Competitive Ability of Differently SizedDaphniaSpecies: An Experimental Test
作者： Utz Tillmann , Winfried Lampert
DOI: 10.1080/02705060.1984.9664609
关键词: Offspring 、 Ecology 、 Food resources 、 Reproduction 、 Test (biology) 、 Daphnia 、 Limiting 、 Biology 、 Zoology 、 Aquatic science 、 Ecology, Evolution, Behavior and Systematics
摘要: ABSTRACT Growth and reproduction of three different-sized Dahnia species were measured under increasing competitive conditions. Only when food was not limiting, the largest D. magna superior to both smaller with respect total production offspring. This advantage disappeared availability decreased. Under limiting conditions all had similar rates production; thus, they utilized available resources same efficiency. Finally, at lowest concentration no longer able reproduce, but smallest species, longispina, still produced eggs. Therefore, contrary “Size Efficiency Hypothesis.” best competitor.
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