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将南海北部白姑鱼分成南海北部大陆架和北部湾两个不同海域群体,根据2 0世纪6 0年代和90年代在南海北部底拖网渔业资源调查资料,利用ELEFAN技术估算了南海北部白姑鱼的生长和死亡参数.结果表明,北部湾和陆架区的生长参数L∞、K、t0 分别为382mm、0. 4 2、- 0 . 16龄和315mm、0 . 35、- 0 . 2 3龄.体重生长拐点年龄tr 分别为2 4 4和2 87龄;瞬时总死亡率(Z)、自然死亡率(M )和捕捞死亡率(F)分别为3. 5 5、0 .93、2. 6 2和3 .12、0 . 85、2 . 2 7;当前开发率为0 74和0 73,资源处于过度利用状态.根据Beverton Holt动态综合模型,建议北部湾和陆架区白姑鱼的最适开捕年龄应大于1 90和1 95龄,相应的开捕体长大于2. 11和16 8mm .
Based on the survey data of bottom trawl fishery resources in the northern South China Sea in the 1960s and 1990s, the whitefish of the northern South China Sea were divided into two groups: the northern shelf and the northern bay of the South China Sea. The ELEFAN technique was used to estimate the Growth and death parameters were calculated.The results showed that the growth parameters L ∞, K, t0 in Beibu Bay and shelf area were 382mm, 0.42, -0.16, 315mm, 0.35, -0.23, respectively. The tr age of inflection point of body weight growth was 224 and 2 87 respectively, and the instantaneous total mortality (Z), natural mortality (M) and fishing mortality (F) were 3. 5 5,0 .93,2 6 2 and 3.12,0. 85,2.27; the current development rate is 0 74 and 0 73, and the resources are over-utilized. According to the dynamic comprehensive model of Beverton Holt, Open catching age should be greater than 1 90 and 1 95-year-old, the corresponding open-trap body grows more than 2. 11 and 16 8mm.