While conducting chronic toxicity tests sublethal effects are endpoints that are looked at. Short-term sublethal tests are used to evaluate the toxicity of effluents to aquatic organisms. This suggests that sublethal imidacloprid causes colony failure through reduced colony function. Clearly the starfish experience various levels of sublethal predation. In sublethal doses, they have an insect-repellent effect. This is an example of a physiological sublethal effect leading to ecological death. This is an example of a behavioral sublethal effect leading to ecological death. This is another example of a behavioral sublethal effect that leads to ecological death. Sublethal uptakes are drastically reducing marine bird and mammal populations. Sublethal doses can affect orientation, foraging, learning ability and brood care. Sublethal doses of insecticides (i.e. imidacloprid and other neonicotinoids) affect bee foraging behavior.