Dietary Mg requirements reported for terrestrial and aquatic
animals vary greatly. Terrestrial animals acquireMg by ingesting plants
and since plant-derived feed normally contains significant amounts of
Mg becauseMg is a constituent of chlorophyll, terrestrial animals ingest
adequate amounts ofMg. On the other hand, aquatic animalsmay require
additional dietary Mg, unless the water contains sufficient amounts of
Mg. For example, rearing water that contains 46 mg Mg/L meets the Mg
requirement for a rainbow trout that was fed a diet with 78 mg/kg
endogenousMg