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Biotic and abiotic factors affecting the Tasmanian distribution and density of the introduced New Zealand porcelain crab Petrolisthes elongatus


Gregory, LP and Campbell, ML and Primo, C and Hewitt, CL, Biotic and abiotic factors affecting the Tasmanian distribution and density of the introduced New Zealand porcelain crab Petrolisthes elongatus, Aquatic Invasions, 7, (4) pp. 491-501. ISSN 1798-6540 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 The Authors

DOI: doi:10.3391/ai.2012.7.4.006


Petrolisthes elongatus (Milne-Edwards, 1837) was first introduced into southern Tasmania in the late 19th century putatively associated with live-oyster transfers from New Zealand. In the last century P. elongatus populations have expanded, inoculating rocky intertidal zones around Tasmania. We initially identified the scope of P. elongatus introduced range around Tasmania by visiting 57 sites to identify presence. Density of P. elongatus and populations of two native grapsid crab species was assessed at 12 sites around Tasmania to identify any biotic resistance. Abiotic factors including substrate availability and preference, and wave stress, were identified at each of the 57 sites. Our results indicate that P. elongatus has successfully invaded a large proportion of the southern and northern coasts of Tasmania, with a small number of sites on the east and none on the west coast supporting P. elongatus populations. Densities were found to be higher in southern Tasmania compared to the eastern and northern coastlines. Petrolisthes elongatus presence was found to be positively correlated with native grapsid crab presence, however, no statistically significant relationship was found between densities at scales of site or quadrat. Abiotic factors have been identified as the primary drivers of Petrolisthes distribution patterns.

Item Details

Item Type:Refereed Article
Keywords:marine, introduced species, population density, biotic resistance, habitat preference
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Control of pests, diseases and exotic species in marine environments
UTAS Author:Gregory, LP (Mr Laim Gregory)
UTAS Author:Campbell, ML (Associate Professor Marnie Campbell)
UTAS Author:Primo, C (Dr Carmen Primo Perez)
UTAS Author:Hewitt, CL (Professor Chad Hewitt)
ID Code:81413
Year Published:2012
Web of Science® Times Cited:7
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2012-12-05
Last Modified:2017-10-31

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