干旱区生态环境知识资源中心(Arid): Diet and Feeding Frequency in the Southwestern Speckled Rattlesnake (Crotalus pyrrhus): Ontogenetic, Sexual, Geographic, and Seasonal Variation

Arid

DOI	10.1670/19-144
	Diet and Feeding Frequency in the Southwestern Speckled Rattlesnake (Crotalus pyrrhus): Ontogenetic, Sexual, Geographic, and Seasonal Variation
	Cochran, Chip; Edwards, Katherine L.; Travis, Zachary D.; Pompe, Lance R.; Hayes, William K.
通讯作者	Cochran, C (corresponding author), Loma Linda Univ, Dept Earth & Biol Sci, Loma Linda, CA 92354 USA.
来源期刊	JOURNAL OF HERPETOLOGY
ISSN	0022-1511
EISSN	1937-2418
出版年	2021
卷号	55 期号:1 页码:77-87
英文摘要	Dietary studies are central to our understanding of organismal biology. We describe the diet and frequency of feeding in the Southwestern Speckled Rattlesnake ( Crotalus pyrrhus). We used data from wild-caught specimens collected from six biogeographic regions (pooled to three regions for analysis) across the species' range in the United States that include Arizona, California, and Nevada, USA. Fecal material from 185 snakes yielded 104 prey items from 72 individuals, and palpation indicated recent meal ingestion in 36 of 174 individuals. The diet consisted predominantly of mammals (80.8%), in particular terrestrial squirrels (39.4%) and members of the heteromyid rodent genus Chaetodipus (26.9%). Male and female snakes exhibited similar diets and feeding frequency, but an ontogenetic shift occurred from primarily ectothermic (lizards) to endothermic prey (rodents and birds) and more frequent feeding. Consumption of ectotherms vs. endotherms appeared to be similar among biogeographic regions, but snakes from the Tinajas Altas Mountains, Arizona, preyed disproportionately on birds compared with other regions, and snakes from the Sonoran Desert-Arizona Upland region more frequently ingested recent meals than those from the California-Nevada region. Regardless of sex, size, and biogeographic region, snakes consumed fewer prey during the spring breeding season than during summer and autumn. We provide data on the diet of C. pyrrhus for testing further hypotheses regarding potential interspecific competition, dietary changes associated with climate change, foraging tactics associated with bird predation, competing behaviors during breeding season, and venom composition variation.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000636618300011
WOS类目	Zoology
WOS研究方向	Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350857
作者单位	[Cochran, Chip; Travis, Zachary D.; Pompe, Lance R.; Hayes, William K.] Loma Linda Univ, Dept Earth & Biol Sci, Loma Linda, CA 92354 USA
推荐引用方式 GB/T 7714	Cochran, Chip,Edwards, Katherine L.,Travis, Zachary D.,et al. Diet and Feeding Frequency in the Southwestern Speckled Rattlesnake (Crotalus pyrrhus): Ontogenetic, Sexual, Geographic, and Seasonal Variation[J],2021,55(1):77-87.
APA	Cochran, Chip,Edwards, Katherine L.,Travis, Zachary D.,Pompe, Lance R.,&Hayes, William K..(2021).Diet and Feeding Frequency in the Southwestern Speckled Rattlesnake (Crotalus pyrrhus): Ontogenetic, Sexual, Geographic, and Seasonal Variation.JOURNAL OF HERPETOLOGY,55(1),77-87.
MLA	Cochran, Chip,et al."Diet and Feeding Frequency in the Southwestern Speckled Rattlesnake (Crotalus pyrrhus): Ontogenetic, Sexual, Geographic, and Seasonal Variation".JOURNAL OF HERPETOLOGY 55.1(2021):77-87.