Evaluation of Stored Body Fat in Nuisance-Killed Japanese Black Bears (Ursus Thibetanus Japonicus)
Evaluation of Stored Body Fat in Nuisance-Killed Japanese Black Bears (Ursus Thibetanus Japonicus)
复制标题
被误杀的日本黑熊 (Ursus Thibetanus Japonicus) 体内储存脂肪的评估
DOI：
10.2108/zsj.28.105
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发表时间：
2011
期刊：
影响因子：
64.8
通讯作者：
T. Tsubota
中科院分区：
文献类型：
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作者：
Atsushi Yamanaka;M. Asano;Masatsugu Suzuki;T. Mizoguchi;T. Oi;Michito Shimozuru;T. Tsubota
我们评估了2005-2007年间在日本岐阜县和福岛县被捕杀的日本黑熊(Ursus Thibetanus Japan Onicus)体内储存的脂肪。采用股骨骨髓脂肪(FMF)、改良肾脂肪指数(MKFI)和腹部皮下脂肪(ASF)作为定量评价指标。我们考察了这些指标的基本特征，如季节性、年龄和性别依赖性，以及它们之间的数量关系。MKFI和ASF在登宁期开始时(12月)有所增加，而FMF在整个采样期(7月至12月)相对稳定。在幼崽中，所有指数都明显低于年龄较大的年龄组。FMF和MKFI之间似乎存在分解顺序，而MKFI和ASF之间则不存在。我们还评估了这些指标的年变化，并讨论了其与熊入侵人类居民区的发生率的相关性。2006年夏季(7月至9月)被捕杀的熊的体内脂肪储存量明显高于2007年夏季被捕杀的熊，尽管2006年的滋扰捕杀数量比2007年多。这表明糟糕的营养状况并不是熊入侵的直接原因。
We evaluated the stored body fat of Japanese black bears (Ursus thibetanus japonicus) killed as nuisances in Gifu and Fukushima prefectures, Japan, during 2005–2007. We employed femur marrow fat (FMF), modified kidney fat index (mKFI), and abdominal subcutaneous fat (ASF) as indices for quantitative evaluation. We examined the basic characteristics of these indices, such as seasonality, age and sex dependency, and the quantitative relationship among them. mKFI and ASF increased towards the beginning of the denning period (December), while FMF was relatively stable throughout the sampling period (July–December). In cubs, all indices showed significantly lower values than in the older age classes. There seemed to be a catabolizing order between FMF and mKFI, but not between mKFI and ASF. We also evaluated the yearly change in the indices, and discussed its relevance to the incidence of bear intrusion into human residential areas. Bears nuisance-killed in summer (July–September) 2006 had a significantly larger amount of stored body fat than those killed in summer 2007, although the number of nuisance kills was larger in 2006 than in 2007. This suggests that poor nutritional condition is not a direct cause of bear intrusion.