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Nitrogen and Phosphorus Balance of Grass Carp, Ctenopharyngodon idella, Fed Elodea, Egeria densa
Author(s) -
Stanley Jon G.
Publication year - 1974
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1974)103<587:napbog>2.0.co;2
Subject(s) - grass carp , phosphorus , biology , hydrocharitaceae , botany , elodea canadensis , aquatic plant , agronomy , fishery , chemistry , fish <actinopterygii> , ecology , macrophyte , organic chemistry
The herbivorous grass carp fed winter elodea exhibited a negative nitrogen balance in metabolism, suggesting that food having a higher protein content would be required for normal growth. About a third of the phosphorus contained in food was retained; hence, a combination of aquatic plants and grass carp might afford an effective biological method for removing phosphorus from water. Water quality was altered by the excretion of ammonium and orthophosphate by grass carp. Even though the grass carp might be useful in removing some phosphorus from water, its principal impact was to increase the rate of recycling of nitrogen and phosphorus.