TITLE

Mortality and female fecundity in an expanding black rhinoceros ( Diceros bicornis minor) population

AUTHOR(S)
Law, Peter R.; Fike, Brad; Lent, Peter C.
PUB. DATE
August 2013
SOURCE
European Journal of Wildlife Research;Aug2013, Vol. 59 Issue 4, p477
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Identifying factors that affect demographic parameters and how those factors act is vital for understanding population dynamics, especially of endangered species. Moreover, specific ideas in the population dynamics of large herbivores underpin the management of the critically endangered black rhinoceros ( Diceros bicornis). We studied an expanding black rhinoceros population since its establishment in 1986 in the Great Fish River Reserve, South Africa, through 2008 when managed removals interrupted natural dynamics. During the study, only 13 animals died, of which nine were subadults. In a linear modelling context, we used information-theoretic methods to evaluate the influence of independent variables expected to affect demographic parameters. For females, age at first reproduction (AFR) increased with abundance, but there was no effect of abundance on adult fecundity as measured by inter-birth intervals (IBIs). We evaluated these results in the theoretical context of population dynamics of large herbivores, in particular, Eberhardt's proposal of a specific sequence in which demographic parameters first respond to increasing density. Our observations are consistent with Eberhardt's prediction that immature individuals are impacted before adults, but the relative timing and magnitude of density effects on immature individuals was unclear. Rainfall did not influence AFR or IBIs. Maternal age influenced IBIs but much of the observed variation in IBIs was not accounted for by structural variation. Studies of populations more nearly approaching a stable age distribution and carrying capacity are needed to resolve remaining uncertainties and ambiguities in the life history of the black rhinoceros in particular and megaherbivores in general.
ACCESSION #
89046657

 

Related Articles

  • Distribution, Habitat Correlates, and Conservation of Loris lydekkerianus in Karnataka, India. Kumara, H. N.; Singh, Mewa; Kumar, Shanthala // International Journal of Primatology;Aug2006, Vol. 27 Issue 4, p941 

    We surveyed slender lorises (Loris lydekkerianus) in Karnataka, south India intermittently during November 2001–July 2004 and estimated their relative abundance via direct sightings. Two subspecies, Loris lydekkerianus lydekkerianus and L. l. malabaricus, with different morphological...

  • Demography and dynamics of mountain nyala Tragelaphus buxtoni in the Bale Mountains National Park, Ethiopia. Mamo, Yosef; Pinard, Michelle A.; Bekele, Afework // Current Zoology;2010, Vol. 56 Issue 6, p660 

    We studied the population dynamics of endangered mountain nyala Tragelaphus buxtoni between 2003-2005 in the Bale Mountains National Park. Line-transect sampling and total count methods were used to gather data on demographics and movement patterns. The population's age-group composition was 58%...

  • Wildlife Protections. KEEL, MICHAEL // WHOA Magazine;Spring2013, p60 

    The author discusses the effort of the administrators of the San Francisco Zoo in California in protecting wildlife animals. He cites the zoo's 160 volunteers and approximately 200 employees, who educate and inspire the public about nature and advance conservation. The author also commends the...

  • AFRICA RHINO CONSERVATION. Slattery, Derek M. // PSA Journal;Jul2003, Vol. 69 Issue 7, p24 

    Highlights the efforts to protect the black rhinoceros in Africa, particularly in Kenya, as of July 1, 2003. Extinction of the species in subsaharan Africa; Policy implemented by the Wildcard Members Development group regarding the translocation of Black Rhinos into specially protected areas;...

  • Shoot to Save?  // Earth Island Journal;Spring2014, Vol. 29 Issue 1, p4 

    The article reports on the opposition being faced by the Safari Club in Namibia, by the activists of animals' welfare, for organizing an auction selling the permit to hunt an endangered African black rhinoceros. The club states that the auction was to discourage the killing of this threatened...

  • AFRICA: BAN LIFTED ON HUNTING BLACK RHINOS.  // New York Amsterdam News;10/7/2004, Vol. 95 Issue 41, p2 

    The article reports that wildlife conservationists and government delegates meeting in Bangkok, Thailand, have lifted a ban on hunting the rare black rhinoceros in southern Africa. Members of the Convention on International Trade in Endangered Species (CITES) approved a request by Namibia Monday...

  • Host density drives macroparasite abundance across populations of a critically endangered megaherbivore. Stringer, A.; Linklater, W. // Oecologia;Sep2015, Vol. 179 Issue 1, p201 

    What determines the abundance of parasites is a central question within epidemiology. Epidemiological models predict that density-dependent transmission has a principal influence on parasite abundance. However, this mechanism is seldom tested in macroparasites, perhaps because multiple,...

  • Are current protections of land snails in Hungary relevant to conservation? SÓLYMOS, PÉTER // Biodiversity & Conservation;Feb2007, Vol. 16 Issue 2, p347 

    Legal instruments for species conservation have been criticised because they take a long time to draw up and implement and because invertebrates are highly underrepresented. For these reasons legal documents need regular re-evaluation as more data and effective methods are available. The...

  • A NOVEL APPROACH FOR ASSESSING DENSITY AND RANGE-WIDE ABUNDANCE OF PRAIRIE DOGS. Facka, Aaron N.; Ford, Paulette L.; Roemer, Gary W. // Journal of Mammalogy;Apr2008, Vol. 89 Issue 2, p356 

    Habitat loss, introduced disease, and government-sponsored eradication programs have caused population declines in all 5 species of prairie dogs. Black-tailed prairie dogs (Cynomys ludovicianus) currently occupy only about 2% of an extensive geographic range (160 million hectares) and were...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics