洞庭湖区黑线姬鼠食性调查

于2009年4月至2011年6月,在洞庭湖区湖滩、滨湖农田、防洪堤坝3种生境中捕捉黑线姬鼠(Apodemus agrarius)223只,观察胃内容物,分析了洞庭湖区黑线姬鼠的食性。结果表明:洞庭湖区3种生境中黑线姬鼠的食物组成都以植物种子为主,总计达(66.55±2.37)%,其次为植物茎、叶,其比例为(19.01±2.13)%,植物根所占比例为(8.27±1.05)%,动物性食物为(6.05±0.97)%。但黑线姬鼠的食物组成会随着不同生境、季节而有一定的变化。种子资源相对较少的季节和生境,相应的黑线姬鼠的食物组成中的种子所占比例就会较低。同一生境中,幼年鼠和亚成年鼠的食物组成与成年鼠、老年鼠区别较大,孕期雌鼠与同季节、同生境的非孕期雌鼠相比也有较大差异。说明尽管黑线姬鼠以取食植物种子为主,但其食性会随着生境可获得资源的不同而有所调整。

Dietary Habit of Apodemus agrarius in Dongting Lake Area

In order to understand the dietary habit of Apodemus agrarius which inhabited Dongting Lake area,stomach contents of 223 samples were observed under anatomical lens.Samples were collected from three different habitats:lake beach,farmland and flood control dike.The results showed that the food composition of A.agrarius was seeds (66.55±2.37)%,leaves and stems (19.01±2.13)%,roots of herbaceous plants (8.27±1.05)% and invertebrates (6.05±0.97)%.The diet of the animals was variable in different habitats and seasons,the proportion of seeds in its diet was lower when there was less seeds supply.The food composition between juniors and adults and between pregnant and non-pregnant females were significantly different in the same habitat and season.The results indicated that the animals could adjust their diet in different habitats and physiological periods.