Field Studies of Butterflies: A Trial for the Establishment of Indices to Evaluate the Seasonal Fluctuations and the Ecological States of Forests in Bangladesh

Authors

  • Reza M Shahjahan Institute of Food and Radiation Biology, Dhaka-1000
  • M Abdur Razzak Institute of Food and Radiation Biology, Dhaka-1000
  • ATM Fayezul Islam Institute of Food and Radiation Biology, Dhaka-1000
  • ASM Saifullah Institute of Food and Radiation Biology, Dhaka-1000
  • A Yamanaka Department of Physics, Biology and Informatics, Faculty of Science, Yamaguchi University, Yamaguchi 753
  • M Inoue Department of Physics, Biology and Informatics, Faculty of Science, Yamaguchi University, Yamaguchi 753
  • K Endo Department of Physics, Biology and Informatics, Faculty of Science, Yamaguchi University, Yamaguchi 753

Keywords:

Butterfly, seasonal fluctuation, population indices, ecological states

Abstract

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

Abstract
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Author Biography

Reza M Shahjahan, Institute of Food and Radiation Biology, Dhaka-1000

Department of Zoology, Faculty of Science, University of Dhaka, Dhaka 1000
Cover of UJZRU Vol.27

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How to Cite

Field Studies of Butterflies: A Trial for the Establishment of Indices to Evaluate the Seasonal Fluctuations and the Ecological States of Forests in Bangladesh. (2009). University Journal of Zoology, Rajshahi University, 27, 67-71. https://doi.org/10.3329/ujzru.v27i0.1958

Issue

Vol. 27 (2008)

Section

Articles

How to Cite

Field Studies of Butterflies: A Trial for the Establishment of Indices to Evaluate the Seasonal Fluctuations and the Ecological States of Forests in Bangladesh. (2009). University Journal of Zoology, Rajshahi University, 27, 67-71. https://doi.org/10.3329/ujzru.v27i0.1958