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海洋科学 2012

牙鲆与夏鲆杂交及回交子代胚胎发育及早期生长比较

, PP. 54-58

隋娟,徐世宏,王文琪,马道远,肖志忠,肖永双,刘清华,李军

Keywords: 牙鲆(Paralichthys,olivaceus),夏鲆(Paralichthys,dentatus),杂交,回交,早期发育

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Abstract:

通过人工授精技术对牙鲆(Paralichthysolivaceus)和夏鲆(Paralichthysdentatus)进行了正反交及回交实验,并比较了正反交、回交子代的胚胎发育时序和仔稚幼鱼的生长。结果表明:孵化水温18.0±0.5℃下,初孵仔鱼破膜用时为:牙鲆41h,正交鲆47h,回交牙鲆42h30min,回交夏鲆44h;16.5±0.5℃下,夏鲆61h40min,反交鲆66h。正交及两组回交子代在胚胎期均可正常发育。反交子代卵裂期出现异常,仅少数胚胎可以孵化。胚胎孵化后,在1～64日的培养过程中,反交鲆于3～4d内全部死亡,回交牙鲆发育至18日龄时全部死亡。正交鲆和回交夏鲆可正常发育,与牙鲆没有明显差别。

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