水生专家蛇的捕食行为的个体发育,菱形蛇,在生命的第一年

IF 1.1 2区 生物学 Q3 ZOOLOGY Herpetological Monographs Pub Date : 2000-01-01 DOI:10.2307/1467054
B. A. Savitsky, G. Burghardt
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引用次数: 15

摘要

为了研究新生水蛇(Nerodia rhombifer)的捕食行为,我们进行了两个实验。第一个实验确定了在小的、自然的围栏中,三窝被捕食动物和没有栖息地的幼崽的栖息地使用和捕食行为。第二个实验测试了一窝三岁的蛇,从出生到一岁,在相同的围栏中,以确定栖息地使用和捕食行为的个体发生变化。幼鱼是高度水生的,只在水中觅食。当负浮力时,它们将活动集中在水面上。幼蛇在攻击活鱼方面非常成功,它们会抓住大多数鱼的头部,或者迅速将它们重新调整到头朝前的位置。成虫典型的开口觅食行为仅初步发展。栖息地利用的个体发生变化包括转向密度较低的覆盖和增加开放水域的使用。个体发生的行为变化包括水下活动的增加和水面活动的减少,更高的攻击率和更短的处理时间,尽管蛇捕获的鱼较少。年末,成虫的觅食行为有所发展,但与成虫相比仍有所缩短。实地研究证实了这些研究的结果。
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Ontogeny of predatory behavior in the aquatic specialist snake, Nerodia rhombifer, during the first year of life
We conducted two laboratory experiments in order to examine the predatory behavior of neonatal water snakes, Nerodia rhombifer. The first experiment determined habitat use and predatory behavior in three litters of preyand habitat-naive neonates in small, naturalistic enclosures. The second experiment tested one litter of snakes at three ages from birth to one year in the same enclosures in order to determine ontogenetic changes in habitat use and predatory behavior. The neonates were highly aquatic, foraging only while in water. While negatively buoyant, they focused their activity at the surface of the water. Neonatal snakes were very successful at attacking live fish, capturing most by the head or repositioning them rapidly to a head-first position. The open-mouthed (OM) foraging behavior typical of adults was only rudimentarily developed. Ontogenetic changes in habitat use included a shift to less dense cover and increased use of open water. Ontogenetic changes in behavior included increased underwater activity and decreased surface activity, a higher rate of attacking, and shorter handling times, although snakes captured fewer fish by the head. OM foraging behavior developed, but was still abbreviated as compared to adults at the end of the year. Field studies corroborate the results of these studies.
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来源期刊
Herpetological Monographs
Herpetological Monographs 生物-动物学
CiteScore
5.40
自引率
0.00%
发文量
2
审稿时长
>12 weeks
期刊介绍: Since 1982, Herpetological Monographs has been dedicated to original research about the biology, diversity, systematics and evolution of amphibians and reptiles. Herpetological Monographs is published annually as a supplement to Herpetologica and contains long research papers, manuscripts and special symposia that synthesize the latest scientific discoveries.
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