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加拿大新斯科舍省西南部美洲龙虾（Homarus americanus）性比的时空格局。

Spatial and temporal patterns in the sex ratio of American lobsters (Homarus americanus) in southwestern Nova Scotia, Canada.

机构信息

Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, C1A 4P3 PE, Canada.

Department of Computer and Information Sciences, University of Strathclyde, Glasgow, G1 1XQ, UK.

出版信息

Sci Rep. 2021 Dec 16;11(1):24100. doi: 10.1038/s41598-021-03233-8.

DOI:10.1038/s41598-021-03233-8
PMID:34916552
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8677755/
Abstract

An approximate 1:1 sex ratio of American lobsters can be skewed due to environmental factors or fisheries management. Substantial skewness can impact mating behaviour and lower reproduction which could have far-reaching ecological and economic consequences. The aim was to investigate the sex ratio patterns of lobsters in two lobster fishing areas (LFAs) in southwestern Nova Scotia, Canada and identify factors associated with skewed sex ratios. This study analyzed biological data from more than 270,000 lobsters sampled over ten years (2010-2019) by the Fishermen and Scientists Research Society. A mixed effect logistic regression model evaluated the effect of spatial, temporal and environmental factors as well as size on the sex ratio of lobsters. There were significant temporal patterns in sex ratios that differed by LFA. After the effects of sampling month, year and LFA were accounted for, lower bottom temperature and deeper water depth were associated with a higher prevalence of females, especially in larger lobsters. We present the first long term analyses of sex ratio patterns in H. americanus in Atlantic Canada's most commercially important region for this species and provide evidence that these patterns are influenced by environmental factors and fisheries. In view of future climate change scenarios, monitoring the population dynamics of this iconic fishery species is crucial to ensure sustainable fisheries and healthy lobster stocks.

摘要

由于环境因素或渔业管理，美洲龙虾的雌雄比例接近 1:1 可能会出现偏差。明显的偏斜会影响交配行为和繁殖率，从而对生态和经济产生深远影响。本研究旨在调查加拿大新斯科舍省西南部两个龙虾捕捞区（LFAs）龙虾的性别比例模式，并确定与性别比例偏差相关的因素。本研究分析了渔民和科学家研究协会十年来（2010-2019 年）对超过 27 万只龙虾进行采样的生物学数据。混合效应逻辑回归模型评估了空间、时间和环境因素以及大小对龙虾性别比例的影响。性别比例存在显著的时间模式，不同的 LFAs 存在差异。在考虑了采样月份、年份和 LFA 的影响后，较低的底层温度和较深的水深与雌性比例较高有关，尤其是在较大的龙虾中。我们首次对加拿大大西洋地区最具商业重要性的地区的 H. americanus 性别比例模式进行了长期分析，并提供了证据表明这些模式受环境因素和渔业的影响。考虑到未来的气候变化情景，监测这种标志性渔业物种的种群动态对于确保可持续渔业和健康的龙虾种群至关重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/013a/8677755/32d632418b0d/41598_2021_3233_Fig7_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/013a/8677755/32d632418b0d/41598_2021_3233_Fig7_HTML.jpg
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