Nassr-Allah H Abdel-Hameid

• Professor at Benha University

The present study investigates the effect of different dietary protein levels suboptimum level (25%) and optimum level (35%), different Zn forms bulk zinc oxide (BZnO) or nanoparticles zinc oxide (NZnO), and their interaction on performance, intestinal topography, hematology, serum biochemical, antioxidant-immune responses, and related gene express...

A 12-week feeding trial was conducted to estimate the dietary copper requirement of fingerling Channa punctatus. Six casein-gelatin-based test diets (450 g kg⁻¹ crude protein; 18.81 kJ g⁻¹ gross energy) with graded levels of copper as copper sulphate (3.7, 4.7, 5.7, 6.7, 7.7 and 8.7 mg copper equivalent kg⁻¹ diet) were formulated and fed to triplic...

The biology of the tub gurnard, Chelidonichthys lucerna (Linnaeus, 1758), has been studied based on data collected between August (2009) and July (2010) from the Egyptian Mediterranean water in front of Alexandria. A total of 873 specimens ranged between 10.6 and 28.2 cm TL and from 10.2 to 232.5 g total weight, were sampled. The age, growth, lengt...

In this study, the effects of fish diet contaminated with Cu, Cd and Cu+Cd on Nile tilapia, was demonstrated by evaluating its bioaccumulation in the muscle and by testing the cytogenetic profile. Fish exposed to diet contaminated with Cu, Cd or their mixture had a significant increase in the number of chromosomal abnormalities and an inhibition of...

Age, growth and mortality of Streaked Gurnard Trigloporus lastoviza from the Egyptian Mediterranean waters off Alexandria were investigated between the period from July 2009 and August 2010. The observed maximum age was 4 years for both sexes based on otolith readings. The length-weight relationship was estimated as W=0.0088L3.0694 (r=0.9854); W=0....

The filtration rate of zebra mussels (Dreissena polymorpha), as a sensitive biological end point, was used to evaluate the toxicity of lead and iron. Zebra mussels were exposed individually to serial levels of lead and iron (800, 1000, 1200, 1400, 1800 μg L-1). The inhibition of filtration rate was determined after 24 h. The bioassay revealed that...

In this study, sensitivity of a novel acute bioassay based on the feeding activity of Daphnia magna was assessed, using 2 and 4 h of exposure. For calibration purposes, results were compared with those of the standard immobility test as described by the ISO 6341:1996 standard. Using potassium dichromate as the reference chemical, after 4 h of expos...

The lethal concentration for 50% of fish for 96h (96h LC(50)) of copper (Cu(2+)) was estimated for the Nile catfish (Clarias gariepinus) in extreme seasons, winter and summer, 4.31 and 4.79 mg/l, respectively. The Nile catfish was exposed to 96h LC(50) of copper for 7 days in extreme winter and summer. The body indices, haematological parameters as...

The effect of feeding graded levels of vitamin E (E0, E20, E40, E60, E100, E140, E180, E220, E260) in nine casein–gelatin-based isonitrogenous (450 g kg−1 crude protein) and isoenergetic (17.97 kJ g−1 gross energy) experimental diets was evaluated in fingerling Channa punctatus for 12 weeks. Growth, nutritional and haematological parameters were st...

The aim of this study was to examine the differences between natural and morphologically modified stream bed sections in Hungarian midland streams by means of macroinvertebrate shredder abundance and leaf litter decomposition, and identify the key drivers of poor shredder fauna in modified water bodies. Eight sampling sites on three low order Hunga...

In this study glochidia as most sensitive life-stage of bivalves were used to evaluate the toxicity of copper, zinc and lead. Sensitivity of three species, Anodonta anatina, Pseudanodonta complanata and Unio tumiduswere compared to copper and zinc, based on 24 and 48 h LC50s. The copper 24 h LC50 showed the lowest value (26.8 μg·L-1) for Unio tumid...

The present study was intended to test the protective upshot of calcium carbonate against the gifted toxicity of arsenic to the Nile cat-fish (Clarias gariepinus). Enhanced hepatosomatic index (HSI) and reduced gonadosomatic index (GSI) and intestinal index (ISI) as well as some of the tested blood parameters were recorded for fishes down to arseni...

In this study, dimethyl-4,4'-dimethoxy-5,6,5',6'-dimethylene dioxybiphenyl-2,2'-dicarboxylate (DDB) was examined to justify its role in the hepatoprotection against erythromycin toxicity in male rats. Oral daily administration of toxic dose of erythromycin stearate (EE, 100 mg/kg body weight) was given to male rats for fourteen days to induce hepat...

Morphometric, meristic and DNA riboprinting analyses of Tilapia species and their hybrids inhabiting the River Nile were examined. Morphometric data showed striking similarities and overlapping among Tilapia species, making it impossible to differentiate these species. Meristic characteristics revealed that Tilapia species could be identified into...

T he present study deals with the effect of some water pollutants; copper sulfare as a fungicide, malathion as an insecticide and paraquat as a herbicide, on serum total protein serum albumin and globulin. Furthermore, proteinogram of blood serum in Oreochromis niloticus was done using electrophoresis. It was found that the control fish have nine s...