Abstract
A detailed analysis of two euplanktonic populations carried out in the same period, 18 May–11 August, 1978, in two neighboring Mazurian lakes revealed different patterns of changes in population densities and significant differences in fecundity, age structure and mean sizes of individuals despite similar epilimnion temperatures in the lakes. Similar densities were maintained in both populations although food limitation was less important and predation more intense in one than in the other of the two lakes. The relative importance of food limitation and predation is discussed in lakes of low and high fertility. It is also suggested that both low food concentration and high selective predation pressure favors small clutch sizes in cladocerans.
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Gliwicz, Z.M., Ghilarov, A. & Pijanowska, J. Food and predation as major factors limiting two natural populations of Daphnia cucullata Sars. Hydrobiologia 80, 205–218 (1981). https://doi.org/10.1007/BF00018359
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DOI: https://doi.org/10.1007/BF00018359