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Predicting ejaculate quality and libido in male ostriches: Effect of season and age.

Bonato, Maud; Malecki, Irek A; Rybnik-Trzaskowska, Paulina K; Cornwallis, Charlie LU and Cloete, Schalk W P (2014) In Animal Reproduction Science 151(1-2). p.49-55
Abstract
The success of artificial breeding program depends largely on the reproductive performance of males. Male performance can vary with season and age impacting on quality and quantity of semen collected for artificial insemination purposes and therefore fertility of inseminated females. We examined variation in semen output and male libido of seven male ostriches (aged 2-5 years) over a period of 24 months. We collected ejaculates using a dummy female and measured semen characteristics (ejaculate volume, sperm concentration, number of spermatozoa per ejaculate, sperm motility and morphology) and male libido (willingness to mount the dummy). A total of 1006 ejaculates were collected. Across months, the volume of semen (mean±SEM) ranged from... (More)
The success of artificial breeding program depends largely on the reproductive performance of males. Male performance can vary with season and age impacting on quality and quantity of semen collected for artificial insemination purposes and therefore fertility of inseminated females. We examined variation in semen output and male libido of seven male ostriches (aged 2-5 years) over a period of 24 months. We collected ejaculates using a dummy female and measured semen characteristics (ejaculate volume, sperm concentration, number of spermatozoa per ejaculate, sperm motility and morphology) and male libido (willingness to mount the dummy). A total of 1006 ejaculates were collected. Across months, the volume of semen (mean±SEM) ranged from 1.03±0.12mL to 1.85±0.07mL, the sperm concentration from 3.21±0.12×10(9)/mL to 4.16±0.74×10(9)/mL, and the number of spermatozoa from 3.42±0.28×10(9) to 7.66±0.47×10(9). The largest volume of ejaculates and the highest number of sperm were collected in spring. Ejaculates with higher number of normal sperm were also collected in spring-early summer, whereas ejaculates with higher numbers of live abnormal and dead sperm were collected in winter. Sperm motility was relatively constant over months, despite a reduction in summer (January-February), while male libido peaked in winter (June-July) and spring (October-November). Furthermore, we observed high individual variation between males for all variables tested, except for motility. These results indicate that collections conducted in spring yield higher number of spermatozoa, when the libido of males is also at a maximum. Therefore in this species seasonal variation in semen quality should be considered in breeding programmes by artificial insemination to maximise fertility. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Animal Reproduction Science
volume
151
issue
1-2
pages
49 - 55
publisher
Elsevier
external identifiers
  • pmid:25282554
  • wos:000345819700008
  • scopus:84919330230
ISSN
1873-2232
DOI
10.1016/j.anireprosci.2014.09.015
language
English
LU publication?
yes
id
b4ded56d-b06c-4f6b-adcb-57e9c802f42f (old id 4737702)
date added to LUP
2014-11-10 13:33:55
date last changed
2017-01-01 04:02:11
@article{b4ded56d-b06c-4f6b-adcb-57e9c802f42f,
  abstract     = {The success of artificial breeding program depends largely on the reproductive performance of males. Male performance can vary with season and age impacting on quality and quantity of semen collected for artificial insemination purposes and therefore fertility of inseminated females. We examined variation in semen output and male libido of seven male ostriches (aged 2-5 years) over a period of 24 months. We collected ejaculates using a dummy female and measured semen characteristics (ejaculate volume, sperm concentration, number of spermatozoa per ejaculate, sperm motility and morphology) and male libido (willingness to mount the dummy). A total of 1006 ejaculates were collected. Across months, the volume of semen (mean±SEM) ranged from 1.03±0.12mL to 1.85±0.07mL, the sperm concentration from 3.21±0.12×10(9)/mL to 4.16±0.74×10(9)/mL, and the number of spermatozoa from 3.42±0.28×10(9) to 7.66±0.47×10(9). The largest volume of ejaculates and the highest number of sperm were collected in spring. Ejaculates with higher number of normal sperm were also collected in spring-early summer, whereas ejaculates with higher numbers of live abnormal and dead sperm were collected in winter. Sperm motility was relatively constant over months, despite a reduction in summer (January-February), while male libido peaked in winter (June-July) and spring (October-November). Furthermore, we observed high individual variation between males for all variables tested, except for motility. These results indicate that collections conducted in spring yield higher number of spermatozoa, when the libido of males is also at a maximum. Therefore in this species seasonal variation in semen quality should be considered in breeding programmes by artificial insemination to maximise fertility.},
  author       = {Bonato, Maud and Malecki, Irek A and Rybnik-Trzaskowska, Paulina K and Cornwallis, Charlie and Cloete, Schalk W P},
  issn         = {1873-2232},
  language     = {eng},
  number       = {1-2},
  pages        = {49--55},
  publisher    = {Elsevier},
  series       = {Animal Reproduction Science},
  title        = {Predicting ejaculate quality and libido in male ostriches: Effect of season and age.},
  url          = {http://dx.doi.org/10.1016/j.anireprosci.2014.09.015},
  volume       = {151},
  year         = {2014},
}