Effect of Resource Supplementation on Female Western Rattlesnake Postpartum Movement

IF 1 4区 生物学 Q3 ZOOLOGY
D. M. Eye, Jade A. Spruyt, Marcus C.P. Atkins, Christine A. Bishop, Karl W. Larsen
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引用次数: 0

Abstract

Resource availability plays an important factor in an animal’s life history by affecting growth and reproduction and influencing behaviours such as movement and thermoregulation. Female rattlesnakes in northern climes face shortened active seasons limiting the time available to replenish lost reserves from reproduction. Consequently, this leads to slower growth rates, small litters, and infrequent reproduction in these populations. With these challenges, it has been assumed postpartum rattlesnakes in these regions should return to their hibernacula immediately following parturition. However, our previous study revealed different tactics of postpartum movements by females across several study sites. To examine the relationship between resource availability and these movements, we experimentally supplemented resources (mice or mice injected with water) to free-ranging pregnant Western Rattlesnakes (Crotalus oreganus, Holbrook 1840) at three sites in British Columbia, Canada, during 2019. We examined body condition and movement of snakes, finding that pregnant rattlesnakes consumed supplemented resources until late parturition and had significantly higher postpartum body condition than controls. Contrary to our expectations, increased access to resources ad libitum did not significantly halt or alter postpartum movements away from hibernacula. These results suggest resource availability influences certain life-history traits such as body condition but not others like postpartum movement.
资源补充对雌性西部响尾蛇产后运动的影响
资源供应是动物生活史中的一个重要因素,它会影响动物的生长和繁殖,并影响动物的运动和体温调节等行为。北方地区的雌性响尾蛇面临着活动季节缩短的问题,这限制了它们补充繁殖损失的储备的时间。因此,这导致这些种群的生长速度减慢、产仔数少、繁殖频率低。面对这些挑战,人们认为这些地区的产后响尾蛇应该在分娩后立即返回冬眠地。然而,我们之前的研究发现,在几个研究地点,雌性响尾蛇产后的行动策略各不相同。为了研究资源可用性与这些运动之间的关系,2019 年期间,我们在加拿大不列颠哥伦比亚省的三个地点为自由活动的怀孕西部响尾蛇(Crotalus oreganus, Holbrook 1840)试验性地补充了资源(小鼠或注射了水的小鼠)。我们检查了响尾蛇的身体状况和运动情况,发现怀孕的响尾蛇在产后期之前一直消耗补充的资源,产后的身体状况明显高于对照组。与我们的预期相反,增加自由获取资源的机会并没有明显阻止或改变产后离开冬眠穴的运动。这些结果表明,资源供应会影响某些生命史特征,如身体状况,但不会影响其他特征,如产后运动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Canadian Journal of Zoology
Canadian Journal of Zoology 生物-动物学
CiteScore
2.40
自引率
0.00%
发文量
82
审稿时长
3 months
期刊介绍: Published since 1929, the Canadian Journal of Zoology is a monthly journal that reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
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