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云斑尖塘鳢人工育苗技术初步研究 总被引：1，自引：0，他引：1
对云斑尖塘鳢（Oxyeleotris marmoratus （Bleeker））人工育苗技术进行了初步的研究,利用燃油热水炉加温进行亲鱼越冬,采取人工辅助控温、保温的方法,配合其生态条件的调控和投喂优质饲料,培育亲鱼成熟并能自然产卵,使用人工饵料、代用饵料、生物饵料等混合饵料互相搭配组合,经过2个月左右的培育鱼苗全长达3cm左右。亲鱼具多次产卵习性,观察到一年当中最多产卵4次。利用外源激素催产率达到95．0％,自然产卵的受精率和孵化率均高于人工催产。 相似文献
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本文报道了以人工越冬的长毛对虾Penaeus penicillatus为材料,以切除亲虾单侧眼柄的方法配合适当的生态条件,给予优质的饵料和精心饲养管理,促进亲虾提前成熟产卵,并培育出虾苗。亲虾越冬的存活率为52.91％。手术后亲虾存活率和促熟率分别为65.74％和59.12％。手术后10天即有一尾亲虾促熟产卵,大批成熟产卵是在手术后第25天。产卵后的亲虾经过4—7天的培育又能恢复成熟多次产卵,最多的产4次。从亲虾初次所产的卵径大小、受精率、孵化率及幼体成活率都与海区亲虾相接近,唯有产卵量比海区亲虾少,这是因为人工养殖的越冬亲虾个体小,同时在人工饲养条件下远远不如自然海区的生态条件和营养条件等缘故。越冬期间的水温为13.8—16.5℃,海水比重1.020以上。促进卵巢成熟期间的水温为20.3—27.2℃,海水比重为1.017—1.021。投喂新鲜的贝类、小杂鱼虾,投喂量以第二天略有剩余为度。 相似文献
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Although much progress has been made in the last few years on the hatchery rearing of penaeid shrimps, the use of artificial feeds and the innovation of culture techniques, the key problem in the shrimp culture industry is still to increase yield per unit culture area for greater economic returns. In finding an answer to this problem, experiments on the cultivation of two (instead of one) species with different biological requirements were carried out in different seasons, Penaeus orientalis Kishinouye in spring and P. penicillatus Alcock in summer in Fujian as it has a longer culture season. Years of study and practical experience in large-scale rearing of shrimps show that successive 2-crop culture of penaeid shrimps is feasible and more economical as no additional investment in terms of maintenance facilities and management is needed. The pond is fully used the whole year. The renovation of techniques and the timing of the culture of the two species led to the development of a 2-crop culture method w 相似文献
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