Risk Assessment Model Development for Establishment Success and Impact of Non-native Freshwater Fishes in the Wet Tropics Bioregion, Northern Queensland, Australia

Webb, Alan (2008) Risk Assessment Model Development for Establishment Success and Impact of Non-native Freshwater Fishes in the Wet Tropics Bioregion, Northern Queensland, Australia. Report. Australian Centre for Tropical Freshwater Research, Townsville, QLD, Australia.

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Abstract

[Extract] The study applied a risk assessment model for non-native freshwater fishes devised by Kolar and Lodge (2002) based upon previous invasion history to determine key species’ attributes that may predict future outcomes of introductions in northern Queensland fresh waters. Thirty-two non-native species have been reported from Queensland, with 15 species having established populations, while 22 species have been reported from tropical northern Queensland with 11 species having established populations. Available data on the status (establishment and impact), ecology, life history and previous invasion history were collected from the literature for all species reported from Queensland fresh waters. For species where information was not available and fish were locally available, physiological tolerance trials were conducted to obtain maximum and minimum temperature, maximum salinity and minimum dissolved oxygen tolerance data. A total of 17 continuous and categorical variables were used (5 environmental tolerances, 6 life history attributes, 2 habitat needs, 3 previous invasion history variables, 1 phylogenetic similarity variable) for model development. Univariate (ANOVA) and multivariate analyses (Discriminant Analysis[DA], Categorical Regression Tree Analysis [CART] were performed on data sets for non-native fishes reported from Queensland and separately for northern Queensland waters. Analyses were done for the establishment and impact stages as defined by Kolar and Lodge (2002), using either the complete set of variables or a smaller set of directly-measured continuous variables (temperature, salinity and hypoxia tolerances, egg diameter and body size).

Item ID: 28221
Item Type: Report (Report)
Keywords: tilapia; exotic species; fish; freshwater; Wet Tropics
Additional Information:

ACTFR Report No. 08/23

Funders: Marine and Tropical Science Research Facility (MTSRF)
Date Deposited: 29 Jul 2013 04:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 50%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050103 Invasive Species Ecology @ 50%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960499 Control of Pests, Diseases and Exotic Species not elsewhere classified @ 100%
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