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Environmental Biology of Fishes

, Volume 7, Issue 2, pp 149–156 | Cite as

Lower lethal temperatures for fourteen non-native fishes in Florida

  • Paul L. Shafland
  • James M. Pestrak
Article

Synopsis

The most important factor affecting the potential range of 14 non-native fishes in Florida appears to be their lack of tolerance to low temperatures. In this study, temperatures associated with reduction in feeding, cessation of feeding, loss of equilibrium and death were identified by decreasing water temperature 1°C day−1. Fishes tested and their mean lower lethal temperatures were: Astronotus ocellatus (12.9°C), Belonesox belizanus (9.7°C), Cichlasoma bimaculatum (8.9°C), C. cyanoguttatum (5.0°C), C. meeki (10.3°C), C. octofasciatum (8.0°C), C. trimaculatum (10.9°C), Clarias batrachus (9.8°C), Hemichromis bimaculatus (9.5°C), Hypostomus sp. (11.2°C), Tilapia aurea (6.2°C), T. mariae (11.2°C), T. melanotheron (10.3°C) and T. mossambica (9.5°C). These data indicate that temperature is less limiting for these fishes in Florida than was previously recognized.

Keywords

Limiting factors Range Exotic fish Introductions Impact Cichlidae Tilapia (Sarotherodon) Cichlasoma Astronotus Hemicromis Clarias Hypostomus Belonesox Temperature tolerance 

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Copyright information

© Dr W. Junk Publishers 1982

Authors and Affiliations

  • Paul L. Shafland
    • 1
  • James M. Pestrak
    • 1
  1. 1.Non-Native Fish Research Laboratory, Florida Game and Fresh Water Fish CommissionBoca RatonUSA

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