Reproductive biology of captive southern hairy-nosed wombats (Lasiorhinus latifrons). Part 1: oestrous cycle characterisation
Alyce M. Swinbourne A C D , Stephen D. Johnston A , Tina Janssen C , Alan Lisle A and Tamara Keeley A
+ Author Affiliations
- Author Affiliations
A Wildlife Science Unit, School of Agriculture and Food Science, Ground Floor, Building 8117A, The University of Queensland, Gatton, Qld 4343, Australia.
B Centre of Animal Welfare and Ethics, School of Veterinary Science, Room 102, White House (Gatton), The University of Queensland, Gatton, Qld 4343, Australia
C Australian Animals Care and Education, PO Box 138, Mount Larcom, Qld 4695, Australia.
D Corresponding author. Email: alyce.swinbourne@adelaide.edu.au
Reproduction, Fertility and Development 30(11) 1412-1423 https://doi.org/10.1071/RD17497
Submitted: 27 November 2017 Accepted: 3 April 2018 Published: 10 May 2018
Abstract
Southern hairy-nosed wombats (SHNWs: Lasiorhinus latifrons) do not breed well in captivity. To better understand their reproduction, daily urine samples were collected from nine captive females and analysed for volume (mL), specific gravity and a qualitative index of the number of epithelial cells, then stored at −20°C until samples could be analysed for progesterone metabolites (P4M). The mean oestrous cycle length was 35.1 ± 2.4 days; however, individual cycle length ranged from 23 to 47 days. The mean luteal phase length was 20.8 ± 1.3 days (range: 12 to 33 days). Urinary P4M was divided into four oestrous cycle stages: (1) early follicular phase, (2) late follicular phase, (3) early luteal phase, (4) late luteal phase, and analysed against urinary characteristics. During the late follicular phase, urine volume decreased (P = 0.002) while urine specific gravity (P = 0.001) and concentration of epithelial cells (P = 0.004) both increased. The level of variability in oestrous cycle length suggests that some captive females may exhibit abnormal cycles; however, the changes in the urinary characteristics associated with the different stages of the oestrous cycle appear to offer a possible non-invasive means of monitoring the reproductive status of captive SHNWs.
Additional keywords: endocrinology, marsupial, progesterone, urine.
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