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Growth and food conversion in juvenile southern sea bass, Centropristis melana (Ginsburg), fed commercial and seminatural diets
Harpster, B.V.; Roberts, D.E.; Bruger, G.E. (1977). Growth and food conversion in juvenile southern sea bass, Centropristis melana (Ginsburg), fed commercial and seminatural diets, in: Avault, J.W. Proceedings of the eighth annual workshop World Mariculture Society: January 9-13, 1977, Cariari Hotel, San Jose, Costa Rica. Journal of the World Mariculture Society, 8: pp. 795-809
In: Avault, J.W. (1977). Proceedings of the eighth annual workshop World Mariculture Society: January 9-13, 1977, Cariari Hotel, San Jose, Costa Rica. Journal of the World Mariculture Society, 8. World Mariculture Society: Baton Rouge. 984 pp.
In: Journal of the World Mariculture Society. Louisiana State University: Baton Rouge, Louisiana. ISSN 0735-0147
Beschikbaar in  Auteurs 
Documenttype: Congresbijdrage
Trefwoorden
    Aquaculture > Marine aquaculture
    Cultures > Fish culture
    Food conversion
    Population functions > Growth
    Centropristis melana Ginsburg, 1952 [WoRMS]
    Marien/Kust
Auteurs  Top 
  • Harpster, B.V.
  • Roberts, D.E.
  • Bruger, G.E.
Abstract
    Laboratory-reared juvenile southern sea bass, Centropristis melana (Ginsberg), were studied to evaluate effects of five diets on growth and food conversion. Diets studied were Marine Ration 20, squid, Marine Ration 30, Catfish Cage Chow, and Trout Chow; each diet had a different total protein content. Diet treatments were conducted using a completely random design in 2 . 36 x 0 . 97 x 0 . 50 m tanks with biological filtration. Fish were fed twice daily at 3% body weight day-1 and reduced to 2% body weight at the first signs of wastage. Body weights and total lengths were recorded every two weeks. The Marine Ration 20 diet was terminated at sampling period I due to diet rejection and high mortalities. Significant differences ( alpha = 0 . 05) in mean body weights among remaining diets occurred by the eighth week, as demonstrated by Tukey's Honestly Significant Difference test. The experiment was terminated after ten weeks. Of all diet treatments taken to termination, juveniles fed squid suffered the highest number of mortalities. Food conversion (g feed g-1 gain) and mean percent body weight increase for Trout Chow, squid, Catfish Cage Chow, and Marine Ration 30 were 1 . 30 and 172 . 90%, 1 . 55 and 180 . 57%, 2 . 48 and 63 . 10%, and 3 . 55 and 56 . 00%, respectively. Results of all measured parameters show that Trout Chow was superior in rearing juvenile southern sea bass.
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