crisis in Republic of Kazakstan did not let Aral Section of Fish
Institute to have scientific work in the whole Aral Sea. In the
last years our organisation was devoting its work only to the
Small Aral Sea. Since 1992 there was no work in the Big Aral Sea.
Due to the financial support from Danish side after the 6 years
break (1992-1998) first time in October 1998 together with
Danish scientists Jan Larsen and specialists from Aralsk section
were spent over-all hydrochemical, toxicological, hydrobiological
and ichthyological exposure in the northern part of the Big Aral
sea ( Tyshibas Bay, Chernyshova) and in the western part of the
Small Aral Sea ( Shevchenko Bay). In the result of scientific
expedition these questions were studied:
routine in the northern part of the Big Aral Sea (temperature,
flowing, transparence, and etc.)
hydrochemical routine ( saltiness, gas routine , oxidation,
of accumulation of toxinís in water in the Aral Sea
of the accumulation pesticides in the organ and tissue of the
basis of the sea ( zooplancton, bentos) and deternmined the
distribution zooplancton, bentos in the Big Aral Sea with
the different salinity in the areas of water.
of providing kambala-glossa with fodder in the condition of
changing salinity routine of the sea,
of kambala-glossa ( size, weight, dynamics of quantity and biomass),
migration of kambala-glossa in the northern part of the Big Aral
Sea, determined the place and time of its concentration.
scientific material during expedition (from the 29th of September
till the 30th of October 1998) totally worked up and prepared
scientific report about value the fishing stock of kambala-glossa
in the Aral Sea by scientists of Aral section of Fish
Institute. In the result of analyses, collected scientific
material about the Aral Sea in October 1998 it is possible to make
indices , dissolved gases and organically things are in the
optimal level for vital activity of kambala-glossa and other water
forming of initial product in the Big Aral Sea in the autumn is
not very high as a result of depressed state of phytoplancton.
progressive growing of salinity is used for Tushibas Bay Big Aral
Sea (67-67.5prml). Under the influence of underground water the
salinity in Bay Chernyshova is less than in Bay Tyshibas
Shevchenko Small Aral Sea is stable level of salinity for last
of salinity from 20 till 56 prml is in optimal for vital activity
of Kampala, adapted in the conditions of the Aral Sea.
of pesticides pollution of the Aral Sea is not high, mostly there
is registered stable chloroorganical pesticides (COP).
of pesticides in the sea is fives flow and atmosphere transfers,
in the muscle tissues there is registered stable chloroorganical
pesticides ( GCSG and DDT) percent of its frequency in the muscles
is low .
level of accumulation of toxins is in the carviar of Kampala .
concentration of pesticides in the muscles of Kampala in October
1998 was lower than in 1991-1992.
in October 1998 the level of concentration of pesticides in
Kampala muscles in the Aral Sea is lower in 2-3 times than maximum
corresponding to norm
for food Fish products,
and biomass of zooplancton and also bentos are higher and this
provides the good
tempo of growing kambala-glossa in the Aral Sea, calculation
showed that at the present time the fishing stock of kambala
-glossa in the Big Aral Sea is about 24.000 tone and in the Small
Aral Sea there is 4.500 tone. Nowadays the stock of Kampala is
enough for organising here effective fishery.
conclusion I would like to say that due to the support from Danish
side and especially providing with high passable transport, after
six years break ( 1992-1998) first time we were able to spend
scientific works on places of the Big Aral Sea which were located
in distance of 400-500 km. from Aralsk city. Jan Larsen brought
with him equipment for determining the exact location of station (
co-ordinate), reservoir for
fixing zooplancton and bentos, equipment for marking Fish that let
us determine Kampala migration.
side we invited high quality specialists, doctor of Geography
Science Ė Amirgaliev N.A. During common work there was constant
changing with information in
toxicological, hydrobiological, and ichthyological fields,
including methods of collecting and working with materials. All
works was spent in atmosphere of mutual understanding and support.
From Aralsk section, there were six people, who had been before on
a leave, without payment for three months. Because of reducing
financing of scientific investigations in the Aral Sea, 5 people
had possibility to return for their scientific works, even for
short period and at the time to earn money for their families.
Process in the ecosystem of the Aral Sea does not have analogue in
the world thatís why results about the autumn scientific works
could interest scientists from different countries.
grateful for Danish for their invaluable contribution in studying
the present ecosystem of the Aral Sea. The continuation of
studying the present ecosystem of the Aral Sea has great
scientific-theoretical and practical meaning. This work will make
invaluable contribution for the fishery importance of the Aral Sea.
of Aral section of Fish Institute