Predicting bycatch hotspots based on suitable habitat derived from fishery-independent data

文献类型： 外文期刊

第一作者： Runnebaum, Jocelyn

作者： Runnebaum, Jocelyn;Tanaka, Kisei R.;Guan, Lisha;Cao, Jie;Chen, Yong;O'Brien, Loretta;Runnebaum, Jocelyn;Tanaka, Kisei R.;Guan, Lisha;Cao, Jie

作者机构：

关键词： Habitat modeling; Data limited management; Bycatch hotspots

期刊名称：MARINE ECOLOGY PROGRESS SERIES （ 影响因子：2.824； 五年影响因子：3.09 ）

ISSN： 0171-8630

年卷期： 2020 年 641 卷

页码：

收录情况： SCI

摘要： Bycatch remains a global problem in managing sustainable fisheries. A critical aspect of management is understanding the timing and spatial extent of bycatch. Fisheries management often relies on observed bycatch data, which are not always available due to a lack of reporting or observer coverage. Alternatively, analyzing the overlap in suitable habitat for the target and non-target species can provide a spatial management tool to understand where bycatch interactions are likely to occur. Potential bycatch hotspots based on suitable habitat were predicted for cusk Brosme brosme incidentally caught in the Gulf of Maine American lobster Homarus americanus fishery. Data from multiple fisheries-independent surveys were combined in a delta-generalized linear mixed model to generate spatially explicit density estimates for use in an independent habitat suitability index. The habitat suitability indices for American lobster and cusk were then compared to predict potential bycatch hotspot locations. Suitable habitat for American lobster has increased between 1980 and 2013 while suitable habitat for cusk decreased throughout most of the Guff of Maine, except for Georges Basin and the Great South Channel. The proportion of overlap in suitable habitat varied interannually but decreased slightly in the spring and remained relatively stable in the fall over the time series. As Gulf of Maine temperatures continue to increase, the interactions between American lobster and cusk are predicted to decline as cusk habitat continues to constrict. This framework can contribute to fisheries managers' understanding of changes in habitat overlap as climate conditions continue to change and alter where bycatch interactions could occur.

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