Movements of Juvenile Bull Sharks in Response to a Major Hurricane Within a Tropical Estuarine Nursery Area
Movements of Juvenile Bull Sharks in Response to a Major Hurricane Within a Tropical Estuarine Nursery Area
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热带河口保育区内幼年牛鲨应对大型飓风的活动
DOI：
10.1007/s12237-019-00600-7
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发表时间：
2019
影响因子：
2.7
通讯作者：
Rehage, Jennifer S.
中科院分区：
文献类型：
--
作者：
Strickland, Bradley A.;Massie, Jordan A.;Viadero, Natasha;Santos, Rolando;Gastrich, Kirk R.;Paz, Valeria;O’Donnell, Patrick;Kroetz, Andrea M.;Ho, David T.;Rehage, Jennifer S.
预测动物对环境变化的反应是生态学的一个基本目标，也是物种保护和管理的必要条件。虽然大多数研究关注的是相对渐进的变化，但极端事件可能对人口产生持久的影响。动物对飓风等重大干扰的反应是寻求庇护、迁徙，或者它们可能无法做出适当的反应。我们使用长期声学遥测监测评估了2017年飓风Irma对佛罗里达沿海大沼泽地苗圃内幼牛鲨（Carcharhinus leucas）行为和生存的影响。我们标记的大多数鲨鱼（n= 14）试图在飓风袭击之前离开鲨鱼河口的浅水区，但个体在行动的时间和成功程度上各不相同。八只牛鲨在飓风来临前几小时或几天内离开了，但有三只提前一周多离开了。11条牛鲨中有9条（约82%）最终在风暴过后的几周或几个月内回到了鱼群中。在这些返回的个体中，有6只在离河口约80公里的近岸水域的不同海岸阵列中被发现。剩下的三条牛鲨相对较晚（在飓风之后）向下游移动，可能已经死亡。我们使用二项广义线性混合模型来估计阵列内存在的概率作为几个环境变量的函数。通过气压下降、压力变化率增加和河段可能的波动来预测偏离阵列。幼年牛鲨在飓风期间和飓风之后做出决定时，可能会权衡多种环境因素、感知到的捕食风险、自身的体型以及猎物资源的转移。
Predicting the responses of animals to environmental changes is a fundamental goal of ecology and is necessary for conservation and management of species. While most studies focus on relatively gradual changes, extreme events may have lasting impacts on populations. Animals respond to major disturbances such as hurricanes by seeking shelter, migrating, or they may fail to respond appropriately. We assessed the effects of Hurricane Irma in 2017 on the behavior and survival of juvenile bull sharks (Carcharhinus leucas) within a nursery of the Florida coastal Everglades using long-term acoustic telemetry monitoring. Most of our tagged sharks (n= 14) attempted to leave the shallow waters of the Shark River Estuary before the hurricane strike, but individuals varied in the timing and success of their movements. Eight bull sharks left within hours or days before the hurricane, but three left more than a week in advance. Nine of 11 bull sharks (~ 82%) eventually returned to the array within weeks or months of the storm. Six of these returning individuals were detected in a different coastal array in nearshore waters ca. 80 km away from the mouth of the estuary during their absence. The remaining three bull sharks moved downstream relatively late (after the hurricane) and may have died. We used binomial generalized linear mixed models to estimate the probability of presence within the array as a function of several environmental variables. Departure from the array was predicted by declining barometric pressure, increasing rate of change in pressure, and potentially fluctuations in river stage. Juvenile bull sharks may weigh multiple environmental cues, perceived predation risk, their own physical size, and shifting prey resources when making decisions during and after hurricanes.
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影响因子：
5.8
作者：
Aaron M. Christ
通讯作者：
Aaron M. Christ
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Castro;D. Peebles
通讯作者：
D. Peebles
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影响因子：
2.5
作者：
M. Pavelka;Keriann C. McGoogan;Travis S. Steffens
通讯作者：
Travis S. Steffens
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
Y. Liu;H. Lillywhite;M. Tu
通讯作者：
M. Tu
大型河口捕食者（Carcharhinus leucas）栖息地利用和运动模式的个体发生生态位变化的个体差异
影响因子：
2.7
作者：
P. Matich;M. Heithaus
通讯作者：
M. Heithaus