Evaluation of a novel research trap for surveys of blue swimmer crab populations

نویسندگان

چکیده

Surveying free-ranging crab populations is important for monitoring the health of exploited stocks and predicting future productivity. Here, we present a novel research trap design use in fisheries-independent surveys blue swimmer (Portunus armatus) populations, evaluate against some existing approaches within an independent survey framework. Specifically, aimed to improve efficiency capturing smaller crabs, without adversely affecting catches larger crabs. We quantify report abundance selectivity these traps, relative co-located samples obtained using beam trawls standard commercial round establish whether small-mesh traps may offer any improvements over methods. Comparison evaluation other gear, different places at times, showed that are more effective catching crabs when they present, equally or size classes The trawl appeared be reasonable range crabs; however, number caught (using similar investment time) was substantially lower than traps. This appears suitable portunid species.

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ژورنال

عنوان ژورنال: Marine and Freshwater Research

سال: 2022

ISSN: ['1448-6059', '1323-1650']

DOI: https://doi.org/10.1071/mf21005