摘要
本文以1981～1984年4～9月累计18个月在闵中、闵东渔场开展中上层鱼类资源开发性探捕调查的材料,报道了扁舵鲣的生态分布、群体结构和生活史主要特征。鱼群先后于4～7月由南而北进入本渔场,数量分布以5月为多;栖息的最适温、盐度分别为23.5～25.5℃和33～34;渔获群体由0～V龄组成;性成熟的最小年龄为Ⅰ龄,最小叉长271～280mm;生长参数L_∞=484.44mm,W_∞=2050.76g,K=0.5109,t_0=0.3598;瞬时自然死亡率为0.8937,开发比率为0.2138,属于轻度利用的鱼类资源,尚有较大的开发潜力。
This paper is based on the data of Auxis thaxard from the resource survey of palegic fishes in the Minzhong and Mindong fishing ground,Fujian from April to September, 1981～1984. The paper reports the ecological distribution,stock structure and the principal characteristics of life history of Auxis thazand. That the fish schools entered this fishing ground are from Southern to Northern from April to July. The numbers of fish schools are more in May than in other months. The best suitable temperature and salinity for this fish are 23.5～25.5℃ and 33～34. The range of fork lengthes of catch stock is 201～469mm. The ages of this fish are from 0 to 5 years old. The youngest age of the first matured is one year old and the fork length is 270～280mm. The parameters of growth are L_∞=484. 44mm,W_∞=2 050. 76g,K=0. 5109,t_0=-0.3598. The instantaneous rate of natural mortality is 0. 893 7. The rate of exploitation is 0. 213 8. The authors infer that the species belong to the fish resources of lower exploitation and the exploitive prospects is better. The key to promote exploitation is to enhance aquatic product processing and fishing technique.
出处
《台湾海峡》
CAS
CSCD
1992年第3期251-256,共6页
Journal of Oceanography In Taiwan Strait
关键词
渔场
扁舵鲣
鱼类
资源生物学
Ecological distribution
stock structure
life history
exploitive rate
resource survey
Auxis thazard
Fujian
