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Highly nested diets in intrapopulation monkey-resource food webs.

Wesley Dáttilo1, Juan Carlos Serio-Silva, Colin A Chapman

  • 1Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico.

American Journal of Primatology
|February 6, 2014
PubMed
Summary
This summary is machine-generated.

Individual howler monkey diets form nested food webs, revealing non-random foraging and resource competition. Ficus trees are crucial to their feeding ecology, especially for selective eaters.

Keywords:
complex networksintrapopulation variationmodularitynestednesssocial animals

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Area of Science:

  • Primate Ecology
  • Behavioral Ecology
  • Food Web Dynamics

Background:

  • Ecological network studies offer insights into species interactions.
  • Understanding intrapopulation feeding variation is crucial for ecological dynamics.
  • Few studies have applied network analysis to individual diets within a population.

Purpose of the Study:

  • To analyze intrapopulation diet variation in howler monkeys (Alouatta palliata) using network analysis.
  • To investigate individual foraging strategies and resource competition.
  • To identify key food resources and their role in feeding ecology.

Main Methods:

  • Utilized 7 years of observational data.
  • Applied network analysis to individual monkey-resource food webs.
  • Compared observed diets to null models to assess foraging patterns.

Main Results:

  • Howler monkey food webs are nested, not modular, irrespective of season or time.
  • Individual foraging is non-random; selective eaters' diets are subsets of others'.
  • Group foraging strategies influence resource sharing; Ficus species are a primary food source.

Conclusions:

  • Individual foraging behavior is structured and non-random within howler monkey populations.
  • Dietary overlap and competition exist, with selective individuals potentially outcompeting others.
  • Ficus trees are vital to howler monkey feeding ecology due to consistent availability.