title: The Influence of Mark-Recapture Sampling Effort on Estimates of Rock Lobster Survival.
abstract: 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.
authors.affiliation: Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, Australia.
authors.forename: Ziya
authors.initials: Z
authors.lastname: Kordjazi
authors.affiliation: Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, Australia.
authors.forename: Stewart
authors.initials: S
authors.lastname: Frusher
authors.affiliation: Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, Australia.
authors.forename: Colin
authors.initials: C
authors.lastname: Buxton
authors.affiliation: Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, Hobart, Australia.
authors.forename: Caleb
authors.initials: C
authors.lastname: Gardner
authors.affiliation: ARC Center for Excellence in Environmental Decisions, University of Melbourne, Melbourne, Australia.
authors.forename: Tomas
authors.initials: T
authors.lastname: Bird
mesh_terms: D025041:Animal Migration; D000818:Animals; D001315:Australia; D003710:Demography / Q000706:statistics & numerical data*; D005260:Female; D005398:Fisheries; D008297:Male; D008954:Models, Biological; D033521:Palinuridae / Q000502:physiology*; D011156:Population Density; D012494:Sampling Studies; D016019:Survival Analysis