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, Pablo Daniel, Norry, Fabian Marcelo
Publicado:	2005
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15220613_v7_n6_p915_Sambucetti 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

id	paper:paper_15220613_v7_n6_p915_Sambucetti
record_format	dspace
spelling	paper:paper_15220613_v7_n6_p915_Sambucetti2023-06-08T16:19:20Z Variation in senescence and associated traits between sympatric cactophilic sibling species of Drosophila Sambucetti, Pablo Daniel Norry, Fabian Marcelo 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. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15220613_v7_n6_p915_Sambucetti 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, Pablo Daniel Norry, Fabian Marcelo 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.
author	Sambucetti, Pablo Daniel Norry, Fabian Marcelo
author_facet	Sambucetti, Pablo Daniel Norry, Fabian Marcelo
author_sort	Sambucetti, Pablo Daniel
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
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15220613_v7_n6_p915_Sambucetti http://hdl.handle.net/20.500.12110/paper_15220613_v7_n6_p915_Sambucetti
work_keys_str_mv	AT sambucettipablodaniel variationinsenescenceandassociatedtraitsbetweensympatriccactophilicsiblingspeciesofdrosophila AT norryfabianmarcelo variationinsenescenceandassociatedtraitsbetweensympatriccactophilicsiblingspeciesofdrosophila
_version_	1768545617196351488

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

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