Proceedings: Animal Sciences

, Volume 92, Issue 6, pp 415–422 | Cite as

Condition and relative condition cycles in the tropical glassy perchletChanda (=Ambassis)commersonii(Cuv. and Val.) (Pisces: Centropomidae)

  • J Rajasekharan Nair
  • N Balakrishnan Nair
  • N K Balasubramanian


The seasonal condition (K) and relative condition (K n ) cycles and their changes with the growth of the fishChanda commersonii (Cuv. and Val.) for 2 yrs are presented. BetterK is shown by the smaller immature and first maturity stages and larger, almost senile groups but they show aK n factor below ‘1’. The actively breeding adults show a uniform fail inK but they give comparatively highK n values (above ‘1’). These changes inK andK n with the growth of the fish are clearly reflected in their seasonal cycles also.K cycle would thus appear to follow a pattern of build up and loss of body resources, indirectly following the breeding cycle while theK n cycle follow the breeding and feeding cycles directly, as shown by their seasonal changes and changes with growth of the fish for 2 yrs. Since only minor deviations from unity occur inK n factor it furnishes a more sensitive index of somatic difference between age groups, of breeding season and feeding cycle.


Condition factor relative condition factor breeding cycle feeding cycle maturity stages Chanda commersonii 


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Copyright information

© Indian Academy of Sciences 1983

Authors and Affiliations

  • J Rajasekharan Nair
    • 1
  • N Balakrishnan Nair
    • 1
  • N K Balasubramanian
    • 1
  1. 1.Department of Aquatic Biology and FisheriesUniversity of KeralaTrivandrumIndia

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