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张健，等 水产学报, 2025, 49(7): 079701

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Behavioral responses of decapod crustaceans to fishing pots

1,2*
1
1
ZHANG Jian , TENG Yuxiu , SONG Houcheng , SHI Jiangao 3
1. College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China;
2. Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, National Engineering Research Centre for
Oceanic Fisheries, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;
3. East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China

Abstract: With the resurgence of pot fisheries, issues such as discards and mortality of bycatch species and sublegal-sized tar-
gets in decapod crustacean pot/trap fisheries have emerged as a central concern in the study of the ecological impacts of fishing.
A comprehensive understanding of the mechanisms underlying the response behaviors of target species to pots and their com-
ponents is critical for optimizing fishing performance, mitigating ecological impacts of the fisheries, and advancing sustainable
fisheries management within an ecosystem-based framework.This review initiates with an extensive retrieval of existing literat-
ure, systematically categorizing the sequential behavioral responses, from initial bait attraction through capture or escape, of
individual or grouped decapod crustaceans to pots into six distinct phases: arousal, location and approach, entrance search,
entry, inside the pot, and escape. A standardized quantitative index system is proposed to evaluate the density and intensity of
behaviors at each phase. Then, utilizing these behavioral metrics, this review synthesizes the response mechanisms and behavi-
oral patterns exhibited by the main decapod crustacean species in major global commercial pot fisheries. Comparative analyses
are conducted to elucidate interspecific variations in behavioral responses to different pot designs, while identifying the prin-
cipal factors influencing behavioral patterns for each behavioral phase. Furthermore, this review explores the potential applica-
tions of these findings in the optimization of pot/trap design, including bait, entrance design, structural features, and escape
devices. Such insights have significant potential for reducing bycatch, mitigating ghost fishing effects, and guiding the develop-
ment of ecologically sustainable, eco-friendly pot designs.This review also addresses methodological challenges inherent in cur-
rent research on decapod crustacean behavioral responses to pot/trap, particularly those arising from discrepancies in experi-
mental observation techniques, phase delineation, and behavioral quantification methodologies. These challenges hinder a uni-
fied understanding of individual and collective behavioral patterns. By providing a critical evaluation of these limitations, this
review additionally offers a conceptual framework and methodological insights for future research on marine organism behavi-
oral responses to pot/trap, as well as for the development of pot/trap that aligns with the objectives of contemporary fisheries
management and conservation strategies.
Key words: decapod crustaceans; fishing pots; behavioral responses; arousal; location and approach; entry; escape
Corresponding author: ZHANG Jian. E-mail: j-zhang@shou.edu.cn

Funding projects: National Natural Science Foundation of China (31001138); National Key Research and Development Pro-
gram of China (2024YFD2400200)

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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