不同色型棕背伯劳的冬季家域对比研究

Comparison of Home Range between Different Color Morphs of Lanius schach in Winter

棕背伯劳Laniusschach具有典型的羽色多态现象。于2008年11月14日至12月24日,采用野外直接观察法,利用GPS存取地理坐标点信息,对广东海丰鸟类自然保护区公平保护站黑、棕两种色型棕背伯劳家域进行对比研究,所得数据利用Arcview3.2和SPSS13.0软件技术分析,以探讨不同色型间在家域行为的差异。结果表明:(1)黑、棕两种色型棕背伯劳家域的平均面积分别为11270.96m^2±1807.72m^2、13425.83m^2±3038.82m^2,两者之间无显著差异(P>0.05);(2)被调查个体的家域形状均不规则,相邻家域间的重叠幅度均<1%;(3)不同色型棕背伯劳日平均活动时间区间和时间长度无显著差异(P>0.05)。据此认为,棕背伯劳两种色型在家域行为上未表现出明显的分化。

Lanius schach is a representative species with color polymorphism. During the period between November and December in 2008, the home ranges of Lanius schach, containing black morphs and brown morphs, were studied using a GPS in Gongping site of the Haifeng Avian Nature Reserve, Guangdong Province. The data were analyzed with Arcview3.2 and SPSS13.0. The results showed： 1 ） The difference in home range size between the black morph and brown morph was not significant with an average of 11270.96 m2± 1807.72 m2 and 13425.83 m2±3038.82 m2 respectively. 2） The shapes of the home ranges of the two morphs were both irregular and few overlaps occurred between neighbors （ 〈 1% ）. 3 ） There were no significant differences in the mean daily activity time of the two morphs （ P 〉 0.05 ）. Hence, we concluded that there was no obvious deviation between the home range characteristics in the two color morphs.