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Surviving a sea-change: survival of southern rock lobster (Jasus edwardsii) translocated to a site of fast growth

Citation

Green, BS and Gardner, C, Surviving a sea-change: survival of southern rock lobster (Jasus edwardsii) translocated to a site of fast growth, ICES Journal of Marine Science, 66, (4) pp. 656-664 . ISSN 1054-3139 (2009) [Refereed Article]


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The definitive publisher-authenticated version is available online at: http://www.oxfordjournals.org

Official URL: http://icesjms.oxfordjournals.org

DOI: doi:10.1093/icesjms/fsp030

Abstract

In an experiment aimed at increasing the yield and value of the fishery for southern rock lobster (Jasus edwardsii), 1998 pale and slowgrowing lobsters were translocated to sites where lobsters grow faster naturally and develop higher value market traits. Survival of lobsters in their new habitat was critical to the viability of this experiment. To estimate survival, the release site was surveyed every 1–3 months for 2 years. Apparent survival of translocated lobsters was compared with survival of resident lobsters tagged in a similar period using Cormack–Jolly–Seber modelling on mark–recapture data. Lobster survival was not influenced by size, gender, or origin (translocated or resident) alone. The four most parsimonious models suggested slightly lower apparent survival in translocated lobsters immediately after release compared with all other lobsters, but support for these models was weak (PQAICc weights 62%). The differences in apparent survival were not likely to be significant because of large variance when averaged over all the models. Apparent survival of newly released translocated lobsters was 92% (72–98, 95% CI) compared with 97% (95–98, 95% CI) for all other lobsters. Potential sources of differences in survival are movement from the release site or greater predation on pale lobsters. Losses of lobster through release mortality were low and unlikely to influence the feasibility of translocation as a tool to enhance the value of the fishery, although it would be prudent to include 5% mortality of translocated lobsters in future models of translocation feasibility.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Natural Resource Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Wild Caught Crustaceans (excl. Rock Lobster and Prawns)
Author:Green, BS (Associate Professor Bridget Green)
Author:Gardner, C (Professor Caleb Gardner)
ID Code:56578
Year Published:2009
Web of Science® Times Cited:15
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2009-05-13
Last Modified:2010-04-22
Downloads:0

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