论文部分内容阅读
滇池金线鲃(Sinocyclocheilus grahami)是滇池湖泊生态系统的指示物种和特有种。因水质污染和外来物种入侵等因素的影响,该鱼类自1986年起就从湖体中消失,仅有湖周围的少数龙潭中尚保存有少量滇池金线鲃。至2007年3月初,有两次繁殖试验取得了成功。先后试验了5尾雌鱼和6尾雄鱼,获得鱼卵约1600粒,并实施干法受精。约有1320粒受精,平均受精率为73%。孵化出鱼苗约480尾,平均孵化率为36%。经10天饲养,约有95%以上的鱼苗存活,体长达8-12mm。滇池金线鲃人工繁殖成功的意义有三点:能有效保护该物种免于灭绝;繁殖的鱼苗放归湖泊合适水域,将有助于恢复滇池的土著生物多样性;有助于推动当地水产养殖业从非土著鱼类养殖向土著鱼类养殖的方向转变。
Sinocyclocheilus grahami is an indicator species and endemic species of lake ecosystem in Dianchi Lake. The fish have disappeared from the lake body since 1986 due to water pollution and the invasion of alien species. Only a small number of Dianchi Lake gold cages are still preserved in the small number of Longtan around the lake. As of early March 2007, two breeding trials have been successful. A total of 5 females and 6 males were tested to obtain about 1,600 eggs and eggs, and dry-fertilization was carried out. About 1320 fertilization, the average fertilization rate of 73%. Hatching about 480 fry, the average hatching rate was 36%. After 10 days feeding, about 95% of the fry survive, the body up to 8-12mm. The success of Artificial Reproduction in Dianchi Goldfly (Gyps fulvus) is threefold: it can effectively protect the species from extinction; the breeding of the fry in the appropriate waters of the lake will help to restore the indigenous biodiversity in Dianchi Lake and help to promote the local aquaculture industry Indigenous fish culture changes from non-indigenous fish culture.