Egyptian Journal of Zoology最新文献_第8页

NEW RECORD OF ABBREVIATA LEPTOSOMA GERVAIS, 1848 (SPIRURIDA: PHYSALOPTERIDAE) INFECTION IN TWO SPECIES OF LIZARDS IN NORTH AND SOUTH SINAI, EGYPT 埃及西奈半岛南北两种蜥蜴感染简写leptosoma gervais, 1848(螺旋体目:physalopteridae)新记录

Egyptian Journal of Zoology Pub Date : 2019-08-02 DOI: 10.12816/EJZ.2019.13977.1011

S. Harras, Rasha Elmahy

{"title":"NEW RECORD OF ABBREVIATA LEPTOSOMA GERVAIS, 1848 (SPIRURIDA: PHYSALOPTERIDAE) INFECTION IN TWO SPECIES OF LIZARDS IN NORTH AND SOUTH SINAI, EGYPT","authors":"S. Harras, Rasha Elmahy","doi":"10.12816/EJZ.2019.13977.1011","DOIUrl":"https://doi.org/10.12816/EJZ.2019.13977.1011","url":null,"abstract":"Studies on parasitic nematode infection in lizards are rare, and the available literature on their accurate morphological description especially by scanning electron microscopy (SEM) is lacking. Therefore, the aim of the present work isto identify new records of nematode parasites infecting Agamidae lizards, which are widely distributed in North and South Sinai; this entails giving a full morphological picture using light microscopy and SEM. Seventeen samples of Trapelus mutabilisand ten samples of Pseudotrapelus sinaitus (collected from North and South Sinai) were dissected and examined for their nematode parasitic infection. Adult nematodes were collected from the stomach and the upper part of the small intestine, identified, and fully described using light microscopy and SEM. Abbreviata leptosoma was collected for the first time from Egyptian T. mutabilis and P. sinaitus in a prevalence of 11.8% and 30.0% with mean intensity ± standard deviation equals 8.5±7.8 and 4.3±3.2, respectively. A. leptosoma was identified based on the morphological characteristics of both male and female including the cephalic denticulation with 5-8 elements between submedian teeth and lateral tooth, absence of denticulate crest at the dorsal and ventral angles of the mouth, presences of two branched uteri and very unequal dissimilar spicules. The study gives a full SEM description of A. leptosoma.Thus,North and South Sinai are considered as new geographical localities for A. leptosoma infecting Agamidae lizards.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75880371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

EFFECT OF CUCUMIS MELO VAR. FLEXUOSUS LEAVES EXTRACT ON RENAL OXIDATIVE INJURY AND INFLAMMATION IN DIABETIC MALE ALBINO RATS 甜瓜叶提取物对糖尿病雄性白化大鼠肾脏氧化损伤及炎症的影响

Egyptian Journal of Zoology Pub Date : 2019-06-30 DOI: 10.12816/EJZ.2019.10515.1007

A. El-Maksoud, A. Marwa

{"title":"EFFECT OF CUCUMIS MELO VAR. FLEXUOSUS LEAVES EXTRACT ON RENAL OXIDATIVE INJURY AND INFLAMMATION IN DIABETIC MALE ALBINO RATS","authors":"A. El-Maksoud, A. Marwa","doi":"10.12816/EJZ.2019.10515.1007","DOIUrl":"https://doi.org/10.12816/EJZ.2019.10515.1007","url":null,"abstract":"Kidney disorders are common complications of uncontrolled diabetes. The present study aimed to evaluate the effect of oral administration of Cucumis melo var. flexuosus (snake melon or faqqous) leaves extract in three different doses (30, 60 and 120 mg/kg body weight) for 30 consecutive days on renal damage and inflammation in streptozotocin (STZ)-induced diabetic male albino rats (single intraperitoneal injection of 60 mg STZ/kg body weight). The results showed that the snake melon leaves extract induced a significant decrease in the plasma level of the kidney injury molecule-1 (KIM-1) in the diabetic rats. In addition, the snake melon leaves extract caused a significant decrease in the levels of the renal thiobarbituric acid reactive substances (TBARS), tumor necrosis factor alpha (TNF-α), interleukin (IL)-6, and caspase-3 of the diabetic rats. On the other hand, renal catalase (CAT) and superoxide dismutase (SOD) activities, as well as renal vascular endothelial growth factor (VEGF) level, were elevated significantly in the diabetic rats treated only with 60 mg or 120 mg of the snake melon leaves extract/kg body weight (compared with the diabetic control rats). In conclusion, the results of the present study revealed that the snake melon leaves extracts have a potential and effective role in inhibiting inflammation and oxidative stress in the kidney of diabetic rats.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"64 1","pages":"13-20"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88219433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

BLOOD RESPIRATORY FUNCTIONS IN STREPTOZOTOCIN-INDUCED DIABETIC MALE ALBINO RATS TREATED WITH CUCUMIS MELO VAR. FLEXUOSUS LEAVES EXTRACT 甜瓜叶提取物对链脲佐菌素诱导的糖尿病雄性白化大鼠血液呼吸功能的影响

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.12816/EJZ.2019.11225.1008

Aziza El-Shafey, M. El-Maksoud, Doaa S. Ibrahim

{"title":"BLOOD RESPIRATORY FUNCTIONS IN STREPTOZOTOCIN-INDUCED DIABETIC MALE ALBINO RATS TREATED WITH CUCUMIS MELO VAR. FLEXUOSUS LEAVES EXTRACT","authors":"Aziza El-Shafey, M. El-Maksoud, Doaa S. Ibrahim","doi":"10.12816/EJZ.2019.11225.1008","DOIUrl":"https://doi.org/10.12816/EJZ.2019.11225.1008","url":null,"abstract":"Cucumis melo var. flexuosus (L.), snake melon or faqqous, is an ancient plant crop in many different parts of the world. The present study was designed to evaluate the efficacy of faqqous leaves extract on some blood respiratory functions in streptozotocin (STZ)-induced diabetic rats. Thirty five male albino rats were used in the current study and randomly divided into five groups: non-diabetic control group, diabetic control group (received a single intraperitoneal injection of 60 mg STZ/kg body weight), and other three diabetic groups treated orally with different doses of faqqous leaves extract (30, 60 or 120 mg/kg body weight) for 30 consecutive days. Induction of diabetes by STZ caused a significant decrease (P < 0.05) in most venous blood parameters including hemoglobin (Hb) content, hematocrit (Hct) value, oxygen partial pressure (PO2), percentage of O2 saturation (% O2), carbon dioxide partial pressure (PCO2), and the concentrations of bicarbonate (HCO3-), total CO2, and base excess (BE-), as well as the logarithm of hydrogen ion (pH) of the arterial blood. Faqqous leaves extract (especially at 120 mg/kg body weight) modulated significantly almost all these changes in the blood of diabetic rats. Oxygen dissociation curve (ODC) shifted to the left in the diabetic control group compared with the non-diabetic control one; but shifted to the right in the diabetic groups treated withfaqqous leaves extract. In conclusion, dietary supplementation of faqqousleaves extract improved significantly the blood respiratory functions of diabetic rats.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86124585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PROTECTIVE EFFECT OF ELLAGIC ACID AGAINST CYCLOSPORINE A-INDUCED RENAL HISTOPATHOLOGICAL AND ULTRASTRUCTURAL CHANGES, AND OXIDATIVE STRESS IN MALE ALBINO RATS 鞣花酸对环孢素a诱导的雄性白化大鼠肾脏组织病理和超微结构改变及氧化应激的保护作用

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.12816/EJZ.2019.36886

S. R. Galaly, Manal Abdul-Hamid, R. Ahmed

{"title":"PROTECTIVE EFFECT OF ELLAGIC ACID AGAINST CYCLOSPORINE A-INDUCED RENAL HISTOPATHOLOGICAL AND ULTRASTRUCTURAL CHANGES, AND OXIDATIVE STRESS IN MALE ALBINO RATS","authors":"S. R. Galaly, Manal Abdul-Hamid, R. Ahmed","doi":"10.12816/EJZ.2019.36886","DOIUrl":"https://doi.org/10.12816/EJZ.2019.36886","url":null,"abstract":"Cyclosporine A (CsA) is an effective immunosuppressor agent, which is used in preventing graft rejection and in treating autoimmune diseases. The present study aimed to investigate the protective effect of ellagic acid (EA) against CsA-induced renal toxicity in male albino rats. Animals were divided into six groups, each of seven rats: the 1st group was used as a control, the 2nd group received a subcutaneous injection of slightly alkaline solution, the 3rd group received orally olive oil, the 4th group was injected subcutaneously with EA (10 mg/kg body weight, dissolved in slightly alkaline solution), the 5th group was orally treated with CsA (15 mg/kg body weight, dissolved in olive oil), and the 6th group was treated simultaneously with CsA and EA, daily for 30 days. The results indicated that CsA induced a significant increase in renal lipid peroxidation and a significant decrease in renal catalase and peroxidase activities, and reduced glutathione concentration. Histopathological changes of the renal cortex region of CsA-administrated rats revealed vacuolated cytoplasm of the epithelial cells and fibrosis, while the renal medullary region showed tubular calcification or casts, and damaged collecting tubules. Ultrastructural changes included marked degeneration of glomeruli, multiple cytoplasmic vacuoles of the cuboidal epithelial cells, thickened basal lamina, and sparse short microvilli of the proximal tubules. Treatment with EA simultaneously with CsA resulted in a significant alleviation of the renal histopathological and ultrastructural changes, and oxidative stress. Thus, it is recommended to use EA to alleviate CsA-induced renal toxicity due to its antioxidant effects.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76821179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EFFECTS OF VIRGIN COCONUT OIL AND LAURIC ACID “WITH OR WITHOUT 5-FLUOROURACIL” ON DIMETHYLHYDRAZINE-INDUCED HEPATOTOXICITY IN MALE RATS 初榨椰子油和月桂酸“加或不加5-氟尿嘧啶”对二甲肼诱导的雄性大鼠肝毒性的影响

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.12816/EJZ.2019.63568

Adel A. El Bagoury, Hala El-Tantawi, S. El-Naggar, Amel M. Kwilla, Amal M. Khalaf

{"title":"EFFECTS OF VIRGIN COCONUT OIL AND LAURIC ACID “WITH OR WITHOUT 5-FLUOROURACIL” ON DIMETHYLHYDRAZINE-INDUCED HEPATOTOXICITY IN MALE RATS","authors":"Adel A. El Bagoury, Hala El-Tantawi, S. El-Naggar, Amel M. Kwilla, Amal M. Khalaf","doi":"10.12816/EJZ.2019.63568","DOIUrl":"https://doi.org/10.12816/EJZ.2019.63568","url":null,"abstract":"Dimethylhydrazine (DMH) is highly toxic for the different body organs, including the liver. The current study aimed to investigate the potential protective role of virgin coconut oil (VCO) and lauric acid (LA) in presence/absence of a chemotherapy drug “5-fluorouracil (5-FU)” against the hepatoxicity induced by DMH in male rats (Rattus norvegicus). Ninety rats were randomly divided into nine groups (n = 10). (G1) control group; (G2) rats received 4 mL VCO/kg body weight (b.wt) , orally/day after day for six weeks starting from week 13; (G3) rats received LA (200 mg/kg b.wt), orally/day after day for six weeks as in G2; (G4) rats were injected subcutaneously (s.c.) with DMH (20 mg/kg b.wt), once/week for the first six weeks; (G5) rats received DMH as in G4 and intraperitoneally (i.p.) injected with 5-FU (75 mg/kg b.wt), once/week starting from week 13 for three successive weeks; (G6) rats received DMH and VCO as in G4 and G2, respectively; (G7) rats received DMH and LA as in G4 and G3, respectively; (G8) rats received DMH, 5-FU, and VCO as in G4, G5, and G2, respectively; (G9) rats received DMH, 5-FU, and LA as in G4, G5, and G3, respectively. The results showed that DMH injection caused oxidative stress and histopathological alterations in the liver tissue, as well as dyslipidaemia. However, treatment of male rats with VCO or LA in presence/absence of 5-FU reduced significantly the DMH-induced hepatotoxicity.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"183 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90986003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EFFECT OF CUCUMIS MELO VAR. FLEXUOSUS LEAVES EXTRACT ON RENAL OXIDATIVE INJURY AND INFLAMMATION IN DIABETIC MALE ALBINO RATS 甜瓜叶提取物对糖尿病雄性白化大鼠肾脏氧化损伤及炎症的影响

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.21608/ejz.2019.10515.1007

Marwa A. E. Abd El-Maksoud

引用次数: 2

MONOSODIUM GLUTAMATE-INDUCED LIVER MICROSCOPIC AND BIOCHEMICAL CHANGES IN MALE RATS, AND THE POSSIBLE AMENDMENT OF QUERCETIN 谷氨酸钠诱导雄性大鼠肝脏微观生化变化及槲皮素可能的修正作用

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.12816/EJZ.2019.37158

R. Ahmed, Manal Abdul-Hamid, S. R. Galaly, H. M. Hamdalla

{"title":"MONOSODIUM GLUTAMATE-INDUCED LIVER MICROSCOPIC AND BIOCHEMICAL CHANGES IN MALE RATS, AND THE POSSIBLE AMENDMENT OF QUERCETIN","authors":"R. Ahmed, Manal Abdul-Hamid, S. R. Galaly, H. M. Hamdalla","doi":"10.12816/EJZ.2019.37158","DOIUrl":"https://doi.org/10.12816/EJZ.2019.37158","url":null,"abstract":"The safety of using monosodium glutamate (MSG) as a food flavour enhancer has generated much controversy locally and globally. Quercetin (QU), a natural compound of multiple origins, has broad biopharmacological effects as an antioxidant and a hepatoprotective substance. Therefore, the present study was designed to investigate the modulatory effect of oral doses of QU on the microscopic liver changes and liver oxidative stress induced by MSG. Thirty male albino rats were divided into five groups, each of six rats: group I received distilled water, group II received corn oil, group III was administered QU (14 mg/kg body weight), group IV was treated with aqueous MSG (15 mg/kg body weight), and group V was given MSG (15 mg/kg body weight) simultaneously with QU (14 mg/kg body weight), orally and daily for 30 days. Numerous deleterious histological and ultrastructural changes were induced by MSG in concomitant with a significant increase in the activities of serum aminotransferases (ALT and AST) and the level of hepatic lipid peroxidation, while decreases in superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities, as well as reduced glutathione (GSH) concentration were also recorded. QU administration amended the liver histological lesions and ultrastructural changes induced by MSG via decreasing significantly the level of hepatic lipid peroxidation and the leakage of serum aminotransferases, and improving the hepatic antioxidant defence system. In conclusion, QU showed a hepatoprotective activity against the potential toxicity of MSG food flavour.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79078211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

EFFECTS OF DRINKING WATER CONTAINING ALUMINUM AND FLUORIDE SALTS ON THE LEARNING BEHAVIOR AND BRAIN NEUROTRANSMITTERS OF MALE RAT OFFSPRING 饮水含铝和氟盐对雄性大鼠后代学习行为和脑神经递质的影响

Egyptian Journal of Zoology Pub Date : 2019-06-01 DOI: 10.12816/EJZ.2019.9821.1006

A. A. Kinawy

{"title":"EFFECTS OF DRINKING WATER CONTAINING ALUMINUM AND FLUORIDE SALTS ON THE LEARNING BEHAVIOR AND BRAIN NEUROTRANSMITTERS OF MALE RAT OFFSPRING","authors":"A. A. Kinawy","doi":"10.12816/EJZ.2019.9821.1006","DOIUrl":"https://doi.org/10.12816/EJZ.2019.9821.1006","url":null,"abstract":"The widely existence of aluminum and fluoride in the environment makes the exposure to these pollutants unavoidable. Few studies reported the toxic impact of these pollutants \"separately\" on the neurotransmitters involved in the cognitive behavior of rodent offspring. The present study aimed to evaluate the potential impact of these pollutants \"together\" on the amino acid neurotransmitters of different brain regions (cerebral cortex, hypothalamus and hippocampus) and the learning ability of male rat offspring. The rat offspring were exposed to deionized water containing 0.5 g AlCl3/L, 0.15 g NaF/L, or their combination throughout the prenatal period of brain growth in the uterus (via the placenta) and the postnatal period until 70 days old (via lactation and drinking water). The results indicated that the levels of most excitatory and inhibitory amino acid neurotransmitters were significantly affected in the three brain regions of exposed male offspring to AlCl3 and/or NaF, as compared with the control male offspring. In addition, the learning ability was more affected in the male offspring exposed to AlCl3 plus NaF, a finding that indicates a synergistic effect. The alteration in the learning ability of rat offspring exposed to AlCl3 plus NaF was concomitant with the increase in the cerebral cortical glycine, hypothalamic and hippocampal γ-aminobutyric acid, and hippocampal glutamate. In conclusion, administration of the AlCl3 plus NaF was more neurotoxic than each salt alone.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84794199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

THE TOXIC EFFECT OF MULTI WALL CARBON NANOTUBES ON SWISS ALBINO RAT 多壁碳纳米管对瑞士白化大鼠的毒性作用

Egyptian Journal of Zoology Pub Date : 2018-12-01 DOI: 10.12816/EJZ.2018.26954

S. El-sayed, Neamat H Ahmed, K. Ahmed, A. Issa

{"title":"THE TOXIC EFFECT OF MULTI WALL CARBON NANOTUBES ON SWISS ALBINO RAT","authors":"S. El-sayed, Neamat H Ahmed, K. Ahmed, A. Issa","doi":"10.12816/EJZ.2018.26954","DOIUrl":"https://doi.org/10.12816/EJZ.2018.26954","url":null,"abstract":"Production and usage of multi-walled carbon nanotubes (MWCNTs) have widely increased over the last years. Nanoparticles with their sizes below 100 nm are able to enter and be stored in organs (such as liver, lung, testes and brain) and caused toxic effects. The aim of the present study is to investigate the MWCNTs toxicity, if any, on liver tissue. A total number of fifteen male albino rats were used in the present study; five rats as control and ten rats were intravenous injected with a single dose of MWCNTs (30 mg/ kg body weight, 20-50 nm in diameter and 1 µm in length). Histopatholgical, histochemical, apoptotic, necrotic and ultra-structure studies were carried out in the present work. The results showed different histopathological changes on liver tissues of MWCNTs-treated rats, such as focal hepatic necrosis with inflammatory cells infiltration, hydropic degeneration of hepatocytes, and some increases in collagen fibers deposition in the portal area after 28 days of MWCNTs injection. High appearance of necrotic and apoptotic cells was also noticed. Ultrastructure study of liver tissue of rats treated with MWCNTs showed abnormal hepatocytes with irregular nuclear envelope and nuclear chromatin material, swollen and fused mitochondria with destructed cristae, lysis of some cytoplasmic organelles and rupture of the endoplasmic reticulum. Shrunken nucleus and abundance of vacuoles and lysosome were also observed in the hepatocytes. It could be concluded that MWCNTs have a toxic effect on liver tissue and hepatocytes of rats.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77210609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BIOLOGICAL MANAGEMENT OF WHITE SEA BREAM DIPLODUS SARGUS (LINNAEUS, 1758) IN THE EASTERN MEDITERRANEAN, COAST OF NORTH SINAI, EGYPT 埃及北西奈海岸东地中海白海鲷(linnaeus, 1758)的生物管理

Egyptian Journal of Zoology Pub Date : 2018-12-01 DOI: 10.12816/EJZ.2018.27237

A. El-Aiatt, K. Shalloof

{"title":"BIOLOGICAL MANAGEMENT OF WHITE SEA BREAM DIPLODUS SARGUS (LINNAEUS, 1758) IN THE EASTERN MEDITERRANEAN, COAST OF NORTH SINAI, EGYPT","authors":"A. El-Aiatt, K. Shalloof","doi":"10.12816/EJZ.2018.27237","DOIUrl":"https://doi.org/10.12816/EJZ.2018.27237","url":null,"abstract":"The goal of the present study is to give basic information required for managing sea bream, Diplodus sargus.Samples of the studied fish (7.0-34.7 cm total length and 15.5-833.2 g total weight), were collected from January, 2016 to December, 2016from Eastern Mediterranean, coast of North Sinai. The relationship between length and weight was estimated as W = 0.0244*L2.98. Age was determined by otolith, where age groups I to V years were established. Growths in length at the end of each year were calculated as 13.44, 19.00, 23.81, 27.58 and 30.01 cm for the 1st, 2nd, 3rd, 4th and 5th year of life, respectively. The growth parameters of von Bertalanffy parameters were calculated as L∞= 40.06 cm, K = 0.2445 year-1 and t0 = -0.6711 years. Growth performance index φ′ = 2.59, as well mortality rates, were 0.7582, 0.3356 and 0.4226 yr−1 for total, natural and fishing mortality respectively. The currently exploitation rate was E = 0.56. The length and age at first capture (Lc) (Tc) were 17.7 cm and 1.7 years respectively. So, the current mesh size should be increased to maximize the length at first capture (Lc)to 22.7 cm, which achieve the highest yield per recruit at current fishing effort.","PeriodicalId":11659,"journal":{"name":"Egyptian Journal of Zoology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89848500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0