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首页> 外文期刊>Marine & freshwater research >Contraction of the banana prawn (Penaeus merguiensis) fishery of Albatross Bay in the Gulf of Carpentaria, Australia
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Contraction of the banana prawn (Penaeus merguiensis) fishery of Albatross Bay in the Gulf of Carpentaria, Australia

机译：澳大利亚卡彭塔里亚湾的信天翁湾对虾（Penaeus merguiensis）渔业的收缩

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摘要

When the biomass and area occupied by a stock decline together, catch rates can remain high (hyperstability) and management with effort controls may be ineffectual. Banana prawn (Penaeus merguiensis) catches declined from 2000 until 2005 in the Albatross Bay area in the Gulf of Carpentaria (GOC), Australia. Data from commercial logbooks were used to investigate historical changes in the banana prawn fishery in this and other regions of the Northern Prawn Fishery to infer the potential causes of this decline. Data since 1970 were analysed using: (1) the mapping of catch and effort; and (2) normalised rank order catch curves, to determine the distribution of catches across fishing areas. These analyses show that there has been a marked contraction of the Albatross Bay fishery over 33 years of fishing into the centre of a stable 'hotspot', suggesting a potential mechanism for the observed negative relationship between catchability and biomass. We believe this is the first observation of a Penaeus prawn fishing ground contracting as biomass declines, supporting the view that the contraction of an area occupied by a stock as biomass declines, is a generalised phenomena observed widely across fisheries resources and not a dynamic confined to certain finfish and molluscs.
机译：当生物量和种群所占面积一起下降时，捕捞率可能保持很高（超稳定性），而用努力控制进行管理可能无效。从2000年到2005年，澳大利亚卡彭塔利亚湾（GOC）的信天翁湾地区的香蕉虾（Penaeus merguiensis）捕捞量下降。商业日志记录的数据用于调查北部对虾渔业和其他地区香蕉虾渔业的历史变化，以推断造成这种下降的潜在原因。使用以下方法分析了1970年以来的数据：（1）捕获量和工作量的映射; （2）归一化等级顺序渔获曲线，以确定渔场之间渔获的分布。这些分析表明，在过去33年的捕捞过程中，信天翁湾渔业已明显收缩至稳定“热点”的中心，这表明了观察到的可捕集性与生物量之间负相关的潜在机制。我们认为，这是对虾对虾捕捞场随着生物量下降而收缩的首次观察，支持以下观点：随着生物量下降，种群所占面积的收缩是一种在渔业资源中广泛观察到的普遍现象，而不是仅限于某些鳍鱼和软体动物。

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