Michelle de Fraipont's research while affiliated with Laval University and other places

Publications (3)

Article
In addition to courting females, male threespine sticklebacks must guard their nests from attacks on the eggs by female cannibals. We hypothesized that the presence of females in high densities in tide pools adversely affects a male's health and reproductive success. In the laboratory males housed with conspecific females during the breeding season...
Article
Cost of reproduction theory suggests that iteroparous animals should "trade-off" present and future reproduction. However, animals living in highly variable environments may have been programmed to invest maximally in their initial brood because of uncertain future reproductive opportunities. Male three-spined sticklebacks (Gasterosteus aculeatus)...
Article
Three-spined sticklebacks have two main reproductive tactics. The 'normal' tactic is to establish a territory, build a nest, and court females. When eggs are obtained the males aerate them and defend them against predators. Some males attempt to steal fertilizations from the territorial male during courtship, leaving him to care for eggs he did not...

Citations

... Park & Lee (1999) reported that P. kaibarae with a longer TL could occupy territories more easily than smaller ones. In G. aculeatus, similar results have been reported: fish that are larger, older, and have a brighter nuptial color are dominant in reproductive behavior and occupying their territories (Fraipont et al., 1993;FitzGerald, 1993). Moreover, P. kaibarae show a hetero-sexual territorial system; both males and females build nests in their territories during the reproductive period (Morris, 1958;Park & Lee, 1999). ...
... Cost of reproduction for males may be especially high for fishes where males provide all the parental care and exhibit all the territorial defense (van den Assem, 1967;Fitzgerald et al., 1989;De-Fraipont et al, 1992;Baker, 1994). This can result in higher levels of stress and reduced immunocompetence in males relative to females (Herbert and Cohen, 1993). ...