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Interruptions in the spawning cycle of Atlantic cod, Gadus morhua, from a fjord-like inlet in Trinity Bay, Newfoundland
Rideout, R.M.; Burton, M.P.M. (2000). Interruptions in the spawning cycle of Atlantic cod, Gadus morhua, from a fjord-like inlet in Trinity Bay, Newfoundland, 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. 108
In: Norberg, B. et al. (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. International Symposium on the Reproductive Physiology of Fish, 6. 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
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Keyword
    Marine/Coastal
Authors  Top 
  • Rideout, R.M.
  • Burton, M.P.M.
Abstract
    A total of 150 female Atlantic cod, Gadus morhua L., were collected from Smith Sound, Newfoundland in January 1999. Many of these fish were large with small ovaries that visually appeared immature or spent. Histology revealed that nearly one third of the females sampled had ovaries that were actively resorbing all oocytes that had started to ripen. The mass resorption of oocytes would have caused spawning omission by these fish in 1999. Fish with resorbing oocytes had lower liver weights than ripening fish perhaps indicating that oocyte breakdown was stimulated by nutritional deprivation.
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