Life‐history differences across latitude in common side‐blotched lizards ( Uta stansburiana )
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چکیده
منابع مشابه
Corticosterone, locomotor performance, and metabolism in side-blotched lizards (Uta stansburiana).
Elevated levels of circulating corticosterone commonly occur in response to stressors in wild vertebrates. A rise in corticosterone, usually in animals of subordinate rank, results in a variety of effects on behavior and physiology. Behavioral and physiological responses to short-term increases in corticosterone are well studied. In contrast, the effects of chronic elevated levels of corticoste...
متن کاملIncreased Testosterone Decreases Medial Cortical Volume and Neurogenesis in Territorial Side-Blotched Lizards (Uta stansburiana)
Variation in an animal's spatial environment can induce variation in the hippocampus, an area of the brain involved in spatial cognitive processing. Specifically, increased spatial area use is correlated with increased hippocampal attributes, such as volume and neurogenesis. In the side-blotched lizard (Uta stansburiana), males demonstrate alternative reproductive tactics and are either territo...
متن کاملGlycogen, not dehydration or lipids, limits winter survival of side-blotched lizards (Uta stansburiana).
Climate change is causing winters to become milder (less cold and shorter). Recent studies of overwintering ectotherms have suggested that warmer winters increase metabolism and decrease winter survival and subsequent fecundity. Energetic constraints (insufficient energy stores) have been hypothesized as the cause of winter mortality but have not been tested explicitly. Thus, alternative source...
متن کاملMorphology of the spermatozoa of the iguanian lizards Uta stansburiana and Urosaurus ornatus (Squamata, Phrynosomatidae).
The spermatozoa of Uta stansburiana and Urosaurus ornatus show the following squamate autapomorphies: a single perforatorium extending anteriorly from the apical tip of the paracrystalline subacrosomal cone; the presence of an epinuclear electron lucent region; intermitochondrial dense bodies; and the fibrous sheath extending into the midpiece. The acrosome vesicle is flattened and concentrical...
متن کاملAnalysis of Carbon and Nitrogen Stable Isotope Levels in Side-blotched Lizards ( Uta stansburiana ) Fed Varying Diets
When attempting to determine the diet of wild animals, a limited number of techniques currently exist. Often, biologists look at the stomach contents or feces of an animal, if they cannot observe what it is eating directly. However, these techniques often cannot be used with reptiles because they may not eat often or may have an empty stomach when the contents of their stomach are examined. Man...
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ژورنال
عنوان ژورنال: Ecology and Evolution
سال: 2019
ISSN: 2045-7758,2045-7758
DOI: 10.1002/ece3.5157