Wyniki wyszukiwania

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Studies on Psilodraco breviceps Norman, 1937 [Pisces, Notothenioidei, Bathydraconidae] the region of South Georgia

100%

Kompowski A.

Acta Ichthyologica et Piscatoria

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1992

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tom 22

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nr 1

3-14

2

Studies on Psilodraco breviceps Norman, 1937 [Pisces, Notothenioidei, Bathydraconidae] from the region of South Georgia

100%

Kompowski A.

Acta Ichthyologica et Piscatoria

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1992

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tom 22

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nr 1

3

The osteology and ossification variability of the skull of Antarctic white-blooded fish Chaenodraco wilsoni Regan, 1914 [Channichthyidae, Notothenioidei]

84%

Zabrowski M.

Acta Ichthyologica et Piscatoria

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2000

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tom 30

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nr 2

A detailed osteological analysis of the skull of an Antarctic fish, Chaenodraco wilsoni Regan, 1914 (Channichthyidae, Notothenioidei) was done, focusing on the bone structure and osteological variability. A notable reduction of the ossification was observed, which took place in several ways: replacement of the whole bone with cartilage, only superficial ossification (e.g. in the ethmoid region), separation of the bones by wide cartilage areas (e.g. in the brain case), and reduction of bone dimensions. An extreme case was complete loss of the opisthootic-the first record of this kind within this family of fishes. The reduction of ossification in Ch. wilsoni resulted in high osteological variability that was observed in the case of reduced bones. Instances of asymmetry of paired elements of the skeleton were observed as well.

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Occurrence of Digenea in fishes other than Notothenioidei in the Weddell Sea and the whole Antarctica

67%

Zdzitowiecki K.

Acta Parasitologica

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2003

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tom 48

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nr 3

In total, 60 fish specimens belonging to four families, Zoarcidae (19 specimens of three species), Liparididae (14 specimens of two species), Macrouridae (23 specimens of one species) and Rajidae (four specimens of two species), caught in the Weddell Sea were examined. A zoarcid, Lycodichthys dearborni, and both Rajidae, Bathyraja maccaini and Bathyraja sp., were not infected. Macrourus whitsoni was the most strongly infected (six digenean species found, prevalence 91.3%, mean abundance 10.13). Two zoarcids, Ophthalmolycus amberensis and O. bothriocephalus, were infected with Macvicaria longibursata; the former also with Aphanurus sp., Paraliparis antarcticus and P. trilobodon were infected with Steringophorus liparidis and Neolebouria terranovaensis, and Derogenes johnstoni, respectively. The check list of Digenea recorded in Antarctica in non- notothenioid fishes is given. Infected fishes belong to six families, Zoarcidae (7 digenean species found), Macrouridae (8), Muraenolepididae (9), Liparididae (5), Bathylagidae (one) and Rajidae (one). In total, 29 digenean species were found, of which 12 are common for Notothenioidei and other fishes, whereas 17 species are specific for non-notothenioid definitive hosts. Digenea belong to four higher taxa, Opecoelidae (10 species), Lepocreadiidae (10), Fellodistomidae (one) and Hemiuroidea (8).

Ograniczanie wyników

3 Acta Ichthyologica et Piscatoria

1 Acta Parasitologica

2 Kompowski A.

1 Zabrowski M.

1 Zdzitowiecki K.

1 2003

1 2000

2 1992

Studies on Psilodraco breviceps Norman, 1937 [Pisces, Notothenioidei, Bathydraconidae] the region of South Georgia

Studies on Psilodraco breviceps Norman, 1937 [Pisces, Notothenioidei, Bathydraconidae] from the region of South Georgia

The osteology and ossification variability of the skull of Antarctic white-blooded fish Chaenodraco wilsoni Regan, 1914 [Channichthyidae, Notothenioidei]

Occurrence of Digenea in fishes other than Notothenioidei in the Weddell Sea and the whole Antarctica