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首页> 外文期刊>ICES Journal of Marine Science >Development and evaluation of catch per unit effort indices for southern blue whiting (Micromesistius australis) on the Campbell Island Rise, New Zealand
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Development and evaluation of catch per unit effort indices for southern blue whiting (Micromesistius australis) on the Campbell Island Rise, New Zealand

机译：新西兰坎贝尔岛上升地区南部蓝鳕（Micromesistius australis）的捕捞单位努力量指标的开发和评估

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This paper develops standardized commercial cpue indices for a highly aggregated spawning fishery in New Zealand waters, and verifies the indices using fishery-independent data. Indices were calculated for all vessels using three different measures of effort, and for vessel subsets based on processing type (surimi and dressed), and relative experience in the fishery. Trends in cpue were consistent with trends in fishery-independent acoustic surveys, age composition of the commercial catch, and recent stock assessment results. In particular, the cpue indices tracked the more than fourfold increase in abundance from 1993 to 1996 associated with the recruitment of the strong 1991 year class, and the decline in relative abundance as this year class was fished down. Despite this being a highly aggregated spawning fishery, there was little evidence for hyperstability. There were also significant differences in fishing strategies of the fleets between periods of high and low fish abundance.
机译：本文为新西兰水域中高度聚集的产卵渔业开发了标准化商业线索指数，并使用与渔业无关的数据验证了该指数。使用三种不同的工作量度来计算所有船舶的指数，并根据加工类型（鱼糜和鱼糜）以及渔业的相对经验来计算船舶子集的指数。渔获量趋势与独立于渔业的声学调查，商业捕捞物的年龄组成以及最近的种群评估结果趋势一致。特别是，cpue指数跟踪了从1993年到1996年与1991年强势班级的招募有关的丰度增长的四倍多，以及随着这一年级的垂钓而相对富裕度的下降。尽管这是高度聚集的产卵渔业，但很少有证据表明其超稳定。高和低鱼丰度期之间船队的捕捞策略也存在显着差异。

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