Fluctuations in bush and rock hyrax (Hyracoidea: Procaviidae) abundances over a 13-year period in the Matopos, Zimbabwe

Barry, Ronald E. (2015) Fluctuations in bush and rock hyrax (Hyracoidea: Procaviidae) abundances over a 13-year period in the Matopos, Zimbabwe.

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Official URL: http://ir.nust.ac.zw/xmlui/handle/123456789/610

Abstract

A Journal Article on Fluctuations in bush and rock hyrax (Hyracoidea: Procaviidae) abundances,Bush (Heterohyrax brucei ) and rock (Procavia capensis) hyraxes (Hyracoidea: Procaviidae) are abundant small mammals and important prey for vertebrate carnivores in the Rhodes Matopos National Park (RMNP), southwestern Zimbabwe. We monitored hyraxes at 20 observation stations in the 424 km 2 RMNP over a 13-year period (1993–2005). We identified hyraxes to species, and counted and aged them. From yearly counts and age distributions, we computed an index of relative abundance (AI – individuals/km 2 ) and estimate of produc- tivity (proportion of the sample comprising juveniles) for each species. Time series analysis showed that annual fluctuations in AI were marked, but not cyclic, with ranges of 0.4–113.8% (median = 30.0%) for Heterohyrax brucei and 3.7–64.7% (median = 11.0%) for Procavia capensis. Cross-correlation function revealed interspecific synchrony in annual fluctuation in numbers of individuals of the two species. A positive relationship existed between AI of H. brucei and rainfall of the previous austral summer, suggesting that annual precipitation contributes to fluctuations in abundance of this species; synchronous fluctuation of the two species suggests a common response to other regulating factors. Additional abiotic and biotic processes that potentially affected populations of both species are chronicled.

Item Type: Article
Uncontrolled Keywords: Heterohyrax brucei,Procavia capensis,Bush hyrax,Rock hyrax,Annual fluctuations
Divisions: Universities > State Universities > National University of Science and Technology
Depositing User: Mr. Edmore Sibanda
Date Deposited: 15 May 2017 22:00
Last Modified: 15 May 2017 22:00
URI: http://researchdatabase.ac.zw/id/eprint/4554

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