摘要
以2001和2002年在台湾海峡南部底拖网渔获物采集的金线鱼样品,进行渔获群体结构、生长和死亡的研究。结果表明,2001和2002年金线鱼渔获群体叉长范围86—282mm,优势组191—220mm,平均210.3mm。体重范围10—375g,优势组131—200g,平均170.9g。年龄范围0—4龄,优势组1龄,平均1.05龄。生长参数L∞为373.4 mm,W∞为967.6g,生长速率k为0.2769,t0为-1.0784(理论叉长为零时的年龄),体重生长拐点tr为2.864 4龄。总死亡系数为1.684 4,自然死亡系数为0.665 6,捕捞死亡系数为1.018 8,开发比率高达0.604 8。最小可捕叉长为177.64 mm,最小可捕体重为103.36g。该渔场自1994年以来连续13年超过了估算的最大可持续渔获量和最大可持续捕捞力量,必须严格控制该海区渔业的投入和产出量及开捕规格。
According to the biological data obtained through bottom trawl in the southern Taiwan Strait during 2001--2002, the population structure, growth and mortality character of Nemipterus virgatus were studied. The results showed that, the fork length of the fish population ranged from 86 to 282mm, with 191--220mm being predominant, and the average was 210.3mm; the body weight ranged from 10 to 375g, with 131--200g being predominant, and the average was 170. 9g; and the age ranged from 0 to 4 years, with 1 year being predominant, and the average was 1.05 year. The growth parameters were as follows. L∞=373.4mm, W∞=967.6g, k=0.2769, t0= -1. 0784 （to is the age when the theoretical fork length is 0）. The age of the growth inflexion point of body weight （tr） was 2. 8644 years, the rates of total mortality, natural mortality and fishing mortality were found to be 1. 6844, 0. 665 6 and 1.018 8, respectively. The minimum capture fork length and body weight were 177.64mm and 103.36g, respectively. Since 1994, the annual actual catch of Nemipterus virgatus had exceeded its maximum sustainable yield and maximum sustainable effort for 13 years, and the juvenile Nemipterus virgatus was heavily captured, inducing an exploitation rate as high as 0.604 8. Therefore, it is suggested that the protection and management of the fish resources should be intensified, and powerful measures should be taken to control the fishing efforts and catches, especially the capture size, thus to restore the fishery resources, and achieve sustainable development and sustainable use of fish stocks.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2008年第5期73-77,共5页
Journal of Tropical Oceanography
基金
福建省海洋与渔业局资助项目(闽海渔科2001-04)
海洋生物多样性保护项目(2004)
