Matures — Sex

Differences in maturity age can lead to skewed sex ratios on spawning grounds; if one sex matures later, fewer individuals survive the return migration. 4. Human Development and Invariance

: Environmental factors like prey availability, water temperature, and energy allocation are primary drivers of when an individual matures. sex matures

: Individuals mature first as females and later transition to males. Differences in maturity age can lead to skewed

Males may mature earlier (approx. 5–6 years) compared to females (approx. 7–8 years). : Individuals mature first as females and later

: While biological maturation differs, studies on cognitive abilities often show "invariance," meaning the underlying structure of mental abilities matures similarly across both sexes.

: In some sex-changing species, a subset of the population may skip the "first" sex phase entirely and mature directly into the "second" sex (e.g., "pure males" in protogynous species). 3. Case Studies in Wildlife

: In many species, intense competition for mates can lead to delayed maturation in the sex facing higher selection pressure. For example, in some bird populations, males mature later than females to reach a size or social status necessary for successful competition.