Reproduction en captivité du rouget (mullus surmuletus)

In order to develop an intensive marine fish production, it is necessary to obtain in a first time the captive spawners maturation. The results presented herein show that red mullus mullus surmuletus is an easy species for acclimatization in 20 m3 tanks : only one year after seining the fish in a breton coastal pond, several spawns were produced each year between 1975 and 1983, at the same period : April to beginning of 3une. The average number of eggs corresponding to one oviposition is estimated to 33 000. The diameter of fecund eggs is small : 0.81 to 0.94 mm. Their mean viability appears to be high : 90 %, as the hatching rate : 95 % obtained from viable eggs, at constant temperature (13 ± 0.5°C). In these conditions larval deformities get up rarely higher than 5 %. On the other hand, short thermal shocks (17°C) and light chlorination (1 ppm) affect embryogenesis and larval normalities.