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Performance and physiological responses of combined t-bar and PIT tagged giant mud crabs (Scylla serrata)

Meynecke, Jan-Olaf and Mayze, John and Alberts-Hubatsch, Hilke (2015) Performance and physiological responses of combined t-bar and PIT tagged giant mud crabs (Scylla serrata). Fisheries Research, 170 . pp. 212-216. ISSN 01657836

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Article Link(s): http://dx.doi.org/10.1016/j.fishres.2015.06.013

Abstract

Mud crabs (Scylla spp.) are intensively caught throughout South-East Asia and support a very substantial commercial, recreational fishing and aquaculture industry. Identification of individual animals is important to improve understanding and management of this species. However, tagging of crustaceans is difficult as they frequently molt and internal tags can pose a hazard to consumers. In this pilot study we tested a new method combining passive integrated transponder tags and t-bar tags externally. 45 giant mud crabs (Scylla serrata) were captured from the wild and kept in tanks for a maximum of 10 months. We inserted tags into the abdomen of 35 giant mud crabs and tested a modified method where the combined t-bar/PIT-tag was inserted into the muscle tissue of the rear leg between the dorsal carapace plate and the top of the abdominal flap. Tagged crabs with the modified method showed 85% tag retention for molting crabs. We tested the same method in the field where 852 individuals were tagged with combined t-bar/PIT-tags of which 82 were recaptured showing 100% tag retention but without any evidence of molting having occurred. The tested method of combined t-bar/PIT-tags in giant mud crabs can further improve monitoring for wild and aquaculture populations and can be deployed widely with low cost.

Item Type:Article
Business groups:Crop and Food Science
Subjects:Aquaculture and Fisheries > Fisheries > Fishery research
Aquaculture and Fisheries > Aquaculture > Shellfish culture
Aquaculture and Fisheries > Fisheries > Shellfish fisheries
Deposited On:20 Jul 2015 06:29
Last Modified:20 Jul 2015 06:29

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