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Effects of exercise and continuous light on early sexual maturation in farmed Atlantic cod (Gadus morhua L.)
Karlsen, Ø.; Taranger, G.L.; Dahle, R.; Norberg, B. (2000). Effects of exercise and continuous light on early sexual maturation in farmed Atlantic cod (Gadus morhua L.), in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 328-330
In: Norberg, B. et al. (Ed.) (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., more
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales, more

Available in Authors 
    VLIZ: Proceedings [4277]

Keyword
    Marine

Authors  Top 
  • Karlsen, Ø.
  • Taranger, G.L.
  • Dahle, R.
  • Norberg, B.

Abstract
    The combined effects of photoperiod treatment and swimming speed (exercise) on growth, energy deposition (liver size), gonadal development, and proportion of spawning fish at an age of two years, were studied in Atlantic cod. Exercising cod at 0.5 or 1 body lengths per sec had only minor effects on growth, and did not influence gonadosomatic indices nor the proportion of maturation of 2 year old cod. On the other hand, continuous light improved growth and delayed gonadal development; no maturation was seen at an age of two years

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