Nutritional Quality of Mule Deer Diets in the Texas Panhandle

Show full item record

Title: Nutritional Quality of Mule Deer Diets in the Texas Panhandle
Author: Sowell, Bok Forrest
Abstract: Increased brush control in the Texas Panhandle has prompted the need for baseline information on mule deer in order to assess potential impacts of habitat modifications . Since there was little published information concerning food habits or nutritional quality of mule deer forages in the Texas Panhandle , this study was conducted to : (1 ) identify plant species consumed by mule deer , (2 ) determine the crude protein (CP ) , phosphorus (P ) , and digestible energy (DE ) content of plant species selected , and (3 ) estimate seasonal nutrient levels of mule deer diets . Two study areas were selected . The Canadian River Study Area (CRSA ) was located along the breaks of the Canadian River in Oldham County , and the Clarendon Study Area (CSA ) was located near Clarendon , Texas in Donley County . Deer on both areas consumed primarily forbs (40 % ) in the spring , but deer on the CRSA took a large amount (24 % ) of sand sagebrush . Skunkbush sumac was the dominant plant species (42 % ) in the summer and fall diets on the CRSA . Half -shrubs , skunkbush sumac and forbs were taken in equal proportions (25 % ) each during the summer on the CSA . Fall diets on the CSA consisted mainly of half -shrub sundrop (24 % ) , skunkbush sumac (14 % ) , and juniper (7 % ) . Winter diets or the CRSA contained mostly forbs (53 % ) , juniper (15 % ) and skunkbush sumac (10 % ) . Winter diets on the CSA consisted mostly of wheat /rye (27 % ) and juniper (27 % ) . Analyses of seasonal diets on the CRSA indicated mule deer were on a poor to fair nutritional plane . Percent CP remained at 7 from summer through winter , and went to a high of 10 in the spring . Phosphorus levels ranged from 0 .12 to 0 .14 % from summer through winter and rose to 0 .17 % in the spring . Digestible energy was low (1875 kcal /kg annual average ) , but was probably adequate for moderate growth and production in all seasons except fall . Analyses of seasonal diets on the CSA indicated mule deer from this area were on a fair to good nutritional plane due mostly to the presence of wheat /rye . Crude protein estimates ranged from 13 % in the spring , 8 % through the summer and fall , to 11 % in the winter . Phosphorus levels were lowest in the Gummer (0 .1 :^ % ) and fall (0 .09 % ) , and highest in the winter (0 .17 % ) and spring (0 -20 % ) due to wheat /rye intake in the latter two seasons . Digestible energy was probably adequate for growth and moderate production (1949 kcal /kg annual average ) in all seasons except summer . Low DE and P levels in the fall diet could have some influence on breeding success .
URI: http : / /hdl .handle .net /2346 /19831
Date: 1981-08

Citation

Nutritional Quality of Mule Deer Diets in the Texas Panhandle. Master's thesis, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /19831 .

Files in this item

Files Size Format View
31295002678430.pdf 3.163Mb application/pdf View/Open

This item appears in the following Collection(s)

Show full item record

Search DSpace

Advanced Search

Browse