• Population biology and reproductive strategy ofDichogaster bolaui (Oligochaeta: Octochaetidae) in two tropical agroecosystems

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/anml/097/03/0239-0250

    • Keywords

       

      Dichogaster bolaui ; unimodality; bimodality; reproductive strategy; life cycle; vertical stratification

    • Abstract

       

      Comparative biology of the wormDichogaster bolaui (Michaelsen) in a pasture and compost pit has been reported. Important findings are: (i) restriction of more than 84% ofDichogaster bolaui population to upper 10 cm of the soil depth indicating surface living habit; (ii) attainment of a peak population of 12617 worms/m2; (iii) a zero population during summer revealing environmental drasticity (soil temperature > 31°C, soil moisture < 1 g%) and yearly recolonisation of worms; (iv) habitat variation in the reproductive strategy with an unimodality in pasture and bimodality in compost pit; and (v) preemergence of juveniles followed by post cocoon peak indicating population survival through cocoons during summer.

    • Author Affiliations

       

      S K Sahu1 S K Mishra1 B K Senapati1

      1. Environmental Biology Section, School of Life Sciences, Sambalpur University, Jyoti Vihar, Orissa - 768 019, India
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