When prey acts as a lever: prey-handling behavior of the Chinese green tree viper, Trimeresurus stejnegeri stejnegeri (Viperidae: Crotalinae)

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題When prey acts as a lever: prey-handling behavior of the Chinese green tree viper, Trimeresurus stejnegeri stejnegeri (Viperidae: Crotalinae)
出版類型SCI(Sciences Citation Index)
出版年度2007
AuthorsTein-Shun Tsai, 蔡添順
開始頁631
頁數6
出版日期2007 / 12
其他編號0000
中文摘要

When prey acts as a lever: prey-handling behavior of the Chinese green tree viper, Trimeresurus stejnegeri stejnegeri (Viperidae: Crotalinae). Zoological Studies 46(5): 631-637. Snakes may use tongue flicking and snout touching to locate the head-end of immobilized prey, but tongue use is limited when snakes are holding prey after a strike. In this condition, how can they differentiate the anterior and posterior ends of the prey so that they still ingest their prey mainly from the anterior end? To answer the question, I analyzed the prey-handling behavior of Trimeresurus stejnegeri steinegeri (Viperidae: Crotalinae) in the laboratory. Following the capture of a prey, T. s. stejnegeri lifted the prey from the ground. The prey thus hung in the air, with the body tilted, like a lever with the fulcrum at the site of the bite. In most cases, the snake gradually maneuvered its jaw to the higher end of the prey and began ingesting it. As an adaptation for arboreal feeding, the direction of prey ingestion in T. s. stejnegeri depended largely on the location of the initial bite site, under the proposed action of gravity. A significantly greater proportion of frogs (42.1%) were struck in the posterior region than mice (9.6%). The ratio of prey ingested from the anterior to the posterior ends was 54: 19 for mice and 24: 14 for frogs.

期刊名稱Zoological Studies
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