Non-invasive monitoring of male and female numbat (Myrmecobius fasciatus: Myrmecobiidae) reproductive activity

Hogan, L. A., Lisle, A. T., Valentine, L., Johnston, S. D. and Robertson, H. (2012) Non-invasive monitoring of male and female numbat (Myrmecobius fasciatus: Myrmecobiidae) reproductive activity. Animal Reproduction Science, 133 3-4: 237-245. doi:10.1016/j.anireprosci.2012.07.005

Author Hogan, L. A.
Lisle, A. T.
Valentine, L.
Johnston, S. D.
Robertson, H.
Title Non-invasive monitoring of male and female numbat (Myrmecobius fasciatus: Myrmecobiidae) reproductive activity
Journal name Animal Reproduction Science   Check publisher's open access policy
ISSN 0378-4320
Publication date 2012-08
Sub-type Article (original research)
DOI 10.1016/j.anireprosci.2012.07.005
Volume 133
Issue 3-4
Start page 237
End page 245
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
Abstract The reproductive endocrinology of the highly endangered numbat (Myrmecobius fasciatus) is described for the first time. Patterns of faecal steroid secretion (progesterone [PM], oestradiol-17β [E2] and testosterone [TM] metabolites) were examined within a captive numbat population over 1 year and revealed a highly synchronized seasonal pattern of reproduction. TM secretion increased progressively from September to November, peaked in December and then decreased in February. All females displayed luteal phases (1-3), between late-November to late-March, in association with pregnant (Pr, n= 4), non-productive mated oestrous cycles (NMEC, n= 8) and non-mated oestrous cycles (NEC, n= 6). The mean oestrous cycle length was 30.2 ± 1.1. d (n= 11) and was comprised of a mean follicular (n= 11) and luteal (n= 18) phase length of 16.2 ± 1.6. d and 14.0 ± 0.8. d, respectively. No variation in mean luteal phase length or PM concentration according to cycle type (Pr, NMEC, NEC) or cycle number (1st, 2nd or 3rd cycle) was detected. Longitudinal profiling of PM secretion confirmed that the female numbat is seasonally polyoestrous and that the luteal phase occurs spontaneously. Changes in the secretion of E2 provided little instructive information on oestrous cycle activity. Mating success was 31%, with age and subject having no effect on mating success. Timing of introduction, of male to female, appeared to impact mating success, with paired animals introduced for a shorter time frame (≤14. d) prior to the first observed mating successfully producing young. Collectively, results of the present study confirm that PM and TM can be reliably used to index numbat reproductive activity.
Keyword Enzyme-immunoassay
Faecal steroids
Oestrous cycle
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 22 July 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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