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Related Experiment Video

Updated: Jun 23, 2025

Utero-tubal Embryo Transfer and Vasectomy in the Mouse Model

Utero-tubal Embryo Transfer and Vasectomy in the Mouse Model

Published on: February 28, 2014

FIELD TECHNIQUES FOR VASECTOMY IN BLACK HOWLER MONKEYS (ALOUATTA PIGRA).

Samantha C Rummel¹, Andrew C Cushing², Christopher K Smith²

¹Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN 37996, USA, Samantharummel4@gmail.com.

Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians

|June 14, 2024

Summary

Vasectomizing black howler monkeys (Alouatta pigra) using a minimally invasive inguinal approach proved effective for population control. This field-friendly procedure ensured no impact on social dynamics or new pregnancies.

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Last Updated: Jun 23, 2025

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Published on: August 4, 2021

Area of Science:

Veterinary Surgery
Primate Conservation
Reproductive Biology

Background:

Population control in endangered species like black howler monkeys (Alouatta pigra) is crucial.
Surgical sterilization methods require evaluation for efficacy and minimal invasiveness.

Purpose of the Study:

To assess the efficacy of vasectomy for population control in black howler monkeys.
To compare the inguinal and pelvic surgical approaches for vasectomy in this species.

Main Methods:

Three adult black howler monkeys underwent vasectomy under general anesthesia.
Procedures included one pelvic approach and two inguinal approaches.
The ductus deferens was identified and ligated using a novel aspiration technique.

Main Results:

The inguinal approach was minimally invasive, with a mean operative time of 35 minutes.
Successful identification and ligation of the ductus deferens were achieved in all cases.
All monkeys recovered fully without complications, and no new pregnancies occurred in the troop.

Conclusions:

Vasectomy is an effective method for population control in black howler monkeys.
The inguinal approach is preferred due to its minimally invasive nature and suitability for field application.
The procedure did not disrupt the troop's social hierarchy or mating behaviors.