ACUTE AND CHRONIC TOXICITY OF SOME AROMATIC HYDROCARBONS ON TILAPIA ZILLII (GERv’)
ACUTE AND CHRONIC TOXICITY OF SOME AROMATIC HYDROCARBONS ON TILAPIA ZILLII (GERv’) By N. K. EL-SAYED*; S. A. SALEM; A. MOURSY AND B. M. IBRAHIM * Zoology Dept., Fac. of Science, Cairo University Key Words: Toxicity, Aromatic Hydrocarbons, Tilapia zUlii ABSTRACT The presence and concentrations of four soluble aromatic hydrocarbons from oil origin (toluene. O-xylene, […]
A STUDY ON THE TRASH FISH OBTAINED BY THE EGYPTIAN MEDITERRANEAN TRA WLERS.
A STUDY ON THE TRASH FISH OBTAINED BY THE EGYPTIAN MEDITERRANEAN TRA WLERS. By S. I. RIZKALLA* *National Institute of Oceanography and Fisheries, Alexandria, Egypt. Composition. ABSTRACT The analysis ofthe commercial catch ofthe Egyptian Mediterranean trcTwlers obtained by 132 trawling trips during the period from December 1993 to November 1994 showed that it was formed […]
ZOOPLANKTON OF LAKE BUROLLUS (EGYPT)
ZOOPLANKTON OF LAKE BUROLLUS (EGYPT) By s. M. ABOUL EZz* *National Institute of Oceanography and Fisheries, Alexandria (Egypt). Key words: Zooplankton, Diversity, Statistical Multispecies analysis ABSTRACT Annual average and seasonal variations of zooplankton stocks in Lake Burollus were estimated in the periodfrom April, 1987 to March, 1988 which was characterised by decreased influx of fresh […]
TRACE METALS CONCENTRATION OF AQUATIC MACROPHYTES IN LAKE MANZALAH, EGYPT.
TRACE METALS CONCENTRATION OF AQUATIC MACROPHYTES IN LAKE MANZALAH, EGYPT. BY W. M. EL-SARRAF* National Institute of Oceanography and Fisheries, Alexandria, Egypt. Key words: Limnology, Macrophytes, Trace metals. ABSTRACT Lead, cadmium, zinc, manganese, iron and copper concentrations in five macrophytes were measured during the periodfrom 1990 to 1992 in Lake Manzalah. The study revealed that […]
THE INFLUENCE OF THE LAST WIDENING AND DEEPENING OF THE SUEZ CANAL ON ITS TiDAL MOTION
THE INFLUENCE OF THE LAST WIDENING AND DEEPENING OF THE SUEZ CANAL ON ITS TiDAL MOTION By G.F. SOLIMAN* *National Institute of Oceanography and Fisheries, Alexandria, Egypt. Key words: Suez Canal, tidal motion. ABSTRACT The tidal motions in the Suez Canal and its lakes have been numerically investigated using the depths distribution as processedfrom the […]
SPATIAL DISTRIBUTIONAND SEASONAL VARIATION OF THE GASTROPOD MOLLUSC SPECIES ALONG THE SAUDI INTERTIDAL ZONE OF THE ARABIAN GULF
SPATIAL DISTRIBUTIONAND SEASONAL VARIATION OF THE GASTROPOD MOLLUSC SPECIES ALONG THE SAUDI INTERTIDAL ZONE OF THE ARABIAN GULF By A. K. HASSAN Department of Aquatic Resource Development, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 1872, Hofuf, AI-Hassa 1982, Saudi Arabia. ABSTRACT The present investigation entails with the spatial distribution and seasonal […]
SOME WATER QUALITY CHARACTERISTICS OF EL-DEKHAILA HARBOUR, ALEXANDRIA, EGYPT.
SOME WATER QUALITY CHARACTERISTICS OF EL-DEKHAILA HARBOUR, ALEXANDRIA, EGYPT. BY R.R.. ABDALLA*; F.A. ZAGHLOUL; Y.A. HASSAN AND H.M. MOUSTAFA *National Institute of Oceanography and Fisheries, Alexandria, Egypt. Key words: Eutrophication, Nutrients. ABSTRACT Dekhaila Bimonthly Harbour collections at nine of selected water samples hydrographic were carried stations out during in EIthe periodfrom October 1990 to October […]
SOME THECATE HYDROIDS ASSOCIATED WITH POSIDONIA OCEANICA (L.) DELILE MEADOWS IN THE EGYPTIAN MEDITERRANEAN WATERS
SOME THECATE HYDROIDS ASSOCIATED WITH POSIDONIA OCEANICA (L.) DELILE MEADOWS IN THE EGYPTIAN MEDITERRANEAN WATERS BY M. EL BESHBEESHY* *National Institute of Oceanography and Fisheries, Alexandria-Egypt. Key Words: Coelenterates, Hydroids, Mediterranean. ABSTRACT Seven thecate hydroids were registered as epiphytes on Posidonia leaves in the Egyptian Mediterranean waters. These comprise: Clytia hemisphaerica (Linnaeus), Obelia geniculata (Linnaeus), […]
