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New data on the morphology and occurrence of a parasite of Antarctic fishes, Derogenes johnstoni Prudhoe et Bray, 1973 [Digenea, Hemiuroidea]

100%

Zdzitowiecki K., Pisano E., Vacchi M.

Acta Parasitologica

1993

tom 38

nr 2

Derogenes johnstoni Prudhoe et Bray, 1973 is redescribed based on newly collected specimens from notothenioid fishes from the Ross Sea. The species is distinguished from D. varicus (Müller, 1784) by larger eggs, 0.061-0.079 x 0.039-0.051 mm, with very thick shell, 0.005-0.007 mm wide, and a small knob at the anopercular pole. D. johnstoni seems to be common in Terra Nova Bay and probably in all subcontinental waters of the East Antarctic, while D. various (a cosmopolitan species) occurs commonly in the subantarctic and rarely at the South Shetland Islands.

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

67%

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.

Ograniczanie wyników

2 Acta Parasitologica

2 Zdzitowiecki K.

1 Pisano E.

1 Vacchi M.

1 1997

1 1993

Wyniki wyszukiwania

New data on the morphology and occurrence of a parasite of Antarctic fishes, Derogenes johnstoni Prudhoe et Bray, 1973 [Digenea, Hemiuroidea]

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