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The occurrence and infection dynamics of Anisakis larvae in the black-scabbard fish, Aphanopus carbo, chub mackerel, Scomber japonicus, and oceanic horse mackerel, Trachurus picturatus from Madeira, Portugal

Published online by Cambridge University Press:  12 April 2024

G. Costa*
Affiliation:
CEM, Centre for Macaronesian Studies, Campus da Penteada, 9000-390 Funchal, Portugal.
T. Pontes
Affiliation:
CEM, Centre for Macaronesian Studies, Campus da Penteada, 9000-390 Funchal, Portugal.
S. Mattiucci
Affiliation:
Department of Science and Public Health, Section of Parasitology, University of Rome ‘La Sapienza’, Piazzale Aldo Moro, 5, 00185 Rome, Italy.
S. D'Amélio
Affiliation:
Department of Science and Public Health, Section of Parasitology, University of Rome ‘La Sapienza’, Piazzale Aldo Moro, 5, 00185 Rome, Italy.
*
* Fax: +351 291 705399 E-mail: costag@uma.pt.

Abstract

Larval stages of Anisakis spp. (Nematoda: Anisakidae) were found encapsulated or free in the viscera and abdominal cavity of the black-scabbard fish, Aphanopus carbo, chub mackerel, Scomber japonicus and oceanic horse mackerel, Trachurus picturatus in Madeiran waters. The prevalence of infection reached 97.2% (n=142) for A. carbo, 69.5% (n=154) for S. japonicus and 62.5% (n=40) for T. picturatus. Considerable differences in parasite intensities between A. carbo and both S. japonicus and T. picturatus were found, with mean intensities up to 69.6 in A. carbo, while in the other two fish hosts the intensity reached only a maximum of 2.6. These differences were probably due to different feeding behaviours of the hosts. Intensities of Anisakis sp. in A. carbo were high irrespective of sex and season. No relationship between host length and prevalence of infection was observed for A. carbo, while for S. japonicus a weak positive significant relationship was found.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2003

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