TY - JOUR
T1 - Effect of dietary protein source and time on alkaline proteolytic activity of Nile tilapia (Oreochromis niloticus)
AU - González-Félix, Mayra L.
AU - Castillo-Yañez, Francisco J
AU - Ocaño-Higuera, Victor M
AU - Perez-Velazquez, Martin
AU - Cota-Moreno, Venecia
AU - Lozano-Taylor, José
PY - 2010/9
Y1 - 2010/9
N2 - A 4 × 3 factorial study was conducted to evaluate the effect of four experimental diets (a control diet and a 0, 50, and 100% fish meal replacement diet) and the period of time Nile tilapia, Oreochromis niloticus, were fed those diets (0, 20, and 40 days) on the alkaline proteolytic activity of the animals' digestive tract, as well as their potential interaction. Significant differences (at P < 0.05) and a significant interaction were observed among dietary treatments for the alkaline proteolytic activity of tilapia after 40 days of feeding. This study confirmed that, under these experimental conditions, a 50% fish meal replacement formulation elicited the highest alkaline proteolytic activity in the digestive tract of tilapia, which resulted in the highest final weight and specific growth rate (SGR), but further research is needed to establish the relative contribution of the alkaline proteases to the overall proteolytic activity of this omnivorous fish species.
AB - A 4 × 3 factorial study was conducted to evaluate the effect of four experimental diets (a control diet and a 0, 50, and 100% fish meal replacement diet) and the period of time Nile tilapia, Oreochromis niloticus, were fed those diets (0, 20, and 40 days) on the alkaline proteolytic activity of the animals' digestive tract, as well as their potential interaction. Significant differences (at P < 0.05) and a significant interaction were observed among dietary treatments for the alkaline proteolytic activity of tilapia after 40 days of feeding. This study confirmed that, under these experimental conditions, a 50% fish meal replacement formulation elicited the highest alkaline proteolytic activity in the digestive tract of tilapia, which resulted in the highest final weight and specific growth rate (SGR), but further research is needed to establish the relative contribution of the alkaline proteases to the overall proteolytic activity of this omnivorous fish species.
KW - Alkaline proteolytic activity
KW - Dietary protein
KW - Digestive enzymes
KW - Nile tilapia
UR - http://www.scopus.com/inward/record.url?scp=77955854443&partnerID=8YFLogxK
U2 - 10.1007/s10695-009-9352-4
DO - 10.1007/s10695-009-9352-4
M3 - Artículo
C2 - 19728128
SN - 0920-1742
VL - 36
SP - 779
EP - 785
JO - Fish Physiology and Biochemistry
JF - Fish Physiology and Biochemistry
IS - 3
ER -