台湾海峡灯光围网渔业发展前景研究(英文)

A study on the development future of light-seine fishery in the Taiwan Strait

为了探讨台湾海峡灯光围网渔业的发展前景，本文收集了１９８６ ～１９９６ 年福建在该海峡生产的灯光围网渔船的生产资料及有关海洋环境因子资料，采用数理统计方法、计量分析法，并从生态学观点进行分析。结果表明，由于台湾海峡存在多处上升流区，浮游生物丰富，水文条件较稳定，有利于中上层鱼类集群索饵；灯光围网作业对海底环境影响小，对经济鱼类幼鱼损害较轻。由于中上层鱼类资源恢复较快，因此，台湾海峡的中上层鱼类资源较为丰富。据评估，该海峡的资源量有６４ 万ｔ，可捕量有３３ 万ｔ，有一定开发潜力，发展灯光围网前景看好。但从经济效益看，因１９９６ 年单位捕捞努力量下的捕捞量（ＣＰＵＥ，ｔ／ｋ Ｗ） 在ＣＰＵＥ与Ｆ 相关曲线最高点之下，因此捕捞努力量不宜盲目增加。

In order to approach the developing future of light-seine, the marine fishing data of Fujian Province fishing in the Taiwan Strait (50 sample light-seiners)from 1986 to 1996 and some marine environmental factors in the upwelling areas were collected and analyzed with mathematical and statistical method, Schaefer and Fox models, the least squares method and from the viewpoint of ecology. The results show that there are many upwelling regions in the Taiwan Strait, where large quantities of plankton and stable hydrological conditions are favorable for fish to concentrate and feed. The fishing practice of light-seine has relatively smaller effects on the marine geologic environment and young fishes. The growth cycle of pelagic fish is shorter and the generation recruitment is quicker. It is evaluated that the pelagic fish stocks are 640 000 t with catchable yields of 330 000 t , therefore, the stocks are abundant and have some exploited potentialities. The light-seine fishery in the Taiwan Strait has a bright future.However,since the CPUE(catch per unit of effort) of light-seine in 1996 was below the highest point of the regression curve of growing tendency, the fishing effort should not be blindly increased from the viewpoint of economic benifits.