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长江野生中华绒螯蟹育苗性能的初步研究
万全,苏时萍,马浩强,古界明,陆卫兵
0
(安徽农业大学动物科技学院;安徽省界明螃蟹养殖有限公司;江苏如东东牌生态蟹苗繁育基地)
摘要:
2011年11月,从安徽省无为县选择野生长江中华绒螯蟹亲本1 388只,到江苏省如东县进行天然海水生态育苗,其中雄蟹350只,总重80.05 kg;雌蟹1 038只,总重194.05 kg。在面积为2.5亩的池塘中,进行对比育苗试验,繁育盐度保持在19‰~26‰,pH变化范围在8.28~8.90,比较野生长江中华绒螯蟹与普通蟹之间繁育性状的差异。结果表明,野生亲本的体重和卵重均高于普通亲本,差异极显著;野生亲本与普通亲本的成熟系数和相对繁殖力差异不显著;野生蟹产卵率(52.85%)高于普通蟹产卵率(30.91%);野生蟹亲本组幼体发育较普通幼体发育为快,幼体个体较大,共产大眼幼体苗6.5 kg,大眼幼体规格137 848个?kg-1,平均125.3只?g-1;普通亲本组大眼幼体共产23 kg,规格为156 468个?kg-1,平均156.5只?g-1。
关键词:  中华绒鳌蟹  野生长江亲本  普通亲本  育苗性状对比
DOI:
基金项目:安徽省虾蟹产业体系项目
Preliminary study on the breeding performance for wild Yangtze River brood stocks of Chinese mitten crab
WAN Quan,SU Shi-ping,MA Hao-qiang,GU Jie-ming,LU Wei-bing
(School of Animal Science and Technology, Anhui Agricultural University;Jieming Crab Cultivation Co.Ltd;Dongpai Ecological Crab Breeding Farm)
Abstract:
In November, 2011, 1 388 wild Yangtze River wild brood stocks of Chinese mitten crabs were chosen from Wuwei county, Anhui province for ecological breeding in natural sea water in Rudong county, Jiangsu province, of which 350 were male with a total weight of 80.05 kg, and 1 038 were female with a total weight of 194.05 kg. Comparing breeding experiment was conducted in two ponds of 2.5 mu in size, with the water condition of 19‰-26‰ for salinity, and 8.28-8.90 for pH. The breeding characteristic differences between the wild and common brood stocks were studied. The results indicated that the weights of body and ovary for the wild brood stock were higher than those of the common one, and the difference was extremely significant. The differences for the mature index and relative fecundity between the wild and common brood stocks were not significant. The spawning rate of the wild brood stock (52.85%) was higher than that of the common brood stock (30.91%). The development speed was faster and the size was bigger for the wild larvae than that of the common larvae. The total volume of the wild megalopa was 6.5 kg with a size of 125.3 tails per gram, and 23 kg for the common brood stock with a size of 156.5 tails per gram.
Key words:  Chinese mitten crab  wild Yangtze River brood stock  common brood stock  comparison of breeding characteristics

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