ISSN 10630740, Russian Journal of Marine Biology, 2010, Vol. 36, No. 3, pp. 176–190. © Pleiades Publishing, Ltd., 2010.
Original Russian Text © E.A. Chegodaeva, I.A. Chereshnev, 2010, published in Biologiya Morya.
The Fedorov eelpout,
nev, Nazarkin and Chegodaeva, 2007 is the third spe
genus known in the Sea of Okhotsk.
Previously, the eastern eelpout
1868, populating the northern part of the Sea of Japan,
and Andriashev’s eelpout
ryev and Karmovskaya, 2005, inhabiting the coast of
southwest Kamchatka, were known in the sea of
Okhotsk [3, 4, 8, 13–16, 21, 23, 24]. At present, the
only known habitat of the Fedorov eelpout is north of
the Sea of Okhotsk in Tauiskaya Guba (a typical habi
tat), Kekurnyi and Perevalochnyi Bays of the Pyagin
Peninsula, and the Impoveem lagoon of the Taigonos
Peninsula. It inhabits the Tauiskaya Guba together
with the eastern eelpout, but the species occupy differ
ent biotopes of the coastal and guba areas .
The biology of eelpouts from the fareastern seas of
Russia is little studied as yet; the published data con
cern only the eastern eelpout from Kamchatka waters
 and the coastal areas of eastern Sakhalin . After
finding and describing
, not only the mor
phological and molecular–genetic features of that
species [9, 10, 16], but also its way of life, biotopic dis
tribution, and other aspects of its biology were studied.
In particular, it was determined that the Fedorov
eelpout reproduce viviparously, just as the European
[1, 2, 11, 30, 31] and the
[6, 25–29] do. Prelimi
nary data on the features of the biology of the Fedorov
eelpout have been published elsewhere [18, 19]. In the
The article was translated by the authors.
present work, the results of the analysis of materials on
the biology of
collected in 2003–2008 in
various areas of the Tauiskya Guba are considered.
MATERIAL AND METHODS
During material sampling, the longest observation
was performed in the summer–autumn season in the
region of the Kul’kuty River estuary of Odhyan Bay in
Tauiskaya Guba (Table 1, Fig. 1). Fish were caught
(usually once a month) by hand under stones, mostly
during the ebb on the exposed site of the riverbed;
some individuals were caught in freshwater pools and
under stones in the littoral zone, about 100 m from the
riverine bed. As well, at the beginning of July, 2003, the
eelpouts were caught with finemeshed nets in the sea
opposite the river mouth at depths of 6–10 m. The
fishes were fixed in 4% formaldehyde and later pro
cessed in the laboratory. The age of most individuals
was determined by their scales and in some fishes by
scales and otoliths. No divergence was revealed in
compared age determinations using both of these
structures (Fig. 2). In the same manner and in similar
biotopes the material was sampled in the mouth of the
Orokholindzha River running into the Tauiskaya
Guba, approximately 10 km to the west from the
mouth of the Kul’kuty River. As well, the Fedorov
eelpout was caught with hook tackle during amateur
ice fishing for smelt in areas of the Nedorazumeniya
and Shelikan islands in March–May of 2006–2008.
Concurrently, large eastern eelpout were caught in
much greater numbers. In total, 784 Fedorov eelpout,
Features of the Biology of the Eelpout
Zoarcidae) from Tauisk Bay, Sea of Okhotsk
E. A. Chegodaeva and I. A. Chereshnev
Institute of Biological Problems of the North, Far East Division of the Russian Academy of Sciences, Magadan 685000 Russia
Received September 15, 2009
—The results of long–term research on the biology of the viviparous Fedorov eelpout
from the Tauiskaya Guba in the Sea of Okhotsk are generalized. It was determined that in winter and
spring this species inhabits strongly freshened sea areas and in summer and fall it inhabits, as a rule, estuarine
areas in the tide effect zone.
did not leave the coastal zone, even during the ebb, and could remain
in colder fresh water up to 12 h a day. Data on the age, sexual and size structure of the catches, character of
linear growth, increase in body mass and fecundity, size, as well as the growth rates of the larvae and fry during
prenatal development of
Fedorov eelput, Tauiskaya Guba, Sea of Okhotsk, biotope distribution, size, age, growth, vivipa
rous, fecundity, larvae, fry, development.