ANNUAL DYNAMICS OF THE AGE STRUCTURE AND DEVELOPMENT CYCLE OFEURYTEMORA LACUSTRIS (POPPE, 1887) IN LAKE VECHELIE (BELARUS)

Authors

  • A. G. Litvinova State Scientific and Production Amalgamation ‘‘The Scientific and Practical Center for bioresources The National Academy of Sciences of Belarus’’, 27, Akademicheskaya str., 220072 Minsk, Belarus Автор
  • V. V. Vezhnavets State Scientific and Production Amalgamation ‘‘The Scientific and Practical Center for bioresources The National Academy of Sciences of Belarus’’, 27, Akademicheskaya str., 220072 Minsk, Belarus Автор

Keywords:

copepoda, development, population numbers, age structure, nauplii, copepodites, generation, oviparous females

Abstract

We have researched the development cycle of relic kalanoid copepods Eurytemora lacustris (Crustacea, Copepoda) in the conditions of basins in Belarus (by the example of Lake Vechelie). Seasonal variations have been determined in
population density of the copepods, the absolute and relative population numbers in all stages of development, eugamic males and oviparous females. on the basis of the obtained data a conclusion is drawn that there are two generations of E. lacustris during a year, at that one of them starts developing in late winter when the temperature is low which confirms
this is a cold-loving species.

The process of Eurytemora lacustris reproduction is extended in time for several months due to uneven maturing of individuals of the population. The periods of developments also are influenced by annual changes of habitation conditions.
As a result, generations of the given species overlap each other and are fixed not very clear.

Fig. 7. Ref.: 13 titles.

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Published

2015-09-01

Issue

Выпуск 3. Сентябрь 2015 года

Section

БИОЛОГИЧЕСКИЕ НАУКИ Общая биология

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