A larval stage of certain tapeworms that typically develops in the body cavity of a copepod.
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.
The results indicated that different copepods at same natural acclimated temperature and specific copepod at different initial acclimated temperature had different thermal tolerance capability.
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