info:eu-repo/semantics/article
Mating success depends on rearing substrate in cactophilic Drosophila
Fecha
2012-05Registro en:
Hurtado, Juan Pablo; Soto, Eduardo Maria; Orellana, Liliana; Hasson, Esteban Ruben; Mating success depends on rearing substrate in cactophilic Drosophila; Springer; Evolutionary Ecology; 26; 3; 5-2012; 733-743
0269-7653
CONICET Digital
CONICET
Autor
Hurtado, Juan Pablo
Soto, Eduardo Maria
Orellana, Liliana
Hasson, Esteban Ruben
Resumen
Drosophila buzzatii and D. koepferae coexist in the arid lands of southern South America and exploit different types of cactus as breeding hosts. The former prefers to lay eggs on the rotting pads of prickly pears (genus Opuntia) whereas D. koepferae exhibits greater acceptance for columnar cacti (e. g., Echinopsis terschekii). Here, we demonstrate that the rearing cacti affect male mating success, flies reared in each species' preferred host exhibited enhanced mating success than those raised in secondary hosts. Opuntia sulphurea medium endows D. buzzatii males with greater mating ability while D. koepferae males perform better when flies develop in Echinopsis terschekii. These effects are not mediated through body size, even in D. buzzatii whose body size happens to be affected by the rearing cacti. This scenario, which is consistent with the evolution of host specialization and speciation through sensory drive, emphasizes the importance of habitat isolation in the coexistence of these cactophilic Drosophila.