Common carp fry survival during salinity stress test: effect of feeding regime - short communication.

Experiments were carried out on common carp (Cyprinus carpio L.) larvae in a recalculating aquatic system for a period of 21 days. Four feeding variants with different transition times from live (nauplii of Artemia salina) to artificial feed (Biomar larviva) were examined. The greatest average total length (25.72 ± 3.37 mm) and weight (213.81 ± 105.52 mg) was achieved by common carp larvae fed over the whole period with nauplii of the brine shrimp (group D). A significantly higher (P<0.05) final bodyweight was reported in group D in comparison with groups A and B. Survival in groups B, C and D was high (81.53, 84.14, 80.66% respectively) but not in group A (32.44 - 43.36%) with the earliest transition to artificial feed. A salinity stress test was carried out on the final day of rearing. Common carp fry survival in the salinity stress test was analyzed using the Kaplan - Meier test. High significant differences (P<0.001) have only been reported between feeding treatments at 14‰ salinity level.