The geographic mosaic of sex and infection in lake populations of a New Zealand snail at multiple spatial scales.

摘要: AbstractUnderstanding how sexual and asexual forms of the same species coexist is a challenge for evolutionary biology. The Red Queen hypothesis predicts that sex favored by parasite-mediated selection against common genotypes, leading to coexistence hosts. In geographic mosaic, where risk infection varies in space, theory also reproduction would be positively correlated with disease prevalence. We tested this lake populations New Zealand freshwater snail, Potamopyrgus antipodarum, comparing pairwise difference matrices frequency male using partial Mantel tests. conducted test at three spatial scales: among lakes on South Island, depths within an intensively sampled (Lake Alexandrina), Lake Alexandrina. found proportion snails were significantly correlat...