Effects of enriched Artemia urmiana with polyunsaturated fatty acids and vitamin C on reproductive performance and larval temperature stress resistance of Severum Heros severus

Abstract

ABSTRACT The influence of enriched adult Artemia urmiana with essential fatty acids (EFA) and vitamin C on aquarium-raised Severum Heros severus reproductive performance, larval resistance to high temperature stress (34°C), and intervals between each spawning were determined. Broodstock were fed with formulated pellet diet (P), P + adult Artemia, Artemia + EFA (30%), Artemia + EFA- +0.5 g vitamin C and Artemia + EFA +1 g vitamin C for 10 weeks. Results indicated that enriched Artemia with EFA + 1 g vitamin C had significantly higher larval resistance to high temperature, and shorter intervals for the eight spawning cycles than the other experimental diets. Artemia + EFA +0.5 g vitamin C resulted in higher fertilization and hatching rates than the other treatments. Our results indicated that feeding live feed reduced the whole time for the eight spawning cycles, increased reproductive performance, decreased the interspawning time, and increased the larvae quality in terms of resistance to stress and higher survival rate.