2024-03-29T15:18:19Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=1696
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Reproductive biology of the small-scaled terapon, Terapon puta (Cuvier, 1829), from Lake Timsah, Egypt
William
Rizkalla
Hamza A.
El-Shabaka
Azza A.
El-Ganiany
Fawzia
Abd El-Rahman
Marwa M.
El-Naggar
The reproductive biology of the small-scaled terapon, Terapon puta (Cuvier, 1829), from Lake Timsah, Ismailia Governorate, Egypt, has been studied during the period from June 2011 to May 2014. The results revealed that the growth of the total body weight relative to the total body length is negative allometric (b = 2.4954). Moreover, the collected fishes were divided into three age groups from one to three years. The age composition of T. puta catch indicated that individuals belonging to age group two have predominated the fish population (90.53% of the total collected individuals). The overall sex ratio indicated that the females T. puta were dominant throughout all the seasons of the year. The average values of the gonadosomatic index of T. puta were small in winter (the pre-spawning season) for both sexes, while they gradually increased in spring and summer to reach highest values in summer. The values of GSI then decreased gradually to reach minimal values in autumn (the post-spawning season) for both sexes. The aforementioned data indicates that T. puta has a long spawning season that starts in early spring and ends in late summer. Moreover, the study of the fecundity of T. puta revealed that the highest significant relationship was found between the logarithmic values of both mean total body weight, and mean observed absolute fecundity, with highest correlation coefficient (r2=0.999), consequently, the total body weight was the best indicator of the fecundity of T. puta. The recommendation of the present study is to prevent fishing of T. puta in Lake Timsah during the spawning season, which extends from April to August, or use nets with wider meshes in order to protect the spawning biomass of T. puta resources.
Terapon puta
fecundity
gonadosomatic index
allometric growth
otolith
sex ratio
2016
07
01
1
14
https://ejabf.journals.ekb.eg/article_10587_58f4bd9e574a9551df2fa65dc093450f.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Effect of stocking density and water exchange period on growth performance, feed utilization and body chemical composition on Rabbitfish Siganus rivulatus juvenile under laboratory condition
Mohamed F. A.
Abdel-Aziz
Ramadan M.
Abou-Zied
Sobhy M.
Allam
Ragab A.
Mohammed
Two trials were conducted to determine the best stocking density and the optimum of water change period on growth performance and feed utilization of rabbitfish juvenile (Initial body weight 0.948 g ± 0.124). Stocking density was tested in the first trial, which consisted of four treatments. The fish were stocked at 10 fish/m3 and 20, 30 and 40fish/ m3 in four treatments respectively. The results showed significant differences between the treatments and cleared that, stocking density 10 and 20 fish / m3 were the better than 30 and 40 fish / m3 in growth and feed utilization parameters. The results affirmed that, an increase of fish number over 20 fish/ m3 lead to a decrease of growth and feed utilization parameters. The second trial designed to evaluate different four periods of the water exchange at rate 50 % of the water volume.
The water was exchanged every day, every two days, every three days and every four days in the first, second, third and fourth treatments respectively. The results revealed significant differences between the treatments and cleared that, the best total weight gain and feed conversion ratio were achieved with the third treatment (water exchanged every three days) and the water quality was within the acceptable limits for fish growth in all treatments.
rabbitfish
stocking density
water exchange
water quality
Growth performance
feed utilization
2016
07
01
15
33
https://ejabf.journals.ekb.eg/article_10588_8b1dfeadc655c6d3a4ece5be71ad86a0.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Effect of feeding frequency and feeding time on growth performance, feed utilization efficiency and body chemical composition on Rabbitfish Siganus rivulatus fry and juvenile under laboratory condition
Mohamed F. A.
Abdel-Aziz
Ragab A.
Mohammed
Ramadan M.
Abou-Zied
Sobhy M.
Allam
The present study consisted of two trials that conducted to evaluate the feeding frequency and the feeding time on growth performance, feed efficiency and body composition of rabbitfish Siganus rivulatus, the fish fed on one diet (35% crude protein). The first trial was conducted on rabbitfish fry (initial weight 0.18 g ± 0.012) and consisted of different three treatments of feeding frequency, the first treatment the daily meal divided into two times, the second treatment the daily meal divided into three times and the third treatment, the meal was divided into four times. The second trial was conducted on rabbitfish juvenile (initial weight 0.948 g ± 0.124) and consisted of different four treatments of feeding time. fish fed in two times the first treatment fed at 9am and 11am, the second treatment fish fed at 11am and 1pm, the third treatment fish fed 1pm and 4pm and the fourth treatment fish fed at 9am and 4pm. The statistical analysis of results indicated that, feeding frequency feeding time appeared significantly differences between the treatments in growth performance and feed utilization parameters. The total gain in weight and feed conversion ratio were affected by feeding frequency and feeding time. The results affirmed that, the third treatment (four time feeding /day) in the first trial and both the first and second treatments in the second trial were the best of the growth performance and feed utilization parameters.
rabbitfish
feeding frequency
Feeding time
growth performance and feed utilization
2016
07
01
35
52
https://ejabf.journals.ekb.eg/article_10589_deb5e9b54450f9b1c18bc4fa3acaff40.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Application of a newly developed super paramagnetic magnetite Fe3O4 nanowafers nanoparticle in the removal of heavy metals from industrial wastewater submerging in the River Nile
Mostafa M.
Emara
Mohamed E.
Goher
Mohamed H.
Abdo
Nesrine M.
Mahmod
Amr S.
El-Shamy
This study describes a super paramagnetic magnetite Fe3O4 nanowafers adsorbent, using for the completely removal of some heavy metals (Fe+2, Mn+2, Cu+2, Zn+2, Ni+2, Pb+2, and Cd+2) from three discharge industrial wastewater samples which consider some pollution sources that submerging in the River Nile. For adsorbent the effect of various parameters such as the initial concentration (100 – 300 ppm), the mass of adsorbent (0.5 – 3 gm), the contact time (1-3 ml/min) and the solution pH (2-10) were determined of Cd metal ions by breakthrough determination. The maximum removal efficiency was found to be 100% in 1gm of SPMMFe3O4 NWNPs per 4572 ml at 25 mg/l (10 mg/l Fe+2, 4 mg/l Mn+2, 3 mg/l Ni+2, 2 mg/l Cu+2, 2 mg/l Zn+2, 2 mg/l Pb+2, and 2 mg/l Cd+2 ) of industrial discharge wastewaters were collected from the El-Nasr Company for Coks, Chemicals, Egyptian Iron and Steel factory and Egyptian Sugar & Integrated Industries Company at pH= 7.However, the AMBERLITE IR 120 H resin obtains result 2914.65 ml at the same conditions, this means that the efficiency of super paramagnetic magnetite Fe3O4 nanoparticles on a resin (AMBERLITE IR 120 H) supportis greater with 36.25 %. The next step in this work will consist of testing this non-conventional adsorbent on a pilot industrial scale.
Nanowafers
Magnetite
Heavy metals
Wastewater
River Nile
2016
07
01
53
66
https://ejabf.journals.ekb.eg/article_10607_c2f15e3393366bd0b5c1e57980300273.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Effect of feed supplementation with L-carnitine on growth and cold tolerance of the Nile tilapia, Oreochromis niloticus
Hosam, M.
Agouz
Magdy, A.
Soltan
Abd-Elkarem, E.
Esaid
Abd-Elbary, A.
El-Qabatti
The effect of dietary L-carnitine and lipid on growth performance, feed utilization and body composition of Nile tilapia, Oreochromis niloticus were evaluated in two separate 2×5 factorial experiments as well as the effect of dietary L-carnitine on cold tolerance of Nile tilapia was evaluated in another experiment of the present study. The effect of L-carnitine was evaluated in five levels, 0, 300, 600, 900 and 1200 mg/kg diet at each of two lipid levels (5 and 10%), therefore ten isonitrogenous (30% CP) and isocaloric (3000 kcal ME/kg) diets were formulated and tested in three replicates with Nile tilapia (First experiment). Another experiment was applied by using the same previous diets (30% CP, 5% fat, 3000 kcal ME/kg diet) which formulated to contain increasing levels of L-carnitine, 0, 300, 600, 900 and 1200 mg/kg diet to study the effect of L-carnitine on cold tolerance of Nile tilapia (second experiment).
In the present study, dietary L-carnitine at any level significantly increased all growth parameters (body weight, body length, weight gain, specific growth rate) and improved feed conversion and protein efficiency ratio of Nile tilapia. Compared to control group dietary L-carnitine supplementation significantly (P<0.05) increased the percentage of dress-out and flesh and decreased the percentage of by-products of Nile tilapia Also, increased dietary L-carnitine level decreased (P<0.05) fat content and increased (P<0.05) protein content of Nile tilapia.
Results of the second experiment of the present study clearly showed that, the addition of L-carnitine to the diet of tilapia fish can substantially reduce their mortality during winter season. Fish fed the diet supplemented with 900 or 1200 mg/kg exhibited the best tolerance to cold water.
In conclusion, dietary L-carnitine supplementation at all studied levels (300 to 1200 mg/kg diet) improved growth and feed utilization, decrease tissue fat and increased tissue protein and also increased survival rate of tilapia fry reared during cold season.
L-carnitine
lipids
Growth performance
feed utilization Nile tilapia
2016
07
01
67
75
https://ejabf.journals.ekb.eg/article_10608_f31d1c18c1cca31d0033920d2368db2f.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Growth and feed utilization of the Nile tilapia fry pre-exposured to different water temperatures and hormone 17α methyltestosterone
Hosam M.
Agouz
The effect of water temperatures in combination with or without hormone 17α methyltestosterone application for different periods (1, 2, 3 and 4 weeks) on sex ratio and survival rate of O. niloticus fry were investigated. Three rearing temperatures (25, 30 or 30°C) were tested; within each rearing treatment two levels of 17α methyltestosterone (0 or 60 mg/kg basal diet) were used. Sex ratio and survival rate of O. niloticus fry were determined after 1, 2, 3 and 4 weeks. Therefore, 24 groups (3 × 2 × 4) were tested. At the end of this experiment, sex reversed fry were chosen at random from each group and stocked in 72 L aquaria (3 replicates for each group, 3×24) and used to investigate the effect of rearing water temperature in combination with or without hormone application for different periods (1, 2, 3 and 4 weeks) on growth performance and feed utilization of O. niloticus fry during one month after treatment period.
The highest final body weight (BW), body length (BL), weight gain (WG), specific growth rate (SGR) and the worst feed conversion ratio (FCR) were obtained for fry reared (pre-exposured) at 35°C and fed on the diet supplemented by 60 mg 17α-MT for one week and the lowest final BW, BL, WG, SGR and the best FCR were recorded for the control fry group (reared at 25°C and fed on the diet free from 17α-MT for two weeks) and the same trend was also observed for tilapia fry pre-exposured to each of water temperature and 17α-MT for three or four weeks. For the control, fry group rearing periods (1, 2, 3 or 4 weeks) did not affect the final BW, BL, WG, SGR or FCR of growing the Nile tilapia fry while, increasing the rearing period for C35H1 gradually increased these parameters.
pre-exposured
Water Temperature
hormone (17α methyltestosterone) Nile tilapia
Growth performance
feed utilization
2016
07
01
77
87
https://ejabf.journals.ekb.eg/article_10609_238e38d093e17672e9fdcb9e9b64d4cb.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Impact of some physico-chemical factors of water on the diversity and distribution of Mollusca in Lake Nasser (Egypt)
Soad Saad
Abdel-Gawad
The present study aimed to assess the diversity and distribution of Mollusca under the impact of some physico-chemical variables in Lake Nasser, Egypt. Bottom fauna was sampled for 4 seasons in 2013 and 2 seasons (winter & summer) in 2015 from the main channel of Lake Nasser and two main of its khurs (Dahmit Khur and Tushka West Khur).The study revealed the predominance of gastropods over bivalves. A total of 10 taxa of freshwater molluscs were recorded, 7 species from Gastropoda and 3species of Bivalvia representing 95 % and 5% of the total population density of molluscs respectively. Numerically, Valvata nilotica was the most abundant taxa followed by Gyraulus ehrenbergi. Melanoides tuberculata and Bulinus truncatus. Spharium simile and Pisidium pirothi showed less frequent appearance, whereas Cleopatra bulimoides and Corbicula fluminalis were recorded as rare taxa. Relationship between the total number of individuals of molluscs and environmental parameters were determined by Canonical Correspondence Analysis (CCA). The results of analysis revealed a significant correlation between the total number of Mollusca and some environmental parameters, such as dissolved oxygen, pH, depth, transparency. Additionally, Ferrissiasp. was firstly recorded from Lake Nasser.
Mollusca community
Lake Nasser
diversity
physico-chemical parameters
CCA
2016
07
01
89
101
https://ejabf.journals.ekb.eg/article_10610_26ca602b1b5b50cc8a1ec424fd88dc8b.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Comparison of heavy metals levels in muscles, liver and gills of three fish species collected from agricultural drainage water AT El- Abbassa fish farm, Sharkia, Egypt.
Mohamed Y. M.
Aly
The concentration of heavy metals; iron, zinc, copper, lead and cadmium (Fe, zn, cu, Pb, and Cd) were determined in water and Nile tilapia, common carp and catfish caught from agricultural drainage water at El- Abbassa fish farm in the period from February to April 2016. Metals concentrations in the water were ranked in the following order Fe>Zn > Cu>Pb> Cd. the concentrations of Cu, Zn and cd in water were below the permissible levels according to the Egyptian Standards. Fe and Pb in the water samples exceeded the permissible limits. The fish muscles, gills and liver were carefully dissected out for digestion and determination of heavy metals. The concentration of heavy metals was analysed in tissues of muscles, gills and liver. The results revealed that Fe and Zn concentrations were the highest in all tissues analyzed, followed by Cu, Pb, and cd in almost all three fish species. The highest concentration of Iron (463.8±3. μg /g dry. wt) was detected in the gills of catfish. Whereas the lowest (255.1±7.3 μg /g dry. wt) in the muscles of common carp. The highest concentration of zn (203.0±1. μg /g dry. wt) was found in the gills of cat fish. While, the lowest (133.8±5.0 μg /g dry. wt) was recorded in the muscles of common carp. The highest concentration of copper (39.2±3.8 μg /g dry. wt) was detected in the liver of the catfish. While the lowest value (24.5±1.2 μg /g dry. wt) in the muscles of the Nile tilapia. For lead and cadmium the highest were found in the liver of catfish (3.7± 0.4and 2.4±0.19 μg /g dry. wt), while, the lowest in the muscles of common carp (1.6±.6and1.1±0.12 μg /g dry. wt). The results of the present study revealed that the abundance of heavy metals in fish organs followed the order: fe>Zn> Cu >Pb and cd. The concentrations of heavy metals detected in samples of the three fish species, were lower than the recommended maximum level allowed in food by (E.O.S.Q.C.2005), (fAO/WHO1999), (EOS 1993) and (WHO 1989).
Heavy metals
Nile tilapia
Common Carp
catfish
Muscles
Liver
gills
2016
07
01
103
112
https://ejabf.journals.ekb.eg/article_10611_439e0a4f1d9967c949b3a715cdd035b9.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Water quality and heavy metals monitoring in water and tissues of Nile tilapia fish from different governorates "Egyptian Aquaculture farms"
Neima A.
Ali
Maaly A.
Mohamed
Eman A. A.
Abd El-Hameed
All aquatic organisms are directly or indirectly affected by the physico-chemical characteristics of their environment, especially the chemical composition of the water, where it is the main factor affecting the cultured fish. So, the present study investigated the quality of water ponds and their impacts on fish reared in three different farms at Sahl El-Hussaynia, Sharkia governorate, Kafr El-Sheikh, governorate and at Sahl El-Tinna, Port-Saeed governorate, Egypt. Water and fish samples were taken during summer to evaluate the physico-chemical characteristics and heavy metals distribution in water and fish tissues (muscles, gill and liver). Moreover, the effect of accumulated heavy metals on glucose, total proteins and the activities of transaminases (AST and ALT) in the fish muscles was studied.Also, Physical and chemical characteristics of water (water temperature, pH, DO, NH3, No3, total alkalinity, total hardness and phosphate) were measured.
Heavy metals varied depending upon the organs and location. Also, the order of occurrence of heavy metals in water ranked at the following order; Zn> Fe> Cu> Cd at Sahl El-Hussaynia and Sahl El-Tinna farm but at Kafr El-Shiekh farm the order was Fe> Zn> Cu> Cd. Pb metal was not detected in the three farms. In the same time, the heavy metals were found in muscles, gills, and liver in the order Fe> Zn> Cu in the three fish farms, but Pb and Cd were not detected. In the liver, levels of the heavy metals exceeded the permissible limits according to WHO (1989). Moreover, in gills the levels of Zn exceeded the permissible limits at El–Hussaynia and Kafr El-Shiekh farms, but in muscles didn't exceed the permissible limits, except the Fe. The results of glucose, total protein, and activities of AST and ALT had some fluctuations in the serum among the studied fish.
Aquaculture
Heavy metals
physico-chemical characters
Nile tilapia
2016
07
01
113
123
https://ejabf.journals.ekb.eg/article_10987_de34954e66984a7c76558ce7e6e36b01.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2016
20
3
Physical, chemical and Actinobacterial characteristics of textile wastewater, Port Said, Egypt
Ahmed D.
El-Bassuony
Magdy M.
Bahgat
Sahar A.
El-Shatoury
Marwa S.
El Serafy
Wastewater originating from the textile-dying industries is a complex mixture of potentially polluted substances consisting of textile dyes, heavy metals associated with dyes and other auxiliaries used during dyeing process. The present study was conducted in an attempt to examine the physical, chemical and microbial changes as a result of industrial wastewater discharge into the main drain station in the industrial free zone area at Port Said, Egypt. Results showed that physical, chemical and microbial characteristics of water are deteriorated and many of these parameters figures exceeded the legislation limits. However, considering the textile industry, an increase is expected in concentrations of turbidity and TSS as a consequence of the exceeding amounts of fibers encountered in this industry 102 pure identified actinobacterial isolated previously were tested and proved to be capable of degrading industrial pollutants applied. The 102 isolates were screened to explore their capability with the effluent of the factory of Dolphin .Isolate N° Ndd7 proved and showed the highest ability to degrade the main dye used in the industrial process in the factory.
Wastewater
textile dyes Actinobacteria
heavy metal
2016
07
01
125
137
https://ejabf.journals.ekb.eg/article_10988_77e3dd66a1a21ae438919dc2ddc76fe3.pdf