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RESEARCH ARTICLE

Effects of spatial–temporal conditions and fishing-vessel capacity on the capture of swimming crabs by using different fishing gear around the waters of Taiwan

Muhamad Naimullah https://orcid.org/0000-0002-6415-0951 A , Kuo-Wei Lan https://orcid.org/0000-0002-2637-2932 A B * , Cheng-Hsin Liao A , Yu-Jhen Yang A , Chao-Ching Chen C , Hon Jung Liew D E and Mhd Ikhwanuddin D F G
+ Author Affiliations
- Author Affiliations

A Department of Environmental Biology Fisheries Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan, Republic of China.

B Center of Excellence for Oceans, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan, Republic of China.

C Department of Fisheries Production and Management, National Kaohsiung University of Science and Technology, 142 Haijhuan Road, Nanzih District, Kaohsiung City 81157, Taiwan, Republic of China.

D Higher Institution Center of Excellent, Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu 21030, Malaysia.

E Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, Heilongjiang, PR China.

F STU-UMT Joint Shellfish Research Laboratory, Shantou, Guangdong 515063, PR China.

G Faculty of Fisheries and Marine, Campus C, Airlangga University, Mulyorejo, Surabaya 60115, Indonesia.

* Correspondence to: kwlan@mail.ntou.edu.tw

Handling Editor: Haseeb Randhawa

Marine and Freshwater Research 74(14) 1244-1261 https://doi.org/10.1071/MF23064
Submitted: 31 March 2023  Accepted: 16 August 2023   Published: 15 September 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

Swimming crab is a vital fishery resource and a valuable source of income in the southern East China Sea, but it lacks management strategies, especially when using different fishing gear.

Aims

This study aimed to determine the effects of spatial–temporal conditions and vessel capacity on swimming crabs by using different fishing-gear types in the Taiwan Strait (TS).

Methods

We used generalised linear mixed models (GLMMs) to investigate data from Taiwanese vessels (2011–2019) on how spatial–temporal conditions and vessel capacity affected the catch of swimming crabs when using trawls, gill-nets and traps.

Key results

The results showed that the traps (>80.0%) caught more swimming crabs in the TS than did the gill-nets (6.6%) and trawls (8.0%). Additionally, the GLMM analysis showed that Charybdis feriatus, Portunus pelagicus and Portunus sanguinolentus catches by traps and trawls were significantly affected by different fishing locations, climate events, work hours and vessel sizes. However, for gill-nets, spatial–temporal conditions and vessel capacity did not affect the catch of C. feriatus.

Conclusions

Monitoring fishing efforts and environmental factors is vital to understanding their impacts on marine ecosystems.

Implications

These findings enable future sustainable crab fishing through harvesting strategy planning, ecosystem management and spatial–temporal governance.

Keywords: crab fishery, crab fishing gear, crab management, crustacean, fisheries management, Portunidae, sustainable fishery, Taiwan Strait.

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