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Catchability of the southern rock lobster Jasus edwardsii. II. Effects of size


Ziegler, PE and Johnson, CR and Frusher, SD and Gardner, C, Catchability of the southern rock lobster Jasus edwardsii. II. Effects of size, Marine and Freshwater Research, 53, (8) pp. 1149-1159. ISSN 1323-1650 (2002) [Refereed Article]

DOI: doi:10.1071/MF01244


For most of the year, the size-frequency distribution of trap-caught southern rock lobster, Jasus edwardsii, reflected size-specific catchability rather than the size-frequency distribution of the population in a scientific reserve in Tasmania, Australia. The size-frequency distributions of the population on the ground and of lobsters captured in traps were similar only during a few months, typically during moulting and mating. Small males and females were usually under-represented in traps. Catchability generally increased with size, but varied with sex and season. During moulting and mating, size-specific catchability and relative selectivity of larger animals were similar to or lower than for smaller animals. The relative pattern of catchability throughout the year was similar for most size classes within each sex. Negative associations between small and large lobsters in traps were stronger in winter than in summer, indicating strong behavioural interactions. These interactions could explain the lower catchability of smaller lobsters. Relative selectivity estimates using tag-recapture and size-specific catchability data provided generally similar results.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - wild caught not elsewhere classified
UTAS Author:Ziegler, PE (Dr Philippe Ziegler)
UTAS Author:Johnson, CR (Professor Craig Johnson)
UTAS Author:Frusher, SD (Professor Stewart Frusher)
UTAS Author:Gardner, C (Professor Caleb Gardner)
ID Code:25178
Year Published:2002
Web of Science® Times Cited:17
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2002-08-01
Last Modified:2009-08-06

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