Data/hora: 06/06/2024 12:56:52

Provedor de dados: 	104	
País: 	Brazil	
Título: 	Critical thermal maxima and minima of the platyfish Xiphophorus maculatus Günther (Poecillidae, Cyprinodontiformes): a tropical species of ornamental freshwater fish	
Autores: 	Prodocimo,Viviane; Freire,Carolina Arruda.	
Data: 	2001-07-01	
Ano: 	2001	
Palavras-chave: 	Xiphophorus maculatus; Temperature; Critical thermal maxima and minima; Acclimation; Platyfish.	
Resumo: 	Temperature as an environmental factor has been a frequent subject of study, since it affects either directly or indirectly all living organisms. The determination of thermal limits (critical thermal minima - CTmin and maxima - CTmax) for the tropical ornamental freshwater teleost Xiphophorus maculatus Günther, 1866 (platyfish) was performed after their acclimation to the following temperatures: 15, 20, 25, and 30ºC, for seven days. After this period, the water temperature was elevated or reduced at a rate of 0.125ºC/min until CTmax and CTmin could be determined as the temperature at which 50% of the animals had lost equilibrium. Mean values for CTmax and CTmin for the acclimation temperatures of 15, 20, 25, and 30ºC were respectively: 39.8,39.8,40.4,41.5ºC (CTmax), and 9.6, 12.8, 13.1, 16.0ºC (CTmin). CTmax and CTmin for X. maculatus were thus affected by acclimation temperature. This tropical species is more heat- than cold- tolerant and would not resist the typical low winter temperatures of southern Brazil. Platyfish can adapt to natural environments in regions of mean annual temperatures around 20-25ºC or be kept in aquaria with other ornamental species that accordingly prefer this temperature range.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500007	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S0101-81752001000500007	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zoologia  v.18 suppl.1 2001	
Fonte: 	info:eu-repo/semantics/openAccess