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Survival and movement of naive juvenile spiny lobsters returned to the wild


Mills, D and Gardner, C and Oliver, M, Survival and movement of naive juvenile spiny lobsters returned to the wild, Journal of Experimental Marine Biology and Ecology, (324) pp. 20-30. ISSN 0022-0981 (2005) [Refereed Article]

DOI: doi:10.1016/j.jembe.2005.04.003


Using multistate Arnson-Schwartz (AS) mark-recapture models, we show that naïve (captive reared) juvenile southern rock lobsters (Jasus edwardsii, Hutton 1875) survived as well as wild-caught lobsters when released to an area of coastal reef. Lobsters captured as pueruli were ongrown in tanks for 12 to 18 months where they were fed to satiation in the absence of predators. Lobsters were marked with antennal tags each carrying a unique code, and released to coastal reef along with tagged wild-caught lobsters of similar size. During 8 dive surveys of the release reef and 3 surveys of adjacent reefs over a 28 day period, divers resighted 40.3% of the naïve lobsters and 70.2% of the wild lobsters. We show that this discrepancy is a function of differing movement rates and spatial differences in resighting probability. The probability of naïve lobsters moving from the release reef to adjacent areas in the first 4 days post-release (0.72 ± 0.04 S.E.) was almost twice that of wild-caught lobsters (0.38 ± 0.08 S.E.). This behavioural difference did not influence daily apparent survival (0.98 ± 0.016 S.E.), which was constant between groups and over time. Our results are encouraging for the potential of enhancing spiny lobster stocks by releasing juveniles, and demonstrate the utility of AS mark-recapture models as a tool for evaluating medium-term survival of mobile marine species.

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:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
ID Code:38915
Year Published:2005
Web of Science® Times Cited:13
Deposited By:TAFI - Zoology
Deposited On:2005-08-01
Last Modified:2011-07-01

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