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本文用~(35)S-甲硫氨酸作标志,测定了脊尾白虾〔Palaemon(Exopalaem-on)carinicauda Holthuis〕幼体对饵料的摄食与吸收的特点,所得结果表明: 在溞—Ⅱ后期至溞—Ⅲ期从滤食性转变为捕食性。用标志的咸水丰年虫和双齿许水溞的无节幼体及轮虫为动物性饵料,测得脊尾白虾幼体的捕食率随着饵料密度的增大而增大,在某一密度下达到最大值。吸收率变化的情况与此相似。脊尾白虾幼体对饵料的利用率在一定界限密度之上随着饵料密度的增大而降低,并在某一密度下稳定于较低的水平上。捕食和吸收能力随着脊尾白虾幼体的发育而增强。当饵料密度高于最适密度时,产生过剩摄食。
In this paper, the characteristics of food intake and absorption of Palaemon (Exopalam-on) carinicauda Holthuis larvae fed on diet were determined by using (35) S-methionine. The results showed that:溞 -Ⅲ period from filter-feeding into predatory. The results showed that the predation rate of juvenile Pleurotus ostreatus increased with the increase of feed density and reached the maximum at a certain density with the sign of Artemia salina and bivalve nauplii and rotifers as animal feed, value. Absorption rate changes are similar. The utilization of bait for juvenile white shrimp decreased above a certain densitometric density with increasing feed densities and remained stable at a lower density at some densities. Predation and absorption capacity increased with the development of juvenile white-footed shrimp. When feeding density is higher than the optimal density, resulting in excess feeding.