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草鱼饵料在其早期发育中变化很快。动物性饵料,如浮游动物、底栖无脊椎动物是早期生长发育阶段重要的饵料成份,其中轮虫是早期直到全长21毫米鱼苗的最重要饵料。随着草鱼的生长,浮游甲壳动物和摇蚊幼虫则成为较重要的饵料。先前的研究,报告了草鱼种在全长约50毫米时转向以大型植物为食(Sobolev,1970;Opuszynski,1972)。在我们的养鱼池中初步观察表明,全长超过50毫米的鱼种仍以动物性饵料为食,因此,我们进行了这一研究,以确定草鱼鱼种的食性。
Grass carp feed changes rapidly in its early development. Animal feed, such as zooplankton, benthic invertebrates, is an important feed ingredient in the early stages of growth and development. Rotifers are the most important bait for early fry up to 21 mm in length. With the growth of grass carp, plankton crustaceans and chironomid larvae become more important bait. Previous studies reported that grass carp species switched to large-scale plants for about 50 mm in length (Sobolev, 1970; Opuszynski, 1972). Preliminary observations in our fish ponds indicate that fish species more than 50 mm in length still feed on animal feed, so we conducted this study to determine the feeding habits of grass carp fingerlings.