Short Communication

Temperature preference of juvenile dusky kob Argyrosomus japonicus (Pisces: Sciaenidae)

  • A Bernatzeder Department of Ichthyology and Fisheries Science, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
  • PJ Britz Department of Ichthyology and Fisheries Science, Rhodes University, PO Box 94, Grahamstown 6140, South Africa

Abstract

The final temperature preference of cultured juvenile dusky kob is determined to provide an indicator of their optimum temperature for growth. Trials were conducted over a five-day period in horizontal temperature gradients ranging from 21°C to 27°C. Control trials were run for the same duration, in isothermal conditions. The final temperature preference of the juvenile fish was 25°–26.4°C. This falls within the upper end of the temperature range of 12°–28°C that juvenile kob experience in the wild and has important implications for the optimal location of kob farms in southern Africa.

Keywords: aquaculture, Argyrosomus japonicus, final temperature preference, horizontal choice chamber, South Africa

African Journal of Marine Science 2007, 29(3): 539–543
Published
2008-02-07
Section
Articles

Journal Identifiers


eISSN: 1814-2338
print ISSN: 1814-232X