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Food utilization in the fishTilapia mossambica fed on plant and animal foods
Die Nahrungsausnutzung des FischesTilapia mossambica bei pflanzlicher und tierischer Kost
Helgoländer wissenschaftliche Meeresuntersuchungen volume 28, pages 66–70 (1976)
Kurzfassung
Die Nahrungsausnutzung des herbivoren FischesTilapia mossambica wurde bei unterschiedlichem Futterangebot untersucht. Als Nahrung dienten die GrünalgeSpirogyra maxima, Ziegenleber und lebende Kaulquappen. Mit Algennahrung allein konnten Jungfische ihren Energiebedarf nicht decken. Wurde darüber hinaus Ziegenleber verfüttert, so erhöhte sich sowohl die aufgenommene Nahrungsmenge als auch die Nahrungsausnutzung. Maximale Konversionsraten wurden bei ausschließlich tierischer Kost erzielt.
Summary
1. When fed rations ranging from 4 to 29 mg (dry)Spirogyra maxima/g live fish/day, absorption efficiency ofTilapia mossambica increased from 50 to 78%; the youngT. mossambica could not consume and utilize sufficient algae to meet its metabolic energy requirement.
2. On supplementing the algal food with goat liver, the fish consumed not only more food (38 mg/g/day) but also enhanced the absorption efficiency to 94%.
3. Given only the liver pieces, the fish consumed 47 mg-g-day; it displayed 95 and 30% of absorption and conversion efficiencies. However, the fish preyed upon and could consume only 41 mg tadpoles/g/day and convert with 26% (K2) efficiency.
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Mathavan, S., Vivekanandan, E. & Pandian, T.J. Food utilization in the fishTilapia mossambica fed on plant and animal foods. Helgolander Wiss. Meeresunters 28, 66–70 (1976). https://doi.org/10.1007/BF01610797
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DOI: https://doi.org/10.1007/BF01610797