Spatial distributions of Jonah and Atlantic rock crabs in the Georges Bank and Mid-Atlantic Bight regions during 1968–2021

IF 1.8 3区 农林科学 Q2 FISHERIES Marine and Coastal Fisheries Pub Date : 2024-10-28 DOI:10.1002/mcf2.10315
Kaitlynn J. Wade, Michael J. Wilberg, Burton Shank, Daniel W. Cullen
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Abstract

Objective

The commercial importance of Jonah crabs Cancer borealis and Atlantic rock crabs Cancer irroratus has increased over the past few decades, but both species are still data limited. Objectives were to determine the spatial distributions of Jonah and Atlantic rock crabs over time and to estimate associations with environmental variables.

Methods

Data were from the Northeast Fisheries Science Center offshore spring bottom trawl surveys during 1968–2021 on Georges Bank and in the Mid-Atlantic Bight. Environmental preferences for temperature (°C), depth (m), and grain size (ϕ) were estimated using generalized additive models, and the habitat usage between the two crabs were compared using empirical cumulative distribution functions.

Result

The spatial distributions of Jonah and Atlantic rock crabs changed over time. Grain size was the most important environmental variable for predicting presence of Jonah crabs, and depth was the most important variable for explaining presence of Atlantic rock crabs. The generalized additive model with the best cross validation and the lowest Akaike information criterion for both crabs included all environmental, spatial, and temporal variables.

Conclusion

Jonah and Atlantic rock crabs have different spatial distributions and environmental preferences. Jonah crabs preferred slightly warmer temperatures, deeper depths, and muddier sediments than Atlantic rock crabs. As the commercial importance for Jonah crabs increases, information on their population distribution and habitat usage is important for effective management.

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1968-2021 年期间乔治斯滩和大西洋中部海湾区域约拿蟹和大西洋岩蟹的空间分布情况
目标 在过去几十年中,约拿蟹和大西洋岩蟹的商业重要性有所增加,但这两个物种的数据仍然有限。目标确定约拿蟹和大西洋岩蟹随时间变化的空间分布,并估计与环境变量的关系。 方法 数据来自东北渔业科学中心 1968-2021 年期间在乔治滩和大西洋中部海湾进行的近海春季底拖网调查。利用广义加法模型估计了两种蟹对温度(°C)、深度(m)和粒径(j)的环境偏好,并利用经验累积分布函数比较了两种蟹对生境的利用情况。 结果 约拿蟹和大西洋石蟹的空间分布随着时间的推移而变化。粒径是预测约拿蟹出现的最重要环境变量,而深度则是解释大西洋岩蟹出现的最重要变量。对这两种蟹而言,交叉验证效果最好、阿凯克信息准则最低的广义加法模型包括所有环境、空间和时间变量。 结论 约拿蟹和大西洋岩蟹具有不同的空间分布和环境偏好。与大西洋岩蟹相比,约拿蟹更喜欢温度稍高、水深较深和泥泞的沉积物。随着约拿蟹商业重要性的增加,有关其种群分布和栖息地使用情况的信息对有效管理非常重要。
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来源期刊
Marine and Coastal Fisheries
Marine and Coastal Fisheries FISHERIES-MARINE & FRESHWATER BIOLOGY
CiteScore
3.40
自引率
5.90%
发文量
40
审稿时长
>12 weeks
期刊介绍: Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science publishes original and innovative research that synthesizes information on biological organization across spatial and temporal scales to promote ecologically sound fisheries science and management. This open-access, online journal published by the American Fisheries Society provides an international venue for studies of marine, coastal, and estuarine fisheries, with emphasis on species'' performance and responses to perturbations in their environment, and promotes the development of ecosystem-based fisheries science and management.
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