Effect of ration level and food type on the growth, ammonia excretion and phosphate excretion by the goldfish Carassius auratus (L.)

aliment pour animaux ammonia ammoniac azote carpa dorada excretion feed intake feeds fosfatos fosforo goldfish growth rate nitrogen phosphate phosphates phosphore phosphorus piensos prise alimentaire (animaux) raciones ration rations taux de croissance