Estimation of food intake and ingested energy in Daubenton's bats (Myotis daubentonii) during pregnancy and spermatogenesis
Estimation of food intake and ingested energy in Daubenton's bats (Myotis daubentonii) during pregnancy and spermatogenesis
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DOI：
10.1007/s10344-006-0046-2
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发表时间：
2006-12-01
影响因子：
2
通讯作者：
Dietz, Markus
中科院分区：
文献类型：
--
作者：
Encarnacao, Jorge A.;Dietz, Markus
我们研究了8年（1996年至2003年）德国中部雌性和雄性Daubentonii在怀孕期间（5月1日、8日至6月4日期间）和强烈精子发生活动期间（7月2日、24日至8月22日期间）的食物摄入量并估计摄入的能量。我们使用无线电遥测技术来确定花费在觅食上的时间，并用荧光棒标记动物来确定猎物的攻击率。体长，体质量，水分含量，和热量的摇蚊，Dauphon的蝙蝠的主要猎物，测量估计夜间的食物摄入量，因此，能量摄入量。怀孕的女性花了更多的时间比男性觅食期间，我和女性在哺乳期后。与此相反，男性觅食时间最长的spennatogenetic活动期间比晚春，也显着长于后哺乳期的女性。基于平均每分钟8.3次猎物攻击，觅食所花费的时间，以及捕获成功率为50%或92%，计算出的摄入值与7.6昆虫每分钟的进食率（=92%捕获成功率）更符合文献数据的其他食虫蝙蝠比捕获成功率为50%的基础上计算的值。在高捕获成功率模型中，计算出的雌性蝙蝠的昆虫摄入量在怀孕期间为8.0克，在哺乳期后每天为4.9克，每天每克体重提供5.0和3.0千焦的摄入能量。雄蝙蝠在春末和精生高峰期的日摄食量分别为3.6克和8.0克，每克体重分别提供2.6和5.7 U的能量。
We studied food intake of and estimated ingested energy in female and male Myotis daubentonii during the periods of pregnancy (period 1, 8 May-4 June) and of intense spermatogenetic activity (period 2, 24 July-22 August) over 8 years (1996-2003) in central Germany. We used radiotelemetry to determine the time spent foraging and marked animals with chemiluminescent light-sticks to determine prey attack rates. Body length, body mass, moisture content, and caloric content of chironomids, the main prey of Daubenton's bats, were measured to estimate the nightly food intake and, in consequence, energy intake. Pregnant females spent significantly more time foraging than males during period I and females during the post-lactation period. In contrast, male foraged longer during the period of highest spennatogenetic activity than during late spring and also significantly longer than post-lactating females. Based on a mean number of 8.3 prey attacks per minute, the time spent foraging, and a capture success rate of either 50 or 92%, calculated intake values with a feeding rate of 7.6 insects per minute (=92% capture success) were more consistent with literature data for other insectivorous bats than that of values calculated on the basis of a capture success rate of 50%. In the high capture-success model, calculated insect intake of female bats was 8.0 g during pregnancy and 4.9 g per day during post-lactation, providing 5.0 and 3.0 kJ of ingested energy per gram body mass per day. Calculated intake of male bats was 3.6 g insects per day during late spring and 8.0 g during period of intensive spermatogenesis, providing 2.6 and 5.7 U of ingested energy per gram body mass.