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title Sex-biases in distribution and resource use at different spatial scales in a migratory shorebird
authors Alves, JA; Gunnarsson, TG; Potts, PM; Sutherland, WJ; Gill, JA
title Sex-biases in distribution and resource use at different spatial scales in a migratory shorebird
nationality nacional
source ECOLOGY AND EVOLUTION
language English
document type Article
author keywords Foraging; migratory range; non-breeding; segregation; sex dimorphism; waders
keywords plus TAILED GODWITS LIMOSA; SIZE DIMORPHISM; NEREIS-DIVERSICOLOR; LATITUDINAL CLINES; BODY-WEIGHT; HABITAT USE; WADDEN SEA; EGG SIZE; BIRDS; CONSEQUENCES
abstract In migratory species, sexual size dimorphism can mean differing energetic requirements for males and females. Differences in the costs of migration and in the environmental conditions occurring throughout the range may therefore result in sex-biases in distribution and resource use at different spatial scales. In order to identify the scale at which sexual segregation operates, and thus the scale at which environmental changes may have sex-biased impacts, we use range-wide tracking of individually color-ringed Icelandic black-tailed godwits (Limosa limosa islandica) to quantify sexual segregation at scales ranging from the occupation of sites throughout the non-breeding range to within-site differences in distribution and resource use. Throughout the range of this migratory shorebird, there is no evidence of large-scale sex differences in distribution during the non-breeding season. However, the sexes differ in their selection of prey types and sizes, which results in small-scale sexual segregation within estuaries. The scale of sexual segregation therefore depends on the scale of variation in resource distribution, which, in this system, is primarily within estuaries. Sexual segregation in within-site distribution and resource use means that local-scale anthropogenic impacts on estuarine benthic prey communities may disproportionately affect the sexes in these migratory shorebirds.
e-mail address j.alves@uea.ac.uk
funding agency and grant number Calouste Gulbenkian Foundation; Arcadia Fund; NERC
cited reference count 62
times cited 5
total times cited count (wos, bci, and cscd) 5
publisher WILEY-BLACKWELL
publisher city HOBOKEN
publisher address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
issn 2045-7758
29-character source abbreviation ECOL EVOL
iso source abbreviation Ecol. Evol.
publication date APR
year published 2013
volume 3
issue 4
beginning page 1079
ending page 1090
digital object identifier (doi) 10.1002/ece3.503
page count 12
web of science category Ecology
subject category Environmental Sciences & Ecology
document delivery number 126FW
unique article identifier WOS:000317599300024
link http://dx.doi.org/10.1002/ece3.503
CESAM authors