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研究了拟穴青蟹(Scylla paramam osain)大眼幼体在不同饵料密度和组合条件下对卤虫(Ar-tem iasp.)无节幼体及成体的摄食率、摄食节律等,发现:光照-视觉因素对拟穴青蟹大眼幼体捕食卤虫无节幼体的数量无显著影响,但对捕食卤虫成体的影响显著(p<0.05).饵料密度较低(如卤虫无节幼体密度<10 ind/cm3)时,饵料密度与拟穴青蟹大眼幼体摄食率呈正相关;饵料密度较高时饵料密度变化对拟穴青蟹大眼幼体摄食率的影响不显著(p>0.05).禁食后投饵,在高饵料密度(如卤虫无节幼体密度≥10 ind/cm3)下拟穴青蟹大眼幼体的摄食率在短时间(如4 h)较高,随供饵时间的延续摄食率开始下降,较长时间(24 h)摄食率显著较低.以干重计,拟穴青蟹大眼幼体对卤虫成体的摄食率全面高于对卤虫无节幼体;但混合投喂卤虫无节幼体和成体时拟穴青蟹大眼幼体摄食的卤虫成体数量较少,表明在卤虫无节幼体和成体同时存在的情况下拟穴青蟹大眼幼体倾向于放弃卤虫成体捕食无节幼体.拟穴青蟹大眼幼体的摄食行为受到被捕食风险和饵料斑块分布的显著影响.育苗生产中对拟穴青蟹大眼幼体投喂卤虫无节幼体的密度无需高于10 ind/cm3.
The feeding rates and feeding rhythms of Artemia nauplii (Nauplius nauplii) nauplii and adult under different feeding densities and combinations of Scylla paramam osain were studied. The results showed that light - visual There was no significant effect on the numbers of Artemia nauplii feeding on Artemia crassipes (P <0.05), but the density of Artemia nauplii nauplius <10 ind / cm3), there was a positive correlation between the feed intake and the feeding rate of Larvae Larvae (P <0.05). The higher feeding density had no significant effect on feed intake of Larvae Larvae (p> 0.05). After feeding, the feed intake of P. crassa larvae at high feed density (eg Artemia nauplii density ≥10 ind / cm3) was higher in a short time (eg 4 h) The feed intake rate began to decrease after a long period of time (24 h), and its feeding rate to Artemia salina was higher than that to Artemia nauplii on a dry weight basis. However, Feeding Artemia nauplii and adult cradle crab crab Eupolyphaga nauplii fed on a small number of adults, indicating Artemia nauplii In the presence of both adults and adult, the green-eyed larvae of P. crassipes tended to abandon Artemia nauplii and feed their nauplii, and the feeding behavior of P. crassa was significantly affected by the predation risk and the distribution of bait patches. The density of Artemia nauplii nauplii fed on the Euphausia fortunei did not need to be higher than 10 ind / cm3.