Abstract
Se estudió poblaciones naturales de la mosca frutera Anastrepha striata Schiner, en dos lugares de Costa Rica. Los hongos Laboulbeniales se transmiten en éstas durante la cópula. Hembras y machos con hongos en las patas y/o parte ventral del tórax (machos), y en ambos lados del noto y/o base dorsal del abdomen (hembras), teRÍan alas significativamente más largas que los individuos no parasitados. Esto sugiere que los individuos más grandes logran más apareamientos.
Highlights
Sexual selection as an important evolu tionary force, first proposed by Darwin (1871), has attracted increased attention during tbe last two decades (Tbornhill & Alcock 1983, Gwynne & Morris· 1983, Bradbury and Andersson 1987, Fincke 1997)
Previous studies by tbe senior autbor in Costa Rica and Guatemala (Hedstrom 1994 ) have shown tbat fruit flies of tbe species Anastrepha striata Schiner are frequently infected by laboulbenial fungi of tbe genus Stigmatomyces; and it has been estab lished tbat transmission occurs during copula tion (Fig. 1), either completed or attempted
We asked the following question: Is the infection more prevalent in certain size classes of (1) males and (2) females compared to other size classes? If so, is this evidence of preference for larger mates in guaya fruit fiies?
Summary
Sexual selection as an important evolu tionary force, first proposed by Darwin (1871), has attracted increased attention during tbe last two decades (Tbornhill & Alcock 1983, Gwynne & Morris· 1983, Bradbury and Andersson 1987, Fincke 1997). . Previous studies by tbe senior autbor in Costa Rica and Guatemala (Hedstrom 1994 ) have shown tbat fruit flies of tbe species Anastrepha striata Schiner are frequently infected by laboulbenial fungi of tbe genus Stigmatomyces; and it has been estab lished tbat transmission occurs during copula tion (Fig. 1), either completed or attempted. Hendrichs (1986) found tbat large laboratory-reared A. suspensa males were more successful in competing for and mating with females.
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