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Preliminary experiments on the artificial feeding of mugilidae
Premiers essais de nutrition artificielle chez les Mugilidae
Helgoländer wissenschaftliche Meeresuntersuchungen volume 20, pages 610–619 (1970)
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Les principales caractéristiques de la nutrition artificielle sont étudiées chez de jeunesMugil auratus etMugil capito. Nous soulignons l'importance de la teneur en protéines dans l'aliment chez les alevins et la nécessité des glucides chez les individus plus âgés. L'urée est susceptible d'être utilisée comme source d'azote non indispensable pour maintenir un poids constant chez des animaux à jeûn. La ration journalière d'entretien à 15° C s'élève à 0,92 Cal. pour un poisson de 10 g et une ration de 1,88 Cal. assure une croissance en poids de 7,3 % en trois semaines. L'incorporation de cellulose dans l'aliment diminue la croissance en élevant le taux de conversion. Au cours d'expériences de nutrition à salinités contrôlées, il est apparu que l'élevage en eau de mer diluée (S=20 ‰) permet une meilleure utilisation de l'aliment.
Summary
1. A diet rich in proteins is necessary for the growth of very youngMugil auratus andM. capito (standard length: 21 mm). As soon as the natural change of diet occurs, a smaller quantity is sufficient.
2. The nature of proteins, incorporated in the food, does not seem to influence conversion rates.
3. Under conditions of complete starvation, a solution of urea at a concentration of 4 g/l reduces weight loss in youngMugil capito (1.5 % instead of 23 % loss after 9 day's starvation).
4. At 15° C, 10 gMugil auratus require a daily maintenance ration of 0.92 Cal; a ration of 1.8 Cal facilitates a higher growth efficiency (7 % in 3 weeks).
5. The addition of non-assimilable components reduces the rate of utilization of assimilable food substances.
6. Salinity influences food conversion rate. A salinity of 20 ‰ affords maximum growth and highest efficiency of food turnover.
Literature cited
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Vallet, F., Berhaut, J., Leray, C. et al. Preliminary experiments on the artificial feeding of mugilidae. Helgolander Wiss. Meeresunters 20, 610–619 (1970). https://doi.org/10.1007/BF01609933
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DOI: https://doi.org/10.1007/BF01609933