| Popis: |
This study examined the effect of water that previously contained fish on several life history traits of the small-bodied cladoceran Ceriodaphnia cf. dubia. Four fish density treatments were tested (i.e. 16.7, 5.9, 2 and 0.9 l fish‐1). A significant (P 0.05) cladoceran survival. The observed effects are ascribed to the presence of unidentified substances in the water that previously contained fish. These substances are thought to be ‘fish kairomones’. While life history changes occur in the laboratory, it remains unclear whether similar changes would occur in the field. |
