温度对瓦氏黄颡鱼胚胎发育的影响  

Effects of temperature on embryonic development of the darkbarbel catfish Pelteobagrus vachelli

作　　者：袁伦强[1] 谢小军[1] 曹振东[2] 罗毅平[1] 

机构地区：[1]西南师范大学水产科学研究所,重庆400715 [2]重庆师范大学生物系,重庆400047

出　　处：《动物学报》2005年第4期753-757,共5页ACTA ZOOLOGICA SINICA

基　　金：国家自然科学基金项目(No.30371121);重庆市科委攻关项目(No.20027378)~~

摘　　要：The eggs of Pelteobagrus vachelli were fertilized artificially at 23℃,from parental fish collected in the Jialing River,on May 23,2004.The embryonic development was observed at nine experimental temperatures,i.e.eight constant temperatures(17,19,21,23,25,27,29 and 31℃)and a varying temperature(from the blastoderm to the blastula stage at 23℃,from gastrulae to the neural plate stage at 25℃,from organogenesis to hatching at 27℃).The results showed that the hatching rate,incubation duration and survival rate in each developmental stage changed significantly with temperature.At 17℃,the fertilized eggs did not develop,and all of them died.Hatching rate increased with temperature from 19 to 25℃,then decreased with as temperatures rose further from 27 to 31℃.Hatching rate was highest(76.92%±1.07%)at 25℃.At the different constant temperatures,the best survival rates in the three stages of blastodem-blastula,gastrulae-neural plate and organogenesis-hatching were obtained at 23,25 and 27℃,respectively.The hatching rate(93.69%±0.57%)with the varying temperature regime was significantly higher than those at each constant temperature,while its incubation duration and accumulated temperature were close to those at the constant 25℃.The results showed that the embryos could develop adequately with temperature of 21-29℃ and optimally at 25℃ in constant temperature regimes.The eggs of Pelteobagrus vachelli were fertilized artificially at 23℃ , from parental fish collected in the Jialing River, on May 23, 2004. The embryonic development was observed at nine experimental temperatures, i. e. eight constant temperatures （17, 19, 21, 23, 25, 27, 29 and 31℃ ） and a varying temperature （from the blastoderm to the blastula stage at 23℃ , from gastrulae to the neural plate stage at 25℃ , from organogenesis to hatching at 27℃ ）. The results showed that the hatching rate, incubation duration and survival rate in each developmental stage changed significantly with temperature. At 17℃, the fertilized eggs did not develop, and all of them died. Hatching rate increased with temperature from 19 to 25℃, then decreased with as temperatures rose further from 27 to 31℃. Hatching rate was highest （76.92% ± 1.07%） at 25℃ . At the different constant temperatures, the best survival rates in the three stages of blastodem-blastula, gastrulae-neural plate and organogenesis-hatching were obtained at 23, 25 and 27℃, respectively. The hatching rate （93.69%±0.57%） with the varying temperature regime was significantly higher than those at each constant temperature, while its incubation duration and accumulated temperature were close to those at the constant 25℃ . The results showed that the embryos could develop adequately with temperature of 21-29℃ and optimally at 25℃ in constant temperature regimes [Acta Zoologica Sinica 51 （4） ： 753-757, 2005].

关 键 词：瓦氏黄颡鱼 水温 胚眙发育 存活率 孵化率 孵化历时 胚胎发育过程 温度因子 鱼类繁殖 生物学参数 

分 类 号：Q954.4[生物学—动物学]