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Titolo:
The behavioural ecology of the island fox (Urocyon littoralis)
Autore:
Roemer, GW; Smith, DA; Garcelon, DK; Wayne, RK;
Indirizzi:
Univ Calif Los Angeles, Dept Organism Biol Ecol & Evol, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Inst Wildlife Studies, Arcata, CA 95518 USA Inst Wildlife Studies Arcata CA USA 95518 e Studies, Arcata, CA 95518 USA
Titolo Testata:
JOURNAL OF ZOOLOGY
, volume: 255, anno: 2001,
parte:, 1
pagine: 1 - 14
SICI:
0952-8369(200109)255:<1:TBEOTI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
HOME-RANGE; SPATIAL-ORGANIZATION; VULPES-CANA; NATURAL-POPULATIONS; MICROSATELLITE LOCI; GENETIC-MARKERS; LYCAON-PICTUS; KIT FOXES; GRAY FOX; PATERNITY;
Keywords:
dispersal; island fox; polygamy; population structure; Urocyon littoralis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
84
Recensione:
Indirizzi per estratti:
Indirizzo: Roemer, GW New Mexico State Univ, Dept Fisheries & Wildlife Sci, Las Cruces, NM 88003USA New Mexico State Univ Las Cruces NM USA 88003 ces, NM 88003USA
Citazione:
G.W. Roemer et al., "The behavioural ecology of the island fox (Urocyon littoralis)", J ZOOL, 255, 2001, pp. 1-14

Abstract

Insular populations typically occur at higher densities, have higher survivorship, reduced fecundity, decreased dispersal. and reduced aggression compared to their mainland counterparts. Insularity may also affect mating system and genetic population structure. However, these factors have not been examined simultaneously in any island vertebrate. Here we report on the ecological, behavioural and genetic characteristics of a small carnivore, the island fox Urocyon littoralis, from Fraser Point. Santa Cruz Island, California. Dispersal distances in island foxes are very low (mean 1.39 km. SID 1.26, range 0.16-3.58 knit, n = 8). Home-range size is one of the smallest (mean annual home range = 0.55 km(2), SID 0.2, n = 14) and density is nearlythe highest recorded for any canid species (2.4-15.9 foxes/km(2)). Similarto other fox species, island foxes are distributed as mated pairs that maintain discrete territories. Overlap among mated pairs was always high (mean0.85, SD 0.05), while overlap among neighbours (mean 0.11, SID 0.13), regardless of sex, was low. Despite this high degree of territoriality, island foxes are not strictly monogamous. Four of 16 offspring whose parents were identified by paternity analysis were a result of extra-pair fertilizations. Mated pairs were unrelated, however, suggesting inbreeding avoidance. Substantial population differentiation was found between the Fraser Point subpopulation and one only 13 km away (F-st = 0. 11). We suggest that the primary effect of finite island area is to limit dispersal, which then influences the demography, behaviour and genetic structure of island fox populations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 16:13:12