2024-03-29T15:12:56Z
https://ejabf.journals.ekb.eg/?_action=export&rf=summon&issue=450
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Age, growth and reproductive biology of the keeled mullet Liza carinata from the Suez Bay, Red Sea, Egypt.
Azza
El-Ganainy
Fawzia
Abd El-Rahman
William
Rizkalla
Mazaya
Abo-Mesalem
Hamza
El-Shabaka
The age, growth and reproductive biology of the Liza carinata from the Suez Bay were studied. Age determination was based on otolith readings and validated by the decomposition of the seasonal length frequency distributions collected during the period from January 2009 to January 2011. The estimated von Bertalanffy growth equation was Lt = 21.279 (1 – e-0.463 (t + 0.325)). The fish grows allometrically (b = 2.8692; 95% CI: 3.1687-3.370) and relatively rapid, achieved more than 50% of the growth during the first year of life. Seasonal distribution ofgonado-somatic index(GSI) values showed that the main peak of GSI was in autumn. The seasonal development of maturity stages indicated that the spawning activity occurs during autumn. The size at which 50% of fishes are mature was 13.3 cm for males and 13.5 cm for females, which indicates that all individuals over two years of age were sexually mature. The absolute fecundity of the present species ranged from 60732.3 to 98549.3 eggs for fishes in the size ranging from 13.6 to 18.4 cm in total length. This study recommends altering the closer season in Suez Bay to be during autumn inorder to protect the spawning biomass of Liza carinata resources in the Bay.
Age
Growth
Spawning season
fecundity
Suez Bay
Liza carinata
2014
12
01
1
8
https://ejabf.journals.ekb.eg/article_2224_9d55b27dc0accef8e09f85e9ae0bcaa6.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Lipid chemistry of green macroalgae Ulva sp. a potential resource for biotechnological applications in the Southern Mediterranean Sea Coast, Alexandria shore, Egypt
Yasser
Moustafa
Ahmed
Batran
The nutritional value and chemical changes in the lipid content of the green macroalgae, Ulva sp., were assayed in the present study. Ulva samples were collected from two stations, Ras Al-Tin (station A) and El-Muntazah (Station B) alongAlexandria shore on the Mediterranean Sea, in twelve sampling periods (from January to December 2012). Each three samples of each station were plotted to represent one season. The chemical characterization of the lipid fractions wasperformed by gas liquid chromatography. The result showed that Ulva lipid content is relatively high (9.4±1.5 and 12.2±2.7%DW, at station A and B respectively) that can be explained by the higher pollution level at the station A. The fatty acids (FAs) of Ulva sp. lipidic extract mainly composed of palmitic, oleic and linoleic FAs. Saturatedfatty acids (SFAs) represented about 50% of the total FAs (TFAs). Monounsaturatedfatty acids (MUFAs) accounted for a high percent, 17.6-33.4% of TFAs.Polyunsaturated fatty acids (PUFAs) existed in a high percent in Ulva extraction reaching a maximum in winter and spring at both stations, about 38.4 and 30.5% of TFAs at station A and B, respectively. The high percent of PUFA can be attributed to the correlation between the low temperature and the degree of unsaturation. Also, the long chain fatty acids (C16 and C18) constitute more than 82% of the TFAs, which are the main components for biofuel. The results indicate that Ulva has a good potential for its use in human and animal food and health maintenance as a rich sourceof MUFAs and PUFA as well as in biodiesel production. Also, the wide ranges of the fatty acids indicate the possibility of manipulating the fatty acids profile through the cultivation conditions.
green macroalgae
Ulva
lipid chemistry
fatty acids profile
2014
12
01
9
20
https://ejabf.journals.ekb.eg/article_2225_17dc628304109fd3728ca5aaf9cad323.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Effect of different concentrations of Ethylenediaminetetraacetic Acid (EDTA) ongrowth performance and physiological aspects of Nile Tilapia, Oreochromis niloticus Fingerlings.
Mohamed
Ghanem
Ahmed
Hassan
Mohamed
Ahmed
The present study deals with the effect of different concentrations of EDTA (0, 0.1 & 0.3 g EDTA /L) on the growth in length, weight, survival rate, growth performance and physiological characters of the Nile tilapia, Oreochromis niloticusfingerlings reared in glass aquaria. The improvement of fish fingerlings development obtained by EDTA is dose-dependent. Fingerlings obtained from high concentration of EDTA (0.3 g EDTA /L) showed higher increase in length, weight and survival rate than those of low concentration (0.1 g EDTA /L) and control. The total weight gain,average daily gain and specific growth rate of O. niloticus, fingerlings improved with the high concentration of EDTA compared with the low concentration and control. The best feed conversion ratio (1.82) was recorded in the fish fingerlings exposed to 0.3 g EDTA/L compared with the control (2.1) and fingerlings exposed to 0.1 gEDTA/L (2.44). Biochemical analysis indicated that, EDTA in high concentrations are useful additives for isolated or/ and reducing dangerous substances from different fish tissues and surrounding media, thus improved the physiological responses.
EDTA
Growth performance
physiological aspects
Oreochromis niloticus
2014
12
01
21
36
https://ejabf.journals.ekb.eg/article_2226_47f47ee6752ac90596a9dd43ea230a70.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Molecular analysis of Brachidonte spharaonis (Fischer P., 1870) in Egypt reveals cryptic species complex.
Nancy
Radwan
Zakaria
Morsy
Mohammed
Ahmed
Nesreen
Ibrahim
Saad
Mohammed
Species and genetic diversity of the migrant Brachidonte spharaonis bivalve were studied along the Egyptian waters in order to determine the phylogenetic status of the species and to detect speciation with geographical isolation. Samples were collected from the Red Sea, Mediterranean Sea and Suez Canal. Genetic diversity was estimated using the DNA barcoding technique for mitochondrial CO1 gene. The DNA barcoding results showed that B. pharaonis collected from different localities were clustered in different clades indicating that the B. pharaonis population in the Egyptian coasts might form a cryptic species complex rather than a population of one species. These results may have a great impact on the conservation and fisheries status of B. pharaonis in the Egyptian waters.
Brachidontespharaonis
DNA barcoding
Cryptic species
CO1
2014
12
01
37
46
https://ejabf.journals.ekb.eg/article_2227_d522d200434b45003385983333204861.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Biochemical composition of the edible parts of the spider crab Schizophrys aspera in the Great Bitter Lake of the Suez Canal
Nesreen
Ibrahim
Spider crab Schizophrys aspera (Brachyura: Majidae) from Great Bitter Lake of the Suez Canal was studied during the spawning season for total edible yield, moisture, total protein, total lipid and total carbohydrate in the edible tissue. Totaledible yield, muscle yield and GSI yield in male and female spider crab were compared. Results showed that male muscle yield (32%) was greater than that of female (28%), whereas female GSI yield (5.7%) was higher than that of male (1.3%). No significant differences in total edible yield between both sexes. Regarding to moisture, it was noticed that the muscle moisture (73.5 %) was greater than that of the gonad (69.9 %). Comparing between both sexes, it was detected that male muscle moisture (76.5 %) and male gonad moisture (73.2 %) were greater than that of female(74.9 % and 70.1 %, respectively). Study of the biochemical composition in spider crab showed that gonad had higher protein, lipid and carbohydrate levels than those of muscle. Also, it was noticed that there is a difference between male and female in biochemical composition. Female spider crab showed a higher levels of protein, lipidand carbohydrate than male. The present work concludes that muscle and gonad of this crab contain high level of protein and low level of lipid and carbohydrate. These results suggest that spider crab is healthy for human consumption and is also suitable for processing into different crab products.
Schizophrys aspera
Great Bitter Lake
edible yield
Biochemical composition
2014
12
01
47
54
https://ejabf.journals.ekb.eg/article_2228_08c966120369b1231aad9e977c2190e5.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Molecular Phylogeny of four bivalve species collected from Egyptian Mediterranean and Red Sea based on mitochondrial CO1 gene sequences
Nancy
Radwan
Zakaria
Morsy
Mohammed
Ahmed
Nesreen
Ibrahim
Saad
Mohammed
The marine bivalve (family Veneridae and Mytilidae) are dominant groups in terms of species numbers, diversity of habitat and economical importance. The aim of the current study is to gain new insights onto the phylogeny of four different species of bivalvein Egypt. Partial sequence of the mitochondrialcytochrome oxidase subunit 1 (CO1) is sequenced to assess whether different species of bivalve could be distinguished by DNA barcoding technique. The obtained molecular results revealed the efficacy of DNA barcoding in species identification and differentiation between the different species.
Phylogeny
DNA barcoding
mitochondrial cytochrome oxidase subunit 1 (CO1)
2014
12
01
55
61
https://ejabf.journals.ekb.eg/article_2229_47bc59618de82f5eb37dc01a49846496.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Abundance and diversity of reef fish larvae in Mabahiss Bay, on the Egyptian Red Sea coast
Mohammed
Abu El-Regal
Mohammed
Abu Zeid
Ahmed
Hellal
Mahmoud
Maaty
The larvae of coral reef fishes have been studied in order to determine the composition of fish larval community in Mabahiss bay located at Hurghada on the Egyptian Red Sea coast. Fish larvae were collected monthly from November 2012 to October 2013 by plankton net of 0.5 mm mesh size.A total of 1336 fish larvae comprising 57 fish taxa were recorded from all habitats. The highest number of larvae (517) was collected from the open water areas,whereas the lowest of 129 larvae were taken from seagrass areas. The highest number of species was recorded from the open water areas (39 taxa), while the lowest number of species was taken from the seagrass area (19 taxa).Results obtained from the present study reflect the importance of different Red Sea habitats to the early life history of reef fishes and how they could support these stages.
reef fish
Larvae
habitats
spatial distribution
Red Sea
2014
12
01
63
79
https://ejabf.journals.ekb.eg/article_2230_d2a022e37c0fa28753b29156f563bb22.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Incorporation of silverside meal to enhance diet palatability, growth performance and body composition of fingerlings sole Solea aegyptiaca (Chabanaud, 1927)
Abdel Moneim
Yones
Ataallah
Metwalli
The present study was conducted to determine the effects of use silverside meal to enhance palatability, growth performance and body composition of fingerlings sole fish fed on plant based diets. Two sources of plant protein (soybean and corn glutein meal) were replacing silverside meal in tested diets. Five diets were formulated with different inclusion levels of plant protein based diets (PP0, PP25, PP50, PP75 and PP100%). The silverside fish (Atherina boyeri) was added to the diets as local animal protein source, replacer to fish meal and to enhance palatability of the testdiets. Fingerlings sole with an initial weight of (8.65±0.2g) were distributed 100 fingerlings in each tank, with a volume of 2m3. Fish were fed on the artificial diets as 3% of the fish biomass daily divided into two equalportions. Fish were organized in triplicate groups/diet and the experimental period lasted 120 days after start. The results showed significant differences (P<0.05) in growth performance and feed efficiency between diets. The highest performances in terms of (Final weight, Weight gain, Average daily gain, Specific growth rate, Condition factor, Feed conversion ratio, Protein efficiency ratio, Net protein utilization and Hepatosomatic index) were obtained with the PP75, PP0, PP50 and PP25%, without significance difference between them. However, fish fed on PP100 % diet showedsignificant differences (P<0.05) with decreased growth performance and feed efficiency compared to the other tested diets. Non-significant differences (P<0.05) in the whole body chemical composition (dry matter, crude protein,crude lipid and ash) were found between fish fed on all experimental diets. The results of the present study indicated that PP75% inclusion level, which reduce silverside meal and increase alternative plant protein sources infingerlings sole, Solea aegyptiaca diet can be used without negative effects on growth performance and feed efficiency.
Solea aegyptiaca
silverside fish
plant protein
inclusion level
Growth performance
2014
12
01
81
94
https://ejabf.journals.ekb.eg/article_2231_479a4a5a1c11f97505276e9a089024aa.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Trends in artisanal fisheries of Bardawil lagoon with reference to shrimp bottom trawling (kalsa)
El-Azab
El-Bokhty
Attia
El-Aiatt
Bardawil lagoon is one of the most important fishing grounds in Egypt, since it is the least polluted lagoon in Egypt and in the whole Mediterranean as well as the majority of fish species are exported. Analysis of fish yields and efforts performed in Bardawil lagoon during the period 2003-2012 was done. Production trends of yearly total fish yields revealed an increasing trend with decreasing increments (R2=71.9, P=0.018). The same trends were observed for both crabs (R2 = 76.9, P=0.003), shrimps (R2= 58.9, P=0.04) and sea bream (R2=57.7, P=0.05), while that of familyMugilidae revealed increasing trends along the period of study (R2=28.0) with insignificant relationship.Analysis of efforts exerted by shrimp trawl net revealed that the number of hauls seems to be the controlling factor as stepwise regression between the different catches resulting from the shrimp bottom trawl net and the number of hauls had shown significant relationships except large shrimps which showed insignificant relationship.Banning of fishing by shrimp trawl net should be superior more than further studies to develop such fishing method, as there is an alternative eco-friendly shrimp fixed traps which should be used. In addition to its destruction effect to the bottom habitats and bottom flora which acts as shelter and spawning areas for many fish species.
Artisanal fisheries
Bardawil Lagoon
shrimp bottom trawling
2014
12
01
95
107
https://ejabf.journals.ekb.eg/article_2232_55c602ebf30869ccacc39aadf23e7094.pdf
Egyptian Journal of Aquatic Biology and Fisheries
Egypt. J. of Aquatic Biolo. and Fish.
1110-6131
1110-6131
2014
18
4
Food and Feeding Habits of Sarpa salpa Salema (family: Sparidae) in the Libyan Coast of the Mediterranean Sea
Ashraf
Ahmed
Salah
El-Etreby
Magdy
Alwany
Randa
Ali
A total of 378 fish of Sarpa salpa were collected from eastern coast Libya 16 month period for biological study of food and feeding habits numerical method and the percentage of fish that contain low empty stomach. It was found that sea grasses is the main food of these fish that depend on it by 79.10% and following by algae with 15.10% and 4.33% crustaceans and there is no clear relationship between the lengths of these fish and the size of the food they eat.
food and feeding habits
Sarpa salpa
Libyan coast
Mediterranean Sea
2014
12
01
109
113
https://ejabf.journals.ekb.eg/article_2233_33f74b6d19e94192d844aa0a39183fa4.pdf