Proceedings: Animal Sciences

, Volume 97, Issue 3, pp 239–250 | Cite as

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

  • S K Sahu
  • S K Mishra
  • B K Senapati


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.


Dichogaster bolaui unimodality bimodality reproductive strategy life cycle vertical stratification 


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Copyright information

© Indian Academy of Sciences 1988

Authors and Affiliations

  • S K Sahu
    • 1
  • S K Mishra
    • 1
  • B K Senapati
    • 1
  1. 1.Environmental Biology Section, School of Life SciencesSambalpur UniversityJyoti ViharIndia

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