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Frozen embryos? Torpor during pregnancy in the Tasmanian short-beaked echidna Tachyglossus aculeatus setosus

Citation

Morrow, GE and Jones, SM and Nicol, SC, Frozen embryos? Torpor during pregnancy in the Tasmanian short-beaked echidna Tachyglossus aculeatus setosus, General and Comparative Endocrinology: An International Journal, 244 pp. 139-145. ISSN 0016-6480 (2017) [Refereed Article]

Copyright Statement

Copyright 2015 Elsevier Inc.

DOI: doi:10.1016/j.ygcen.2015.11.006

Abstract

We studied the interaction between torpor and reproduction in free-ranging female Tasmanian echidnas using a combination of techniques including urogenital smears, hormone analysis, ultrasonography, external temperature loggers and camera traps. Male echidnas initiated mating activity by locating hibernating females. All females that mated or were disturbed by males prior to July 27 re-entered hibernation, including many that were pregnant. Pregnant females only entered hibernation in early pregnancy when plasma progesterone concentrations were about twice basal and progesterone then remained constant during torpor. By re-entering hibernation pregnant females extended their gestation period and delayed egg-laying. Progesterone peaked 46 days before egg-laying, then dropped rapidly.

Item Details

Item Type:Refereed Article
Keywords:monotreme, progesterone, reproduction, torpor, vaginal cytology, short-beaked echidna
Research Division:Biological Sciences
Research Group:Physiology
Research Field:Comparative Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Morrow, GE (Ms Gemma Morrow)
Author:Jones, SM (Professor Susan Jones)
Author:Nicol, SC (Associate Professor Stewart Nicol)
ID Code:115974
Year Published:2017
Web of Science® Times Cited:1
Deposited By:Zoology
Deposited On:2017-04-24
Last Modified:2017-05-01
Downloads:0

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