R. Shahjahan, M. Razzak, A. Islam, A. Saifullah, A. Yamanaka, Moeko Inoue, K. Endo
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引用次数: 3
摘要
为了建立评价孟加拉国森林生态状况的指标,在5个观测点共统计到蝴蝶27805只(10科76种)。蝴蝶数量和种类在4月和11 - 12月呈双峰型季节性波动。I(R5)值在1 - 2月和7 - 9月也呈现双峰型季节性波动。IND/I(R5)比值在11月形成一个大峰。结果表明:3 ~ 7月蝴蝶种类多样性呈下降趋势,11月蝴蝶数量呈上升趋势;关键词:蝴蝶,季节消长,种群指数,生态状态Â doi:10.3329/ujzru.v27i0.1958Rajshahi university . Vol. 27, 2008 pp. 67-71
Field Studies of Butterflies: A Trial for the Establishment of Indices to Evaluate the Seasonal Fluctuations and the Ecological States of Forests in Bangladesh
To establish the indices evaluating the ecological conditions of forests in Bangladesh, total number of butterflies counted in 5 observation sites reached 27,805 (76 species, 10 families). Number of butterflies (IND) and species showed bimodal pattern of seasonal fluctuations peaked in April and November-to- December. The values of I(R5) also showed bimodal seasonal fluctuations peaked in January-to-February and July-to-September. The ratios of IND/I(R5) formed a large peak in November. Results indicate that species diversities of butterflies high in March-to-July decreased thereafter, the numbers of butterflies increased toward November in the study area. Key words : Butterfly, seasonal fluctuation, population indices, ecological states  doi:10.3329/ujzru.v27i0.1958 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 67-71