AGE AND GROWTH STUDIES OF PICARELS (SPICARA FLEXUOSA AND SPICARA SMARIS) IN THE EGYPTIAN MEDITERRANEAN WATERS
AGE AND GROWTH STUDIES OF PICARELS (SPICARA FLEXUOSA AND SPICARA SMARIS) IN THE EGYPTIAN MEDITERRANEAN WATERS By s. I. RIZKALLA* *National Institute of Oceanography and Fisheries, Kayet Bay Alexandria-Egypt Key-words: Picarels, Spicara jIexuosa, Spicara smaris, Age Growth ABSTRACT Age and growth ofthe Egyptian Mediterranean picarels (S. flexuosa and S. smaris) were examined by means of […]
SPAWNING AND LARVAE PRODUCTION IN NILE TILAPIA (OREOHORMIS NILOTICUSj BREEDERS UNDER DIFFERENT FEEDING REGIMES.
SPAWNING AND LARVAE PRODUCTION IN NILE TILAPIA (OREOHORMIS NILOTICUSj BREEDERS UNDER DIFFERENT FEEDING REGIMES. BY M. A. ESSA* *National Institute of Oceanography and Fisheries, Alexandria, Egypt. Key words: Fish Reproduction, Nile Tilapia. ABSTRACT Reproductive performance and production of Nile tilapia, Oreohormis niloticus, larvae were tested under two different feeding regimes. The results indicated that, there […]
SEASONAL VARIATIONS IN CHEMICAL AND MINERALOGICAL PROPERTIES OF QARUN LAKE SEDIMENTS
SEASONAL VARIATIONS IN CHEMICAL AND MINERALOGICAL PROPERTIES OF QARUN LAKE SEDIMENTS BY R. M. N. ElJ-REGAL,* *National Institute of Oceanogr. & Fisheries, AL-Kanater AI-Khayria, Egypt. Key Words: Chemical, Mineralogical and Sediments. ABSTRACT Values of pH , salinity (as EC) calcium and magnesium ( Mg+ 2) were increased westwards in the bottom sediments ofthe investigated Lake […]
POPULATION DYNAMICS OF Tilapia zillii (Gerv.) IN LAKE QARUN, EGYPT
POPULATION DYNAMICS OF Tilapia zillii (Gerv.) IN LAKE QARUN, EGYPT By S. N. FALTAS* National Institute of Oceanography and Fisheries, Alexandria, Egypt. Key words: Tilapia zillii, Mortality, Yield per recruit. ABSTRACT Population dynamics of Tilapia zillii (Gerv.) in Lake Qarun was studied in the present work. Samples were taken from the trammel catch during !991 […]
PHASA FACTOR INFLUENCING MATURATION AND SPAWNING OF THE PRAWN PENAEUS JAPONICUS (Bate)
PHASA FACTOR INFLUENCING MATURATION AND SPAWNING OF THE PRAWN PENAEUS JAPONICUS (Bate) By N. F. ABD EI-HAMID* ·k National Institute of Oceanography and Fisheries, Alexandria – Egypt. Key words: Penaeus japonicus, eyestalk ablation, pH induced maturation. ABSTRACT Unilateral eyestalk extirpation in females of Penaeus japonicus (Bate) is sufficient to induce maturation and spawning in 3-5 […]
NUMERICAL AIVALYSIS OF CIIANGEI..~f11’1 1111: BIJ~4LVLJ) A-fOLLlJSC FAUNA ALONG THE SAUDI l1VTER11DALZtJIVE OF THE ARABIAN GULF’
NUMERICAL AIVALYSIS OF CIIANGEI..~f11’1 1111: BIJ~4LVLJ) A-fOLLlJSC FAUNA ALONG THE SAUDI l1VTER11DALZtJIVE OF THE ARABIAN GULF’ By A. K. HASSAN* *National Institute of Oceanography and Fisheries, Alexandria – Egypt. Key Words: Mollusca, Bivalvia, Arabian Gulf. . ABSTRACT The present study entails with the temporal and spatial changes in the bivalved mollusc populations ofthe intertidal zone […]
MASS PRODUCTION OF OREOCHROMIS FRY IN CONCRETE PONDS
MASS PRODUCTION OF OREOCHROMIS FRY IN CONCRETE PONDS BY ABO-ELWAFA M.A.*; EL-EBIARY E.H.; NOURA.M.; AND BADAWY A.M. * I\ational Institute of Oceanography and Fisheries, Alexandria. Ke:, Words: Aquaculture, Mass Culture, Tilapia. ABSTRACT Twenty four spawning concrete ponds (2 x 1 x 0.65) were used to study the effect oftwo protein levels 25, 35% and two […]
LIPID COMPOSITION OF COMMON BIVAlVE MOLLUSCAN SHELLFISH IN EGYPT.
LIPID COMPOSITION OF COMMON BIVAlVE MOLLUSCAN SHELLFISH IN EGYPT. By N.A. SABER* “‘National Institute of Oceanography & Fisheries, Anfoushy, Alexandria, Egypt. Key words: Lipid, Shellfish. ABSTRACT Little is known about the composition of jlesh lipids of bivalve molluscan shellfish Om-Elkholoul (Vedge shell, Donax trunculus) and Gandoujly (Butter fish, Tapes spp.) which brought from Edco Lake […]
