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Nutrient and energy content of freshwater fishes
Author(s) -
Schreckenbach,
Knösche,
Ebert
Publication year - 2001
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2001.00295.x
Subject(s) - dry matter , phosphorus , zoology , biology , nitrogen , nutrient , organic matter , energy density , dry weight , water content , environmental chemistry , ecology , botany , chemistry , physics , theoretical physics , geotechnical engineering , organic chemistry , engineering
The analyses of fresh total body homogenates of 2385 freshwater fishes from 17 species originating in natural waters and aquaculture facilities resulted in average values of 19.1–37.8% dry matter, 13.6–18.3% crude protein, 0.8–18.3% crude fat, 0.16–2.17% nitrogen‐free extracts (NFE), 2.2–2.9% nitrogen and 0.39–1.02% phosphorus. The gross energy content ranged from 3.83 to 11.49 MJ/kg. With increasing fat content in the fishes, water content decreased and dry matter content increased. Through this interdependence, a significant correlation was found between dry matter and crude fat and energy content (r 2 =0.92–0.97). The values of crude protein, crude ash, NFE, nitrogen and phosphorus did not show any significant influence on dry matter content (r 2 =0.0005–0.46). Based on the significant correlation between dry matter and gross energy (gross energy [MJ/kg]=0.0253 dry matter [%] 1.6783 ), the energy content of freshwater fishes can easily be estimated by the dry matter content in the total body.