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These findings challenge the prevailing notion of male driven mating rates in simultaneous hermaphrodites and call for complementary investigations of mating rate effects on fitness through the male sexual function.There is increasing awareness that ecological processes such as changes in population demography can substantially affect the evolution of mating systems (reviewed in [1]).

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Similarly, the freshwater snail Lymnaea stagnalis was found to receive more inseminations when kept in groups of eight compared to groups of four or pairs [20].We use cookies to make interactions with our website easy and meaningful, to better understand the use of our services, and to tailor advertising.For further information, including about cookie settings, please read our Cookie Policy .Despite this, the average mating rate per individual and day remained constant across all treatments (mean ± SD: 3.44 ± 1.56; range: 0.57 - 8.86) (Table 1; Figure 1b).Our analysis indicated a statistically weak trend for mating rate to increase with density (P = 0.1, Table 1; upper 95% bound for the corresponding linear regression slope equals 0.5 matings per day, corresponding to a 15% increase at maximum in average mating rate across a 300% increase in density).

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