基于sdmTMB的大西洋剑鱼延绳钓渔业CPUE标准化

CPUE standardisation in the Atlantic swordfish longline fishery based on sdmTMB

摘要:

为了提高评估结果的可靠性并支持可持续管理,在进行种群资源评估前,评估单位捕捞努力量渔获量（Catch per unit effort,CPUE）标准化方法的稳健性是必要的。渔业资源评估需要长期且连续的工作,其精确性对于管理决策和物种保护至关重要。基于1995—2022年间大西洋西班牙延绳钓船队的数据进行分析,利用sdmTMB方法对大西洋剑鱼（Xiphias gladius）渔业的CPUE进行标准化,同时利用Mohn's ρ方法进行回溯性分析,验证13个不同时间序列数据（A~M）的稳健性。结果显示,不同时间序列的标准化CPUE的结果差异较小,回溯性分析进一步确认了其一致性。研究表明,sdmTMB方法对大西洋剑鱼进行CPUE标准化具有较高的稳健性,能够准确反映该种群的相对资源丰度。本研究可为可靠的资源评估及科学的渔业管理决策提供有力的支持。

关键词:大西洋剑鱼;CPUE标准化;稳健性;sdmTMB

Abstract:

In order to improve the reliability of assessment results and support sustainable management, evaluating the robustness of methods for standardizing catch per unit effort （CPUE） prior to stock resource assessment is necessary.Fishery stock assessments require long-term and continuous work, and their accuracy is critical for management decisions and species conservation.In this study, we analysed data from the Spanish longline fleet in the Atlantic Ocean between 1995 and 2022 to standardize CPUE in the Atlantic swordfish fishery using the sdmTMB method, and a retrospective analysis using Mohn's ρ method was conducted to validate the robustnessof 13 different time series of data （A-M）. The results demonstrated minor variations in the standardized CPUE outcomes across different time series. The retrospective analysis further validated the consistency of the standardized CPUE outcomes.The study concluded that the sdmTMB method for standardized CPUE of Atlantic swordfish exhibited high stability and can accurately reflect the relative resource abundance of this stock.This study provides substantial support for reliable resource assessment and scientific fisheries management decisions.

Key words:Atlantic swordfish;CPUE standardization;robustness;sdmTMB