Mating time of the West Indian fruit fly Anastrepha obliqua (Macquart) (Diptera: Tephritidae) under laboratory conditions

Abstract

Horário de Cópulas de Anastrepha obliqua (Macquart) (Diptera: Tephritidae) em Condições de Laboratório RESUMO -O isolamento reprodutivo alocrônico parece ser um fator importante nos processos de especiação em Tephritidae, uma vez que a existência de horários de cópula específicos é uma característica comum de suas espécies. O horário de cópula de Anastrepha obliqua (Macquart) foi investigado usando observações segundo metodologia grupo-focal, durante dez dias, em condições de laboratório. O número de casais em cópula e de machos apresentando comportamento de chamado variou significativamente em relação ao horário do dia. As atividades sexuais mostraram-se concentradas no período vespertino, sendo que a chamada dos machos alcançou um pico entre 15:30h e 16:30h e as cópulas ocorreram mais freqüentemente entre as 14:00h e 16:30h. PALAVRAS-CHAVE: Isolamento alocrônico, especiação, comportamento sexualABSTRACT -Allochronic reproductive isolation seems to be an important factor in speciation processes in Tephritidae since specific mating times are a widespread feature of its species. The timing of matings of the West Indian fruit fly, Anastrepha obliqua (Macquart) was investigated through groupfocal observations, during ten days, under laboratory conditions. The number of observed matings and males exhibiting calling behavior varied significantly according to time of day. Sexual activities seemed to be concentrated in the afternoon period, with the male calling behavior reaching a peak between 3:30p.m. and 4:30p.m., and mating occurred most frequently from 2:00p.m. to 4:30p.m.

Head Transcriptomes of Two Closely Related Species of Fruit Flies of theAnastrepha fraterculusGroup Reveals Divergent Genes in Species with Extensive Gene Flow

“…Some species in the fraterculus species group are closely related, and show limited genetic and morphologic differentiation ( Smith-Caldas et al 2001 ; Araujo 1997 ; Zucchi 2000a ), in part because they have diverged recently. Furthermore, there is evidence that these species are able to successfully mate in the lab ( Henning and Matioli 2006 ; Abraham et al 2011 ; Aluja et al 1999 ), and even that they differentiated with introgression (F. Diaz, A. L. A. Lima, A. M. Nakamura, F. Fernandes, I. Sobrinho, and R. A. de Brito, unpublished results). Hence, it was not surprising that we failed to identify categories of genes that differ between A. obliqua and A. fraterculus .…”

“…Though somewhat generalists, A. obliqua has been more associated with fruits from Anacardiaceae trees, whereas A. fraterculus is more commonly found in Myrtaceae ( Norrbom et al 1999 ), which suggests that they could be attracted to different odors from these fruits. These species also show differences in mating time and other reproductive activities ( Henning and Matioli 2006 ; Aluja et al 1999 ).…”

Genetic structure and diversity in Brazilian populations of Anastrepha obliqua (Diptera: Tephritidae)

“…obliqua matings took place in the early morning [12], contrasting with a study showing that A . obliqua populations in Brazil mated in the afternoon [13]. Additionally, morphometric studies have also detected divergence between populations of A .…”

The clock gene cryptochrome of Bactrocera cucurbitae (Diptera: Tephritidae) in strains with different mating times

“…For example, there is a specific time of mating in two sibling species of Australian native tephritid fruit flies, Bactrocera tryoni and Bactrocera neohumeralis (Lewontin and Birch, 1966;An et al, 2002An et al, , 2004. Mating time may also be a reproductive barrier among three sympatric Anastrepha tephritid fly species in South America (Malavasi et al, 1983;Henning and Matioli, 2006).…”