2024-03-29T11:40:15Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=459
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Effect of some rearing systems on growth and development of the Egyptian sole (Solea aegyptiaca Chabanaud, 1927) larvae.
Safaa
Aljilany
Ragab
Mohammed
Hamed
Saleh
Ramadan
Abou-Zied
Sobhy
Allam
This study was conducted to evaluate the optimum salinity and temperature on growth and development of Solea aegyptiaca larvae and weaning feed type on growth of Solea aegyptiaca post-larvae. The first experiment was tested five different salinities (10, 15, 20, 25 and 30‰). The results found that, no significant difference in growth rate, but the best performance and survival rate of larvae was at salinity 20‰. The second experiment was tested eight different water temperature (16, 17, 18, 19, 20, 21, 22 and 23°C). The results showed that, the larvae under temperature 20 °Cshowed the highest growth rate, while the best survival rate was recorded at temperature 16 °C under experimental conditions. The growth rate for larvae has been increased gradually with increasing temperature until 20 °C then decreased, while survival rate was decreased gradually with increasing temperature. The third experiment was tested three different feed (Artemia (T1), Artemia + artificial feed (T2) and artificial feed (T3)) of Solea aegyptiaca post-larvae weaning. Results of growth performance parameters were highest with post-larvae fed on (T1) comparedto the other feeds (T2 and T3). Larvae fed on (T1 and T2) led to higher survival rate compared to fed on (T3).
Growth performance
Development
survival rate
salinity
Temperature
Solea aegyptiaca
2016
04
01
1
21
https://ejabf.journals.ekb.eg/article_2290_a0fbe2c3be227bee82c534e2fbf97164.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Eco-friendly cultivation of Keeled mullet (Liza carinata) in biofloc system
Magdy
Khalil
Ragaa
Ragaa
Ragab
Mohamed2
Basem
Abd-alatty
Ashraf
Suloma
Shimaa
henish2
A detailed study was carried out to evaluate the suitability of biofloc system condition for cultivation of Keeled mullet (Liza carinata) fish. The experimental design consisted of 2x2 factors experimental arrangement of two levels of crudeprotein (23 and 28% CP) and two culture systems (clear water system (CWS) change and biofloc treatment (BFT) with zero water exchange): (CWS23%, CWS28%, BFT23% and BFT28%), where the superscripts refer to the levels of crude protein. Each treatment included three glass aquaria (80 X 45 X 30 cm) and stocked by 15 fry peraquarium with an average initial body weight of 0.26±0.003g. Total weight gain (TWG), average daily gain (ADG), and specific growth rate (SGR) were determined. Fish fed on 28% CP had significantly higher values of FBW, FI, FCR, EG and ER (24.41, 25.81, 1.06, 34.20 and 20.68, respectively) compared with values for fish fed on23% CP (17.91, 1.19, 27.38 and 17.86, respectively). Fish fed on 23% CP had significantly higher PER and PPV values (3.83 and 72.91, respectively). Fish reared under CWS had significantly higher FI, FCR and ER (28.36, 1.38 and 20.22, respectively), while fish reared under BFT had significantly higher PER, EG and PPV values (4.57, 31.62 and 87.40, respectively). The highest amount of feed intake was recorded by CWS28% (33.94). CWS 28%treatment had significantly highest FBW(25.45) value, while CWS 23% treatment had the lowest FBW (16.40). Fish reared under biofloc treatment recorded the highestΣω3 levels in their whole bodies compared to that reared under (CWS) clear water system. It could be concluded that biofloc technology is a suitable system for Liza carinata cultivation economically and environmentally.
Liza carinata
Biofloc
Cultivation
water quality
Growth performance
2016
04
01
23
35
https://ejabf.journals.ekb.eg/article_2291_6673f0db5a375e008642818276d1016a.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Multiple biomarkers response in Nile tilapia, Oreochromis niloticus (L.) exposed to sublethal concentrations of hexavalent chromium
Iman
Elsaeidy1
Hanaa
Assem
Gamal
Edrees
Azza
Khalifa
The effect of two sublethal concentrations (15, 30 mg/l) of Cr6+ on Nile tilapia, Oreochromis niloticus has been studied using some hematological and biochemical parameters aiming to evaluate their possible potential use as biomarkers of stress and/or defense. Hemoglobin content decreased throughout the experiment period, compared to the control. Moreover, the plasma glucose content and uric acid increased in both Cr6+ concentrations. Plasma urea decreased during the first 24 hr of exposure, then it increased, thereafter decreased and finally fish recovered. Also, the brain AChE of the lower concentration showed significant fluctuations starting with inhibition of the enzyme then activation and final tendency to recover, while the higher concentration showed a significant increase throughout the whole experimentalperiod with no sign of recovery. Plasma AChE has been inhibited and no sign of recovery was detected. Gill Na+-K+-ATPase specific activity remained unchanged in fish exposed to both Cr6+ concentrations during the whole experimental time. Liver metallothionein (MT) content increased in both fish treated with Cr6+ concentrations.The present results indicated that blood Hb, plasma glucose followed by brain AChE are more sensitive indicators of general stress. However, MT, to a lesser extent, may be considered a valuable biomarker of defense. Finally, plasma AChE may also be considered as a biomarker of defense.
missed
2016
04
01
37
49
https://ejabf.journals.ekb.eg/article_2292_6124110bf645679486a68f0b78cf7497.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Some ecological studies on the impact of magnetic field on the tap water
Zeinab
Khater
Mona
Ibraheim
The aim of the present study is to know the effects of the magnetic field on water purification. Samples were collected from tap water of Faculty of Science, Zagazig University, Zagazig, Egypt, and then treated using the magnetic field. Water was exposed to a weak static magnetic field (MF) generated from a stack of magnets (B = 18 G). After this treatment, the physico-chemical parameters of water were measured, as well as the heavy metal concentrations. The results showed that the magnetic field has a very great effect on physico-chemical parameters of the water , asit decreases its concentrations in water samples. The magnetic field with an intensity of 18 G has a very great effect on water purification, but it is not recommended to use it in treating water pollution without sufficient studies on its safety on the living organisms live in and drinking it.
Water pollution treatment
magnetic field
magnetized water
Heavy metals
Tap water
2016
04
01
51
60
https://ejabf.journals.ekb.eg/article_2293_4f16436bdf63fe5a089acafa73b8fcc3.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Fishery status of Carangoides bajad and Caranx melampygus (Family Carangidae) from Shalateen Fishing Area, Red Sea, Egypt, based on yield per recruit (Y/R) analysis
Sahar
Mehanna
Ashraf
Mohammad
Usama
Mahmoud
The fishery status of two carangid species; Carangoides bajad and Caranx melampygus from Shalateen fishing area, Red Sea, Egypt has been evaluated. Yield per recruit of the two species as a function of different values of fishing mortalitycoefficient, age at first capture and natural mortality coefficient was estimated. For C. bajad it is found that, the current fishing mortality coefficient (1.34 / y), age at first capture (0.35 y) and natural mortality coefficient (0.34 / y) give a yield of (304.8 g) per recruit. While for C. melampygus, the current fishing mortality coefficient (1.75 / y),age at first capture (0.35 y) and natural mortality coefficient (0.25 / y) give a yield of (675.63 g) per recruit. Yield per recruit for C. bajad and C. melampygus showed that, the maximum (Y/R) was obtained at Fmax = 0.5 and 0.8 for C. bajad and C. melampygus respectively. For management purposes, the fishing mortality which is related to the fishing effort of C. bajad and C. melampygus should be reduced by at least 50% as well as the length at first capture which is related to the mesh size should be raised to the length at first maturity to maintain this valuable fishery.
Red Sea
Shalateen
Yield per recruit (Y/R)
Carangoides bajad
Caranx melampygus
Management
2016
04
01
21
68
https://ejabf.journals.ekb.eg/article_2294_9d6aacc8ac84b99938d346b03e9a3b12.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Toxicological evaluation of plant crude extracts on helminth parasites of Clarias gariepinus using host low observed effect concentration (LOEC)
Akinsanya
B
Ade
Ademilua
The potency of seven medicinal plant crude extracts against helminth parasites of Clarias gariepinus; Wenyonia sp. and Procamallanus sp. with less toxicological effect on host fingerlings were investigated. The activities of crude extracts of Allium sativum, Cymbopogon citrates, Ocimum sanctum, Thymus vulgaris, Vernomia amygdalina, Zingiber officinale, and Zanthoxylum zanthoxylones were investigated at 96 hours exposure. Relative Toxicity Factors (RTFs) of the extracts increase at host fingerlings’ Low Observed Effect Concentration (LOEC) - 0.1 LC50 g/L in the trend; A. sativum (RTF, 1.0) < C. citrates (RTF, 2.0) < O. sanctum (RTF, 2.0) < T. vulgaris (RTF, 3.0) < V. amygdalina (RTF, 4.0) < Z. officinale (RTF, 5.0) < Z. zanthoxylones (RTF, 10.0). As the concentration/response increases in the intervals; 1.0 LC50 g/L and (1.5) LC50 g/L, there were no change in relative toxicities except for Z. officinale, that showed decreased RTFs, while Z. zanthoxylones showed tremendous increase in RTFs (RTFs, 10.0, 16.0 and 27.0). Average Survival Time (AST) and Percentage Reduction in Survival Time (%RST) relative to saline solution for the intestinal parasites exposed to the extracts at the least interval; 0.1 LC50 g/L host fingerling, showed the similliar trend in susceptibility. Z. zanthoxylones had shown the highest potency against helminth parasites compared to the other extracts. The effects of plantextracts on parasites and the sensitive lifestage of their fish host is dose-dependent and to avoid overdosage, the need for determination of suitable concentration is of great importance.
Plant crude extracts
Reduction in Survival Time
Intestinal parasites
Relative Toxicity
factors
fingerlings
2016
04
01
69
77
https://ejabf.journals.ekb.eg/article_2295_13b1610d55687b8084363f5e6338e26f.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Studies on Cucullanus sp. (Nematoda: Cucullanidae) parasitic in Tilapia zillii,(Gervais, 1848) from Lekki Lagoon, Lagos, Nigeria.
Akinsanya
Bamidele
Based on the parasitological examination of three hundred and twenty one specimens of Tilapia zillii (n=321), thirty three nematode species of the genus Cucullanus Muller 1777 were recorded. The fish species had overall prevalence of9.6%. The female specimens had a prevalence of 11.8% (n=110 (18) 11.8%), while the male specimens had a slightly lower prevalence of 8.5% (n=211 (18) 8.5%). The nematode Cucullanus sp. was collected from the intestine of the fish host. SEM description of the recovered Cucullanus sp. shows some distinguishing features which place it apart from most of its congeners. The submedian papillae were located on the cuticle, single amphid in between the two upper submedian papillae, short spicule and 23 upper teeth and 34 lower teeth on the dorsoventrally elongate mouth.The thistological sections of the parasitized host revealed marked sloughing of cells into the lumen and intraluminal adult nematode mixed with necrotic debris.
Cucullanus sp
Tilapia zillii
Lekki Lagoon
Nigeria
2016
04
01
79
87
https://ejabf.journals.ekb.eg/article_2296_e1b3585472e4c28e1651c585956429a8.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Influences of some pollutants on water quality of El-Bagouria Canal at Kafr El-Zayat Region, El-Gharbia Governorate, Egypt
Mohamed
Ghanem
Sabry
Shehata
Emad
Ghanem
The present study aims to describe the effect of heavy metals: copper,manganese, iron and zinc on the water quality of El-Bagouria Canal at Kafr El-Zayat region, El-Gharbiah Governorate. Seasonal variations of physico-chemical parameterswere studied during the period from summer, 2013 to spring, 2014. Also, to study their effects on the different organs of the commercial fish species; Nile tilapia, Oreochromis niloticus by studying some of biochemical parameters of this fishspecies (total protein, total lipids, total carbohydrates, ASAT and ALAT) during the study period.Results revealed that, heavy metals in the water showed seasonal variations. Also, data exhibited the highest values of heavy metals in the different organs of O. niloticus were recorded during winter in the liver and kidney and the lowest were observed in the muscles. Biochemical analysis indicated devastating effects,especially enzymes activities, in the metabolic organs. Statistical analysis using analysis of variance (ANOVA, at p<0.05) based on data represent the measured values of heavy metals in the different organs of O. niloticus during the different seasons. Oneway analysis proved that, there were highly significant differences between the metals and between the different seasons also between different organs. On the other hand, two ways of ANOVA provided highly significant differences between organs and metals at the same seasons. While, non-significant differences were detected at the interactionsbetween seasons and organs at the same metals and between seasons and metals at the same organs. One way analysis for biochemical parameters in the different organs of O. niloticus during the different seasons proved that, there were highly significant differences between the parameters. Meanwhile, there were significant differencesbetween the different seasons and between target organs. Moreover, two ways of ANOVA provided highly significant differences between organs and parameters at the same seasons. While, non-significant differences were found at the interactions between seasons and organs at the same parameters and between seasons and parameters at thesame organs.
water quality
biochemical parameters
Oreochromis niloticus
El-Bagouria Canal
pollutant
2016
04
01
89
111
https://ejabf.journals.ekb.eg/article_2297_f941a3c17e548e338f57fedafe6ac095.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Effect of sorghum replacement and probiotic on growth performance and feed utilization of the Nile Tilapia (Oreochromis niloticus)
Mohsen
Hussein
Abd El-monaam
younes
Mohamed
Ali
Abd El-Azem
Abd El-azim
This study was conducted to evaluate the effect of replacing yellow corn (Zea maize) with sorghum (sorghum bicolor) on the growth performance and body composition of the Nile Tilapia. Sorghum was included into diets at four levels (25%,50%, 75% and 100%). The diets with zero sorghum level act as a control and response of fish fed on diets containing sorghum and additive Lacto cel-con supplementation (as probiotic) at a rate of (0.3g/kg diet). All the diets were isonitrogenous and isoenergetic. The results after 16 week experimental period indicated that fish fed onthe diets containing 75% sorghum + probiotic (T3) showed significantly better growth performance and feed utilization in terms final body weight, weight gain, mean daily gain, specific growth rate, feed conversion ratio, feed intake, protein efficiency ratio and net protein utilization than those fed on the control diet. The present study indicated that, the adverse effect of replacing yellow corn (Zea maize) with sorghum (sorghum bicolor) at 75% + probiotic is the best ratio on the growth performance and feed utilization as a fish meal in Tilapia diets.
replacement
Growth performance
feed utilization
Nile tilapia
probiotic
2016
04
01
113
121
https://ejabf.journals.ekb.eg/article_2298_3eb9badf3d55cdb7edd9f7a3b5740215.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
2
Geomorphologic and hydrogeologic studies for some basins in the area between Abu Ghusun and Bernice, South Eastern Desert, Egypt"
Hassan
Thabet
Mohamed
khaled
Hassan
Hassan
Geomorphological and hydrogeological investigations were carried out in 7 selected basins in the area between Abu Ghusun and Bernice (Eastern Desert), to evaluate their groundwater potentialities. Seven hydrogeological basins wereextensively studied through morphometric analyses. These basins from north to south are Um Al Abas, Abu Ghusun, Ranga, El Reidi, Khashir, Lahami and Mukhit. These basins of second order discharge towards the coastal plain of the Red Sea at the east. The groundwater stored in the lower parts of the wadi filling and the upper fractured bedrock of the wadi (fractured basement rocks). On the other hand, the sedimentary rocks of the down stream parts of the wadis and morpho-tectonic plains contain the Miocene sandstone water bearing formations. Generally, the water bearing formationin the upstream portions of these wadis of limited groundwater potentiality. The thickness as well as the structural elements which affect water percolation and accumulation was defined. Promising location for digging new groundwater well was recommended in these basins and the results confirmed those obtained from the geoelectric survey inthese basins.
Eastern Desert
Geomorphology
hydrogeology
Abu Ghusun
Hamata
Bernice
Ranga
El Reidi
Khashir
Lahami and Mukhit
2016
04
01
123
144
https://ejabf.journals.ekb.eg/article_2299_e3dbbcd67079ff666734582f8bc23fea.pdf