Open Access

Preliminary experiments on the artificial feeding of mugilidae

  • F. Vallet1,
  • J. Berhaut1,
  • C. Leray1,
  • B. Bonnet1 and
  • P. Pic1
Helgoländer wissenschaftliche Meeresuntersuchungen20:BF01609933

https://doi.org/10.1007/BF01609933

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.

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