渤海经济无脊椎动物生态特点的研究

ECOLOGY OF THE ECONOMIC INVERTEBRATES IN THE BOHAI SEA

通过渤海经济无脊椎动物的种类组成、生态特点、数量季节变动、洄游与分布的分析研究,发现该海区的无脊椎动物主要是常见的亚热带暖水性种类。按其生态习性,可分为3种类型:1.常年定居于渤海的种类;2.夏季移向深水区的种类;3.行长距离洄游的种类。无脊椎动物的网获量随季节变化波动较大,冬季1月份网获量最低,夏秋季8、9月份为全年网获量的高峰期。

The invertebrate in the Bohai Sea is mainly warm water species of the Subtropical zone. The seasonal moving distance of most invertebrates perched in the Bohai Sea is small. Only during the period of low temperature, a few species migrate distantly for wintering. The seasonal variation of the catch of the invertebrate in the Bohai Sea is great. During the low temperature period in january, the average catch in number is 190 tails. In august and September, the average catch in number is 3,440 tails and 3,377 tails because of the complement of new colony born in this year. Five species of shirmp and cephalopod have the habit of seasonal migration. They are the important fishery resources in the Bohai Sea.