云斑尖塘鳢幼鱼摄食特性的初步研究

研究了云斑尖塘鳢(Oxyeleotris marmorata)幼鱼的摄食特性。结果表明:在幼鱼阶段,云斑尖塘鳢的摄食方式为主动掠食;个体全长10mm的日摄食量约为体重的11.66%,40mm的日摄食量约为体重的51.04%,69mm的日摄食量约为体重的55.30%;日摄食量与幼鱼全长呈正相关关系:A=11.3577+0.7664L(r=0.876);云斑尖塘鳢幼鱼的适口饵料鱼全长为其全长的25%～50%,幼鱼摄食15～17h后可完全消化饵料鱼;云斑尖塘鳢幼鱼昼夜摄食节律明显,一昼夜出现一个摄食高峰,高峰时段为19:00-01:00。

Feeding Characteristics of Oxyeleotris marmorata Fry

Feeding characteristics of Oxyeleotris marmorata fry were studied. The results showed that the feeding behavior of Oxyeleotris marmorata fry was active, and its daily feeding amount was 11.66 percent of body weight when the total length was 10 mm; the proportion was 51.04% when the total length was 40 mm; the proportion was 55.30% when the total length was 69mm. Along with total length of larva rises, the daily feeding amount also increases, and the relationship between them was A =11.3577+0.7664 L ( r=0.876). The fitting size of feeding fish was about from 25 percent to 50 percent of Oxyeleotris marmorata fry's total lengthy, and they could be digested in 15-17 h. The day and night feeding rhythm of Oxyeleotris marmorata fry was clear and it was identical with the night feeding. The feeding peak appeared at 19:00-01:00.