ISSN 1063-0740, Russian Journal of Marine Biology, 2009, Vol. 35, No. 1, pp. 25–33. © Pleiades Publishing, Ltd., 2009.
Original Russian Text © S.Sh. Dautov, M.S. Selina, 2009, published in Biologiya Morya.
It is difﬁcult to understand how any community can
exist without analysis of its components. Producers,
which generate primary production using light energy,
carbon dioxide and microelements, form the bulk of a
planktonic community. Meroplankton, and especially
echinoderm larvae, are related to consumers of the ﬁrst
type, and feed on phytoplankton, participating in the
process of substance and energy transfer. The dynamics
and species diversity of echinoderm planktotrophic lar-
vae in the area between the mouth of Tumannaya River
and Kalevala Bight were described earlier [1, 3]; it was
also shown that they are a substantial portion of
meroplankton there . Species diversity and high
abundance of phytoplankton were noted to be typical
for the studied area in July and August .
MATERIAL AND METHODS
Mero- and phytoplankton samples, collected in the
area of the southwestern part of Peter the Great Bay,
Sea of Japan, in July and August of 1996 according to
the uniform network of stations (Fig. 1), were used as
material for this work. Meroplankton was collected
using a Juday net; phytoplankton samples were col-
lected using a bathometer with a 0.5 m horizon.
The diet of larvae was calculated using the follow-
= 3.14; C is the abundance of phytoplankton; d
is the lateral size of a larva (arm length of pluteus or
body width of auricularia or bipinnaria); v is the mean
swimming rate of a larva; and t is the lifetime of a larva.
Maps of phytoplankton and echinoderm larvae dis-
tribution in the area were made using Surfer v. 8 soft-
ECOLOGY OF PLANKTON
Foraging Conditions of Planktotrophic Larvae of Echinoderms
in the Southwestern Part of Peter the Great Bay
of the Sea of Japan
S. Sh. Dautov
and M. S. Selina
Zhirmunskay Institute of Marine Biology, Vladivostok, 690041 Russia
Received January 31, 2008
—Foraging of planktotrophic larvae of echinoderm common species in the Peter the Great Bay (Sea
of Japan) was estimated on the basis of distribution of phyto- and meroplankton. The diversity and abundance
of phytoplankton in the studied area in summer months were shown (141 algae species; abundance—up to
; biomass—more than 2.7 g/m
of fresh weight). It was found that in Peter the Great Bay the
diet of echinoderm larvae depended on their feeding behavior, duration of their pelagic stage, and abundance
and size composition of phytoplankton, included up to several micrograms of fresh algae per larva.
: meroplankton, phytoplankton, trophic relationships, feeding habits.
Peter the Great Bay
Location of stations of mero- and phytoplankton
sampling (circles) on the area of Peter the Great Bay.