Repeatability of Maximal Aerobic Performance in Belding's Ground Squirrels, Spermophilus beldingi
نویسندگان
چکیده
منابع مشابه
Early auditory experience and the ontogeny of alarm-call discrimination in Belding's ground squirrels (Spermophilus beldingi).
Because young ground squirrels are vulnerable to predation, selection would favor the early ability to respond to alarm calls. This requires discrimination of classes of alarm calls from each other as well as from non-alarm calls. Pre-emergent auditory experience may influence the development of discrimination. As a means of determining when Belding's ground squirrels (Spermophilus beldingi) ca...
متن کاملDevelopmental and geographic variation in stress hormones in wild Belding's ground squirrels (Spermophilus beldingi).
Extensive research has been conducted on the role of glucocorticoids in regulating growth, mobilizing energy, responding to stressors and modulating learning and memory. However, little is known about the production of corticoids during early development in free-living animals, particularly during sensitive periods of acquisition of important behaviors. In a four-year study of Belding's ground ...
متن کاملBile constituents in hibernating golden-mantled ground squirrels (Spermophilus lateralis)
BACKGROUND Golden-mantled ground squirrels (S. lateralis) are anorexic during the winter and survive by exploiting hibernation to reduce energetic demands. The liver normally plays a critical role in fueling and regulating metabolism and one might expect significant changes in hepatobiliary function with hibernation. We analyzed bile collected from animals in summer, animals in winter that were...
متن کاملThe Effects of Livestock on California Ground Squirrels (Spermophilus beecheyii )
Understanding the impacts of livestock grazing on wildlands is important for making appropriate ecosystem management decisions. Using livestock exclosures, we examined the effects of moderate cattle grazing on the abundance of California ground squirrels (Spermophilus beecheyii Richardson) and the spatial distribution of active burrows within their colonies in grassland and blue oak (Quercus do...
متن کاملSciurid phylogeny and the paraphyly of Holarctic ground squirrels (Spermophilus).
The squirrel family, Sciuridae, is one of the largest and most widely dispersed families of mammals. In spite of the wide distribution and conspicuousness of this group, phylogenetic relationships remain poorly understood. We used DNA sequence data from the mitochondrial cytochrome b gene of 114 species in 21 genera to infer phylogenetic relationships among sciurids based on maximum parsimony a...
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ژورنال
عنوان ژورنال: Functional Ecology
سال: 1995
ISSN: 0269-8463
DOI: 10.2307/2390015