An assessment of European bream Abramis brama (Linnaeus, 1758) fishery in the downstream of the Irtysh River in China
An assessment of European bream Abramis brama (Linnaeus, 1758) fishery in the downstream of the Irtysh River in China
复制标题
中国额尔齐斯河下游欧洲鳊鱼 (Linnaeus, 1758) 渔业的评估
DOI：
10.1080/02705060.2018.1538906
复制
发表时间：
2019-01-01
影响因子：
1.3
通讯作者：
Chen, Yong
中科院分区：
文献类型：
--
作者：
Ding, Huiping;Zhang, Zhiming;Chen, Yong
摘要通过对额尔齐斯河下游欧洲鲷（Abramis brama）生长、自然死亡率和成熟度的不确定性进行分析，以评估其状况。Chapman-Robson方法得出的总死亡率（Z）估计值为0.65年-1。自然死亡率（M）估计为0.13年-1和0.26年-1，因此相应的当前捕捞死亡率（Fcur）估计数分别为0.52年-1和0.39年-1。单位补充量产量（YPR）、单位补充量产卵群生物量（SSB/R）和相应的生物参考点（BRP）对M敏感。增长和成熟度参数的不确定性对BRP的估计影响有限，但对YPR和SSB/R输出有很大的影响。结果表明，A.与补充性过度捕捞相比，布拉马可能面临更高的增长性过度捕捞风险。此外，增加tc到9年可能会确保产卵潜力比（SPRs）高于管理目标在所有范围内的F与YPR相对较小的影响，无论M。除了为A. brama在中国额尔齐斯河下游，我们的研究提出了一个全面的方法，可能是有用的数据有限的物种在其他渔业。
Abstract Per-recruit analyses, with consideration for uncertainty in growth, natural mortality and maturity, were conducted for European bream Abramis brama in the downstream section of the Irtysh River in China to assess its status. The Chapman-Robson method produced an estimate of total mortality rate (Z) of 0.65 year−1. The natural mortality rates (M) were estimated as 0.13 and 0.26 year−1, resulting in corresponding estimates of current fishing mortality rate (Fcur) of 0.52 and 0.39 year−1, respectively. All the estimates of yield per recruit (YPR), spawning stock biomass per recruit (SSB/R) and corresponding biological reference points (BRPs) were sensitive to M. The uncertainty of growth and maturity parameters had limited impacts on the estimates of BRPs, but had a large effect on the YPR and SSB/R outputs. Our findings indicate that A. brama may be at higher risk of growth overfishing than those of recruitment overfishing. In addition, increasing the tc to nine years might ensure that the spawning potential ratios (SPRs) are above the management targets under all ranges of F with comparatively small impacts on YPR regardless of M. In addition to providing a basic assessment for A. brama in the downstream of the Irtysh River in China, our study presents a comprehensive approach that may be useful for data-limited species in other fisheries.