印度洋长鳍金枪鱼不同生活史阶段栖息地时空分布
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上海海洋大学海洋科学与生态环境学院, 上海 201306

作者简介:

徐胜(2000-),男,硕士研究生,研究方向为渔业资源评估与管理.E-mail:xusheng00417@163.com

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S931

基金项目:

国家自然科学基金项目(32072981)


The spatial-temporal distribution of habitat of Indian Ocean albacore tuna (Thunnus alalunga) at different life history stages
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College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306 , China

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    摘要:

    长鳍金枪鱼(Thunnus alalunga)是印度洋金枪鱼渔业的重要目标鱼种。作为中上层洄游性鱼类, 其分布受到海洋环境的影响。为探究海洋环境变动对长鳍金枪鱼栖息地时空分布的影响,本研究利用2001—2016年印度洋海洋环境数据, 构建了印度洋长鳍金枪鱼不同生活史阶段的栖息地模型, 通过对比模型预测的适宜栖息地位置与实际渔获量分布的关系对模型准确性进行了验证, 使用受试者工作特征曲线下的面积(area under curve, AUC)对模型进行了评价, 并在此基础上分析了不同生活史阶段长鳍金枪鱼适宜栖息地的年际变动。研究结果表明: (1) 渔获量大值区与模型预测的适宜栖息地基本重合, 性未成熟与性成熟长鳍金枪鱼栖息地模型月平均AUC值分别为0.79和0.73, 预测准确率较高; (2) 模型预测的性未成熟长鳍金枪鱼适宜栖息地在1—6月位于25°S~40°S海域, 7—12月位于20°S~40°S海域; 性成熟长鳍金枪鱼适宜栖息地在产卵期位于10°S~25°S马达加斯加岛以东海域, 非产卵期位于25°S~45°S海域; (3) 性未成熟与性成熟长鳍金枪鱼适宜栖息地都呈逐年南移趋势。以上结果对理解长鳍金枪鱼种群动态、促进其资源可持续利用具有重要科学意义。

    Abstract:

    Albacore tuna (Thunnus alalunga) is an economically important fish in tuna fishery in the Indian Ocean. As a pelagic migratory fish, its distribution is significantly influenced by the marine environment. In this study, we used environmental data from the Indian Ocean spanning from 2001 to 2016 to construct a habitat model for different life history stages of albacore tuna and their corresponding environmental requirements. We validated the accuracy of the model by comparing the predicted suitable habitat locations with the actual distribution of catch quantities. We evaluated the model using the area under the receiver operating characteristic curve (area under curve, AUC) and analyzed the inter-annual variations of suitable habitat at different life history stages of albacore tuna to examine the impact of marine environmental changes on spatial-temporal habitat distribution. The results indicated that: (1) The high catch areas largely overlap with the model-predicted suitable habitat, with monthly average AUC values of 0.79 for immature and 0.73 for mature albacore tuna habitat models, showing high prediction accuracy. (2) The model predicted that suitable habitat for immature albacore tuna was located between 25°S and 40°S in the Indian Ocean from January to June and between 20°S and 40°S from July to December. For mature albacore tuna, the suitable habitat during the spawning period is located east of Madagascar Island between 10°S and 25°S, whereas during the non-spawning period, it is between 25°S and 45°S. (3) Both the suitable habitats for immature and mature albacore tuna showed a year-on-year trend of southward migration. The above results have significant scientific importance for understanding the population dynamics of albacore tuna and promoting sustainable resource utilization.

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引用本文

徐胜,官文江.印度洋长鳍金枪鱼不同生活史阶段栖息地时空分布[J].中国水产科学,2025,32(2):214-227
XU Sheng, GUAN Wenjiang. The spatial-temporal distribution of habitat of Indian Ocean albacore tuna (Thunnus alalunga) at different life history stages[J]. Journal of Fishery Sciences of China,2025,32(2):214-227

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  • 收稿日期:2024-07-24
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  • 在线发布日期: 2025-05-06
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