Variation in the Parameters of the Life Cycle in Prawns of the Genus MacrobrachiumBate (Crustacea, Palaemonidae) |
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Authors: | A V Alekhnovich and V F Kulesh |
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Institution: | (1) Institute of Zoology, National Academy of Sciences of Belarus, Akademicheskaya ul. 27, Minsk, 220072, Belarus |
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Abstract: | Variations in the parameters of the life cycle in freshwater prawns of the genus MacrobrachiumBate and some populations of the species Macrobrachium nipponense(De Haan) were analyzed comparatively. Using factor analysis, these parameters were systematized and expressed through two factors. The first factor is related to the parameters of larval development and the dimensions of an egg, and the second, to the length of adults and their fecundity. The greatest differences in the values of intrageneric and intraspecific variation of parameters are noted for the dimensions of larval stages. It is assumed that the formation of a species proceeds primarily through the appearance of adaptations at larval stages. |
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Keywords: | freshwater prawns variation duration of development fecundity larvae adults |
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