大弹涂鱼仔鱼的摄食、生长和成活的研究

本文主要论述大弹涂鱼仔鱼阶段有关摄食和生长发育，以及不同饵料对仔鱼生长和成活的影响。结果表明，孵化后3—5日龄即仔鱼危险期，正处于内源性(包括混合性)营养转入外源性营养。颗粒有机碎屑是仔鱼的开口饵料，培育期间以底栖硅藻分解后形成的颗粒有机碎屑为饵料，其后期仔鱼成活率高达42．04％。6日龄起逐渐加投桡足类幼体和成体，其16日龄后期仔鱼平均全长可达6．15mm，平均体重1．24mg．

ON THE FEEDING,GROWTH AND SURVIVAL OF LARVAL MUDSKIPPER(BOLEOPHTHALMUS PECTINIROSTRIS)

This paper deals with rearing larval stage of mudskipper (Boleo-phthalmus pectinirostris) in reference to the feeding, development and the effectof different feeds on growth and survival of larvae. The brood fish were injectedwith HCG during the spawning season, the fertilized eggs were obtained by meansof semi-dry method. At one day after hatching, the larvae were reared in the outdoorcement pools, fed with different types of feeds and provided with sufficientaeration. The experiments inducated that there did exist a critical period of highmortality which occurred during 3-5 days after hatching. The deepest, sharpest andfastest physiological and ecological changes during the development of larvae occurredat the time of shift from endogenous (including mixed) nutrition to exogenous oneParticulate organic detritus of benthic diatoms decomposed by natural way may bethe initial diet of larvae. High survival rate of postlarvae(42.04%) was obtained andobserved at the end of rearing experiment. In addition to particulate organic detritus,copepods (nauplii, copepodites and adults) were gradually fed from six days afterhatching, and then the postlarvae grew well, with avervage total length of 6.15mm and average body weight of 1.24 mg at 16 days after hatching