Disentangling the effects of habitat, food, and intraspecific competition on resource selection by the spiny rat, Thrichomys fosteri

Pmela C. Antunes, Luiz Gustavo R. Oliveira-Santos, Walfrido M. Tomas, James D. Forester, Fernando A.S. Fernandez

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Animals make directional movements toward resources to satisfy nutritional, reproductive, and protection needs. We evaluated resource selection by the spiny rat (Thrichomys fosteri) in a heterogeneous habitat, disentangling the relative importance of habitat structure, escape cover, food availability, and intraspecific competition. The last 2 variables were estimated directly by explicitly incorporating their spatiotemporal variation in the model. We radiotracked 15 males and 5 females for a median of 10 days per month for 17 months. Used and available resources were estimated at the home-range scale by intersecting the radiotracking locations (used) and random points (available) with resource maps that were either temporally static (measured only once; palm density and bromeliad cover) or dynamic (with temporal variation; arthropod biomass and conspecific abundance). We performed a resource selection function analysis using conditional logistic regression stratified by each individual location. Within their home ranges, spiny rats selected areas with high bromeliad cover and arthropod biomass. There was a negative interaction between conspecific abundance and arthropod biomass. We showed that resource selection by individuals takes into account multiple resources that vary in space and time. Individuals tended to select areas with high escape cover and high food availability balanced by low intraspecific competition.

Original languageEnglish (US)
Pages (from-to)1738-1744
Number of pages7
JournalJournal of Mammalogy
Volume97
Issue number6
DOIs
StatePublished - Jan 1 2016

Fingerprint

resource selection
Arthropods
intraspecific competition
Homing Behavior
Biomass
Ecosystem
arthropods
arthropod
Food
food availability
food
biomass
rats
habitat
resource
habitats
home range
space and time
temporal variation
habitat structure

Keywords

  • Arthropod biomass
  • Conspecific abundance
  • Echimyidae
  • Escape cover
  • Resource availability
  • Resource selection function
  • Thrichomys

Cite this

Disentangling the effects of habitat, food, and intraspecific competition on resource selection by the spiny rat, Thrichomys fosteri. / Antunes, Pmela C.; Oliveira-Santos, Luiz Gustavo R.; Tomas, Walfrido M.; Forester, James D.; Fernandez, Fernando A.S.

In: Journal of Mammalogy, Vol. 97, No. 6, 01.01.2016, p. 1738-1744.

Research output: Contribution to journalArticle

Antunes, Pmela C. ; Oliveira-Santos, Luiz Gustavo R. ; Tomas, Walfrido M. ; Forester, James D. ; Fernandez, Fernando A.S. / Disentangling the effects of habitat, food, and intraspecific competition on resource selection by the spiny rat, Thrichomys fosteri. In: Journal of Mammalogy. 2016 ; Vol. 97, No. 6. pp. 1738-1744.
@article{49db574d27f742eeadf1412bda53f9c0,
title = "Disentangling the effects of habitat, food, and intraspecific competition on resource selection by the spiny rat, Thrichomys fosteri",
abstract = "Animals make directional movements toward resources to satisfy nutritional, reproductive, and protection needs. We evaluated resource selection by the spiny rat (Thrichomys fosteri) in a heterogeneous habitat, disentangling the relative importance of habitat structure, escape cover, food availability, and intraspecific competition. The last 2 variables were estimated directly by explicitly incorporating their spatiotemporal variation in the model. We radiotracked 15 males and 5 females for a median of 10 days per month for 17 months. Used and available resources were estimated at the home-range scale by intersecting the radiotracking locations (used) and random points (available) with resource maps that were either temporally static (measured only once; palm density and bromeliad cover) or dynamic (with temporal variation; arthropod biomass and conspecific abundance). We performed a resource selection function analysis using conditional logistic regression stratified by each individual location. Within their home ranges, spiny rats selected areas with high bromeliad cover and arthropod biomass. There was a negative interaction between conspecific abundance and arthropod biomass. We showed that resource selection by individuals takes into account multiple resources that vary in space and time. Individuals tended to select areas with high escape cover and high food availability balanced by low intraspecific competition.",
keywords = "Arthropod biomass, Conspecific abundance, Echimyidae, Escape cover, Resource availability, Resource selection function, Thrichomys",
author = "Antunes, {Pmela C.} and Oliveira-Santos, {Luiz Gustavo R.} and Tomas, {Walfrido M.} and Forester, {James D.} and Fernandez, {Fernando A.S.}",
year = "2016",
month = "1",
day = "1",
doi = "10.1093/jmammal/gyw140",
language = "English (US)",
volume = "97",
pages = "1738--1744",
journal = "Journal of Mammalogy",
issn = "0022-2372",
publisher = "Allen Press Inc.",
number = "6",

}

TY - JOUR

T1 - Disentangling the effects of habitat, food, and intraspecific competition on resource selection by the spiny rat, Thrichomys fosteri

AU - Antunes, Pmela C.

AU - Oliveira-Santos, Luiz Gustavo R.

AU - Tomas, Walfrido M.

AU - Forester, James D.

AU - Fernandez, Fernando A.S.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Animals make directional movements toward resources to satisfy nutritional, reproductive, and protection needs. We evaluated resource selection by the spiny rat (Thrichomys fosteri) in a heterogeneous habitat, disentangling the relative importance of habitat structure, escape cover, food availability, and intraspecific competition. The last 2 variables were estimated directly by explicitly incorporating their spatiotemporal variation in the model. We radiotracked 15 males and 5 females for a median of 10 days per month for 17 months. Used and available resources were estimated at the home-range scale by intersecting the radiotracking locations (used) and random points (available) with resource maps that were either temporally static (measured only once; palm density and bromeliad cover) or dynamic (with temporal variation; arthropod biomass and conspecific abundance). We performed a resource selection function analysis using conditional logistic regression stratified by each individual location. Within their home ranges, spiny rats selected areas with high bromeliad cover and arthropod biomass. There was a negative interaction between conspecific abundance and arthropod biomass. We showed that resource selection by individuals takes into account multiple resources that vary in space and time. Individuals tended to select areas with high escape cover and high food availability balanced by low intraspecific competition.

AB - Animals make directional movements toward resources to satisfy nutritional, reproductive, and protection needs. We evaluated resource selection by the spiny rat (Thrichomys fosteri) in a heterogeneous habitat, disentangling the relative importance of habitat structure, escape cover, food availability, and intraspecific competition. The last 2 variables were estimated directly by explicitly incorporating their spatiotemporal variation in the model. We radiotracked 15 males and 5 females for a median of 10 days per month for 17 months. Used and available resources were estimated at the home-range scale by intersecting the radiotracking locations (used) and random points (available) with resource maps that were either temporally static (measured only once; palm density and bromeliad cover) or dynamic (with temporal variation; arthropod biomass and conspecific abundance). We performed a resource selection function analysis using conditional logistic regression stratified by each individual location. Within their home ranges, spiny rats selected areas with high bromeliad cover and arthropod biomass. There was a negative interaction between conspecific abundance and arthropod biomass. We showed that resource selection by individuals takes into account multiple resources that vary in space and time. Individuals tended to select areas with high escape cover and high food availability balanced by low intraspecific competition.

KW - Arthropod biomass

KW - Conspecific abundance

KW - Echimyidae

KW - Escape cover

KW - Resource availability

KW - Resource selection function

KW - Thrichomys

UR - http://www.scopus.com/inward/record.url?scp=85045065957&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85045065957&partnerID=8YFLogxK

U2 - 10.1093/jmammal/gyw140

DO - 10.1093/jmammal/gyw140

M3 - Article

AN - SCOPUS:85045065957

VL - 97

SP - 1738

EP - 1744

JO - Journal of Mammalogy

JF - Journal of Mammalogy

SN - 0022-2372

IS - 6

ER -