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Determination of digestibility coefficients of various feedstuffs for red drum (Sciaenops ocellatus)
66% for meat and bone meal. Phosphorus availability from
88% for wheat. Digestible energy coefficients were high for
absorb the nutrients in animal products more completely than
at 79%. Data from this study indicate red drum can digest and
availability is needed to more precisely formulate diets to
availability of the following ingredients: select menhaden
coefficients ranged from 59% for poultry by-product meal to
conditions. The red drum is an emerging aquaculture species
cottonseed meal, and wheat. Test diets consisting of a 70:30
determine apparent organic matter, protein, lipid, and gross
digestible marker. Organic matter digestibility of
energy coefficients for plant feedstuffs were considerably
energy digestibility coefficients and apparent phosphorus
fish may vary considerably, depending on a variety of factors
fishmeal to 47% for wheat. Crude protein digestibility was
fishmeal, regular-quality menhaden fishmeal, poultry by-
for the digestibility trial, with chromic oxide as the non-
for which information concerning nutrient and energy
fraction increased, ranging between 94% for select menhaden
free extract portion of plant products. These data provide
high for most ingredients, ranging from 77% for regular
including fish species, ingredient quality and processing
ingredients generally decreased as the nitrogen-free extract
lower, from 62% for wheat to 70% for cottonseed meal.
meal to 95% for select menhaden fishmeal; however, digestible
meet their requirements and to enable effective substitution
menhaden fishmeal to 97% for wheat, with the exception of
mixture of reference diet to test ingredient were utilized
more precise information concerning nutrient and energy
of ingredients. This study was conducted with red drum to
Phosphorus availability from animal products was variable,
poultry by-product meal which was 49%. Lipid digestibility
product meal, meat and bone meal, dehulled soybean meal,
reflects their inability to effectively digest the nitrogen-
respectively. Wheat had the highest phosphorus availability
soybean meal and cottonseed meal was 47 and 40%,
substitutions in practical diet formulations based on levels
the animal meals, ranging from 72% for poultry by-product
The availability of nutrients and energy in feedstuffs for
those from plant products. This difference presumably
utilization of red drum and will allow ingredient
with a low of 27% for poultry by-product meal and a high of
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