喀斯特灌丛草地武雪山羊的觅食行为与喜食性

在湘西典型喀斯特灌从草地环境条件下,对武雪山羊的觅食行为与喜食性进行了分析。结果表明,武雪山羊各行为所占的时间长短依次为采食〉游走〉卧息反趋〉站立〉饮水。除站立时间外,其它行为时间分配在上、中、下午有明显的差异（P〈0．05）。其中采食时间曲线呈“V”字形变动,卧息反刍时间曲线呈抛物线型变动。游走时间上午明显低于中午与下午,而饮水时间下午明显高于上午与中午。武雪山羊偏向于取食小构树（Broussonetia kazinoki）、马棘（Indigfera psendotictoria）、忍冬（Lonicera japonica）等,且山羊对木本与藤本植物的喜食程度高于草本植物。山羊所采食的植物大部分为喜食种类,但由于各种植物的分布状况与可获得性不同,主要食物并非全部由喜食种类组成。

Foraging behavior and dietary preference of Wuxue goats on karst shrubby grassland of West Hunan

The study on the foraging behavior and dietary preference of Wuxue goats on karst shrubby grassland of West Hunan Province showed that the duration of different foraging behaviors was in the order of ingestion>wandering>resting and rumination>standing>drinking.The foraging behaviors except standing were significantly different in their durations before noon,at noon,and after noon,e.g.,ingestion presented a "V" curve,while resting and rumination presented a parabola.The duration of wandering was significantly longer before noon than at noon and after noon,and that of drinking was significantly longer after noon than before noon and at noon.Wuxue goats preferred to ingest Broussonetia kazinoki, Indigfera psendotictria and Lonicera japonica,etc.,and more preference was to wood plants and lianas than to herbs.The majority of the plants that Wuxue goats ingested were the preference species,but the main food of the goats was not always the preferred plants due to the different distribution and availability of the plants.