| 摘要: |
| 作者1982年在广东汕尾室内水泥池开始进行栉江珧 (Pinna Pectinata)人工育苗研究,1984年成功地育出稚贝。本文介绍了作者在研究中采用阴干和升温刺激等方法,可使亲贝自行排放精、卵,并进一步受 精、孵化成幼虫,幼虫经多次变态发育,结束浮游期而进入底栖附着期。附着后的稚贝,新壳生长迅速,只要条件适宜,很快便能倒立插起。在一定条件下将稚贝移 至海区浮台吊养,生长快,两个半月即成小贝,最大个体为68×30×8.9mm,重6.2g。本文还对栉江珧人工育苗不同于其它双壳类的有关问题进行了 |
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| A PRELIMINARY STUDY ON THE ARTIFICIAL REARING OF LARVAL PEN SHELL PINNA PECTINATA LINNE |
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| Abstract: |
| The research on artificial rearing of larval pen shell Pinna Pectinata was conducted in Shanwei, Guangdong province in 1982. The young spats by artificial rearing were obtained successfully in 1984. The methods and results are present in this paper. (1) The broodstocks of female and male received the stimulations of temperature increasing and indoor drying before stocking in rearing tank, and were allowed to move freely with the water current. Natural spawning, fertilization in the tank, the numerous amount of larva with culture potential are obtained. (2) The rearing tank have a capacity of 30-200 cubic meters. Water is changed by alternative recirculating and convecting. Throughout the experiment, water temperature was kept at 26.8-29.6℃; salinity 25.74-31.07%; and pH 8.1-8.4. (3) Metamorphosis attachment stage was formed from straight hinge larva after rearing for 20-21 days, the individual body dimension reached 520-570μm×490-540μm (shell length × shell height) which are the largest ones among the floating larva of bivalve found so far. (4) The larva 48 hours after hatching-until straight hinge stage, frequently floated on the water surface. It was found that behavior of larva pen shell Pinna Pectinata is much different from other bivalves. (5) The metamorphosis larvae which are ending floating stage and entering benthic behavior do not present the eyespot. The metamorphosis attachment larvae were characterized by atrophy of velum, occurrence of the foot, and active behavior. (6) The new shell of young spats grow rapidly with the dimension 900μm×600μm (length×height) after 24 hours. Young spats can very fast upside-down and inserted on the substract. (7) The young spats were cultured in the sea areas, which were placed in the net bags with rough sand and handed on the floating platform. They grow rapidly with high survival rate, and the dimension of largest one reach 68mm×30mm×8.9 mm (length× height x width), and 6.2g of individual body weight after temporary culture for two and half months. The effective results were obtained. |
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