The benefit and strategy of spring movements in Mongolian gazelles
The benefit and strategy of spring movements in Mongolian gazelles
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黄羊春季运动的效益及对策
DOI：
10.1093/jmammal/gyz209
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发表时间：
2020
影响因子：
1.7
通讯作者：
Lhagvasuren Badamjav
中科院分区：
文献类型：
--
作者：
Imai Shunsuke;Ito Takehiko Y;Shinoda Masato;Tsunekawa Atsushi;Lhagvasuren Badamjav
在环境条件的时间可预测性较低的地区，动物的流动预计将是游牧式的，但目前尚不清楚游牧式流动的成本是否超过所获得的收益。为了研究蒙古瞪羚（Procapra gutturosa）在蒙古的春季运动策略，植被条件的可预测性相对较低，我们确定了每次运动的类型，评估了瞪羚的首选植被条件，并量化了通过每次春季运动所取得的效益。从5月到7月，被调查的瞪羚持续偏好具有中等归一化差异植被指数（NDVI）值的区域，并且偏好区域分布的时空变化解释了许多瞪羚在春季的长距离移动。三种运动类型，久坐，线性和游牧运动，被确定。在线性和游牧运动类型之间，个人之间利益差异最大的时期不同。在春季运动期间，游牧运动类型的收益方差较大，而在夏季，直线运动类型的收益方差较大，表明蒙古原羚存在不同的运动策略。在线性运动类型中，短时间内的线性长距离运动表明所谓的跳跃策略，而其他运动模式可能代表跳跃策略。两种策略中个体迁移的利益损失表明研究区植被状况的年际可预测性较低，这可以解释蒙古原羚春季多种迁移类型或策略的共存。
Animal movement is predicted to be nomadic in areas with low temporal predictability of environmental conditions, but it remains unclear whether the costs of nomadic movement outweigh the benefits received. To examine the spring movement strategy of Mongolian gazelles (Procapra gutturosa) in Mongolia, where predictability of vegetation conditions is relatively low, we identified the type of each movement, evaluated the preferred vegetation conditions for gazelles, and quantified the benefit achieved through each spring movement. The surveyed gazelles continuously preferred areas with intermediate normalized difference vegetation index (NDVI) values from May to July, and spatial and temporal shifts of the distribution of preferred areas explain the long-distance movements of many gazelles in spring. Three movement types, sedentary, linear, and nomadic movement, were identified. The period when benefit varied most greatly among individuals differed between the linear and nomadic movement types. During the spring movement period, the variance of benefit was larger for the nomadic movement type, whereas during the summer it was larger for the linear movement type, suggesting the existence of different movement strategies in the Mongolian gazelle. Linear long-distance movements over a short period in the linear movement type suggest the so-called jumper strategy, whereas other movement patterns might represent the searcher strategy. Benefit loss through movements of individuals in both strategies indicate low interannual predictability of vegetation conditions in the study area, and it would explain the co-existence of multiple movement types or strategies used by Mongolian gazelles in spring.
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影响因子：
2.9
作者：
Bischof, Richard;Loe, Leif Egil;Mysterud, Atle
通讯作者：
Mysterud, Atle
影响因子：
6.3
作者：
Ito, TY;Miura, N;Jiang, ZW
通讯作者：
Jiang, ZW
影响因子：
3.4
作者：
Chapman, Ben B.;Bronmark, Christer;Hansson, Lars-Anders
通讯作者：
Hansson, Lars-Anders
影响因子：
1.6
作者：
Takehiko Y. Ito;Yu-ki Sakamoto;B. Lhagvasuren;T. Kinugasa;M. Shinoda
通讯作者：
Takehiko Y. Ito;Yu-ki Sakamoto;B. Lhagvasuren;T. Kinugasa;M. Shinoda
影响因子：
6.1
作者：
Hopcraft, J. Grant C.;Morales, J. M.;Haydon, Daniel T.
通讯作者：
Haydon, Daniel T.