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Extinct habitat, extant species: lessons learned from conservation recovery actions for the Pedder galaxias (Galaxias pedderensis) in south-west Tasmania, Australia

Chilcott, Stuart, Freeman, Rob, Davies, Peter E., Crook, David A., Fulton, Wayne, Hamr, Premck, Jarvis, David and Sanger, Andrew C. (2013). Extinct habitat, extant species: lessons learned from conservation recovery actions for the Pedder galaxias (Galaxias pedderensis) in south-west Tasmania, Australia. Marine & Freshwater Research,64(9):864-873.

Document type: Journal Article

IRMA ID 82057923xPUB486
Title Extinct habitat, extant species: lessons learned from conservation recovery actions for the Pedder galaxias (Galaxias pedderensis) in south-west Tasmania, Australia
Author Chilcott, Stuart
Freeman, Rob
Davies, Peter E.
Crook, David A.
Fulton, Wayne
Hamr, Premck
Jarvis, David
Sanger, Andrew C.
Journal Name Marine & Freshwater Research
Publication Date 2013
Volume Number 64
Issue Number 9
ISSN 1323-1650   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84883677417
Start Page 864
End Page 873
Total Pages 10
Place of Publication Collingwood, Australia
Publisher C S I R O Publishing
HERDC Category C1 - Journal Article (DIISR)
Abstract The Pedder galaxias (Galaxias pedderensis) from Lake Pedder, Tasmania, Australia, is one of the world’s most threatened freshwater fish. The flooding of Lake Pedder in 1972 for hydroelectric power generation caused a major change to the ecosystem that initiated an irreversible decline in the Pedder galaxias within its natural range. The flooding inundated another headwater catchment and native and introduced fish from this catchment colonised the impoundment. Numbers of the Pedder galaxias declined markedly as the impoundment matured and as colonising fish proliferated. Surveys in the 1980s confirmed the parlous state of the population, highlighting the need for conservation intervention. Several urgent conservation actions were undertaken to save the species from extinction. Translocation was considered the most important recovery action, given the critically low numbers in the wild. The species is now extinct from its natural range and is known from only two translocated populations. The conservation program, and specifically the translocation recovery action, saved the Pedder galaxias from extinction. The conservation management was extremely challenging since rapidly declining fish numbers needed timely and critical decisions to underpin the future of the fish. Recommendations are provided arising from this case study to guide conservation of freshwater fish in similar circumstances.
Keywords critically threatened
galaxias conservation
Galaxiidae
habitat alteration
recovery plan
threatened freshwater fish
translocation
DOI http://dx.doi.org/10.1071/MF12257   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Thu, 07 Aug 2014, 17:02:01 CST