مقال بحثي وصول مفتوح
In February, 2008, 12000 fries of monosex red tilapia hybrid (Oreochromis SPP) of 0.2 g and 12000 fries of monosex Nile tilapia (Oreochromis niloticus) of 0.5 g were imported from a hatchery in South East Asia and stocked in concrete raceways at an agriculture farm in the Barka Region about 80 km from Muscat. Three day …
مقال بحثي وصول مفتوح
… is study, changes in gill structure and mucus cell distribution were examined when juvenile Nile tilapia, Oreochromis niloticus, were exposed to chronic and acute concentrations of ammonia. For chronic exposure, the tilapia were exposed to daily increments in ammonia concentration rising from 0 mg L-1 ammonia on Day 0 …
مقال بحثي وصول مفتوح
Age, growth, mortality, relative yield-per-recruit and relative biomass-per-recruit of Oreochromis aureus and Tilapia zilli collected from Wadi EI-Raiyan lakes during the period from August 2000 until July 2001 have been estimated. Age was determined from scale readings and the results showed that the maximum life span …