...词 : 表型可塑性 ; 浮游动物 ; 溞类 ; 捕食风险 ; 信息素 [gap=1578]Keywords: Phenotypic plasticity; zooplankton; Daphnia; predation risk; kairomones ...
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狮泉河的枝角类和桡足类种类很少，所采样品仅检出枝角类5科8属18种，优势种类为尖额溞和盘肠溞；
The species of cladoceran and copepod in Shiquan River are fewer. From the specimens we observed 5 families 8 genus 18 species of cladoceran and the dominant species are A.
期中华绒螯蟹溞状幼体可捕食桡足类无节幼体，且捕食量随着无节幼体密度增加而变大（P<0.01）；
Third stage zoae(Z_3)could prey on the copepods nauplii, and the feeding amount was increased with the increasing density of the nauplii(P<0.01).
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