1063-0740/05/3104- © 2005 Pleiades Publishing, Inc.
Russian Journal of Marine Biology, Vol. 31, No. 4, 2005, pp. 256–260.
Original Russian Text Copyright © 2005 by Biologiya Morya, Silina, Latypov.
In the literature there is no information about the
populations of the Japanese scallop,
(= Patinopecten) yessoensis
, developing in open sea
areas that are not protected against southeastern sum-
mer monsoons. Scientists probably did not imagine that
a stable population of such an unattached species as the
Japanese scallop (which has a shell area of about 1 dm
i.e., a great “windage”) could exist under the conditions
of an open coastal area. Migratory aggregations of sed-
imentary materials of different origins (sand, aleurites,
biogenic components), which make up the spit and sub-
marine slope to the south off Ostrovok Fal’shivyi Cape
up to the mouth of the Tumannaya River, fall into the
most highly dynamic zone and are prone to the almost
continuous effects of waves and coastal currents .
The ﬁnding by A.S. Sokolovskii in 2000 of several
thousand scallops stranded after a very strong typhoon
onto an alluvial  sandy shore to the south of Ostro-
vok Fal’shivyi Cape was clear evidence that a popula-
tion of Japanese scallop existed in that area. In this con-
nection, we attempted to locate the population of Japa-
nese scallop in the southwestern part of Peter the Great
Bay, neighboring on the mouth area of the Tumannaya
River, and to study the structure and condition of this
population. Moreover, it was projected to compare the
composition of scallop in the bottom population and in
the coastal wreckage after typhoons and to evaluate the
damage caused by monsoons to the scallop population
located in an unprotected area.
Population Dynamics of the Japanese Scallop
(Bivalvia) Under Conditions
of Enhanced Hydrodynamics
A. V. Silina and Yu. Ya. Latypov
Institute of Marine Biology, Far East Division, Russian Academy of Sciences,
Vladivostok, 690041 Russia
e-mail: email@example.com; firstname.lastname@example.org
Received December 21, 2004
—A population of the Japanese scallop,
, found in the open area of Peter the
Great Bay (Sea of Japan), which was not protected against southeastern summer monsoons, has been studied.
Specimens of different ages, from 1 year old to 11 years old, were found in the population. According to a pro-
visional estimation, the total reserve of the Japanese scallop in the population reached 30 000 specimens. After
strong typhoons, up to 6 000 specimens were stranded along the shoreline. Even after repeatedly occurring
typhoons observed during one particular summer season, the population of
remained rather sta-
ble, although its age structure demonstrated both uneven annual recruitment in the population and different sur-
vival rates in different generations. Specimens of the highly productive generation of 1999 constituted the bulk
of the bottom population and coastal wreckage. At older ages, the probability for the Japanese scallop to be
stranded during a storm decreases signiﬁcantly.
benthos, coastal zone, growth, mollusks, population dynamics.
Peter the Great Bay
Schematized map of sampling points for the Japa-
, in southwestern
Peter the Great Bay, Sea of Japan. (
) Bottom site; (
sites of coastal wreckage of mollusks after storms.