Predicting gear used in a multi-gear coastal fleet

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2024-10-23 DOI:10.1016/j.fishres.2024.107199

P. Leitão , A. Campos , M. Castro

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引用次数: 0

Abstract

Knowledge of the gear used in multi-gear fisheries is crucial for supporting fisheries management. Still, the high complexity and lack of data in the Portuguese multi-gear coastal fleet compromise this task. The present study developed a method to predict main fishing gear used in each fishing trip for the Portuguese multi-gear coastal fleet based on landing records (species caught, port, and month of landing). Landing records were used to predict gear (available for part of the fleet with electronic logbooks) using a machine learning model (random forest). This model was then applied to the remaining trips of the fleet, without electronic logbooks, to predict the gear used. A total of six gear types were considered: bivalve dredges, traps, gillnets, trammel nets, drifting longlines, and bottom longlines. The overall model prediction error was 14 %; bivalve dredges and longlines had the lowest errors, and trammel nets and gillnets were the highest. The study sheds new light on important aspects of the dynamics of this fleet, namely a decreasing trend in the use of longlines, poor electronic logbook coverage for some gear types, and greater diversity in the catches obtained with nets compared to other gear types.

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预测多齿轮沿海船队使用的渔具

了解多渔具渔业使用的渔具对于支持渔业管理至关重要。然而，葡萄牙沿海多渔具船队的高度复杂性和数据的匮乏影响了这一任务的完成。本研究根据上岸记录（渔获物种、港口和上岸月份）开发了一种方法，用于预测葡萄牙多渔具沿海船队每次出海捕鱼所使用的主要渔具。使用机器学习模型（随机森林）预测渔具（部分船队有电子航海日志）的上岸记录。然后将该模型应用于没有电子航海日志的船队的其余航次，以预测所使用的渔具。共考虑了六种渔具类型：双壳耙网、诱捕器、刺网、三重刺网、漂流延绳和底层延绳。模型的总体预测误差为 14%；双壳耙网和延绳钓的误差最小，三层刺网和刺网的误差最大。这项研究揭示了该船队动态的一些重要方面，即延绳钓的使用呈下降趋势，某些渔具类型的电子日志覆盖率较低，以及与其他渔具类型相比，网具渔获量的多样性更大。

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来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.