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首页> 外文期刊>ICES Journal of Marine Science >Did over-reliance on commercial catch rate data precipitate the collapse of northern cod?
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Did over-reliance on commercial catch rate data precipitate the collapse of northern cod?

机译：对商业捕捞率数据的过度依赖是否会导致北部鳕鱼的崩溃？

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摘要

It has been suggested that a number of "lessons" can be learned from the collapse of the northern cod stock off Newfoundland and Labrador. However, not all purported lessons have been validated with available data. One lesson is thought to be that over-reliance on commercial catch rate data and an incorrect assumption regarding the functional relationship between catch rate and population size were major contributors to overestimating stock size, precipitating the collapse. The current study describes calibration approaches used in assessments, and evaluates alternative functional relationships between commercial catch rates and stock size. In addition, historical population size is re-estimated using only research vessel data and compared with estimates obtained based on both commercial catch rate and research vessel data. Calibration with commercial catch rate contributed to overestimating stock size in some years, but there is no evidence that the assumed functional relationship between commercial catch rate and population size was a significant factor in the collapse.
机译：有人建议，从纽芬兰和拉布拉多海域北部鳕鱼种群的崩溃中可以吸取很多教训。但是，并非所有声称的课程都已得到可用数据的验证。人们认为，有一个教训是，过度依赖商业捕捞率数据以及关于捕捞率与人口规模之间的函数关系的错误假设是导致高估种群规模，加剧崩溃的主要原因。当前的研究描述了评估中使用的校准方法，并评估了商业捕获率和种群规模之间的替代功能关系。此外，仅使用研究船的数据重新估算历史人口规模，并与基于商业捕捞率和研究船的数据获得的估算值进行比较。用商业捕捞率进行标定在某些年里导致高估了种群规模，但是没有证据表明商业捕捞率和种群数量之间的假定功能关系是崩溃的重要因素。

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