Evaluation of pocket gopher diet in a perennial productive area
نویسندگان
چکیده
The desert pocket gopher (Geomys arenarius) is a fossorial herbivorous rodent of the family Geomyidae. Its distribution range restricted to New Mexico and Texas, in United States America, northern Chihuahua, México. Médanos de Samalayuca Flora Fauna Protection Area (MSFFPA) located Chihuahua. Different economic activities are carried out this region, mainly irrigated crops pecans (Carya illinoinensis). Populations G. arenarius have been recorded within these areas. Therefore, objective work was define extent trophic niche changes physical condition ranch MSFFPA over three contrasting seasons (dry, wet, post-wet). Forty specimens were collected from Arantxa Ranch. Morphometric measurements weight individuals recorded, digestive tract removed prepare histological slides. Seven 25 m²-quadrants established, species vegetation cover for reference. Seasonal Fitness Index (IK) Levin’s Niche Breadth calculated. Males had higher average than females. IK 2.82 ± 0.47 males 2.64 0.61 Significant differences between only found correlation plant strong diet comprised Physalis hederifolia, Dimorphocarpa wislizeni, Cenchrus incertus. index showed that specialist rodent. Sexual dimorphism evident, with larger gophers influenced by resource availability. In other studies, parameter has related food It reported tend feed on crops; however, pecan cultivation not major element gopher, as it feeds associated crops. Gophers considered generalists; nonetheless, present study specialist, although may be consequence anthropogenic activities.
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ژورنال
عنوان ژورنال: Therya
سال: 2022
ISSN: ['2007-3364']
DOI: https://doi.org/10.12933/therya-22-2244