在对数据有限的拉贾鱼种群进行尺寸结构丰度估算时考虑时空分布变化

IF 3.1 2区 农林科学 Q1 FISHERIES ICES Journal of Marine Science Pub Date : 2024-08-05 DOI:10.1093/icesjms/fsae106
Timo Michael Staeudle, Bram Parmentier, Jan Jaap Poos
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引用次数: 0

摘要

过去几十年来,伶鲽类易受捕捞影响以及种群数量下降,促使人们呼吁改善渔业管理和保护工作。大北海生态区的棘背魟(Raja clavata)种群随着工业化捕捞的增加而出现了明显的数量下降,而商业捕捞缺乏可靠的渔获量数据阻碍了对种群丰度的评估。利用独立于渔业的调查渔获量数据,我们采用综合嵌套拉普拉斯近似法估算了 R. clavata 的总丰度和大小级丰度。通过考虑种群的时空变化、调查渔具之间的大小选择性以及最大限度地减少部分重叠调查区域的偏差,我们证明了过去三十年中丰度和分布的重大变化。值得注意的是,英吉利海峡东部和北海东南部丰度的增加导致了种群丰度和生物量的整体增加。我们的研究结果拓展了对这一数据有限种群的时空动态和开发利用的理解,强调了改进种群丰度估计的潜力,为未来的种群评估提供信息。
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Accounting for spatio-temporal distribution changes in size-structured abundance estimates for a data-limited stock of Raja clavata
Vulnerability of elasmobranchs to fishing and declines in populations over the last decades have prompted calls for improved fisheries management and conservation efforts. The Raja clavata (Thornback ray) population in the Greater North Sea ecoregion is a population that has historically shown marked declines with increasing industrialized fishing, while a lack of robust catch data of commercial fisheries hampers assessment of population abundance. Using fisheries-independent survey catch data haul-by-haul surface area estimates, we employ integrated-nested Laplace approximation to estimate total and size-class abundances of R. clavata. By accounting for spatio-temporal changes in the population, size selectivity between survey gears, and minimizing bias from partially overlapping survey areas, we demonstrate major changes in the abundance and distribution over the past three decades. Notably, increases of abundance in the Eastern English Channel and south-eastern North Sea result in an overall increase in the abundance and biomass of the population. Our findings expand understanding of the spatio-temporal dynamics and exploitation of this data-limited stock, emphasizing the potential for improved population abundance estimates to inform future stock assessments.
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来源期刊
ICES Journal of Marine Science
ICES Journal of Marine Science 农林科学-海洋学
CiteScore
6.60
自引率
12.10%
发文量
207
审稿时长
6-16 weeks
期刊介绍: The ICES Journal of Marine Science publishes original articles, opinion essays (“Food for Thought”), visions for the future (“Quo Vadimus”), and critical reviews that contribute to our scientific understanding of marine systems and the impact of human activities on them. The Journal also serves as a foundation for scientific advice across the broad spectrum of management and conservation issues related to the marine environment. Oceanography (e.g. productivity-determining processes), marine habitats, living resources, and related topics constitute the key elements of papers considered for publication. This includes economic, social, and public administration studies to the extent that they are directly related to management of the seas and are of general interest to marine scientists. Integrated studies that bridge gaps between traditional disciplines are particularly welcome.
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