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R. K. DELL
benthic group of Trematomus species did not occur far from the
bottom.
Hureau (1970) has produced a comprehensive work on the biology
of two species of Trematomus and four of Notothenia from Adelie Land
and Kerguelen. Unfortunately this work came to hand too late to be
properly considered in the present review.
7. Distribution of fishes
Andriashev (1965) has adapted from Nybelin (1947) a series of
divisions of the Antarctic fish fauna based upon distribution patterns.
Excluding a Kerguelen-type which is essentially Subantarctic, he distinguishes six distribution types.
1. Circumpolar-Antarctic type made up of species which are distributed around the Continent. This includes nearly 20 species, including
some which reach the South Shetlands and South Orkneys, and two
which reach South Georgia.
2. East Antarctic type composed of fishes found only in East Antarctica. Nybelin included 27 species in this group. Andriashev showed
that Gymnodraco acuticeps must be excluded, but added at least four
others. Five genera are confined to East Antarctica, Histiodraco, Neopagetopsis, Dacodraco, Chaenodraco and Lycodichthys.
3. West Antarctic type composed of fishes which are known only
from the shores of West Antarctica and its associated islands. Of the
eight species listed by Nybelin, only six can now be included, and some
of these are rather uncertain (Andriashev, 1965).
4. West Antarctic-South Georgia type. Four species which occur in
West Antarctica and also South Georgia (some also on the South
Sandwich Islands) make up this small group which may represent only
an extension of the West Antarctica type (Notothenia gibberifrons
Lunnberg, N . nudifrons Lunnberg, N . larseni Lonnberg and Chaenocephalus aceratus.
5. South Georgian type. Nine or ten species of fishes are endemic to
South Georgia, as are the two genera, Psilodraco and Pseudochenichthys.
6. Antarctic-Notal type (or mainly notal type) includes a few species
off Patagonia or southern New Zealand which penetrate the peripheral
parts of the Antarctic (or Subantarctic) including South Georgia.
Based upon his analysis of fish distributions Andriashev (1965)
divides the Antarctic Region into Subregions, Provinces and Districts
(as discussed in the introductory section of the present work). Basically
the subdivisions are arranged as follows.
R. K. DELL
benthic group of Trematomus species did not occur far from the
bottom.
Hureau (1970) has produced a comprehensive work on the biology
of two species of Trematomus and four of Notothenia from Adelie Land
and Kerguelen. Unfortunately this work came to hand too late to be
properly considered in the present review.
7. Distribution of fishes
Andriashev (1965) has adapted from Nybelin (1947) a series of
divisions of the Antarctic fish fauna based upon distribution patterns.
Excluding a Kerguelen-type which is essentially Subantarctic, he distinguishes six distribution types.
1. Circumpolar-Antarctic type made up of species which are distributed around the Continent. This includes nearly 20 species, including
some which reach the South Shetlands and South Orkneys, and two
which reach South Georgia.
2. East Antarctic type composed of fishes found only in East Antarctica. Nybelin included 27 species in this group. Andriashev showed
that Gymnodraco acuticeps must be excluded, but added at least four
others. Five genera are confined to East Antarctica, Histiodraco, Neopagetopsis, Dacodraco, Chaenodraco and Lycodichthys.
3. West Antarctic type composed of fishes which are known only
from the shores of West Antarctica and its associated islands. Of the
eight species listed by Nybelin, only six can now be included, and some
of these are rather uncertain (Andriashev, 1965).
4. West Antarctic-South Georgia type. Four species which occur in
West Antarctica and also South Georgia (some also on the South
Sandwich Islands) make up this small group which may represent only
an extension of the West Antarctica type (Notothenia gibberifrons
Lunnberg, N . nudifrons Lunnberg, N . larseni Lonnberg and Chaenocephalus aceratus.
5. South Georgian type. Nine or ten species of fishes are endemic to
South Georgia, as are the two genera, Psilodraco and Pseudochenichthys.
6. Antarctic-Notal type (or mainly notal type) includes a few species
off Patagonia or southern New Zealand which penetrate the peripheral
parts of the Antarctic (or Subantarctic) including South Georgia.
Based upon his analysis of fish distributions Andriashev (1965)
divides the Antarctic Region into Subregions, Provinces and Districts
(as discussed in the introductory section of the present work). Basically
the subdivisions are arranged as follows.