异育银鲫系方正银鲫(?)与兴国红鲤(?)杂交的子代。杂种优势强,其生长速度比母体快34,7％,比本地鲫鱼快2倍左右,属杂食性鱼类,具有适应性强、育种容易、养殖周期短等优点。我县在市水产技术推广站的支持帮助下,81年从中科院水生所引进异育银鲫1500尾,放在上海师院分院实验农场饲养,主养异育银鲫,带养花白鲢、鳊鱼。银鲫亩产388斤. (一)试养概况 1.主养异育银鲫鱼种:面积 1.3亩,水深1.5 米。2月7日放养1500尾,每尾半两,共75斤。平均亩放1160尾,后放仔口编鱼106尾,白鲢658尾,草鱼71尾,花鲢60尾,共放鱼苗2395尾,平均亩放1834尾,7月份每尾巴长至1.2两,8月份长至1.9两。于11月19日起捕,总产量1886斤,平均亩产1450斤,其中银鲫505斤,平均尾重3.5两。 2.主养异有银鲫夏花:去年6月5日从松江县 Allogynogenetic crucian carp is a cross between Founder silver crucian carp (?) And Xingguo red carp (?). Heterosis is strong and its growth rate is 34.7% faster than that of its parent, about 2 times faster than that of native crucian carp. It is a omnivorous fish with the advantages of strong adaptability, easy breeding and short breeding cycle. I County in the city of Fisheries Technology Promotion Station support and assistance, 81 years from the Chinese Academy of Sciences Institute of Aquatic introduction of heterotrophic crucian carp 1500, on the Shanghai Normal University Branch laboratory farm feeding, the main culture of silver carp crucian carp, with flowers of silver carp, 鳊fish. Silver crucian carp per mu 388 kg (a) Trial Overview 1. Main breeding silver carp albino species: an area of ​​1.3 acres, 1.5 meters deep. February 7 stocking 1,500 tail, each tail half two, a total of 75 pounds. The average mus put 1160 at the end of Zi Tsai mouth made of fish 106, silver carp 658, grass carp 71, silver carp 60, a total of 2395 fish and shrimp were released, the average mu put 1834, July tail length of 1.2 per two, August grew to 1.9 two. On November 19, a total catch of 1,886 catties was obtained, with an average yield of 1,450 catties per catty, of which 505 catties were silver crucian carp with an average tail weight of 3.5 taels. 2. The main exotic silver crucian carp summer flowers: June 5 last year from Songjiang County