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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
Article
  • 22 Downloads

Abstract

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.

Keywords

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

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References

  1. Craig J F 1977 The body composition of adult perch,Percha fluviatilis in Windermere, with reference to seasonal changes and reproduction;J. Anim. Ecol 46 617–632CrossRefGoogle Scholar
  2. Hickling C F 1945 The seasonal cycle in the cornish pilchard,Sardina pilchardus Walbaum;J. Mar. Biol Soc. U.K. 26 115–138CrossRefGoogle Scholar
  3. Hile R 1936 Age and growth of cisco,Leucichthys artedi (Le Sauer) in the lakes of North-eastern highlands, Wisconsin;Bull. U.S. Bur. Fish. 48 211–317Google Scholar
  4. Kestevan G L 1947 On the ponderal index, or condition factor, as employed in fisheries biology;Ecology 17 78–80CrossRefGoogle Scholar
  5. Le Cren E D 1951 The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Percafluviatilis),J. Anim. Ecol.20 201–219CrossRefGoogle Scholar
  6. Nair J R and Nair N B 1981 Prey-predator relationship and feeding ethology in the glassy perchlet,Chanda ( = Ambassis) commersonii (Cuv. & Val.) (Pisces: Centropomidae);Indian J. Mar. Sci. 8 142–147Google Scholar
  7. Qasim S Z 1957 The biology ofBlennius pholis L. (Teleostei);Proc. Zool. Soc. London. 128 161–208Google Scholar
  8. Raman K, M Kaliyamurthy and G R M Rao 1975 Studies on the biology ofAmbassis gymnocephalus (Lac.) from Pulicat and Vembanad lakes;Matsya 1 49–52Google Scholar
  9. Thompson D A W 1943On the growth and form 2nd edn; (Cambridge: University Press)Google Scholar
  10. Weatherly A H 1972Growth and ecology of fish populations; (London and New York: Academic Press)Google Scholar

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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