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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: 24 July 2021

Effects of Biotic Interactions on Spatial Behavior of Small Mammals in a Semiarid Community in North-Central Chile

Effects of Biotic Interactions on Spatial Behavior of Small Mammals in a Semiarid Community in North-Central Chile

Efectos De Las Interacciones BióTicas Sobre El Comportamiento Espacial De Pequeños MamíFeros En Una Comunidad SemiáRida En El Norte-Central De Chile

Chapter:
(p.140) (p.141) Effects of Biotic Interactions on Spatial Behavior of Small Mammals in a Semiarid Community in North-Central Chile
Source:
The Quintessential Naturalist
Author(s):

John A. Yunger

Peter L. Meserve

Julio R. Gutiérrez

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0006

This chapter examines the live-trap data of four small mammal species for evidence of behavioral responses to predator and/or competitor exclusions in a semiarid thorn scrub community in north-central Chile. It notes that the species include an herbivorous hystricognath rodent, Octodon degus, a granivorous/herbivorous sigmodontine rodent, Phyllotis darwini, and two omnivorous/insectivorous sigmodontines, Abrothrix olivaceus and Abrothrix longipilis. The chapter observes that significant numerical effects of predation on O. degus are present during the study; although none are detected on P. darwini, previous analyses showed significant but small magnitude effects of predation. It further observes that both species had significant effects of predation on survival. The chapter also examines effects of biotic interactions on mean distance between successive captures for consecutive six-month seasons over the course of a 36-month period during and following an El Niño event in 1991–1994.

Keywords:   behavioral responses, north-central Chile, herbivorous hystricognath, Octodon degus, granivorous/herbivorous sigmodontine, Phyllotis darwini, omnivorous/insectivorous sigmodontines, Abrothrix olivaceus, Abrothrix longipilis, El Niño event

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