Dispersion and site fidelity in a tent-roosting population of the short-nosed fruit bat (Cynopterus sphinx) in southern India

Jay F Storz, J. Balasingh, P. Thiruchenthil Nathan, K. Emmanuel, Thomas H. Kunz

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Patterns of dispersion and site fidelity were investigated in a tent-roosting population of the short-nosed fruit bat, Cynopterus sphinx (Megachiroptera), in southern India. A local population of C. sphinx occupied diurnal roosts in a variable subset of 45 stem tents constructed within the dense foliage of mast trees (Polyalthia longifolia). Individually marked tent-roosting bats were visually censused over the course of a 38-d interval spanning the postpartum oestrus period. On any given day, 33.3-85.7% (mean = 60.8%, SD = 14.2) of adult males roosted singly, with the remainder holding harems of 1-10 breeding females (mean = 3.01, SD = 0.79). Average harem sex ratio was 2.8-fold higher than the adult sex ratio of the total tent-roosting population within the study area, indicating the potential for a high variance in male mating success within a single breeding season. Bats of both sexes typically occupied one primary tent, interspersed with shorter periods of residency in alternate tents. Males exhibited a significantly higher degree of roost fidelity than females. Some females roosted sequentially with different males and with different combinations of females, whereas others remained continuously associated with a single male and/or particular female roostmates over the duration of the census period. There were no statistically significant relationships between physical characteristics of tents and rates of occupancy by males or females. Intermittent transfers by females between groups suggest that the defence of diurnal roosts by males represents a more profitable mating strategy than the direct defence of compositionally labile female groups.

Original languageEnglish (US)
Pages (from-to)117-131
Number of pages15
JournalJournal of Tropical Ecology
Volume16
Issue number1
DOIs
StatePublished - Jan 1 2000

Fingerprint

Cynopterus
Sphinx
roosting
site fidelity
philopatry
bat
Chiroptera
fruit
India
fruits
harem
sex ratio
Polyalthia longifolia
postpartum interval
mating success
breeding season
foliage
estrus
census
breeding

Keywords

  • Behaviour
  • Chiroptera
  • Cynopterus sphinx
  • Dispersion
  • India
  • Mating system
  • Polygyny
  • Sex ratio
  • Site-fidelity
  • Tent-making bats

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Dispersion and site fidelity in a tent-roosting population of the short-nosed fruit bat (Cynopterus sphinx) in southern India. / Storz, Jay F; Balasingh, J.; Thiruchenthil Nathan, P.; Emmanuel, K.; Kunz, Thomas H.

In: Journal of Tropical Ecology, Vol. 16, No. 1, 01.01.2000, p. 117-131.

Research output: Contribution to journalArticle

Storz, Jay F ; Balasingh, J. ; Thiruchenthil Nathan, P. ; Emmanuel, K. ; Kunz, Thomas H. / Dispersion and site fidelity in a tent-roosting population of the short-nosed fruit bat (Cynopterus sphinx) in southern India. In: Journal of Tropical Ecology. 2000 ; Vol. 16, No. 1. pp. 117-131.
@article{636a38882806463a91658a61dee2da82,
title = "Dispersion and site fidelity in a tent-roosting population of the short-nosed fruit bat (Cynopterus sphinx) in southern India",
abstract = "Patterns of dispersion and site fidelity were investigated in a tent-roosting population of the short-nosed fruit bat, Cynopterus sphinx (Megachiroptera), in southern India. A local population of C. sphinx occupied diurnal roosts in a variable subset of 45 stem tents constructed within the dense foliage of mast trees (Polyalthia longifolia). Individually marked tent-roosting bats were visually censused over the course of a 38-d interval spanning the postpartum oestrus period. On any given day, 33.3-85.7{\%} (mean = 60.8{\%}, SD = 14.2) of adult males roosted singly, with the remainder holding harems of 1-10 breeding females (mean = 3.01, SD = 0.79). Average harem sex ratio was 2.8-fold higher than the adult sex ratio of the total tent-roosting population within the study area, indicating the potential for a high variance in male mating success within a single breeding season. Bats of both sexes typically occupied one primary tent, interspersed with shorter periods of residency in alternate tents. Males exhibited a significantly higher degree of roost fidelity than females. Some females roosted sequentially with different males and with different combinations of females, whereas others remained continuously associated with a single male and/or particular female roostmates over the duration of the census period. There were no statistically significant relationships between physical characteristics of tents and rates of occupancy by males or females. Intermittent transfers by females between groups suggest that the defence of diurnal roosts by males represents a more profitable mating strategy than the direct defence of compositionally labile female groups.",
keywords = "Behaviour, Chiroptera, Cynopterus sphinx, Dispersion, India, Mating system, Polygyny, Sex ratio, Site-fidelity, Tent-making bats",
author = "Storz, {Jay F} and J. Balasingh and {Thiruchenthil Nathan}, P. and K. Emmanuel and Kunz, {Thomas H.}",
year = "2000",
month = "1",
day = "1",
doi = "10.1017/S0266467400001309",
language = "English (US)",
volume = "16",
pages = "117--131",
journal = "Journal of Tropical Ecology",
issn = "0266-4674",
publisher = "Cambridge University Press",
number = "1",

}

TY - JOUR

T1 - Dispersion and site fidelity in a tent-roosting population of the short-nosed fruit bat (Cynopterus sphinx) in southern India

AU - Storz, Jay F

AU - Balasingh, J.

AU - Thiruchenthil Nathan, P.

AU - Emmanuel, K.

AU - Kunz, Thomas H.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - Patterns of dispersion and site fidelity were investigated in a tent-roosting population of the short-nosed fruit bat, Cynopterus sphinx (Megachiroptera), in southern India. A local population of C. sphinx occupied diurnal roosts in a variable subset of 45 stem tents constructed within the dense foliage of mast trees (Polyalthia longifolia). Individually marked tent-roosting bats were visually censused over the course of a 38-d interval spanning the postpartum oestrus period. On any given day, 33.3-85.7% (mean = 60.8%, SD = 14.2) of adult males roosted singly, with the remainder holding harems of 1-10 breeding females (mean = 3.01, SD = 0.79). Average harem sex ratio was 2.8-fold higher than the adult sex ratio of the total tent-roosting population within the study area, indicating the potential for a high variance in male mating success within a single breeding season. Bats of both sexes typically occupied one primary tent, interspersed with shorter periods of residency in alternate tents. Males exhibited a significantly higher degree of roost fidelity than females. Some females roosted sequentially with different males and with different combinations of females, whereas others remained continuously associated with a single male and/or particular female roostmates over the duration of the census period. There were no statistically significant relationships between physical characteristics of tents and rates of occupancy by males or females. Intermittent transfers by females between groups suggest that the defence of diurnal roosts by males represents a more profitable mating strategy than the direct defence of compositionally labile female groups.

AB - Patterns of dispersion and site fidelity were investigated in a tent-roosting population of the short-nosed fruit bat, Cynopterus sphinx (Megachiroptera), in southern India. A local population of C. sphinx occupied diurnal roosts in a variable subset of 45 stem tents constructed within the dense foliage of mast trees (Polyalthia longifolia). Individually marked tent-roosting bats were visually censused over the course of a 38-d interval spanning the postpartum oestrus period. On any given day, 33.3-85.7% (mean = 60.8%, SD = 14.2) of adult males roosted singly, with the remainder holding harems of 1-10 breeding females (mean = 3.01, SD = 0.79). Average harem sex ratio was 2.8-fold higher than the adult sex ratio of the total tent-roosting population within the study area, indicating the potential for a high variance in male mating success within a single breeding season. Bats of both sexes typically occupied one primary tent, interspersed with shorter periods of residency in alternate tents. Males exhibited a significantly higher degree of roost fidelity than females. Some females roosted sequentially with different males and with different combinations of females, whereas others remained continuously associated with a single male and/or particular female roostmates over the duration of the census period. There were no statistically significant relationships between physical characteristics of tents and rates of occupancy by males or females. Intermittent transfers by females between groups suggest that the defence of diurnal roosts by males represents a more profitable mating strategy than the direct defence of compositionally labile female groups.

KW - Behaviour

KW - Chiroptera

KW - Cynopterus sphinx

KW - Dispersion

KW - India

KW - Mating system

KW - Polygyny

KW - Sex ratio

KW - Site-fidelity

KW - Tent-making bats

UR - http://www.scopus.com/inward/record.url?scp=0033982097&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033982097&partnerID=8YFLogxK

U2 - 10.1017/S0266467400001309

DO - 10.1017/S0266467400001309

M3 - Article

VL - 16

SP - 117

EP - 131

JO - Journal of Tropical Ecology

JF - Journal of Tropical Ecology

SN - 0266-4674

IS - 1

ER -