Artículo
Clinal variation in developmental time and viability, and the response to thermal treatments in two species of Drosophila
Folguera, Guillermo
; Ceballos, Santiago Guillermo
; Spezzi, Luciana; Fanara, Juan Jose
; Hasson, Esteban Ruben
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Fecha de publicación:
10/2008
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Biological Journal of The Linnean Society
ISSN:
0024-4066
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The present study first addressed the question of whether developmental time (DT) and viability (VT) vary clinally along latitudinal and altitudinal gradients in Drosophila buzzatii, an autochthonous specialist and the generalist invasive Drosophila melanogaster. Coincident and positive altitudinal clines across species and, direct and inverse latitudinal clines were observed for DT in D. melanogaster and D. buzzatii, respectively. Opposing latitudinal and altitudinal clines were detected for VT only in D. melanogaster. The patterns observed along altitudinal gradients prompted us to investigate whether flies living at lowland and highland environments may respond differentially to thermal treatments consisting of regimes of constant and alternating temperatures. Flies reared at higher mean temperature developed faster than at lower mean temperature in both species. By contrast, the response in VT differed greatly between species. Highland D. melanogaster were more viable than lowland regardless the treatment, whereas, in D. buzzatii, highland flies were more viable than lowland in alternating thermal regimes and the reverse was true in treatments of constant temperature. The results obtained suggest that thermal amplitude may be an important factor that should be considered in investigations of thermal adaptation.
Palabras clave:
THERMAL ADAPTATION
,
THERMAL AMPLITUDE-CLINES
Archivos asociados
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Identificadores
Colecciones
Articulos(CADIC)
Articulos de CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Articulos de CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Citación
Folguera, Guillermo; Ceballos, Santiago Guillermo; Spezzi, Luciana; Fanara, Juan Jose; Hasson, Esteban Ruben; Clinal variation in developmental time and viability, and the response to thermal treatments in two species of Drosophila; Wiley Blackwell Publishing, Inc; Biological Journal of The Linnean Society; 95; 2; 10-2008; 233-245
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