海洋科学2024，Vol.48Issue(4)：53-62,10.DOI:10.11759/hykx20230915001
温度与盐度对福建牡蛎与长牡蛎、熊本牡蛎、香港巨牡蛎种间杂交子代孵化及其早期生长成活的影响
Effects of temperature and salinity on hatching,early growth,and survival of interspecific hybrid larvae between Crassostrea angulata and C.gigas,C.sikamea,and C.hongkongensis
摘要
Abstract
The Fujian oyster Crassostrea angulata is the most cultivated oyster species in the Fujian province.To evaluate the effects of different temperatures and salinities on the hatching rate,the early growth and survival rate of C.angulata(A)and their crosses with C.gigas(G),C.sikamea(S),and C.hongkongensis(H),five experimental groups of AG(A♀×G♂),GA(G♀×A♂),SA(S♀×A♂),HA(H♀×A♂),and AA(A♀×A♂)were produced us-ing diallel crosses,except for hybrid sterility that existed in A♀×S♂and A♀×H♂combinations.The hatching rates of AG,GA,SA,HA,and AA reached maximum values of 78.33%,75.00%,63.33%,55.00%,and 71.67%,respec-tively,when the salinity was 25.When the temperature was<25℃,the hatching rate of GA was higher than that of other groups;when the temperature was>25℃,the hatching rate of AG was the highest,and the maximum hatch-ing rate reached 83.33%at 25℃.After 7 days of culture under different salinity conditions,the shell height of HA reached a maximum of 97.8 µm at a salinity of 20,with a survival rate of 46.67%,and all larvae died on the 5th day at a salinity of 35.The maximum shell height of AG,GA,SA,and AA was 124.7,121.2,93.7,and 111.8 µm,re-spectively,when salinity was 25.After culturing for 7 days at different temperatures,all groups showed the maxi-mum shell height and survival rate at 25℃,and the survival rate of each group showed a trend of first increasing and then decreasing with increased temperature;the survival rate of AG was highest in all groups(88.89%)at 25℃.After 16 days of continuous cultivation under suitable temperature and salinity conditions,the shell heights of the different groups were as follows:AG>GA>AA>HA>SA.Shell height,shell height SGR,and survival rate of AG were always higher than those of other groups,while those of SA and HA were always lower than those of the self-crossing group AA.Our study showed that the hybrid offspring of C.angulata and C.gigas showed obvious growth and survival advantages;AG was better than GA,and the growth and survival rates of AG were highest un-der the conditions of salinity of 25 and temperature of 25℃.These results provide a reference for the breeding of Fujian oysters.关键词
福建牡蛎/长牡蛎/熊本牡蛎/香港巨牡蛎/种间杂交Key words
Crassostrea angulata/C.gigas/C.sikamea/C.hongkongensis/interspecific hybridization分类
农业科技引用本文复制引用
涂康,韩自强,肖懿哲,谢双如,黄琼叶..温度与盐度对福建牡蛎与长牡蛎、熊本牡蛎、香港巨牡蛎种间杂交子代孵化及其早期生长成活的影响[J].海洋科学,2024,48(4):53-62,10.基金项目
福建省科技计划(2021N0041) （2021N0041）
农业农村部东海海水健康养殖重点实验室开放课题(2022ESHML19)Fujian Science and Technology Plan Guiding Project,No.2021N0041 （2022ESHML19）
Key Laboratory of Healthy Mariculture for the East China Sea,Ministry of Agriculture and Rural Affairs,P.R.China,No.2022ESHML19 （）
