Effect of diet (fatty acid and protein) content during spawning season on fertility, eggs and larvae quality of common porgy (Pagrus pagrus, Linnaeus 1758)

Spawning in captivity of two red porgy's broodstock groups (Pagrus pagrus) of the same age was studied during one season. These two broodstock groups, designed A and B, were fed with different regimes during the spawning period. A group was fed on moist pellet while (A diet content 45% proteins, 10% lipids) B group was fed on fresh fish (A diet content 48 % protein, 8.7% lipids). The total eggs collected number for A group was 22 million eggs of which 18 million were viable, fertility was 474,966 eggs kg -1 female. For B group, eggs collected number was 36 million eggs of which 31 million were viable fertility was 769,186 eggs kg -1 female. Statistically, there was a significant difference between the two groups in terms of quantity and quality of spawning and larval survivals recorded on second day after hatching and on fifth day after hatching.