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1

Morphology and occurrence of Dichelyne [Cucullanellus] fraseri [Baylis, 1929], a parasitic nematode of Antarctic and sub-Antarctic fishes

100%
Zdzitowiecki K., Cielecka D.
Acta Parasitologica
|
1996
|
tom 41
|
nr 1
In total, 1414 Antarctic bony fishes and 66 sub-Antarctic ones were examined for nematodes. One species, Dichelyne (Cucullanellus) fraseri (Baylis, 1929), is redescribed and figured. Dichelyne fraseri var. nototheniae (Baylis, 1929) is considered identical with the nominal form. The validity of D. dichelyneformis (Szidat, 1950) is questioned. D. fraseri is considered a specific parasite of Notothenioidea (Perciformes) and a report on the occurrence in Muraenolepis marmoratus (Gadiformes, Muraenolepidae) is considered doubtful. Occurrence of D. fraseri is reported from 3 areas in the West Antarctic - at South Georgia, the S. Orkney Islands (new geographic record) and the S. Shetland Islands (new geographic record, probably at the southern border of its geographical distribution), as well as from the Kerguelen subregion of the sub-Antarctic. The species was also reported by various authors from the Magellanic sub- region, but it is absent in the subcontinental waters (southern part of the West Antarctic and the whole of East Antarctic). The species is associated with benthic and bentho-pelagic hosts. New host records are Parachaenichthys georgianus, Notothenia angustifrons, N. neglecta, Nototheniops nudifrons and Trematomus vicarius. All previous and present data are summarized.
2

A contribution to the morphology of the Antarctic fish lepocreadiid digeneas, with a description of a new genus

75%
Zdzitowiecki K.
Acta Parasitologica
|
1993
|
tom 38
|
nr 3
Additional data on the details of the male terminalia of Antarctic representatives of the genera Lepidapedon Stafford, 1904 and Neolepidapedon Manter, 1954 are given. The cirrus sac or its distal part of a "Lepidapedon-type" was found in 6 species, L. garrardi (Leiper et Atkinson, 1914), L. notogeorgianus Zdzitowiecki, 1990, L. paralebouri Zdzitowiecki, 1990, L. tertius Zdzitowiecki, 1990, N. magnatestis (Gaevskaya et Kovaljova, 1976) and N. trematomi Prudhoe et Bray, 1973. A new genus, Postlepidapedon, is erected, with P. opisthobifurcatus (Zdzitowiecki, 1990) relegated from the genus Neolepidapedon, as a type-species. The genus is distinguished from related genera in the intestinal bifurcation at the posterior margin of the ventral sucker, lack of the pseudoesophagus, the cirrus sac similar to a "Opechona-type" and the excretory vesicle reaching the anterior testis. Muraenolepitrema magnatestis Gaevskaya et Rodjuk, 1988 is redescribed.
3

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

75%
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.
4

New data on the occurrence of Acanthocephala in some fish in Admiralty Bay (South Shetland Islands)

63%
Zdzitowiecki K., Laskowski Z.
Acta Parasitologica
|
2013
|
tom 58
|
nr 4
New data on the infection with Acanthocephala of 33 fish caught in Admiralty Bay in November 2007 to January 2008 are given. These fish belong to 5 species: Notothenia rossii (22 immature specimens), Lindbergichthys nudifrons (n = 7), Trematomus bernacchii (n = 1), T. newnesi (n = 1) and Harpagifer antarcticus (n = 2). Three species of Echinorhynchida: Aspersentis megarhynchus, Metacanthocephalus dalmori and M. johnstoni and four species of Polymorphida: Corynosoma arctocephali, C. bullosum, C. hamanni and C. pseudohamanni, were found. Prevalence of N. rossii and L. nudifrons was 100%. The mean abundance of infection of N. rossii (125.09) was larger than that of Notothenia coriiceps (82.93). Data of infection of N. rossii in 2007 was almost identical with that in 1979 (mean abundance 118.66). The most abundant in this host were A. megarhynchus, M. johnstoni, C. hamanni and C. pseudohamanni (mean abundances 36.36, 29.77, 13.86 and 44.73, respectively). In total Echinorhynchida were more abundant than Polymorphida in 2007/08 (66.18 versus 58.91). Reverse situation was in 1979 (mean abundance 47.36 for Echinorhynchida and 71.3 for Polymorphida. Only 7 L. nudifrons were examined in 2007/08 and Echinorhynchida were more numerous in this host (mean abundance 26.71) than Polymorphida (10.29). Single specimens of other fish were infected with a few Acanthocephala belonging to species recorded in the same hosts with those found in 1978/79.
5

A re-examination of some Antarctic and subantarctic fish digeneans from the collection of the British Museum (Natural History)

63%
Zdzitowiecki K.
Acta Parasitologica
|
1993
|
tom 38
|
nr 4
Mounts of four digenean forms designated by Prudhoe and Bray 1973 only to the genera or family were re-examined. "Opecoelidae (sp. indet.)" = Neolebouria terranovaensis Zdzitowiecki, Pisano et Vacchi, 1993. "Helicometra sp." = Helicometra antarcticae Holloway et Bier, 1968. "Stenakron sp. indet." = Stenakron glacialis Zdzitowiecki, 1989. "Neolepidapedon sp." =Neolepidapedon macquariensis sp. n. Specimens of "Neolepidapedon sp." (= probably N. macquariensis sp. n.) collected from Notothenia mizops are accompanied on the slide with other digeneans, Postmonorchis variabilis Prudhoe et Bray, 1973.
6

Helminths of Antarctic fishes: Life cycle biology specificity and geographical distribution

63%
Rocka A.
Acta Parasitologica
|
2006
|
tom 51
|
nr 1
Bony fishes (Teleostei) play an important role in the completion of life cycles of helminth parasites in the Antarctica. These fishes may be definitive, second intermediate or paratenic hosts of the helminths. The most species-rich taxon is Digenea. Virtually all of these digeneans use teleosts as definitive hosts. Only one species, Otodistomum cestoides, occurs as the adult stage in skates (Chondrichthyes), with teleosts as its second intermediate host. Among 14 cestode species maturing in fishes only one, Parabothriocephalus johnstoni, occurs in a bony fish, Macrourus whitsoni, whereas the others are parasites of Chondrichthyes (cartilaginous fishes). Antarctic Chondrichthyes are not infected with nematode and acanthocephalan species. Specificity to the intermediate and/or paratenic hosts of the majority of Antarctic helminths is wide, whereas that for definitive hosts is often narrower, restricted to one order or sometimes even to one or two host species. Almost all of 73 helminth species maturing in Antarctic fishes are endemics. Only 4 digenean and one nematode species are cosmopolitan or bipolar.
7
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Leeches [Hirudinida: Piscicolidae] - parasites of Antarctic fish from Channichthyidae family

51%
Bielecki A., Rokicka M., Ropelewska E., Dziekonska-Rynko J.
Wiadomości Parazytologiczne
|
2008
|
tom 54
|
nr 4
345-348
8

The tetraphyllidean and tetrabothriid cercoids from Antarctic bony fishes. I. Morphology. Identification with adult forms

51%
Wojciechowska A.
Acta Parasitologica
|
1993
|
tom 38
|
nr 1
Cercoid larvae of tapeworms representing the order Tetraphyllidea (7 distinct forms) and the family Tetrabothriidae (1 form) were found in the intestines of Antarctic bony fishes. These forms differ from one other in morphology and geographical distribution. Cercoids with bilocular bothridia lacking accessory suckers (2 forms) probably belong to tapeworms of the genera Pseudanthobothrium and Anthobothrium, those with monolocular bothridia with accessory suckers (3 forms) to the genus Phyllobothrium, while those with trilocular bothridia may belong to the species Oncobothrium antarcticum Wojciechowska, 1990. One form with undivided bothridia with accessory suckers and hook-like projections probably belongs to an unreported species of the genus Dinobothrium. The last form lacking bothridia seems to be a cercoid of the family Tetrabothriidae.
9

Antarctic fishes: the chemical composition of muscle, liver and food of two notothenioids

51%
Kamler E.
Archives of Polish Fisheries
|
2003
|
tom 11
|
nr 2
A combination of low fat (6.1 and 4.8% of dry matter), high protein (78.6 and 84.3% d.m.) and mineral content (6.3 and 6.2% d.m.), as well as high moisture (80.8 and 81.7% of fresh matter), which is typical of Antarctic benthic fish, was found in the muscle of Notothenia coriiceps and Lepidonotothen nudifrons, respectively. Fish food items (whole amphipods) were high in minerals (34.3% d.m.) and poor in protein (39.1% d.m.), while macroalgae presented an association of high moisture (89% of wet matter), high minerals (36.5% d.m.), low lipids (1.8% d.m.) and very low protein (17.5% d.m.). The poor nutritional value of these food items seems to be compensated for by high food intake. Sulfur levels in fish tissues were negatively related to fish size. Sulfur and nitrogen were inter-correlated strongly and positively, and most of the sulfate is probably derived in muscle and liver from sulfur-containing amino acids.
10

Biometrical variability and occurrence of Ascarophis nototheniae [Nematoda, Cystidicolidae], a parasitic nematode of Antarctic and subantarctic fishes

51%
Rocka A.
Acta Parasitologica
|
1999
|
tom 44
|
nr 3
In total, 1446 Antarctic and subantarctic teleosts were examined for nematodes. One species, Ascarophis nototheniae Johnston et Mawson, 1945, is reported. New data on the biometrical variability and the occurrence or absence of this species are given. Three areas of the West Antarctic (the South Shetland Islands, South Georgia and South Orkneys) as well as three areas of the East Antarctic (Davis Sea, Weddell Sea and off Adelie Land) are new geographical localities for this nematode species. Also, 21 fish species represent new host records for A. nototheniae. Two predatory channichthyid species, Chaenocephalus aceratas and Cryodraco antarcticus are the most strongly infected fishes in all examined areas, except the Weddell Sea.
11

Changes in acanthocephalan infection of the Antarctic fish Notothenia coriiceps in Admiralty Bay, King George Island, over 29 years

38%
Laskowski Z., Korczak-Abshire M., Zdzitowiecki K.
Polish Polar Research
|
2012
|
tom 33
|
nr 1
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