vided reference for scientific medication and development of commercial production of S. asotus Linnaeus in Poyang Lake.
文摘[Objective] The research aimed to provide technical basis for fry rearing of Silnrus asotus in Dongting Lake.[Method] The induced spawning medicine was used in the experiment to conduct artificial induced spawning and fertilization for obtaining round green fertilized eggs.According to embryonic development,the morphological characteristics of embryo at different developmental stages were recorded detailedly through microscope.[Result] The embryonic development of Silnrus asotus in Dongting Lake was divided into 7 stages,namely, blastoderm stage,cleavage stage, blastula stage, gastrula stage,neurula stage,organogenesis stage and pre-hatching stage.After hatched for 37 h 20 min in water at 22-24 ℃, fries were come out.[Conclusion] The time sequence of Silnrus asotus in Dongting Lake was basically similar to that of other catfish,while its hatching time was shorter than that of other fish in Siluriformes.
基金the Key Technology Research (0324030026)Development Program of Henan Province and Key Programs of Zoology of Henan Province~~
文摘[ Objective] The cold shock method was used to induce diploid gynogenesis of Silurus astus. [ Mthod ] The Silurus astus sperms were irradiated by ultraviolet, then conducted for fertilization. The different cold shock starting time and duration were set to observe diploid gynogenesis of Silurus astus. [ Result] Under such inducing condition that ultraviolet irradiated 15 min,cold shock started 5 rain after fertilization, and cold shock duartion was 40 rain,the survival rate of diploid Silurus astus reached the highest（8.5% ）. [ Conclusion] The experiment laid foundation for culturing new excellent Silurus astus variety and accumulated original files tor further study of gynogenesis development mechanism.
