Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila

Main hypothesis: Longevity and early fecundity are negatively correlated both within and between sympatric but ecologically divergent sibling species that differ in life span, as predicted by evolutionary theories of ageing. Organism: Drosophila koepferae, which mainly breeds on the patchily distrib...

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Autores principales: Sambucetti, P., Sørensen, J.G., Loeschcke, V., Norry, F.M.
Formato: JOUR
Materias:
Age-specific senescence rate
Body size
Drosophila
Early fecundity
Genotype x temperature interaction
Heat-stress resistance
Hsp70 expression
Cactaceae
Drosophila buzzatii
Drosophila koepferae
Opuntia
Opuntia cacti
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15220613_v7_n6_p915_Sambucetti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_15220613_v7_n6_p915_Sambucetti2023-10-03T16:20:42Z Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila Sambucetti, P. Sørensen, J.G. Loeschcke, V. Norry, F.M. Age-specific senescence rate Body size Drosophila Early fecundity Genotype x temperature interaction Heat-stress resistance Hsp70 expression Cactaceae Drosophila buzzatii Drosophila koepferae Opuntia Opuntia cacti Main hypothesis: Longevity and early fecundity are negatively correlated both within and between sympatric but ecologically divergent sibling species that differ in life span, as predicted by evolutionary theories of ageing. Organism: Drosophila koepferae, which mainly breeds on the patchily distributed Trychocereus cacti, and D. buzzatii, which mainly occurs on the more abundant and uniformly distributed Opuntia cacti. Methods: Flies were reared under standardized conditions from three sympatric populations. Longevity and mortality rate were studied both at 25°C and 29.5°C. Age-specific fecundity was estimated at 25°C. Other plausibly associated traits were also studied, including heat-shock resistance, Hsp70 expression and body size. Conclusions: Senescence rate was much faster in D. koepferae than in D. buzzatii in all populations at 25°C but not at 29.5°C. The interspecific difference in longevity at 25°C shifted in sign in one of the populations at 29.5°C. Neither the resistance to a heat shock nor the heat-induced Hsp70 expression showed significant interspecific variation. Body size was larger in D. koepferae than in D. buzzatii. Drosophila koepferae showed a massive reproductive output at early ages compared with D. buzzatii. Longevity and early fecundity at the non-stressful temperature (25°C) were negatively correlated both within and between species. Genotype x temperature interactions can in turn affect interspecific variation in evolutionary trajectories of both mean longevity and demographic rate of senescence. © 2005 Fabian M. Norry. Fil:Sambucetti, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Norry, F.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15220613_v7_n6_p915_Sambucetti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Age-specific senescence rate
Body size
Drosophila
Early fecundity
Genotype x temperature interaction
Heat-stress resistance
Hsp70 expression
Cactaceae
Drosophila buzzatii
Drosophila koepferae
Opuntia
Opuntia cacti
spellingShingle Age-specific senescence rate
Body size
Drosophila
Early fecundity
Genotype x temperature interaction
Heat-stress resistance
Hsp70 expression
Cactaceae
Drosophila buzzatii
Drosophila koepferae
Opuntia
Opuntia cacti
Sambucetti, P.
Sørensen, J.G.
Loeschcke, V.
Norry, F.M.
Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
topic_facet Age-specific senescence rate
Body size
Drosophila
Early fecundity
Genotype x temperature interaction
Heat-stress resistance
Hsp70 expression
Cactaceae
Drosophila buzzatii
Drosophila koepferae
Opuntia
Opuntia cacti
description Main hypothesis: Longevity and early fecundity are negatively correlated both within and between sympatric but ecologically divergent sibling species that differ in life span, as predicted by evolutionary theories of ageing. Organism: Drosophila koepferae, which mainly breeds on the patchily distributed Trychocereus cacti, and D. buzzatii, which mainly occurs on the more abundant and uniformly distributed Opuntia cacti. Methods: Flies were reared under standardized conditions from three sympatric populations. Longevity and mortality rate were studied both at 25°C and 29.5°C. Age-specific fecundity was estimated at 25°C. Other plausibly associated traits were also studied, including heat-shock resistance, Hsp70 expression and body size. Conclusions: Senescence rate was much faster in D. koepferae than in D. buzzatii in all populations at 25°C but not at 29.5°C. The interspecific difference in longevity at 25°C shifted in sign in one of the populations at 29.5°C. Neither the resistance to a heat shock nor the heat-induced Hsp70 expression showed significant interspecific variation. Body size was larger in D. koepferae than in D. buzzatii. Drosophila koepferae showed a massive reproductive output at early ages compared with D. buzzatii. Longevity and early fecundity at the non-stressful temperature (25°C) were negatively correlated both within and between species. Genotype x temperature interactions can in turn affect interspecific variation in evolutionary trajectories of both mean longevity and demographic rate of senescence. © 2005 Fabian M. Norry.
format JOUR
author Sambucetti, P.
Sørensen, J.G.
Loeschcke, V.
Norry, F.M.
author_facet Sambucetti, P.
Sørensen, J.G.
Loeschcke, V.
Norry, F.M.
author_sort Sambucetti, P.
title Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
title_short Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
title_full Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
title_fullStr Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
title_full_unstemmed Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila
title_sort variation in senescence and associated traits between sympatric cactophilic sibling species of drosophila
url http://hdl.handle.net/20.500.12110/paper_15220613_v7_n6_p915_Sambucetti
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AT loeschckev variationinsenescenceandassociatedtraitsbetweensympatriccactophilicsiblingspeciesofdrosophila
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