摘要
黄渤海区的比目鱼类Pleuronectiformes种类颇多，据记载有20多种，特别以鲽科Pleuronectidae鱼类最多；产量甚高、曾达到2万吨左右．因此对比目鱼类的基础生物学作系统的调查研究，无论对生产上、尤其是开展增殖；还是理论上、为研究数量变动提供某些依据，都是有益的。本文即属这类调查研究的一个专题。
The materials of this paper were sampled from catches of the trawlers operated in Shidao fishing ground ( 123'-124'30'E 35'-37'N ) during the winter-spring season from January 1978 to March 1980. The materials used amount to 723 specimens under four families, fifteen species. According to the observation on the external features of digestive organs of the fishes and the results of cluster analysis and food analysis, they could be divided into three principal groups.Group Ⅰ: Carnivorous species mainly feeding on small fishes and shrimps. In this group, there are Paralichthys olivaceus (T&S), Pseudorho-mbus cinnamomevs ( T&S ) , Eopsetta grigorjewi( Herzenstein ) , Cleistheres herzensteini (Schmidt), Vcraster variegatus ( T&S )and Clidoderma asperrfmum(T&S) .Group Ⅱ:. Species feeding on polychaeta, Cphiura and other benthic organisms.In this group, there are Platichthys bicoloratus ( Basilewsky), Pseudoflcuronectes yokohamae Gunther, P. herzensteini( T&S ), Pleuronich-thyscornutus(T&S), Tanakins kitaharae (T&S) and Microstomus achne (I&S).Group Ⅲ: Species feeding on benthic organisms and detrital organic matters. In this, group, there are Zebrias zebra ( Bloch), Cynoglossus joyveri Gunther and C.abbreviatvs (Gray).According to the digestive system and the feeding habits, species of Pleuronectiformes. Paralichthys olivacevs ( T&S ), Plctichthys bicoloratvs ( Basilewsky ) , Verasper variegatvs ( T&S ) Microstomus achne ( T&S ) and Cynoglossus abbreviates ( Gray ) may be selected to be propagated in the Yellow Sea and Bohai. And the protection of propagation of the other species should be strengthened.
