The Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt16223410.21608/ejabf.2015.2234ENSahar MehannaNational Institute of Oceanography and Fisheries, Fisheries Division, Fish Population
Dynamics Dept., Suez, Egypt.Asaar El-SherbenyNational Institute of Oceanography and Fisheries, Fisheries Division, Fish Population
Dynamics Dept., Suez, Egypt.Magdy KhalilAin Shams University, Faculty of Science, Zoology Dept., Cairo, EgyptMahmoud AhmedNational Authority for Remote Sensing and Space Science, Agriculture Applications,
Soil and Marine Science Division, Marine Science Dept., Cairo, Egypt.Sameh KafrawyNational Authority for Remote Sensing and Space Science, Agriculture Applications,
Soil and Marine Science Division, Marine Science Dept., Cairo, Egypt.Journal Article20170404The stock of Japanese scad Decapterus maruadsi was assessed based on 1864 specimen (combined sexes), collected from the Gulf of Suez during the fishing season 2011/2012. The growth parameters (L∞ & K) have been estimated from length frequency distribution data, and the obtained values were L∞ = 27.31 cm TL and K = 0.53/y. The instantaneous rates of total (Z), natural (M) and fishing (F) mortalities were 1.80, 0.61 and 1.19/y respectively with exploitation ratio (E) of 0.66/y which reflects an over exploitation situation. The estimated length at first capture (Lc) was<br />12.2 cm, while the length at first sexual maturity (Lm) was 12.3 cm. The relative yield per recruit analysis shows that the stock of D. maruadsi is overexploited and needs to develop a management strategy to conserve and optimize its yield.https://ejabf.journals.ekb.eg/article_2234_7dbd206ec01b9b48713655b87e6a3428.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Morphological, histological and ultrastructural studies on the ovaries of Liza carinata from the suez bay in correlation with its reproductive cycle736226510.21608/ejabf.2015.2265ENFawzia Ashour Abd El-GhafarAbd El-RahmanDepartment of Zoology, Faculty of Science, Ain Shams University, Abbassia, Cairo,
Egypt.0000-0002-2204-283xHamza El-ShabakaDepartment of Zoology, Faculty of Science, Ain Shams University, Abbassia, Cairo,
Egypt.William RizkallaDepartment of Zoology, Faculty of Science, Ain Shams University, Abbassia, Cairo,
Egypt.Mazaya Abo-MosallamDepartment of Zoology, Faculty of Science, Ain Shams University, Abbassia, Cairo,
Egypt.Azza El-GanainyNational Institute of Oceanography and Fisheries, Suez branch, 183, Suez, Egypt.Journal Article20170404Liza carinata is considered as a common and economically important Mugilidae<br />fish of the Red Sea. Knowledge of the gonadal cycle in fishes has a great importance<br />in the successful management of fisheries. The present study was undertaken to gain<br />more information about the morphological, histological and ultrastructural aspects of<br />the ovaries of L. carinata during the different seasons of its reproductive cycle in the<br />Suez Bay.<br />The maturity stages of the ovaries of L. carinata can be classified into four<br />stages, namely: the early post-spawning, late post-spawning, pre-spawning and<br />spawning stages. Besides, L. carinata spawns from late September to late December.<br />Moreover, the oogenesis of L. carinata is divided into seven stages. These stages are<br />the oogonia, chromatin-nucleolar, early peri-nucleolar, late peri-nucleolar, vacuolated,<br />early yolk globular and late yolk globular stages. In addition, the ovaries also contain<br />the post-ovulatory structures and atretic follicles. The former are formed of the<br />hypertrophied follicular cells after the discharge of the mature ovum, while the latter<br />are formed as a result of the sudden cease growth of the oocytes. The present<br />observations may help in understanding the strategy of reproduction of L. carinata in<br />the Suez Bay that may help in its aquaculture.https://ejabf.journals.ekb.eg/article_2265_2e463fa5ba82c2ebe1b84e9ef1d95773.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Reproductive cycle of the broomtail wrasse, Cheilinus lunulatus inhabiting coral reef in Hurghada, Red Sea, Egypt.3754223610.21608/ejabf.2015.2236ENAhamad Azab1Marine Biology branch, Zoology Depart., Faculty of Science, Al-Azhar
University, Cairo, EgyptHassan Khalaf-AllahMarine Biology branch, Zoology Depart., Faculty of Science, Al-Azhar
University, Cairo, EgyptMostafa MousaNational institute of Oceanography and fisheries, AlexandriaMosab AliMarine Biology branch, Zoology Depart., Faculty of Science, Al-Azhar
University, Assiut branch.Journal Article20170404The present study deals with demonstrate the reproductive cycle of the broomtail wrasse, Cheilinus lunulatus which monthly collected from coral reef in Abu Galawa lagoon, Hurghada, Red Sea, during the period from December 2011 to<br />November 2012. Results showed that, the averages of male and female gonadosomatic indices (GSI) were gradually increased during spring and summer months. Irregular trend was recorded to the female hepatosomatic index during all months of the year. It may be due to partially spawning in this fish. Shape, weight, size, colour, texture and structure of gonads were changed with the change of maturity stages. The testicular activity can be classified into five stages: immature stage, stimulating spermatogenesis, rapid spermatogenesis, mature (ripe) testis and Spent testis. Seven stages were recognized during the ovarian activity (previtellogenesis, earlyvitellogenesis,<br />mid-vitellogensis, late-vitellogenesis, pre-spawning, ripe and spent stages). The tsticular and ovarian developments were initiated when the day length (photoperiod) and water temperature had begun to increase during March to April. During May to August, however, the gradual increase of both photoperiod and water temperature reached its maximum values, gonads had ensured completion of testicular and ovarian development. It was concluded that Cheilinus lunulatus in Abu-Galawa lagoon of Hurghada, partially spawned during a long spawning season, which extended from May to October. It synchronizes between both males and females with coordination to increasing of both photoperiod and water temperature.https://ejabf.journals.ekb.eg/article_2236_d7eeafc36199d05d2480283baab24925.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Evaluation of Cladophora laetevirens (Chlorophyta) and Patella caerulea (Mollusca) as bioindicators for heavy metals Pollution at Al-Hanyaa Mediterranean Coast, Libya.5563224610.21608/ejabf.2015.2246ENMagda El-AdlBotany Department, Faculty of Science, Damietta University-Egypt. Current address:
Botany Department, Faculty of Education (Al-Qubba), Omar Al-Mukhtar University,Ahmed BreamZoology Department, Faculty of Sciences, Al – Azhar University, Nasr City, Cairo, EgyptJournal Article20170404This study was designed to evaluate the new record seaweed Cladophora<br />laetevirens (Dillwyn) Kützing (Chlorophyta: Cladophorales) and Patella caerulea<br />Linnaeus (Mollusca: Gastropoda) as bioaccumulating agents. The samples of two<br />species were collected from polluted and unpolluted (reference) sites from the rocky<br />shores of Al-Hanyaa coasts, Libya. Zinc (Zn), cadmium (Cd), lead (Pb) and copper<br />(Cu) were determined using voltammetric technique. The results exhibited that, Cu<br />occupied the highest level (559.15 ± 68.55 μg g-1 fresh weights) among metals<br />accumulated by Cl. laetevirens in polluted site, followed by Pb and vice versa in<br />unpolluted site, where Pb attained 179.71 ± 31.19 μg g-1 fresh weight. Despite that Cd<br />has minimal concentration levels (either in Cl. laetevirens or P. caerulea tissues, at<br />both sites), it recorded maximal bioaccumulation factors (BAFs) for Cl. laetevirens in<br />both sites. Metal pollution index (MPI) recorded in a descending order as: Cl.<br />laetevirens > P. caerulea gut > P. caerulea muscle for both sites. Cadmium was<br />positively correlated with Cu and Pb in both sites. The present data and their analysis<br />proved the consistency, appropriateness, tolerance and reliability of Cl. laetevirens as<br />a bioindicator regardless the metal concentration levels in seawater. These results<br />confirmed that Cl. laetevirens is the strongest accumulator for Cu, Pb and Cd while P.<br />caerulea is a potential accumulator for Zn.https://ejabf.journals.ekb.eg/article_2246_d04e0107c39483556ba14354900d1d15.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Morphological and histological studies on the pituitary gland of Liza carinata from the Suez Bay (Red Sea, Egypt), with special reference to the gonadotrophs65822287110.21608/ejabf.2015.22871ENFawzia Ashour Abd El-GhafarAbd El-RahmanDepartment of Zoology, Faculty of Science, Ain Shams University0000-0002-2204-283xWilliam RizkallaDepartment of Zoology, Faculty of Science, Ain Shams UniversityHamza A. El-ShabakaDepartment of Zoology, Faculty of Science, Ain Shams UniversityAzza A. El-GanainyNational Institute of Oceanography and Fisheries, Suez branchMazaya E. Abo-MosallamDepartment of Zoology, Faculty of Science, Ain Shams UniversityJournal Article20141110The teleosts pituitary gland has a peculiar structure that shows wide variability<br /> of its morphology and cellular organization. Moreover, the pituitary gland usually<br /> displays seasonal changes during the reproductive cycle. So, the present study is<br /> designed to identify and localize the different cell types of the pituitary gland of<br /> mature male and female of Liza carinata from the Suez Bay and to study the possible<br /> variations that found during its reproductive cycle.<br /> The result revealed that the pituitary gland of L. carinata is of the platybasic<br /> type, which lacks a distinct hypophyseal stalk, and is differentiated into two main<br /> divisions, namely: the adenohypophysis and neurohypophysis. The glandular<br /> adenohypophysis consists of five main cell types, the lactotrophs, somatotrophs,<br /> gonadotrophs, thyrotrophs and melanotrophs. On the other hand, the neurohypophysis<br /> is formed of nerve fibres and contains a variable amount of neurosecretory granules.<br /> Moreover, the principal seasonal variations take place in the meso-adenohypophyseal<br /> gonadotrophs and the neurosecretory granules.https://ejabf.journals.ekb.eg/article_22871_079c4a3cdde1a99ef3bb023f9538ce53.pdfThe Egyptian Society for the Development of Fisheries and Human Health (ESDFHH)Egyptian Journal of Aquatic Biology and Fisheries1110-613119120150101Reproductive biology of the Salema, fish Sarpa salpa (Osteichthyes: Sparidae) along the eastern coast of Libya.8394224810.21608/ejabf.2015.2248ENSalah El-EtrebyMarine Science Dept., Faculty of Science, Suez Canal University, EgyptAshraf AhmedMarine Science Dept., Faculty of Science, Suez Canal University, EgyptMagdy AlwanyMarine Science Dept., Faculty of Science, Suez Canal University, EgyptRanda AliOmar Elmoktar University, LibyaJournal Article20170404In the current work, the overall ratio between males and females of Sarpa salpa<br />was 1:0.32. The first sexual maturity of males was recorded at length group (21.1-<br />24cm) by 66.6% and the female was recorded at length group (24.1-27) by 50%.<br />Ovaries of S. salpa were examined. The smallest mature female had a total body<br />length of 29 cm and 387.73 gm weight with absolute fecundity of 2,978,440 eggs. The<br />largest female had total body length of 39 cm and body weight of 918.86 gm with<br />absolute fecundity 1,685,729 eggs. Based on the results of maturity stages, gonadosomatic<br />indices (G.S.I) and ova diameters, the study showed clearly that spawning<br />season of S. salpa in the Libyan coast of the Mediterranean waters extends from<br />October to December.https://ejabf.journals.ekb.eg/article_2248_0fdb08bb59903c065050c79b68ec65da.pdf