Respuesta productiva de la trucha arcoiris (Oncorhynchus mykiss) frente a distintas tasas de alimentaciĆ³n
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Fecha
1997
Autores
Profesor/a GuĆa
Facultad/escuela
Idioma
es
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Universidad AndrƩs Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Se estudiĆ³ el efecto de distintas tasas de alimentaciĆ³n (1,4- 1,7- 2,0%)
de una dieta extruida para la fase de engorda en trucha arcoiris
(Oncorhynchus mykiss) tipo pan- size, desde los 70 +/- 5 gr. por 90 dĆas, evaluando su
respuesta productiva, rendimiento de la canal, composiciĆ³n quĆmica corporal,
mortalidad, Ćndice de condiciĆ³n y conveniencia econĆ³mica del uso de restricciĆ³n
alimenticia.
La respuesta productiva se evaluĆ³ a travĆ©s de las variables peso vivo, ganancia de
peso, consumo de alimento, eficiencia de conversiĆ³n alimenticia y tasa de crecimiento
diario.
Se encontraron diferencias estadĆsticamente significativas (P < 0,05 ) a favor del
grupo alimentado al 1,4% , para consumo de alimento y eficiencia de conversiĆ³n
alimenticia.
Para las variables ganancia de peso y tasa de crecimiento diario los resultados
fueron similares para los grupos con mayores tasas de alimentaciĆ³n; sin embargo,
ambos evidenciaron diferencias estadĆsticamente significativas (P < 0,05 ) , respecto
al tratamiento alimentado al 1,4%.
El rendimiento de la canal, la mortalidad y el Ćndice de condiciĆ³n no presentaron
diferencias significativas (P > 0,05) entre los tres tratamientos.
La composiciĆ³n quĆmica de los filetes no se vio afectada en cuanto al nivel de
proteĆnas (P > 0,05 ); sin embargo, se observĆ³ diferencias estadĆsticamente
significativas (P < 0,05 ) en el tenor graso entre el grupo de mayor alimentaciĆ³n frente a
los restantes tratamientos.
El anĆ”lisis de costos evidenciĆ³ diferencias estadĆsticamente significativas
(P < 0,05 ) en los tres grupos, siendo el tratamiento con menor tasa de alimentaciĆ³n el
que logrĆ³ inferiores costos en la producciĆ³n del kg. de trucha bruto y neto.
It was studied the effect of different feeding rates (1.4 %, 1.7 %, 2.0 % ) by extruded diet for a fat phase in rainbow trout type 11 pan - size 11 from 70 +/- 5 gr. per 90 days, evaluating the productive response, productivity sluice, bodily chemistry composition, mortality, condition index and economic convenience of the use of feeding restrictions The productive response was evaluated through the variable body weight, gaining weight, food consumption, feeding conversion efficiency, and daily growth rate. Statistically significant differences (P < 0.05 ), were found in the 1.4% feeding group, for food consumption and conversion efficiency. In the variables weight gain and daily growth rate, the results were similar for the group with greater feeding rate, however, both showed significant statistically differences (P < 0.05) compared with the 1.4% feeding treatment. The productivity of the sluice, the mortality and condition index showed no significant differences (P > 0.05 ) between the three treatments. The chemistry composition of the fillets was not affected in the case of protein level ( P > 0.05 ), however, it showed significant statistically differences ( P < 0.05 ) in the lipidic level in the group of greater feeding compared with the remaining treatments. The cost analysis showed significant statistical differences ( P <0.05) in the three groups, and the treatment
It was studied the effect of different feeding rates (1.4 %, 1.7 %, 2.0 % ) by extruded diet for a fat phase in rainbow trout type 11 pan - size 11 from 70 +/- 5 gr. per 90 days, evaluating the productive response, productivity sluice, bodily chemistry composition, mortality, condition index and economic convenience of the use of feeding restrictions The productive response was evaluated through the variable body weight, gaining weight, food consumption, feeding conversion efficiency, and daily growth rate. Statistically significant differences (P < 0.05 ), were found in the 1.4% feeding group, for food consumption and conversion efficiency. In the variables weight gain and daily growth rate, the results were similar for the group with greater feeding rate, however, both showed significant statistically differences (P < 0.05) compared with the 1.4% feeding treatment. The productivity of the sluice, the mortality and condition index showed no significant differences (P > 0.05 ) between the three treatments. The chemistry composition of the fillets was not affected in the case of protein level ( P > 0.05 ), however, it showed significant statistically differences ( P < 0.05 ) in the lipidic level in the group of greater feeding compared with the remaining treatments. The cost analysis showed significant statistical differences ( P <0.05) in the three groups, and the treatment
Notas
Tesis (Ingeniero en Acuicultura)
El archivo de la tesis presenta manchas y marcas de correcciones en el texto de origen.
El archivo de la tesis presenta manchas y marcas de correcciones en el texto de origen.
Palabras clave
Trucha Arco Iris, AlimentaciĆ³n, Chile