NEW DATA ON THREE SPECIES OF KOELLIKERIOIDES (DIGENEA, DIDYMOZOIDAE) IN BRAZILIAN TUNA FISHHOPKINSI (EUCESTODA, HYMENOLEPIDIDAE) IN NETTA PEPOSACA (AVES, ANATIDAE) IN SOUTH AMERICA

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DOI:

https://doi.org/10.24039/rnh2011521062

Keywords:

Fish parasites, Koellikerioides apicalis, Koellikerioides externogastricus, Koellikerioides intestinalisicus, Scombridaeites

Abstract

Four species of scombrid fishes (Perciformes) from the coastal zone of Rio de Janeiro, Brazil, were
examined for helminth parasites. These are Thunnus albacares (Bonnaterre, 1788), Thunnus atlanticus
(Lesson, 1831), Thunnus obesus (Lowe, 1839) and Euthynnus alletteratus (Rafinesque, 1810). Three
species of the genus Koellikerioides Yamaguti, 1970: K. apicalis Yamaguti, 1970, K. externogastricus
Yamaguti, 1970 and K. intestinalis Yamaguti, 1970, were recorded from the gill raker, the outer muscle
layer of the stomach wall and the inner surface of the small intestine, respectively. Original
measurements, parameters of infection and original figures are presented. K. apicalis and K. intestinalis
showed the typical aggregated distribution pattern. Statistical analysis showed that there was a
significant negative correlation between the total lengths of E. alletteratus and the prevalence of K.
intestinalis. The findings of K. apicalis in T. atlanticus and of K. intestinalis in T. atlanticus and E.
alletteratus represent new host records. All species are reported for the first time in the Southwest
Atlantic Ocean.

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Published

2011-05-23

How to Cite

Nascimento Justo, M. C., & Kohn, A. . (2011). NEW DATA ON THREE SPECIES OF KOELLIKERIOIDES (DIGENEA, DIDYMOZOIDAE) IN BRAZILIAN TUNA FISHHOPKINSI (EUCESTODA, HYMENOLEPIDIDAE) IN NETTA PEPOSACA (AVES, ANATIDAE) IN SOUTH AMERICA. Neotropical Helminthology, 5(2), 113–123. https://doi.org/10.24039/rnh2011521062

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Artículos Originales