PATTERNS OF RESOURCE USE, FOOD QUALITY, AND HEALTH-STATUS OF VOLES (MICROTUS-PENNSYLVANICUS) TRAPPED FROM FLUCTUATING POPULATIONS
PATTERNS OF RESOURCE USE, FOOD QUALITY, AND HEALTH-STATUS OF VOLES (MICROTUS-PENNSYLVANICUS) TRAPPED FROM FLUCTUATING POPULATIONS
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DOI：
10.1007/bf00384309
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发表时间：
1989-01-01
期刊：
影响因子：
2.7
通讯作者：
JODOIN, L
中科院分区：
文献类型：
--
作者：
BERGERON, JM;JODOIN, L
最近的研究表明，饮食质量是负责不同的存活率的田鼠群体（Boonstra和Boag 1987）和间隔行为的女性（Ims 1987）。这些现象与缺少或降低了首选食物的质量有关。为了验证这一假设，我们比较了高和低种群密度阶段的草甸田鼠（Microtus pennaculicus）的食物习惯，食物质量和健康状况。在这项研究中，七种植物代表的主要食物项目定期使用和生物量值的首选物种的浏览压力下降。此外，主要饮食项目的食物质量在不同阶段之间发生变化，迫使雌性相应地调整其喂养策略。田鼠的健康状况发生了变化，这也为人们对高质量食物资源和生存能力的竞争开辟了道路。
Recent studies suggest that diet quality is responsible for differential survivorship of vole cohorts (Boonstra and Boag 1987) and spacing behavior of females (Ims 1987). These phenomena have been related either to a lack of or a deterioration in the quality of the preferred food. To test this hypothesis, we compared food habits, food quality and health status of meadow voles (Microtus pennsylvanicus) from high and low population density phases. In this study, seven plant species represented the main food items used on a regular basis and biomass values of preferred species decreased with browsing pressure. In addition, food quality of the main dietary items changed between phases forcing females to adjust their feeding strategy accordingly. Health of voles changed also opening the way to speculations on competition for high quality food resources and survivorship.