3 ms·
> In birds, the variance for body size is larger in females. Do you have a reference for this? I would be surprised, as I thought the explanation for variance
by iguy 8y ago
> In birds, the variance for body size is larger in females.
Do you have a reference for this? I would be surprised, as I thought the explanation for variance was not about chromosomes, but about investment... but I don't actually know if that's true, and birds (WW/WZ as you say) or reptiles (temperature) would be interesting examples.
- pygy_ 8y agoI do! https://onlinelibrary.wiley.com/doi/epdf/10.1111/evo.12224 https://onlinelibrary.wiley.com/doi/epdf/10.1111/evo.12224 This is observed not only in birds vs mammals but also in insects (some have heterogametic males like mammals and others (butterflies) have heterogamic females, like birds). Key figure: https://i.imgur.com/4E6FUXN.png https://i.imgur.com/4E6FUXN.png
- iguy 8y agoThanks! That's very interesting, I will think some more. Is the fact that male song-birds, err, spend much more on fashion & makeup... also a pattern that correlates with heterogameticness?