Nutritional Score

Dietary digestibility and the influence of food components on gastric evacuation in plaice, Pleuronectes platessa L.

“…Similar results have been previously reported by Cowey et al (1974) and Birkett (1969) found that over 90% of the protein nitrogen was absorbed from natural foods by yearling plaice. Therefore, diets containing animal proteins tend to have higher digestibility ratios than those with plant proteins and from a survey of published data it appears that this is of general occurrence amongst carnivorous species (Hastings, 1969;Halver, 1972). When indigestible carbohydrate (raw starch) was included in the dietary formulation there was not only a reduction in digestibility of total energy, probably due to the low level of amylotic activity in the plaice gut (Bayliss, 1935;Cowey et al, 1974), but also a reduction in protein digestion and absorption.…”

Digestibilité des protéines et disponibilité des acides aminés de quelques matières premières chez le bar (Dicentrarchus labrax)

“…Des (Kim, 1974) ont été calculés selon les formules : CA : % Cr 2 0 3 dans l'aliment ; NA : % nutriment dans l'aliment ; Cf : % Cr 2 0, dans les fèces; Nf: % nutriment dans les fèces; C'a : % Cr 2 0, dans l'aliment protéiprive ; N'a : % nutriment dans l'aliment protéiprive ; C'f : % Cr 2 0 3 dans les fèces provenant du régime protéiprive ; N'f : % nutriment dans les fèces provenant du régime protéiprive. Les (Hastings, 1969 ;Smith et al, 1980 ;Cho etal., 1982 …”

The influence of cellulose filler on feeding, growth and utilization of protein and energy in rainbow trout, Salmo gairdnerii Richardson

“…Proteins and lipids are of variable digestibility. In general, hard fats are less digestible than oils and plant proteins are less digestible than animal proteins (Hastings, 1969;Halver, 1972;Nose, 1979;Jobling, 198 1). Heat damage during diet processing can seriously reduce protein digestibility, as can the presence of certain types of fillers (Smith, 1971(Smith, , 1979Spinelli et al, 1979;Jobling, 1981).…”