466 papers
Despite a stable genetic XX/XY sex determination system and unbiased sex ratios in early life stages, Scandinavian populations of the two-spotted goby exhibit a consistent female-biased adult sex ratio across a climatic gradient, a pattern the authors attribute to sex-specific habitat distribution rather than environmental sex determination or differential mortality.
This study on wild vervet monkeys reveals that male-female grooming exchanges evolve toward reciprocity over six months through a dynamic where females employ an "all-in" strategy of high initial investment that gradually decreases, while males follow a "raise-the-stakes" approach, ultimately demonstrating that cooperative strategies are shaped by complex life history parameters rather than simple theoretical models.
Despite extensive ecological overlap and weak habitat isolation, strong sexual isolation driven by divergent male song and chemical cues effectively maintains species boundaries between the sympatric Hawaiian crickets *Laupala kona* and *Laupala hualalai*.
This study analyzes sex-biased gene expression across six *Drosophila* species over 50 million years, revealing that while body tissues show conserved sex bias, head tissues exhibit rapid turnover driven largely by concordant regulatory changes in both sexes rather than sexual antagonism, with evidence of positive selection acting on these expression differences.
This theoretical study demonstrates that autotetraploid establishment in gametophytic self-incompatible populations is feasible through the evolution of self-compatibility, provided that selfing rates are sufficiently high to overcome minority cytotype exclusion, particularly under conditions of severe pollen limitation.
This study utilizes single-cell transcriptomics to construct and compare cell atlases of the *Clytia hemisphaerica* planula and medusa, revealing that while both life stages share broad cell categories, the planula exhibits reduced diversity and possesses unique specialized cell types that reflect stage-specific functions and distinct developmental fates along the oral-aboral axis.