黄海北部近岸鱼类资源数量分布与群体结构

Abundance Index, Distribution and Stock Struture of the Fishery Resources along the Coast of Northern Yellow Sea

通过 1998 年 6 月和 9 月共 24 个站位的底拖网调查,分析了黄海北部近岸渔获物的组成,其结果表明,该海域鱼类资源量指数较低,为 17.068 kg / 网·h,鱼类资源经济品质结构低值化,鱼类资源群体结构小型化、低龄化更加突出,一些个体小、价值不高的种类如青鳞鱼、鳀鱼、斑鰶等占据了春季渔获量的主要部分,秋季捕获的经济鱼类如兰点马鲛、鲐鱼等全部是当年生幼鱼。

Based on the data collected from the bottom trawl survey using fishing vessels which have 24 survey stations along the coast of Northern Yellow Sea in June and Sep. 1998, the composition of catches is analyzed. The results show that the fish abundance index of 17.068 kg/haul·h is lower. The main species' value, length, weight and main age group have declined seriously. Small sized, low valued fish such as Scaled sardine ( Sardinella zunasi ), Japanese anchovy ( Engrauliss japonicus ), Gizzard-shad ( Clupanodon puntcatus ) captured in spring have become the main components in the fishery resources. Spanish mackerel ( Scomberomorus niphonius ) and Chub mackerel ( Pneumatophorus japonicus ) captured in Autumn are all the half grown young of the year ( 0 age ).