Intrinsic rebound potentials of 26 species of Pacific sharks
Intrinsic rebound potentials of 26 species of Pacific sharks
复制标题
26 种太平洋鲨鱼的内在反弹潜力
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Christina Show
中科院分区：
文献类型：
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作者：
Susan E. Smith;D. Au;Christina Show
人口统计技术被用来比较的内在率的人口增长的26种鲨鱼假设暴露于捕捞死亡率。这些比率（r2 M）被用来衡量不同鲨鱼从捕捞压力中恢复的相对能力。该方法采用了密度依赖的概念，从标准的人口模型，并使用女性的成熟年龄，最大生殖年龄，平均生育力。在可能的范围内，考虑到生活史参数的限制，假设成体前存活对种群减少的补偿反应。“反弹”生产力的强烈影响，成熟时的年龄和最大年龄的影响不大。最低值（r2 M 0.08）的物种是小沿海，早熟的物种。中等值（r2 M = 0.04-0.07）的鲨鱼大多是大型（最大尺寸> 250厘米）远洋鱼种，生长较快，成熟较早。可能的选择压力，这三个鲨鱼组，管理的影响，实际应用中推导出的参数r2 M，并建议研究领域进行了讨论。
A demographic technique is used to compare the intrinsic rates of population increase of 26 shark species hypothetically exposed to fishing mortality. These rates (r2M) are used as a measure of the relative ability of different sharks to recover from fishing pressure. The method incorporates concepts of density dependence from standard population modelling and uses female age at maturity, maximum reproductive age, and average fecundity. A compensatory response to population reduction is assumed in pre-adult survival to the extent possible given the constraints of the life-history parameters. ‘Rebound’ productivity was strongly affected by age at maturity and little affected by maximum age. Species with lowest values (r2M 0.08) were small coastal, early-maturing species. Sharks with mid-range values (r2M = 0.04–0.07) were mostly large (> 250 cm maximum size) pelagic species, relatively fast growing and early maturing. Possible selection pressures for these three shark groups, management implications, practical applications for the derived parameter r2M, and recommended areas of research are discussed.