渤海鲈鱼食物组成与摄食习性的研究

对渤海３５３尾鲈鱼的胃含物样品进行了分析，得出如下结论：（１）鲈鱼为游泳动物食性的鱼类，游泳动物占其胃含物总重量的６３．５８％；（２）主要摄食鱼类，甲壳类，其饵料种类主要包括口虾蛄，Ｔｉ鱼，凤鲚，黄鲫等；（３）食物组成与摄食习性呈现明显的月变化；（４）幼鲈主要摄食小型鱼类，甲壳类及其幼体，在相应月份里，与成鲈的食物组成相似程度很小。

FOOD COMPOSITION AND FEEDING HABITS OF JAPANESE SEA BASS IN THE BOHAI SEA

The analysis on 353 stomach contents of Japanese sea ball (Lateolabrax japonicas ) in the Bohai Sea has been made and the conclusions were obtained below: 1. Japanese sea bass mainly pray on nekton (weight percentage: 63. 58% ) and benthos (weight percentage: 33. 22%). 2. Its stomach contents comprised five food groups (Gastropoda, Inmellibranchia, Cephalopoda, Copepoda and fishes). Among 56 food species, Oratosquilla oratoria, Engraulis japonicus, Coilia mystus and Setipinna taty are important food items. 3. The food compositions demonstrated monthly variations, Chiefly in the amount of food items and important food species. The ranges of monthly replacement of food compeition are between 36. 99- 100 %. 4. The feeding nit6nsities have two peak periods (Apr. -June and Nov. -Dec. ) when the fullness indices are more than 100%. 5. Juvenile japanese sea bud have Clupeid fishes, copepoda and Polychaeta as their dominant food groups.