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Updated: May 4, 2026

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer
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Rutting behavior and androgen variation in reindeer (Rangifer tarandus L.).

T Mossing1, J E Damber

  • 1Department of Ecological Zoology, University of Umeå, S-901 87, Umeå, Sweden.

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|January 15, 2014
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Summary
This summary is machine-generated.

Reindeer exhibit distinct rutting behaviors, including scent marking and gland enlargement, coinciding with increased androgen levels. These behaviors, particularly strong odors, are concentrated during the peak mating season.

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Area of Science:

  • Animal behavior
  • Endocrinology
  • Mammalian reproduction

Background:

  • Reindeer (Rangifer tarandus) exhibit seasonal reproductive cycles.
  • Hormonal changes, particularly androgens, are known to influence animal behavior.

Purpose of the Study:

  • To investigate the rutting behavior of captive reindeer.
  • To correlate behavioral changes with androgen levels during the rutting season.

Main Methods:

  • Observation of captive reindeer behavior over three rutting seasons.
  • Collection and androgen analysis of blood samples from male reindeer.
  • Documentation of specific behaviors such as Flehmen, urination, and scent gland activity.

Main Results:

  • Androgen levels peaked in late September-early October, correlating with the rutting period.
  • Specific behaviors like Flehmen, hindleg urination, and preorbital gland enlargement occurred during the prerut and rut phases.
  • Distinct breath and urine odors appeared abruptly during the peak rut, persisting briefly.

Conclusions:

  • Reindeer rutting behavior is strongly influenced by seasonal androgen fluctuations.
  • Scent-related behaviors and odors are key components of reindeer reproductive displays.
  • The timing of these behaviors suggests a complex interplay between hormonal state and social signaling.