Ecological risk aversion and juvenile ring-tailed lemur feeding and foraging

Area of Science:

• Primate Ecology
• Behavioral Ecology
• Evolutionary Biology

Background:

• The extended juvenile period in primates is often linked to feeding ecology and social interactions.
• However, recent field data indicate variability in the relationship between foraging efficiency, group foraging, and social behavior in juvenile primates.

Purpose of the Study:

• To investigate the behavioral predictions regarding foraging patterns in gregarious strepsirrhines, specifically ring-tailed lemurs (Lemur catta).
• To test if foraging patterns in ring-tailed lemurs align with hypotheses suggesting sociality, rather than feeding limitations, influences extended juvenile periods.

Main Methods:

• A mixed longitudinal sample of feeding and foraging behavior observations was collected from ring-tailed lemurs.
• Data were gathered at the Bezà Mahafaly Special Reserve in Madagascar.

Main Results:

• Ring-tailed lemurs do not typically display close proximity during foraging, low feeding efficiency, or low dietary diversity.
• These findings contrast with predictions based on ecological trade-offs potentially limiting juvenile foraging success.

Conclusions:

• The absence of ecological trade-offs in ring-tailed lemurs suggests that sociality and social complexity play a more significant role in extending the primate juvenile period.
• This challenges the traditional view that feeding ecology is the primary driver for prolonged juvenile development in primates.