The predatory strike behavior of two species of hatchling poisonous snakes, Deinagkistrodon acutus and Naja atra Allopatric Captive Rearing in the Tropics Increases the Growth Rates of Deinagkistrodon acutus Snakelets Extraction, purification and identification of type Ⅱ collagen from Agkistrodon acutus Relationships among female body size, clutch size, and egg size in captive Deinagkistrodon acutus