海城市西四渔场高产塘生态学分析

An Ecological Analysis of High Yield Fish Ponds in Xishi Fish Farm in Liaoning Province

根据１９８４～１９８５年对海城西四渔场养鱼他的生态学调查材料，论述了鱼池生态系统的非生物环境、生物群落、初级生产力以及能量转化效率。鱼池的产量为２．２４～５．７０ｇ·ｍ￣（－２）·ｄ￣（－１），其中鲢鳙鱼产量为１．４４～３．７９ｇ·ｍ￣（－２）·ｄ￣（－１）。初级生产量（产氧量）为６．１８～１７．１８ｇ·ｍ￣（－２）·ｄ￣（－１），转化为鲢鳙产量的能量生态效率平均为１０．８３％。文中比较了海城和镇赉的４个高产塘，从而探讨增产的途径。

Based on the data of ecological surveys in 1984 and 1985,the abiotic environment,community of species, primary productivity and energy conversion efficiency in the ecosystem of fish-raising ponds were described. The net fish yield in the ponds was 2.24～5.70g·m￣(-2)·d￣(-1),including 1.44～3.79g·m￣(-2)·d￣(-) for silver carp(Hypophthalmichthys molitrix ) and bighead carp(Aristichthys no-bilis).There was a primary production of 6.18～17.18 g·m￣(-2)·d￣(-1) in the fish ponds,in which 10.83%of the primary poduction,on an average, could be con-verted into the yields of silver carp and bighead carp.The comparison of the ener-gy conversion efficiency in the fish farm in Xishi with that in Zhenlai fish farm has been made to search for an increase in fish yields.