Header

UZH-Logo

Maintenance Infos

Black rhinoceros (diceros bicornis) natural diets: comparing iron levels across seasons and geographical locations


Helary, Stephane F; Shaw, Joanne A; Brown, Derek; Clauss, Marcus; Owen-Smith, Norman (2012). Black rhinoceros (diceros bicornis) natural diets: comparing iron levels across seasons and geographical locations. Journal of Zoo and Wildlife Medicine, 43(3s):S48-S54.

Abstract

Although excessive iron storage in black rhinoceroses (Diceros bicornis) has been a cause for continuous concern over the last four decades, and differences in the iron content of diet items fed in captivity and in the wild have been documented, no reports exist on the iron content of the total diet ingested by free-ranging animals. Here, the results of field studies using back-tracking to record the ingested diets of black rhinoceroses from three habitats across three seasons are reported. Levels of iron and of condensed tannins, which might reduce iron availability, averaged at 91 ± 41 ppm dry matter and 3.0 ± 1.0 % dry matter, respectively, across all habitats and seasons. Although geographical and seasonal variation was significant, these differences are of a much lower magnitude than differences between the averages of these diets and those fed to black rhinoceroses in captivity. The results can provide guidelines for the iron content of diets designed for black rhinoceroses, and suggest that the effect of tannins in these species should be further investigated.

Abstract

Although excessive iron storage in black rhinoceroses (Diceros bicornis) has been a cause for continuous concern over the last four decades, and differences in the iron content of diet items fed in captivity and in the wild have been documented, no reports exist on the iron content of the total diet ingested by free-ranging animals. Here, the results of field studies using back-tracking to record the ingested diets of black rhinoceroses from three habitats across three seasons are reported. Levels of iron and of condensed tannins, which might reduce iron availability, averaged at 91 ± 41 ppm dry matter and 3.0 ± 1.0 % dry matter, respectively, across all habitats and seasons. Although geographical and seasonal variation was significant, these differences are of a much lower magnitude than differences between the averages of these diets and those fed to black rhinoceroses in captivity. The results can provide guidelines for the iron content of diets designed for black rhinoceroses, and suggest that the effect of tannins in these species should be further investigated.

Statistics

Citations

Altmetrics

Downloads

2 downloads since deposited on 19 Oct 2012
0 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:2012
Deposited On:19 Oct 2012 08:22
Last Modified:07 Dec 2017 15:22
Publisher:American Association of Zoo Veterinarians
ISSN:1042-7260
Publisher DOI:https://doi.org/10.1638/2011-0153.1

Download