El Ciclo Diario de la Digestión en Peces Cultivados. Aspectos Funcionales y Metodológicos
Keywords:
Peces, digestión, ritmos diarios, protocolo de alimentaciónAbstract
La eficiencia de la digestión depende entre otros factores de la adecuada relación entre enzima y sustrato, así
como del tiempo de hidrólisis bajo las condiciones apropiadas. La digestión es un proceso temporal que, en
peces, como en otros vertebrados, empieza con la detección del alimento y finaliza con la expulsión de los
desechos. La disponibilidad del alimento en el medio es variable a lo largo del ciclo diario por lo que también
lo es la ingestión y digestión de los nutrientes. Cabe pues esperar que haya momentos óptimos para
suministrar el alimento y que favorezcan su digestión, y momentos más desfavorables en los que se reduciría
la eficiencia de digestión. Por eso, el diseño de protocolos de alimentación más eficientes requiere del
conocimiento previo de los ciclos digestivos. En esta revisión se describirán los estudios realizados en este
sentido y el estado de conocimiento de la función digestiva en relación a los ciclos diarios. Se muestran tanto
los avances en larvas de peces como en juveniles y adultos que presentan diferentes modos de digestión. Dada
la variabilidad entre especies, y la escasez de estudios, la información disponible es aún muy fragmentaria
para definir patrones de actuación.
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