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Controlled spawning and larval development in the sharpsnout sea bream (Diplodus puntazzo, Sparidae)
Greco, S.; Lo Paro, G.; Caridi, D.; Perdichizzi, F.; Cammaroto, S.; Micale, V.; Genovese, L. (1993). Controlled spawning and larval development in the sharpsnout sea bream (Diplodus puntazzo, Sparidae), in: Barnabé, G. et al. (Ed.) Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18: pp. 185-188
In: Barnabé, G.; Kestemont, P. (Ed.) (1993). Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18. European Aquaculture Society: Gent. 587 pp., more
In: EAS Special Publication. European Aquaculture Society, more

Available in Authors 
    VLIZ: Proceedings [14695]
Document type: Conference paper

Keyword
    Marine

Authors  Top 
  • Greco, S.
  • Lo Paro, G.
  • Caridi, D.
  • Perdichizzi, F.
  • Cammaroto, S.
  • Micale, V.
  • Genovese, L.

Abstract
    Diplodus puntazzo (sharpsnout sea bream) is a typical member of the Sparidae family (Osteichthyes, Fishes). It is common in the Mediterranean, Black Sea, and Atlantic Ocean, chiefly on rocks, to about 50m depth. It feeds on small invertebrates and also on algae. This species is hermaphrodite, frequently showing precocious sex differentiation. Experiments on the reproduction of Diplodus puntazzo were carried out under controlled conditions. The techniques adopted to stimulate spawning, the eggs characteristics, and the phases of embryonic development are described. Broodstock used for the experiment was caught in the south Tyrrhenian Sea, reared in PVC tanks and fed on moist food such as fishing scraps. A hormonal treatment to stimulate spawning was used. The eggs obtained were kept in green water under different temperature and salinity conditions. After yolk sac resorption, larvae were fed on ciliates, protozoa and rotifers. Later larvae were fed on Artemia nauplii and metanauplii. The results show a correlation with temperature and salinity values; such parameters influenced significantly the growth rates. Larval development is sensitive to temperature and salinity such that, when these parameters are outside of a narrow range, damage occurs to the skeletal and muscular apparatus. Different experimental conditions allowed us to determine the survival threshold in early living stages.

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