摘要
对 1 98 9~ 1 998年台湾海峡南部渔场生产记录资料分析结果表明 :灯光围网捕捞主要捕捞年适宜水温 1 6 .1~ 30℃ ,年较佳水温 2 0 .1~ 30℃ ,年最佳选择水温 2 1 .1~ 2 9℃ .环境水温过高或过低 ,不利于灯光围网生产 .各季度的选择水温 ,冬季为 2 1 .1~ 2 4℃ ,春季为 2 1 .1~ 2 7℃ ,夏季为 2 6 .1~ 2 9℃ ,秋季为 2 5 .1~ 2 8℃ ;各月选择水温为该月环境水温的中间值至偏高 2℃ ,多数比中间值偏高 1~ 2℃ .选择水温范围的宽幅 3~ 5℃ ;随环境水温升高或降低 ,鱼类对水温选择发生同向、同步的变化 ,是一种渐进的过程 ;在环境水温上升或持续高温 ,温跃层存在、底层低温涌升水强盛的条件下 ,灯光围网的作业效率均受影响 .
According to the information of light seine fishing in the southern Taiwan Strait from 1989~1998, the result indicated that annual suitable temperature is 16.1~30℃ for light seine fishing, 20.1~30℃ for annual better temperature, 21.1~29℃ for annual better selective temperature. If water temperature is higher or lower, it is not advantageous to light seine fishing. The selective temperature for light seine is 21.1~24℃ in winter, 21.1~27℃ in spring, 26.1~29℃ in summer and 25.1~28℃ in autumn. In various months selective temperature for fishing is the median temperature in that month or is higher 2℃ than the median temperature, higher 1~2℃ mainly. Variable range of selective temperature is 3~5℃. Fish keep up same direction and range with temperature variety in temperature selection. It is affected by press of temperature and is a progressive process. Fishing efficiency of light seine is affected by water temperature rising, continue higher temperature, larger temperature gradient, thermocline or the strong upwelling with lower temperature in bottom.
出处
《台湾海峡》
CAS
CSCD
2001年第2期245-250,共6页
Journal of Oceanography In Taiwan Strait
基金
福建省水产厅资助!项目 (闽水科 :1998 0 8)