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Study of Diplectanum aequans (Monogenea), parasite of sea bass (Dicentrarchus labrax) in intensive farming
Cognetti Varriale, A.M.; Castelli, A.; Cecchini, S.; Saroglia, M. (1993). Study of Diplectanum aequans (Monogenea), parasite of sea bass (Dicentrarchus labrax) in intensive farming, 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. 143-153
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. Special Publication European Aquaculture Society, 18. European Aquaculture Society: Gent. 587 pp., more
In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689, more

Available in  Authors 
Document type: Conference paper

Keyword
    Marine/Coastal

Authors  Top 
  • Cognetti Varriale, A.M.
  • Castelli, A., more
  • Cecchini, S.
  • Saroglia, M.

Abstract
    The distribution of the parasite along three axes of sea bass gill structures shows differences among adult and juvenile forms. Along the antero-posterior axis, the adult presence is higher in the two first gill arches while juveniles were distributed on 2nd and 3rd gill arches. The medium-lateral axis shows tendency of adults to be distributed at the extremity of lamellae, while juveniles were located on the internal face of each hemibranchia. Along the dorso-ventral axis, both adults and juveniles were located mainly on the central areas of each hemi-branchia. Differences in distribution have been related to water flow through the gill system and to a loss of the juvenile forms during migration. Indications are also given to minimize the acute impact on the receiving environment, due to chemical antiparasitic treatments.

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