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首页> 外文期刊>ICES Journal of Marine Science >Coherent trends in contiguous survey time-series of major ecological and commercial fish species in the Gulf of Maine ecosystem
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Coherent trends in contiguous survey time-series of major ecological and commercial fish species in the Gulf of Maine ecosystem

机译:缅因湾生态系统主要生态和商业鱼类物种连续调查时间序列的连贯趋势

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摘要

Fish are often delineated into distinct population or stock units that reflect human institutional borders more than ecological factors. In the Northwest Atlantic, there are many species in the broader Gulf of Maine area (GOMA), yet the area is surveyed and managed for the most part in the south by the United States and in the north by Canada. Biomass time-series of 19 representative fish species and total biomass from 7 different surveys conducted by the United States and Canada in the GOMA are compared. All species showed coherent trends in relative biomass across at least two survey time-series, and in many species a single trend could describe all time-series trends accurately. For instance, Canadian and the US time-series of Atlantic cod, Atlantic herring, haddock, thorny skate, and goosefish had comparable trends. Conversely, species such as longhorn sculpin and spiny dogfish showed differing survey time-series trends and asynchronous event timing, suggesting that their population dynamics differ spatially. Collectively, the results demonstrate the value of comparing time-series for common species from contiguous ecosystems and elucidate the relative importance of environmental and fishing factors on each species.
机译:鱼通常被划分为不同的种群或种群单位,这些种群或种群单位反映的是人类机构边界,而不是生态因素。在西北大西洋,更广泛的缅因州海湾地区(GOMA)有许多物种,但美国南部和加拿大北部大部分地区对该地区进行了调查和管理。比较了美国和加拿大在GOMA中进行的7次不同调查中19种代表性鱼类的生物量时间序列和总生物量。在至少两个调查时间序列中,所有物种的相对生物量均显示出一致的趋势,而在许多物种中,单个趋势可以准确地描述所有时间序列的趋势。例如,加拿大和美国的大西洋鳕鱼,大西洋鲱鱼,黑线鳕,棘手的滑冰和鹅鱼的时间序列具有可比的趋势。相反,长角horn和多刺dog鱼等物种则显示出不同的调查时间序列趋势和异步事件时间,表明它们的种群动态在空间上有所不同。总的来说,结果证明了比较连续生态系统中常见物种的时间序列的价值,并阐明了环境和捕鱼因素对每个物种的相对重要性。

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