File(s) not publicly available

Koala birth seasonality and sex ratios across multiple sites in Queensland, Australia

journal contribution
posted on 06.12.2017, 00:00 by William Ellis, F Bercovitch, S FitzGibbon, Alistair Melzer, D De Villiers, D Dique
Establishing accurate demographic information for free-ranging populations of animals is difficult without knowledge of individual chronological age. We estimated the birth dates of 743 koala (Phascolarctos cinereus) joeys at 3 sites in Queensland, Australia, using body mass obtained from a reference population with known birth dates. From these age estimates we compared the annual distribution of births across calendar months. At all 3 locations about 60% of births occurred between December and March. The annual pattern of births was identical for males and females within locations, but overall annual patterns of births differed between the southern and northern sites. We conclude that koalas can bear offspring in every month of the year, but breed seasonally across Australia, and that a sex bias in the timing of births is absent from most regions.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

91

Issue

1

Start Page

177

End Page

182

Number of Pages

6

ISSN

0022-2372

Location

USA

Publisher

American Society of Mammalogists

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Centre for Mined Land Rehabilitation; Environmental Protection Agency; GHD Pty Ltd (Firm); Koala Research Centre of Central Queensland; School of Integrative Biology; TBA Research Institute; Zoological Society of San Diego;

Era Eligible

Yes

Journal

Journal of mammalogy.

Exports

CQUniversity

Categories

Exports