Sex biases in dispersal and philopatry: Insights from a meta-analysis based on capture-mark-capture studies of damselflies

Article Abstract:

Return rates were reviewed for a model group of invertebrates (damselflies) to explore putative costs and benefits of dispersal by males and females. Published capture-mark-capture data was used to examine whether a sex bias existed in likelihood of recapture at least once, at both emergence and/or breeding sites. Meta-analysis showed a higher likelihood of recapture at least once for males than for females at both natal sites and breeding sites, which can be attributed to higher female-biased dispersal.

United States, Public affairs, Social aspects, Behavior, Damselflies

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Dispersal and mortality of prairie voles (Microtus ochrogaster) in fragmented landscapes: A field experiment

Article Abstract:

A field experiment that manipulated landscapes by mowing so that the amount of unfavorable habitat for prairie voles increased while the number and size of favorable patches remained constant is conducted. The relationships of increased distance between patches in a landscape to successful dispersal, to mortality and to overall abundance suggest that population dynamics within favorable patches may be affected by the relative amount of unfavorable habitat within a landscape.

Illinois, Mortality, Demographic aspects, Environmental aspects, Growth, Prairie vole, Company growth

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Species and sex biases in ectoparasitism of dragonflies by mites

Article Abstract:

A detailed investigation on the patterns of host use and successful parasitism of two dragonfly species by the ectoparasitic water mite, Limnochares Americana Lundblad is presented. Both species biases and sex biases in parasitism by mites have been found in the field surveys, which appear explained by differences in exposure.

Influence, Mites, Sexism, Dragonflies

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