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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 30 July 2021

Trophic Relationships within a Highland Rodent Assemblage from Manu National Park, Cusco, Peru

Trophic Relationships within a Highland Rodent Assemblage from Manu National Park, Cusco, Peru

Relaciones TróFicas Dentro De Un Ensamble De Roedores De Altura En E1 Parque Nacional Del Manu, Cusco, Perú

Chapter:
(p.225) Trophic Relationships within a Highland Rodent Assemblage from Manu National Park, Cusco, Peru
Source:
The Quintessential Naturalist
Author(s):

Sergio Solari

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0009

This chapter analyzes stomach rodents for five species of sigmodontine rodents from a highland assemblage from Manu National Park, Peru (3400–3500m), including Akodon subfuscus, A. torgues, Oxymycterus paramensis, Phyllotis osilae, and Oligoryzomys sp. It calculates indices of niche breadth and overlap, and assesses interspecific and intraspecific variation with analysis of variance. The chapter observes that consumption of arthropods (adults and larvae) is predominant in the akodontines, comprising 〉60% of their diet by volume. It further observes that Phyllotis osilae had the greatest niche breadth, whereas O. paramensis had the least and the lowest coefficient of variation (arthropod larvae, 18.1%). The chapter notes that niche overlap is higher between species of Akodon (0.98%), and lower between P. osilae and O. paramensis (0.25%). It concludes that the findings confirm that local patterns of resource use depend on resource availability, and that food is rarely a key factor for ecological segregation in these rodent assemblages.

Keywords:   sigmodontine rodents, Manu National Park, Peru, Akodon subfuscus, A. torgues, Oxymycterus paramensis, Phyllotis osilae, Oligoryzomys, niche breadth, ecological segregation

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