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Abstract:

One of the hypotheses of growing interest in studies of responses to thermal environments suggests that trade-offs and other trait associations may be altered by temperature. Here, the commonly observed positive association between body size and longevity was examined at two adult test temperatures, 14°C and 25°C, in cold-stress-selected lines (S) and their controls (C) in 25°C-reared Drosophila melanogaster. Thorax length (TL) and developmental time (DT) were also scored in 25°C-reared individuals before and after one generation of truncation selection on longevity. The topography of the selection surface that relates longevity to thorax and wing size was temperature dependent and differed both between lines and between sexes. Longevity increased monotonically with body size (TL) in C and S females at 25°C but, surprisingly, longevity decreased with body size in S individuals at 14°C. Body size did not diverge between S and C lines and showed no response to longevity selection. However, DT increased by 25°C-longevity selection in C individuals and decreased by 14°C-longevity selection in S individuals. These results suggest that trait associations (including the commonly observed trade-off between body size and DT) can greatly depend on temperature, as a shift in the sign of the correlation is possible at low temperature. Genotype X temperature interaction is an important source of variation in the relationship between soma size and longevity.

Registro:

Documento: Artículo
Título:Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster
Autor:Norry, F.M.; Loeschcke, V.
Filiación:Department of Ecology and Genetics, University of Aarhus, Building 540, Ny Munkegade, DK-8000 Aarhus C, Denmark
Departamento de Ecología Genetica, y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina
Palabras clave:Body size; Cold-stress tolerance; Developmental time; Drosophila melanogaster; Longevity; Trade-offs; Trait associations; body size; longevity; temperature effect; trade-off; Animalia; Diptera; Diptera; Drosophila melanogaster; Drosophila melanogaster; Drosophilidae; Drosophilidae; Melanogaster
Año:2002
Volumen:56
Número:2
Página de inicio:299
Página de fin:306
DOI: http://dx.doi.org/10.1111/j.0014-3820.2002.tb01340.x
Título revista:Evolution
Título revista abreviado:Evolution
ISSN:00143820
CODEN:EVOLA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v56_n2_p299_Norry

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Citas:

---------- APA ----------
Norry, F.M. & Loeschcke, V. (2002) . Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster. Evolution, 56(2), 299-306.
http://dx.doi.org/10.1111/j.0014-3820.2002.tb01340.x
---------- CHICAGO ----------
Norry, F.M., Loeschcke, V. "Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster" . Evolution 56, no. 2 (2002) : 299-306.
http://dx.doi.org/10.1111/j.0014-3820.2002.tb01340.x
---------- MLA ----------
Norry, F.M., Loeschcke, V. "Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster" . Evolution, vol. 56, no. 2, 2002, pp. 299-306.
http://dx.doi.org/10.1111/j.0014-3820.2002.tb01340.x
---------- VANCOUVER ----------
Norry, F.M., Loeschcke, V. Temperature-induced shifts in associations of longevity with body size in Drosophila melanogaster. Evolution. 2002;56(2):299-306.
http://dx.doi.org/10.1111/j.0014-3820.2002.tb01340.x