31. For prime conditioning ( especially if captive reproduction is to be attempted ) live foods such as " Daphnia " should be offered. 32. Over time, however, Daphnia adapted to be able to feed on the blue-green algae, helping to control it in the lake. 33. The bream are then forced to live by filter feeding with their gill rakers, " Daphnia " water fleas being the main prey. 34. It can take as long as 6 months to raise fry to juvenile sizes where they are capable of eating live daphnia on a regular basis. 35. Two experimental systems are used in Murdoch's research : the " Aphytis "-California Red Scale and daphnia -algae systems. 36. A study showed that " Daphnia pulicaria " is competitively superior to " D . lumholtzi " in the absence of predators. 37. The inflexion point in the " Daphnia " population density graph occurred at half the carrying capacity, as predicted by the logistic growth model. 38. In this condition the tentacles are very difficult to see with the naked eye and are often only revealed when a prey animal such as Daphnia is caught. 39. More fish tended to disperse in the patch with less daphnia ( the sought after food source ) and the more abundant patch had a shortage of visitors. 40. FAO described thiamethoxam as non-toxic to fish, daphnia and algae, mildly toxic for birds, highly toxic to midges and acutely toxic for bees.
