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Titolo:
Population dynamics of three species of dasyurid marsupials in arid central Australia: a 10-year study
Autore:
Dickman, CR; Haythornthwaite, AS; McNaught, GH; Mahon, PS; Tamayo, B; Letnic, M;
Indirizzi:
Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia Univ Sydney SydneyNSW Australia 2006 ol Sci, Sydney, NSW 2006, Australia Univ Sydney, Inst Wildlife Res, Sydney, NSW 2006, Australia Univ Sydney Sydney NSW Australia 2006 fe Res, Sydney, NSW 2006, Australia New S Wales Natl Parks & Wildlife Serv, Hurstville, NSW 2220, Australia New S Wales Natl Parks & Wildlife Serv Hurstville NSW Australia 2220 alia
Titolo Testata:
WILDLIFE RESEARCH
fascicolo: 5, volume: 28, anno: 2001,
pagine: 493 - 506
SICI:
1035-3712(2001)28:5<493:PDOTSO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SMINTHOPSIS-CRASSICAUDATA; SMALL MAMMALS; RODENT POPULATIONS; WESTERN-AUSTRALIA; PLANIGALE-GILESI; SIMPSON DESERT; RAINFALL; REPRODUCTION; HABITAT; FLUCTUATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
81
Recensione:
Indirizzi per estratti:
Indirizzo: Dickman, CR Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia Univ Sydney Sydney NSW Australia 2006 ey, NSW 2006, Australia
Citazione:
C.R. Dickman et al., "Population dynamics of three species of dasyurid marsupials in arid central Australia: a 10-year study", WILDLIF RES, 28(5), 2001, pp. 493-506

Abstract

This study investigated the population dynamics of three species of dasyurid marsupials in sand ridge habitat of the Simpson Desert, western Queensland, over a 10-year period between March 1990 and December 1999. The lesser hairy-footed dunnart (Sminthopsis youngsoni), was captured most consistently over the period of study, followed by the wongai ningaui (Ningaui ridei),and the mulgara (Dasycercus cristicauda). Rates of recapture were low (4.5-22.2%), probably because individuals of each species are very mobile. All species bred in late winter or early spring when animals were aged at least8-10 months, and independent juveniles first appeared usually in summer. S. youngsoni reared a second litter in late spring or early summer in 3 of the 10 years studied, when the availability of food was likely to have been high; neither N. ridei nor D. cristicauda were known to attempt a second litter within a season. To explore factors that might influence population dynamics, we compared capture rates of each species with measures of rainfall, temperature, vegetation cover, abundance of predators [feral cats (Felis catus), red foxes (Vulpes vulpes), and goannas (Varanus spp.)], dragons, other dasyurids and indices of food abundance. The abundance of S. youngsoni appeared to depend primarily on the cover of spinifex 7-9 months earlier, that of D. cristicaudawas related most strongly to rainfall 7-9 months earlier, while that of N.ridei was related to minimum temperature lagged by 1-3 months. While the dynamics of other arid-zone mammals are driven demonstrably by interactions between rainfall, resource availability and predation, our findings suggest that dasyurids have limited flexibility in their life histories and are influenced more subtly and by factors such as facilitation that are just beginning to become apparent.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 22:47:54