Preview

PDF 379Kb

Five annual capture-mark-recapture surveys on Jasus edwardsii were used to evaluate the effect of sample size and fishing effort on the precision of estimated survival probability. Datasets of different numbers of individual lobsters (ranging from 200 to 1,000 lobsters) were created by random subsampling from each annual survey. This process of random subsampling was also used to create 12 datasets of different levels of effort based on three levels of the number of traps (15, 30 and 50 traps per day) and four levels of the number of sampling-days (2, 4, 6 and 7 days). The most parsimonious Cormack-Jolly-Seber (CJS) model for estimating survival probability shifted from a constant model towards sex-dependent models with increasing sample size and effort. A sample of 500 lobsters or 50 traps used on four consecutive sampling-days was required for obtaining precise survival estimations for males and females, separately. Reduced sampling effort of 30 traps over four sampling days was sufficient if a survival estimate for both sexes combined was sufficient for management of the fishery.

Item Type:	Refereed Article
Keywords:	mark-recapture, Jasus edwardsii, southern rock lobster, survival
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Fisheries sciences
Research Field:	Aquaculture and fisheries stock assessment
Objective Division:	Animal Production and Animal Primary Products
Objective Group:	Fisheries - wild caught
Objective Field:	Wild caught rock lobster
UTAS Author:	Kordjazi, Z (Mr Ziya Kordjazi)
UTAS Author:	Frusher, S (Professor Stewart Frusher)
UTAS Author:	Buxton, C (Professor Colin Buxton)
UTAS Author:	Gardner, C (Professor Caleb Gardner)
ID Code:	107825
Year Published:	2016
Web of Science® Times Cited:	5
Deposited By:	Sustainable Marine Research Collaboration
Deposited On:	2016-03-28
Last Modified:	2017-11-03
Downloads:	129 View Download Statistics