title: The short-term toxicity of some feed additives to different freshwater organisms.
abstract: The short-term toxicity (EC50 respectively LC50 after 2 or 4 days) of 13 feed additives was determined to 4 freshwater organisms of different trophical levels: Chlorella pyrenoidosa, Daphnia magna, Lebistes reticulatus and Salmo gairdneri. The most toxic (LC(EC)50 less than 1 mg/1) were robenidine (to all tested organisms) and stenorol (to Daphnia); moderately toxic (1 less than LC(EC)50 less than 10 mg/1) was pyrimethamine. Amprolium, ethopabate, furazolidone and zoalene proved to be little toxic (LC(EC)50 greater than 10 mg/1); whereas buquinolate, carbadox, clopidol, decoquinate, grofas and sulfaquinoxaline were under the experimental conditions not toxic for the tested organisms.
mesh_terms: D000818:Animals; D002708:Chlorella / Q000502:physiology*; D003621:Daphnia / Q000502:physiology*; D005399:Fishes / Q000502:physiology*; D005503:Food Additives / Q000633:toxicity*; D007928:Lethal Dose 50; D012474:Salmon / Q000502:physiology*
chemical_list: D005503:Food Additives