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dc.contributor.authorBlair, Jennifer Marie
dc.contributor.authorOstrovsky, Ilia
dc.contributor.authorHicks, Brendan J.
dc.contributor.authorPitkethley, Robert J.
dc.contributor.authorScholes, Paul
dc.contributor.authorTonn, William
dc.identifier.citationBlair, J. M., Ostrovsky, L, Hicks, B. J., Pitkethley, R. J. & Scholes, P. (2013). Growth of rainbow trout (Oncorhynchus mykiss) in warm-temperate lakes: implications for environmental change. Canadian Journal of Fisheries and Aquatic Sciences, 70(5), 815-823.en_NZ
dc.description.abstractTo predict potential effects of climate and anthropogenic impacts on fish growth, we compared growth rates of rainbow trout (Oncorhynchus mykiss) in nine closely located warm-temperate lakes of contrasting morphometry, stratification and mixing regime, and trophic state. Analyses of long-term mark–recapture data showed that in deep oligotrophic and mesotrophic lakes, trout growth rates increased with increasing indices of lake productivity. In contrast, in shallow eutrophic lakes, where fish habitat volume is constrained by temperature and dissolved oxygen, trout growth rates declined with increasing productivity. Growth rates were higher in lakes with greater volumes of favourable habitat (i.e., dissolved oxygen > 6.0 mg•Lˉ¹ and temperature < 21 °C) and lower in lakes with increased turbidity, chlorophyll a, and nitrogen concentrations. Our findings suggest that increases in lake productivity and temperatures as a result of global climatic change are likely to be more detrimental to salmonid habitat quality in shallower, productive lakes, while salmonids will better endure such changes in deeper, oligotrophic lakes. Fishery managers can use this information to aid future stocking decisions for salmonid fisheries in warm-temperate climates.en_NZ
dc.publisherCanadian Science Publishingen_NZ
dc.relation.ispartofCanadian Journal of Fisheries and Aquatic Sciences
dc.titleGrowth of rainbow trout (Oncorhynchus mykiss) in warm-temperate lakes: implications for environmental changeen_NZ
dc.typeJournal Articleen_NZ
dc.relation.isPartOfCanadian Journal of Fisheries and Aquatic Sciencesen_NZ

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