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Determining the Composition of Herbivore Diets in the Trans-Himalayan Rangelands: A Comparison of Field Methods
Author
Shrestha, Rinjan
Wegge, Per
Publisher
Society for Range Management
Publication Year
2006-09-01
Body

In late summer, in a semi-arid mountain range in Nepal, we compared 3 field methods for determining the botanical compositionof herbivore diets. Data were collected from the same animals belonging to 1 herd of domestic yak (Bos grunniens) and 2 herds of mixed smallstock, consisting of domestic goats (Capra hircus) and sheep (Ovis aries). Bite count, feeding site examination,and microhistological analysis of feces gave different estimates of forage categories and plant species in both animal groups. Because yaks grazed in other vegetation communities when not observed for bite-counts and feeding signs, the results from the latter methods could not be compared directly with that from fecal analysis. In smallstock, feeding site examination gave higher estimates of graminoids and lower estimates of shrubs than the other 2 methods, probably because all feeding signs on shrubs were not detected. Bite-counts and fecal analysis gave comparable results, except that forbs were underestimated by fecal analysis, presumably due to their more complete digestion. Owing to the difficulty in collecting samples that are representative of the entire grazing period and the problem of recording feeding signs correctly, both feeding site examination and bite-counts are unsuitable methods for studying the food habits of free ranging domestic and wild herbivores. Microhistological analysis of feces appears to be the most appropriate method, but correction factors are needed to adjust for differential digestion. The systematic use of photomicrographs improves the speed and accuracy of the fecal analysis. The Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020 Legacy DOIs that must be preserved: 10.2458/azu_jrm_v59i5_shrestha

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2111/06-022R2.1
Additional Information
Shrestha, R., & Wegge, P. (2006). Determining the composition of herbivore diets in the trans-Himalayan rangelands: A comparison of field methods. Rangeland Ecology & Management, 59(5), 512-518.
ISSN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/643102
Journal Volume
59
Journal Number
5
Journal Pages
512-518
Collection
Rangeland Ecology & Management (REM)
Journal Name
Rangeland Ecology & Management
Keywords
bite count
Bos grunniens
Capra bircus
fecal analysis
feeding site examination
food habits
Ovis aries