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Electroejaculation and seminal parameters in bonnet monkeys (Macaca radiata)
V Ramesh1, S G Ramachandra, H N Krishnamurthy
1Primate Research Laboratory, Indian Institute of Science, Bangalore, India.
Andrologia
|June 18, 1998
Summary
Semen collection from bonnet monkeys using penile stimulation yielded consistent results over three years. Sperm counts exhibited significant seasonality, peaking in the post-monsoon months.
Area of Science:
- Primate reproductive biology
- Andrology
- Wildlife science
Background:
- Bonnet monkeys are a key primate species in India.
- Understanding their reproductive characteristics is vital for conservation and research.
- Previous data on bonnet monkey semen parameters and seasonality is limited.
Purpose of the Study:
- To document the experience of collecting semen from adult bonnet monkeys.
- To characterize key features of bonnet monkey semen.
- To investigate potential seasonal variations in sperm count.
Main Methods:
- Semen samples were collected from adult bonnet monkeys every 15 days over a 3-year period.
- The penile stimulation method was employed for ejaculation.
- Sperm counts were analyzed and compared across different months and seasons.
Main Results:
- Penile stimulation proved to be a consistent method for semen collection, yielding increased semen volume.
- A distinct seasonality in bonnet monkey sperm count was observed.
- Sperm counts were significantly higher (P < 0.05) during the mid- and post-monsoon (July-November) compared to pre- and early monsoon (March-June) periods, with peak counts from August to October.
Conclusions:
- Penile stimulation is an effective and consistent method for bonnet monkey semen collection.
- Bonnet monkey sperm production is influenced by seasonal changes, particularly monsoon patterns.
- These findings provide valuable insights into bonnet monkey reproductive physiology and seasonal breeding patterns.