Journal of Aquaculture Research & Development

Mohamed A El-Absawy

Publications

• Research Article
  Red Tilapia Broodstocks and Larval Production Under Different Water Salinities Without Acclimation
  Author(s): Ghada R Sallam, Walied A Fayed, Mohamed A El-Absawy, Hadir A Ali and Zeinab A El-Greisy Ghada R Sallam, Walied A Fayed, Mohamed A El-Absawy, Hadir A Ali and Zeinab A El-Greisy
  
  The direct transfer of fish to marine water without acclimation is considered critical on survival rate of fish. Florida red Tilapia, Oreochromis sp., was introduced to four salinity levels (9‰, 18‰, 24‰ and 36‰) and a control freshwater treatment in pre-spawning period to investigate the tolerance of the offspring to direct transfer to marine water without acclimation. Fish were stocked at a rate of 25/m3 with initial body weight of 29.4 ± 0.12 g for six weeks as acclimation period. Broodstocks after acclimation were then stocked at 5/m3 and fed to satiation with 25% crude protein commercial diet for 24 weeks as spawning period. Offsprings survival and growth were compared for their tolerance to three salinity levels (9‰, 18‰ and 36‰) in indoor concrete tanks with stocking density of 1000/m3, and fed on 30% crude protein (470 kc.. View More»
  DOI: 10.4172/2155-9546.1000476

  Abstract PDF