‘Because female Collared Flycatchers only lay one clutch per season, the proportion of fertilizable females declines as the proportion of incubating females increase.’
‘These sexual differences are reflected in the operational sex ratio; the ratio of fertilizable females to sexually active males at the site and time when mating occurs.’
形容词 变体/同根词
‘Because female Collared Flycatchers only lay one clutch per season, the proportion of fertilizable females declines as the proportion of incubating females increase.’
