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Population structure and life history characteristics of euastacus bispinosus and cherax destructor (Parastacidae) in the Grampians National Park, Australia

Johnston, Kerrylyn, Robson, Belinda J. and Austin, Christopher M. 2008, Population structure and life history characteristics of euastacus bispinosus and cherax destructor (Parastacidae) in the Grampians National Park, Australia, Freshwater crayfish : a journal of astacology, vol. 16, pp. 165-173.

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Title Population structure and life history characteristics of euastacus bispinosus and cherax destructor (Parastacidae) in the Grampians National Park, Australia
Formatted title Population Structure and Life History Characteristics of Euastacus bispinosus and Cherax destructor (Parastacidae) in the Grampians National Park, Australia
Author(s) Johnston, Kerrylyn
Robson, Belinda J.
Austin, Christopher M.ORCID iD for Austin, Christopher M. orcid.org/0000-0003-1848-6267
Journal name Freshwater crayfish : a journal of astacology
Volume number 16
Start page 165
End page 173
Publisher International Association of Astacology
Place of publication Auburn, AL
Publication date 2008
Keyword(s) Cherax destructor
Euastacus bispinosus
life history
population structure
reproductive timing
sex ratios
Summary Despite being the most widely distributed and cultured freshwater crayfish species in Australia, relatively little is known about the ecology of Cherax destructor outside of captivity. Similarly, few ecological studies have been conducted on the large and threatened stream dwelling Australian freshwater crayfish Euastacus bispinosus. A series of seasonal sampling surveys over two years investigated the population structure, life history and reproductive timing of C. destructor in fire dam habitats, and of E. bispinosus in channel (stream) habitats, in the Grampians National Park in south-west Victoria, Australia. Cherax destructor individuals in the largest size class (50 – 59.95 mm OCL) were not abundant during the study, while those belonging to the 0 – 9.95 mm OCL size class were more frequent in summer than at other times of year, suggesting synchronous recruitment in fire dam habitats. Individuals in the reproductively active mid-size classes were also frequent in summer. For E. bispinosus, sex ratios in spring always favoured females, although there were no clear trends for other times of year. Gravid E. bispinosus females were found in winter and spring throughout the study, and were sexually mature at a smaller size than has previously been reported.
Language eng
Field of Research 060207 Population Ecology
Socio Economic Objective 960807 Fresh, Ground and Surface Water Flora, Fauna and Biodiversity
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, International Association of Astacology
Persistent URL http://hdl.handle.net/10536/DRO/DU:30028481

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Created: Fri, 30 Apr 2010, 14:27:22 EST by Teresa Treffry

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