Environmental Biology of Fishes

, Volume 3, Issue 3, pp 287–292

Reproductive biology of Sarotherodon mossambicus (Cichlidae) in Plover Cove Reservoir, Hong Kong

  • I. John Hodgkiss
  • Hanson S. H. Man
Article

DOI: 10.1007/BF00001454

Cite this article as:
Hodgkiss, I.J. & Man, H.S.H. Environ Biol Fish (1978) 3: 287. doi:10.1007/BF00001454

Synopsis

A 16-month study (August 1972 to November 1973) of Sarotherodon mossambicus in the Plover Cove Reservoir, Hong Kong revealed a sex ratio of 1:1 for small fish (below 19 cm standard length), but above this length males predominated in the population. Monthly sex composition also showed this approximately 1:1 ratio except during the months of August and September, when again males predominated. Males and females reached M50 at an average length of 17.8 cm and 16.2 cm respectively. Maturity and gonosomatic index studies showed that spawning occurred from May to October with peaks in June and August, and there were at least two spawnings each year. The relationship between fecundity and standard length of females collected during both spawnings was computed to be F = 118.49L–1150.91.

Keywords

TilapiaCichlidsBreedingIntroductionMan-made LakeFecunditySpawningSex ratioSexual maturity

Copyright information

© Dr. W. Junk bv Publishers 1978

Authors and Affiliations

  • I. John Hodgkiss
    • 1
  • Hanson S. H. Man
    • 1
  1. 1.Department of BotanyUniversity of Hong KongHong Kong