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Spatial integration in infant sable antelope, Hippotragus niger

Thompson1

  • 1Department of Zoology, University of Maryland

Animal Behaviour
|December 16, 1998
PubMed
Summary

Birth timing influences sable antelope calf social integration. Early-born calves use crèches longer, while late-born calves integrate faster, suggesting social cover impacts development.

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Area of Science:

  • Ethology
  • Behavioral Ecology
  • Conservation Biology

Background:

  • Infant sable antelope (Hippotragus niger) exhibit a 'hiding' behavior, initially secluded from the herd.
  • Calves gradually increase social interaction and form crèches with peers as they mature.

Purpose of the Study:

  • To investigate the relationship between birth timing within a cohort and the rate of spatial integration into the herd in sable antelope calves.
  • To determine how peer availability (birth clustering) affects calf social development and herd integration.

Main Methods:

  • Observation of six cohorts of semi-free-ranging sable antelope calves at the National Zoological Park's Conservation and Research Center.
  • Recording calf birth dates, crèche formation, and spatial proximity to the main herd during resting and activity periods.

Main Results:

  • The rate of spatial integration was dependent on calf birth date and the availability of same-aged peers.
  • First-born calves stayed in crèches longer and integrated later, while last-born calves integrated earlier without forming crèches.
  • Crèche groups appeared to synchronize their entry into the main herd.

Conclusions:

  • Birth timing and peer availability significantly influence the social integration trajectory of sable antelope calves.
  • Crèches may provide social cover for vulnerable calves during early integration stages.
  • Individual differences in integration rates may reflect adaptive responses to perceived environmental protection.

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