期刊
ICES JOURNAL OF MARINE SCIENCE
卷 79, 期 9, 页码 2413-2421出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsac175
关键词
behaviour; fishing pressure; lobster; no-take reserves; Panulirus cygnus; Rottnest Island; sublethal predation
资金
- UWA School of Biological Sciences
This study investigates the impact of recreational fishing on the behaviour of western rock lobster. The results show that the density of legal-sized lobster is higher in no-take reserves compared to fished sites, and lobster in fished sites spend less time with bait.
It is unknown whether lobster behaviour is sensitive to fishing, as has been previously suggested for fish. This study investigated the impacts of recreational fishing on the wariness of western rock lobster (Panulirus cygnus, George) through comparisons between fished sites and no-take reserves (NTRs) at Rottnest Island. We used visual census to survey the density and size structure of lobster at sites inside and outside three comparable NTRs, and baited remote underwater video to study the behaviour of lobster at comparable sites. The density of legal-sized P. cygnus was twice as high within NTRs (0.34 +/- 0.05) than fished sites (0.16 +/- 0.03). P. cygnus also spent less time with bait in fished sites (0.42 +/- 0.15 min) than NTRs (1.15 +/- 0.28 min). This study provides the first evidence that behaviour of decapods, namely P. cygnus, is sensitive to noninjury-related disturbance associated with recreational fishing, with higher wariness in fished areas. Investigation is required into potentially confounding biotic and abiotic factors to further explore the applicability of lobster wariness as an indicator for fishing pressure.
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