闽南—台湾浅滩海域鱼类资源生产量

CAPACITY OF FISH RESOURCES IN SOUTHERN FUJIAN-TAIWAN SHOAL SEA AREA

以海洋生态系统营养动力学为理论依据,根据调查所获得的有关闽南—台湾浅滩海域的初级生产力资料,检测了该海域的浮游植物有机碳含量,测算了生态效率,检测了 52 种主要经济鱼类营养级及其有机碳含量。采用营养动态模型和 Cushing模型估算了该海域生态系统中鱼类资源的生产量(自然生产量),同时采用 Cadima模式和 MSY简单模式估算鱼类资源最大可持续开发量。估算结果如下:鱼类资源生产量为98.63×104t,最大可持续开发量为48.35×104t。1997年以来实际年渔获量为 48.64×104 t —53.83×104 t,超过了鱼类资源的最大可持续开发量,呈现过度捕捞态势。还讨论了加强该渔场渔业资源管理的7项重要措施,以促进鱼类资源的较快恢复。

Based on the trophic dynamics of marine ecosystem and the investigation data of primary productivity in the Southern Fujian-Taiwan Shoal fishing ground, the organic carbon concentrations of phytoplankton and 52 species of main economic fishes were determined, and the nutritive levels of the fishes and the ecological efficiency of the phytoplankton in the fishing ground were calculated. The ecological capacity of fish resources was calculated to be 98.63×10^(4) ton by Cushing model and nutrition dynamic model, and the MSY (most sustainable yield) was estimated to be 48.35×10^(4) ton by MSY and Cadima models. From 1997 to 2002, the actual yield was 486.4×10^(3)—538.3×10^(3) ton, exceeding the MSY of the fishery resources and showing an overfishing tendency.