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Digenea of fishes of the Weddell Sea. VI. The superfamily Hemiuroidea

100%

Zdzitowiecki K.

Acta Parasitologica

1997

tom 42

nr 4

In total, 404 fishes of 34 species were examined and 678 digenean specimens found. Apart from data on Macrourus whitsoni previously published, 40 specimens of teleost fishes belonging to 14 species and six families were infected with Hemiuroidea; 91 specimens belonging to seven species and four families were collected. Metacercariae of Otodistomum cestoides (Beneden, 1871) (family Azygiidae) occurred in cysts on the mesentery. The remaining species, Genolinea bowersi (Leiper et Atkinson, 1914) and Aphanurus sp. (Bunocotylidae); Derogenes johnstoni Prudhoe et Bray, 1973 and Gonocerca phycidis Manter, 1925 (Derogenidae); Elytrophalloides oatesi (Leiper et Atkinson, 1914) and Glomericirrus macrouri (Gaevskaya, 1975) (Hemiuridae), occurred as adults in the alimentary tract. A single specimen of Aphanurus sp. probably belongs to a new species, but is a little distorted and lacks eggs. The other species were found in 17 new hosts. O. cestoides, G. bowersi and D. johnstoni were found in the Weddell Sea for the first time. G. macrouri occurred mainly in fishes living in deep waters (below 300 m), whereas E. oatesi (rare in the investigated area) mainly in shallower waters.

Occurrence of Digenea in fishes of the family Bathydraconidae in the Weddell Sea and other areas of Antarctica

100%

Zdzitowiecki K.

Acta Parasitologica

2002

tom 47

nr 4

Four digenean species, Stenakron glacialis, Lepidapedon garrardi, Steringophorus arntzi and Otodistomum cestoides (metacercariae) were recorded in three of four bathydraconid species (59 specimens) examined in the Weddell Sea. The only previously reported species, Elytroplicilloides oatesi, was found there only in other hosts. The total number of digenean species known as occurring in Bathydraconidae in Antarctica increased to 13. They were recorded in eight of ten host species examined. However, only a few specimens of most of bathydraconid species were investigated. Most of digenean species are more abundant in other fishes, especially in Nototheniidae and Channichthyidae. S. arntzi and S. glacialis normally occur in Bathydraco marri and Racovitzia glacialis respectively, but they were occasionally found also in Artedidraconidae; the latter was reported also from a liparidid. Intensities of infections are usually low, except in three large predatory species, Parachaenichthys charcoti, P. georgianus and Cygnodraco mawsoni, which can be parasitized by about 100 or more digeneans in some single hosts.

Ograniczanie wyników

2 Acta Parasitologica

2 Zdzitowiecki K.

1 2002

1 1997

Wyniki wyszukiwania

Digenea of fishes of the Weddell Sea. VI. The superfamily Hemiuroidea

Occurrence of Digenea in fishes of the family Bathydraconidae in the Weddell Sea and other areas of Antarctica