Monday, 15 November 2004 - 2:48 PM
0048

Examining the relationship between time spent calling and mating success in the field cricket, Teleogryllus oceanicus

Sean Walker, swalker@fullerton.edu, California State University Fullerton, Biological Science, 900 N. State College Blvd, Fullerton, CA

Traditionally explanations of alternative reproductive tactics or strategies focus on frequency and condition dependent effects that occur within a single sex. However, the behavior of the opposite sex, especially if they choose mates, can clearly influence the outcome of competition between individuals exhibiting different tactics or strategies. One result of this could be that the choosy sex prefers to mate with males that exhibit a specific strategy or tactic. In crickets, males vary the time they spend calling and some males do not call while other males call quite a bit. Frequency, density, and condition dependence have been implicated as factors maintaining variation in male cricket calling behavior but it is unclear if the time that a male spends calling is related to his likelihood of mating. Here I evaluated how the calling behavior of male Teleogryllus oceanicus was related to the outcome (Mate or Not-Mate) of an interaction with a female. Male calling behavior was repeatable and was non-linearly related to age. In addition, the time a male spent calling was non-linearly related to mating success. In particular, males that called a lot and males that did not call very much were less likely to mate. Contrary to the assumptions of theoretical models, these data suggest that all males are not equal and their reproductive behavior may reflect this.


Species 1: ORTHOPTERA GRYLLIDAE TELEOGRYLLUS OCEANICUS (oceanic field cricket)
Keywords: alternative strategy, sexual selection

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