Document Detail

Seasonal reproduction in wild and captive male koala (Phascolarctos cinereus) populations in south-east Queensland.
MedLine Citation:
PMID:  20353729     Owner:  NLM     Status:  MEDLINE    
The effects of breeding season (late spring to early autumn) on south-east Queensland male koala fertility were examined to improve the efficacy of the AI procedure and to determine the practicality of using free-range animals as semen donors for a genome resource bank. Seasonal changes in male koala reproductive function were assessed in a wild free-range population (n = 14; obtained every 6 weeks from January to November 2005), a necropsied healthy wild population (n = 84; obtained monthly from September 2004 to August 2005) and a captive population (n = 7; obtained monthly from October 2005 to October 2006). Reproductive parameters investigated included bodyweight, coat score, sternal gland area and activity, testosterone secretion, reproductive anatomy volume and semen quality (before and after cryopreservation). Collectively, these findings show that reproduction in male koalas from south-east Queensland changes seasonally and that winter appears to be the optimal season in which to collect semen samples by electroejaculation. While it was possible to repeatedly collect semen from free-range koalas for future genetic management via potential storage in a genome resource bank, the survival of these spermatozoa after cryopreservation was poor and will require further improvement.
Camryn D Allen; Deidr? L de Villiers; Brett D Manning; David S Dique; Michelle Burridge; Mandy L Chafer; Vere N Nicolson; Sophia C Jago; Allan J McKinnon; Rosemary J Booth; Jeff J McKee; Michael J Pyne; Yeng Peng Zee; Geoff Lundie-Jenkins; Peter Theilemann; Richard J Wilson; Frank N Carrick; Stephen D Johnston
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Reproduction, fertility, and development     Volume:  22     ISSN:  1031-3613     ISO Abbreviation:  Reprod. Fertil. Dev.     Publication Date:  2010  
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-06-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8907465     Medline TA:  Reprod Fertil Dev     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  695-709     Citation Subset:  IM    
School of Animal Studies, The University of Queensland, Gatton, Qld 4343, Australia.
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MeSH Terms
Animals, Wild
Body Weight / physiology
Conservation of Natural Resources
Cryopreservation / veterinary
Insemination, Artificial / methods,  veterinary*
Linear Models
Organ Size / physiology
Phascolarctidae / physiology*
Reproduction / physiology*
Semen Preservation / veterinary
Sperm Motility / physiology
Spermatozoa / physiology
Testis / anatomy & histology,  physiology
Testosterone / blood
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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