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Tolerance of nonindigenous cichlid fishes (Cichlasoma urophthalmus, Hemichromis letourneuxi) to low temperature: laboratory and field experiments in south Florida

Schofield, Pamela J ; Loftus, William F ; Kobza, Robert M ; Cook, Mark I ; Slone, Daniel H

Biological invasions, 2010-08, Vol.12 (8), p.2441-2457 [Periódico revisado por pares]

Dordrecht: Dordrecht : Springer Netherlands

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Título:
Tolerance of nonindigenous cichlid fishes (Cichlasoma urophthalmus, Hemichromis letourneuxi) to low temperature: laboratory and field experiments in south Florida
Autor: Schofield, Pamela J ; Loftus, William F ; Kobza, Robert M ; Cook, Mark I ; Slone, Daniel H
Assuntos: aquatic habitat ; Biomedical and Life Sciences ; canals (waterways) ; Cichlasoma urophthalmus ; Cichlidae ; Cold ; cold tolerance ; depth ; Developmental Biology ; ditches ; Ecology ; field experimentation ; Fish ; Freshwater ; Freshwater & Marine Ecology ; freshwater fish ; geographical distribution ; Habitats ; Hemichromis ; Hemichromis letourneuxi ; invasive species ; Life Sciences ; marshes ; morbidity ; mortality ; Nonnative species ; Original Paper ; Physiology ; Pisces ; Plant Sciences ; salinity ; spatial variation ; Water temperature
É parte de: Biological invasions, 2010-08, Vol.12 (8), p.2441-2457
Notas: http://dx.doi.org/10.1007/s10530-009-9654-6
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Descrição: The cold tolerance of two non-native cichlids (Hemichromis letourneuxi and Cichlasoma urophthalmus) that are established in south Florida was tested in the field and laboratory. In the laboratory, fishes were acclimated to two temperatures (24 and 28°C), and three salinities (0, 10, and 35 ppt). Two endpoints were identified: loss of equilibrium (11.5-13.7°C for C. urophthalmus; 10.8-12.5°C for H. letourneuxi), and death (9.5-11.1°C for C. urophthalmus; 9.1-13.3°C for H. letourneuxi). In the field, fishes were caged in several aquatic habitats during two winter cold snaps. Temperatures were lowest (4.0°C) in the shallow marsh, where no fish survived, and warmest in canals and solution-holes. Canals and ditches as shallow as 50 cm provided thermal refuges for these tropical fishes. Because of the effect on survival of different habitat types, simple predictions of ultimate geographic expansion by non-native fishes using latitude and thermal isoclines are insufficient for freshwater fishes.
Editor: Dordrecht: Dordrecht : Springer Netherlands
Idioma: Inglês

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Tolerance of nonindigenous cichlid fishes (Cichlasoma urophthalmus, Hemichromis letourneuxi) to low temperature: laboratory and field experiments in south Florida

Schofield, Pamela J ; Loftus, William F ; Kobza, Robert M ; Cook, Mark I ; Slone, Daniel H

Dordrecht: Dordrecht : Springer Netherlands

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