摘要
花鲈为沿海及河口的经济鱼类，亦可溯河生活于淡水。在长江口水域，花鲈属中型鱼类，其体长和体重的相关关系式为：Ｗ＝０．０６０５Ｌ２．６３４６（ｒ＝０．９８７８），生长方程为：Ｌｔ＝１００．９９５７［１－ｅ－０．１７６８（ｔ＋０．７６３３）］，Ｗｔ＝１１５４２．２６［１－ｅ－０．１７６８（ｔ＋０．７６３３）］２．６３４６，体重生长拐点ｔｒ＝４．７龄，拐点处体重为３２８１．４克。早期幼鱼以浮游动物为食，以后转变为主要以虾其次以鱼为食，成鱼则主要以鱼其次以虾为食。在长江口水域，鱼虾等饵料资源丰富，为花鲈极好的肥育场所。在该水域，花鲈的资源量应引起重视。文中，最后对其资源的保护和发展作了探讨。
In this paper a research was made on the age, growth and feeding habits of Japanese sea-bass,Lateolabrax japonicus (Cuvier et Valencinnes).Samples were collected monthly from the estuary of Yangtze River in 1986 and 1987. The scales were applied to determine the age of fish.The relationship between its body weight,W (kg) and body length, L (cm) can be expressed by the formula: W=0. 0605L2.6346 (r = 0. 9878). The relationship between its age,T and length, L can be expressed by the equation: Lt=100. 9957[1-e-0.1768(t+0.7633)]. The age, T and weight, W relationship can be denoted by the equation: Wt=11542. 26 [1-e-0.1768(t+0.7633)]2.6346. The growth inflection point is at tr = 4.7,corresponding to W=3281.4gm.This fish is a prodatory one and its feeding habits vary with age.At early young stage it feeds on zooplankton. As the time went on, its foods have relevantly changed and then the foods graduate into shrimps, fish and isopods. The adult feeds on fish and shrimps. Small fish and shrimps are abundant in estuary of Yangtze River and most foods of Japanese sea-bass are smaller fish and shrimps. This may be the reason as it grows up faster than that of other waters. Therefore protaction and propagation of the fishery resources of Japanese sea-bass in estary of Yangtze River are important.
出处
《水产学报》
CAS
CSCD
北大核心
1994年第3期183-189,共7页
Journal of Fisheries of China
基金
国家自然科学基金
关键词
花鲈
生长
食性
长江口
鲈鱼
Lateolabrax japonicus,growth,feeding,estuary of Yangtze River
