The investigation of zooplankton and entomofauna on the White Sea islands.

Glagolev  S.M., Chava V., Yufryakov  I.

Glagolev  S.M., Chava  V., Jufrjakov  I. Investigation of zooplankton and entomofauna in freshwater puddles on the White Sea islands // The materials of the White Sea Expedition of Moscow South-West High School. Vol. 2 [Electronic resourse]. 2002. Mode of access:

[Russian text]

Our main games were:
1. to describe the fauna of freshwater puddles on the White Sea islands and to compose the list of species, living there;
2. to investigate the connection between species composition and abiotique (dimensions, location above the sea; pÍ; electro-conductivity) and biotique (vegetation, birds's influence) factors;
3. to trace the changing of species composition and vacillation of numbers during the season exploring the puddle every 3-5 days;
4. to trace the changes exploring the puddle from year to year.

The description of a ðuddlå was made in the following way:
-we selected the puddle;
-abiotique and biotique factors were registered;
-the definition of zooplankton was held;
and, if it was necessary,
-the sample was taken;
-the mark was put.
54 pools were described in such à way (island Skeletov, is. Vichennaja Luda, is. Luda Ozhidanija, is. Sedlovataya Luda, is. Cheremshiha, is. Odinokaja Srednjaja Luda).

The samples of zooplankton and insects should be distributed by groups and determined later in Moscow.

Some facts were marked:
-the larvae of flying insects (for example Chiromidea) live almost in all studied puddles;
-Daphnia magno inhabits pools with sulinity of up to 4,5 promille;
-in the puddles with square of 4 or less square meters entomofauna was represented by small (less than 5 mm) beetles from family Direxsidea and from family of Corixsidea. In the ladger puddles beetles from family of wàtåã-dear and larvas dragon-fly fly also were found.

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