Preference, tolerance and resistance responses of poecilia sphenops valenciennes, 1846 pisces: poeciliidae to thermal fluctuations Reportar como inadecuado




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L. Fernando Bückle-Ramirez ;Latin American Journal of Aquatic Research 2010, 38 3

Autor: Mónica Hernández-Rodríguez

Fuente: http://www.redalyc.org/


Introducción



Latin American Journal of Aquatic Research E-ISSN: 0718-560X lajar@ucv.cl Pontificia Universidad Católica de Valparaíso Chile Hernández-Rodríguez, Mónica; Bückle-Ramirez, L.
Fernando Preference, tolerance and resistance responses of Poecilia sphenops Valenciennes, 1846 (Pisces: Poeciliidae) to thermal fluctuations Latin American Journal of Aquatic Research, vol.
38, núm.
3, noviembre, 2010, pp.
427-437 Pontificia Universidad Católica de Valparaíso Valparaiso, Chile Available in: http:--www.redalyc.org-articulo.oa?id=175015282007 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Lat.
Am.
J.
Aquat.
Res., 38(3): 427-437, 2010 Thermal tolerance and resistance of Poecilia sphenops DOI: 10.3856-vol38-issue3-fulltext-7 427 Research Article Preference, tolerance and resistance responses of Poecilia sphenops Valenciennes, 1846 (Pisces: Poeciliidae) to thermal fluctuations 1 Mónica Hernández-Rodríguez1 & L.
Fernando Bückle-Ramirez1 Centro de Investigación Científica y Educación Superior de Ensenada (CICESE) Carretera Ensenada-Tijuana 3918, Baja California, México ABSTRACT.
Poecilia sphenops was acclimated to two thermal fluctuations, each following a symmetrical and asymmetrical cycle.
The critical maximum temperatures of the fish were significantly different (P ≤ 0.001) between the thermal fluctuations: 40°C for the 20-29ºC thermal cycle and exceeding 42°C for the 2635ºC cycle.
Fish acclimated to the 20-29ºC thermal cycle were more resistant to cold, with a critical thermal minimum of 10ºC, unlike specimens of the 26-35ºC regime, with a critical minimum of 11.7°C.
In both cycles, the upper incipient lethal temperature interval was 38.8 to 39.5ºC and the lower incipient lethal temperature interval was 10.8 t...





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