Proceedings: Animal Sciences

, Volume 91, Issue 5, pp 439–450 | Cite as

Structure and seasonal changes in the testes of a freshwater crab,Potamon koolooense (Rathbun)

  • P C Joshi
  • S S Khanna


The paired ‘H’-shaped testes ofPotamon koolooense show histomorphological changes during various stages of maturity. Seminiferous tubules show different stages of spermatogenesis. A few undifferentiated or resting spermatogonia supply a new crop of germ cells for the next breeding season. In a tubule the meiotic divisions occur more or less synchronously in all the primary or secondary spermatocytes. Sperm consists of a head and mitochondrial vesicle which encloses axial filament and distal centrosome. Spermatogenesis activity is seasonal. Spermatogenesis begins in January-February, progresses slowly through March, reaching its peak in April-May. However, all the tubules do not mature simultaneously. Spermiation occurs during May and June, the spermatogenesis ceases gradually, and by December the testes enter a brief period of rest.


Potamon koolooense testes histology seasonal changes 


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Copyright information

© Indian Academy of Sciences 1982

Authors and Affiliations

  • P C Joshi
    • 1
  • S S Khanna
    • 2
  1. 1.Department of ZoologyGovernment PG CollegePithoragarhIndia
  2. 2.Ministry of EducationLucknowIndia

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