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大银狮鲈(SlizosteclionVitreumVitreumMitch),原产于北美东部,目前几乎遍及北美洲的各地。该鱼在美国、加拿大被列为冷水性鱼类,生存水温在0—30℃,幼鱼以浮游动物为食,成鱼主要摄食小型鱼类,也摄食水栖昆虫和虾类。几年来我水产研究分院从加拿大引进发眼鱼卵,每年5月中、下旬在室内孵化出鱼苗后,再放到室外池塘进行培育。但在北方哈尔滨地区,5月中、下旬室外气温较低且不稳定,鱼苗适口的轮虫、枝角类及桡足类的无节幼体在室外池塘中不易培育,又因为鱼苗生长的前期体质弱、觅食能力差,易受到室外池塘水体中敌害的侵袭,因而使鱼苗的成活率不稳定。针对这些问题,2005年5月27日大眼狮鲈鱼苗孵出后,在室内培育了17天,鱼苗个体增大适应环境能力增强,同时室外水温也提高了,有了丰富的浮游动物饵料时鱼苗再放入室外池塘进行养殖。
Large silver pike (SlizosteclionVitreumVitreumMitch), native to North America, east, now almost throughout North America. The fish in the United States, Canada, was classified as cold water fish, living water temperature at 0-30 ℃, juvenile feeding on zooplankton, adult fish feeding small fish, but also feeding water insects and shrimp. Over the past few years my aquatic research branch from the introduction of eye-catching eggs in Canada, in mid-May each year in late hatchlings fry indoors, and then placed in outdoor ponds for cultivation. However, in the northern part of Harbin, the nocturnal outdoor temperatures are low and unstable in mid-May. The nauplii, cladocerans and copepods of nauplii are not easy to cultivate in outdoor ponds due to fry, Weak, foraging ability is poor, vulnerable to outdoor pond water enemy attack, so that the survival rate of fry instability. In response to these problems, on May 27, 2005, the Great-billed Sea bass was hatched and incubated indoors for 17 days. Individual fry were more able to adapt to the environment and the outdoor water temperature was also raised. With abundant zooplankton feed Fish fry and then into outdoor ponds for breeding.