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当前位置: 首页 > 文章 > 尼罗罗非鱼行为习性及其捕捞渔具的设计 水产学报 2003,27 (5) 499-503
Position: Home > Articles > The behavior of Oreochromis nilotica and the experimental study on the design of the fishing gear Journal of Fisheries of China 2003,27 (5) 499-503

尼罗罗非鱼行为习性及其捕捞渔具的设计

作  者：
朱清澄;唐议
单  位：
上海水产大学海洋学院
关键词：
尼罗罗非鱼;行为习性;捕捞渔具
摘  要：
When the temperature runs up to 20℃,the male Oreochromis nilotica will excavate holes on the sides or the bottom of the pool. Oreochromis nilotica will hide in the holes when scared by the fishing haul or other provocation. This would make the fishing operation very difficult, and the fishing rate very low. With the ordinary seine net,the fishing rate of first haul is always under 30%, and the total fishing rate for the first three hauls is about 50%. On the basis of the study on the behavior of Oreochromis nilotica, a new fishing gear, a seine with a curtain net, is designed. On the newly designed seine, there is a curtain net between the sink line and the bolch line. The bolch line is much longer than the foot line, and will be loose enough in fishing operation to get into the hole to scare out the fish which is hidden in the hole. The newly designed seine was tested in four Oreochromis nilotica pools in Yantai and two Oreochromis nilotica pools in Taian respectively. The results show that the fishing rate is over 60% for the first haul, and the total fishing rate for the first three hauls is above 90%. The newly designed seine is more suitable for the fishing operation in the pool with harder bottom.
译  名：
The behavior of Oreochromis nilotica and the experimental study on the design of the fishing gear
作  者：
ZHU Qing-cheng,TANG Yi (Ocean College, Shanghai Fisheries University, Shanghai200090, China )
关键词：
Oreochromis nilotica;behavior;fishing gear
摘  要：
When the temperature runs up to 20℃,the male Oreochromis nilotica will excavate holes on the sides or the bottom of the pool. Oreochromis nilotica will hide in the holes when scared by the fishing haul or other provocation. This would make the fishing operation very difficult, and the fishing rate very low. With the ordinary seine net,the fishing rate of first haul is always under 30%, and the total fishing rate for the first three hauls is about 50%. On the basis of the study on the behavior of Oreochromis nilotica, a new fishing gear, a seine with a curtain net, is designed. On the newly designed seine, there is a curtain net between the sink line and the bolch line. The bolch line is much longer than the foot line, and will be loose enough in fishing operation to get into the hole to scare out the fish which is hidden in the hole. The newly designed seine was tested in four Oreochromis nilotica pools in Yantai and two Oreochromis nilotica pools in Taian respectively. The results show that the fishing rate is over 60% for the first haul, and the total fishing rate for the first three hauls is above 90%. The newly designed seine is more suitable for the fishing operation in the pool with harder bottom.

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