Now showing items 1-20 of 36201

    • Les observateurs scientifiques des pêches.

      Ayari Kliti, Rakia (Institut national des sciences et technologies de la mer, 2022)
      Ce rapport de stage résume les principales techniques évoquées lors d’une formation à Alicante à bord du navire INTERMARES A-41 et reprend la majorité des cas d’études présentés lors des cours spécialisés et des séances pratiques par des experts reconnus en la matière. Le nom de chaque expert (voir annexe) sera donné devant chaque thème qu’il a dirigé. Le stage de formation sur l’observation scientifique à bord a été organisé afin de fournir une vision globale sur ce sujet pour les instituts de recherche, les administrations et le secteur de la pêche. L’objectif de ce rapport est de communiquer le maximum de savoir acquis, lors de la participation à cette formation, sur les techniques d’observations scientifiques de la pêche et ceci à ceux qui s’intéressent au domaine de la pêche et surtout ceux qui sont en relation directe avec la gestion durable de la pêche en Tunisie. Ce rapport constitue un bon guide pour la formation des professionnels de différentes disciplines souhaitant participer à des campagnes de suivi des pêches en tant qu’observateurs scientifiques. L’intérêt principal de ce rapport est donc l’aide des observateurs scientifiques de la pêche en Tunisie et aussi ceux qui souhaitent entamer cette expérience à réaliser tous les objectifs attendus par cette formation.
    • OceanTeacher Global Academy brochure.

      Intergovernmental Oceanographic Commission (OceanTeacher Global Academy, 2022)
      Delivering IOC capacity development for the ocean we need for the future we want
    • Scientific, Technical and Economic Committee for Fisheries (STECF) – Stock Assessments: demersal stocks in the western Mediterranean Sea. (Version 1.2) (STECF-22-09).

      Simmonds, E.J.; Mannini, Alessandro; Kupschus, Sven; Billet, Norbert; Bitetto, Isabella; Certain, Gregoire; Couve, Pablo; Farré, Marc; García, Encarni; Garriga Panisello, Mariona; et al. (Publications Office of the European Union, 2022-11-24)
      Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines This report documents the outcomes of STECF Expert Working Group 22-09: 2022 stock assessments of demersal stocks in the western Mediterranean Sea from the meeting held remotely from 5th to 11th September 2022. A total of 20 fish stocks considered and 18 were fully evaluated. Two stocks had prior advice from 2021 with catch advice for 2022 and 2023, and this is reiterated here. The EWG reports age based assessments, target Fs, with short term forecasts for 15 of the remaining 18 stocks, of these 15, 12 were also analysed for biomass reference points. Catch advice for three stocks was based on ICES category three evaluations of biomass indices. The content of the report gives the STECF terms of reference; the basis of the evaluations; assessments, reference point calculations; summaries of state of stock and advised catch or F based on either the MSY approach for assessed stocks and category 3 based advice for those without assessments. The report contains the full stock assessment reports for the 15 assessments, the exploration of assessments and category 3 evaluations for the remaining three stocks. The report also contains the STECF observations and conclusions on the assessment report. These conclusions come from the STECF Plenary meeting November 2022.
    • STECF. 2021. Scientific, Technical and Economic Committee for Fisheries (STECF) – Stock assessments in the Mediterranean Sea 2021 – (Adriatic and Ionian Seas) (STECF-21-15).

      Simmonds, E.J.; Mannini, Alessandro; Bitetto, Isabella; Cikes Kec, Vanja; Daskalov, Georgi; Isajlovic, Igor; Kupschus, Sven; Mantopoulou, Danai; Murenu, Matteo; Orio, Alessandro; et al. (Publications Office of the European Union,, 2021-12-22)
      Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. This report is from STECF Expert Working Group 21-15: 2021 stock assessments of demersal stocks in Adriatic, Ionian and Aegean Seas from the meeting held remotely from 18th to 22th October 2021. A total of 9 fish stocks were evaluated. One stock had prior advice from 2020 for 2021 and 2022, and this is reiterated here. Index advice for 2022 and 2023 is provide for one other stock. The EWG reports age based assessments and short term forecasts for 5 of the remaining 7 stocks and surplus production assessments for two stocks. The content of the report gives the STECF terms of reference, the basis of the evaluations and advice, summaries of state of stock and advised based on either the MSY approach for assessed stocks or the precautionary approach for category 3 based advice. The report contains the full stock assessment reports for the 7 assessments, the exploration of assessments and category 3 evaluations for the remaining five stocks. The report also contains the STECF observations and conclusions on the assessment report. These conclusions come from the STECF Plenary meeting November 2021.
    • Impact des changements environnementaux sur les ressources marines en Algérie.

      Bachouche, Samir (2018)
      CNRDPA infos: Le bulletin d'information du CNRDPA
      L'ampleur des impacts résultants des changements environnementaux (climatique ou globale) du milieu marin est difficile à prévoir. Les effets pourraient être dévastateurs dans les écosystèmes fragiles, comme le corail. De même, l’Algérie comme de nombreux pays s'appuient fortement sur les produits de mer comme source de protéines ou comme source de revenus substantielle pourrait donc être parmi les pays les plus concernés par cette problématique dans l’avenir. La base de la prise de décision efficace et l'atténuation des effets des changements climatiques sur les sources marines sont des données scientifiques solides .Dans le but de pouvoir fournir des données de haute qualité aux décideurs afin de formuler des actions de gestion appropriées au niveau national et international, le CNRDPA anticipe à travers plusieurs mécanismes de coordination de collecte de données à l'échelle nationale sur les changements climatiques des milieux marins et ses impacts écologiques. L'importance de l'obtention de ces mesures a été approuvée par de nombreux organismes gouvernementaux et non gouvernementaux qui ont récemment aidé la communauté scientifique à développer un réseau d'observation sur le milieu marin.
    • Heavy Metal Bioaccumulation in Brown Algae Cystoseira compressa in Algerian Coasts, Mediterranean Sea.

      Benfares, Redhouane; Seridi, Halima; Belkacem, Yasmina; Inal, Ahmed (2017)
      Info CNRDPA: Le Bulletin du Centre National de Recherche et de Développement de la Pêche et de l'Aquaculture
      This study was undertaken to investigate and assess trace metal (Cd, Pb, Cr, and Hg) concentrations in the Cystoseira compressa algae from the coastal city of Bou Ismaïl (Algeria). Spatial and temporal variations in the concentrations of these heavy metals were studied in the following three sampling sites: site 1 and site 2 were major wastewater discharge zones and site 3 was located close to areas with high industrial activity. Seawater, sediments and algae in the wastewater from the three sites were submitted to physico-chemical analyses to determine the concentrations of heavy metals and the level of pollution in the region. The results revealed that site 1 (designed as desalination) and site 2 (designed as industrial waste) were non-compliant, which was attributed to heavy loads of heavy metals and wastewater discharged by industrial activity and absence of regular treatment. Site 3 (designed as cove koali), on the other hand, was noted to represent a reference site. Overall, the results provided evidence for the heavy metal bioaccumulation of algae from the genus Cystoseira and their efficiency for use as biomarkers of pollution in coastal areas.
    • Etude zootechnique de l’efficacité d’un aliment composé formulé localement (entre le CNRDPA et l’ONAB), sur la croissance du Tilapia du Nil 'Oreochromis niloticus'.

      Alliouche, Fayza; Hamidat, Mohammed; GUERRIDA, Hada; Benrabah, Soumia; Kherrarba, Maha; Benfares, Redhouane; Centre National de Recherche et de Développement de la Pêche et de l'Aquaculture (Algérie) (2017)
      CNRDPA Infos : le Bulletin d'Information du CNRDPA
      L’objectif de cette étude est de tester l’efficacité d’un aliment composé, formulé localement, sur la biomasse d’Oreochromis niloticus, en utilisant une source de protéine végétale pour substituer la farine du poisson. Le gain du poids obtenu après 45 jours d’expérience est 11,23g, le taux de croissance spécifique est de 1,90, alors que l’indice de conversion est de 2,86. À la fin de l’expérience le taux de survie était de 81%. La stabilité de l’aliment dans l’eau est faible, pour cela nous avons proposé l’ajout d’un liant « amidon » pour assurer la stabilité de l’aliment dans l’eau et améliorer la qualité physicochimique de l’eau.
    • Etude de la reproduction de la sardine Sardina pilchardus (Walbaum, 1792) de la côte Algérienne.

      Ben Smail, Samia; Bennoui, Azeddine; Ferhani, Khadra (2019-10)
      CNRDPA Infos : le Bulletin d'Information du CNRDPA
      L'étude de la reproduction et de la fécondité de la sardine Sardina pilchardus a été réalisée au moyen d'un échantillonnage biologique des débarquements des senneurs, opérant au niveau des trois principaux ports représentants les trois régions de la côte algérienne (Béni-Saf pour la région Ouest, Bouharoun pour la région Centre et Annaba pour l’Est), de décembre 2004 à novembre 2005. 1492 individus de sardine ont été disséqués dont 630 mâles, 591 femelles et 271 sardines à sexes indéterminés. Le sex-ratio global obtenu est nettement en faveur des mâles. La période de ponte mise en évidence par le suivi mensuel du RGS a montré une ponte hivernale où la quasi-totalité des ovocytes sont émis entre janvier et février. Le développement gonadique chez les deux sexes a présenté une parfaite synchronisation. La taille à la première maturité sexuelle a été atteinte dès sa première année. Sa fécondité absolue peut atteindre jusqu’à 30000 ovocytes dont la moyenne est de l’ordre 14000 ovocytes.
    • Caractérisation et dynamique de la charge polluante véhiculée par l’oued Mazafran sur le milieu côtier.

      Zenati, Billal; Kourdali, Sidali; Inal, Ahmed; Mesbaiah, Fatima-Zohra; Meknachi, Abdellah; Belhouchet, Nassima (2018)
      CNRDPA infos: Le bulletin d'information du CNRDPA
      Une campagne de prélèvement sur le lit du cours d’eau de l’oued de Mazafran ainsi que dans la zone côtière en face a été menée durant le mois d’Août. Les résultats des paramètres hydrologiques dans le cours d’eau ont montré des températures saisonnières, des pH caractéristiques des eaux de surface, mais des faibles taux d’oxygène alarmants d’une pollution anthropique. Les valeurs de la DCO et de la DBO5 dépassent largement les seuils trouvés dans les eaux de surface. De même, l’azote et le phosphore révèlent un enrichissement excessif. Quant à la zone côtière en face de l’oued Mazafran, elle est caractérisée par des températures saisonnières (entre 21,82 et 21,14 °C), des pH d’eaux de mer (entre 8,14 et 8,19), une bonne oxygénation du milieu, en dépit des fortes concentrations de MES enregistrées (jusqu’à 111 mg/l), ce qui traduit peut-être un développement phytoplanctonique, vue les concentrations relativement élevées de la chlorophylle a rencontrées (entre 0,4 et 0,8 µg/l).Les éléments nutritifs affichent un gradient de concentration descendant côte-large pour l’ensemble, avec des faibles valeurs des nitrites et phosphates et des teneurs élevées des nitrates, résultants peut être de l’apport fluvial de l’oued Mazafran.
    • Molluscans species diversity and protein expression analysis in Lunella ‎coronate spp of family Turbinidae from the Manora Channel Karachi, ‎Pakistan‎.

      Afsar‎, Nuzhat; Naz‎, Farah; Saher‎, Noor Us; Ibrahim‎, Shafaq; Sadiq‎, Hafiza Mahzaib; Ahmed‎, Urooba; Mughal‎, Ramsha; Bint e Ahmed‎, Syeda Zainab; Jabbar, Sonia Abdul (2022-06-30)
      Pakistan Journal of Marine Sciences
      Manora rocky shore characterize as a shore having moderate to strong wave exposure, ‎zonation pattern characterize by intertidal habit, different communities of invertebrates ‎and algae bands dominated by molluscan diversity and associated fauna. The current ‎study contribute the species diversity of molluscs from the Manora rocky ledge, coast of ‎Pakistan. A total of 11 species were recorded pertaining to 9 families and 11 genera ‎including family Turbinidae: Turbo bruneus, Lunella coronata, family Cerithiidae: ‎Cerithium caeruleum, family Babyloniidae: Babylonia spirata, family Neritidae: Nerita ‎albicilla, family: Chilodontaidae Euchelus asper, family Veneridae: Circenita ‎callipyga, family Arcidae: Barbatia obliquata. Family Pectinidae, Mimachlamys ‎townsendi, family Chamidae: Chama sp, family Littorinidae and Sub family ‎Trachycardiinae V. assimile. In addition, Protein expression analysis of L. cornata was ‎also observed through Polyacrylamide gel electrophoretic. L. coronata was previously ‎reported from the coastal water of Pakistan with some morphological variation in the ‎shell shape and the results reveled that electrophoretic patterns of proteins in L. cornata ‎spp 1 and L. cornata spp2 differentiate from each as seen in morphological characters.‎
    • Benthic assemblages for ecological evaluation of Lake Borollus, Mediterranean Sea, ‎Egypt.‎

      El Komi, Mohamed Mohamed (2022-06-30)
      Pakistan Journal of Marine Sciences
      Lake Borollus is one of the largest and oldest Egyptian lakes, whereas it is located in the ‎far north of the Delta and mediates between the two branches of Rosetta and Damietta. ‎It is connected to the Mediterranean Sea through Boghaz El Borollus and to the Nile ‎through the Bermbal Canal, which was established in 1926 to feed the lake with ‎abundant quantities of Nile water and Nile fish. Central coordinates: latitude 31°30' N ‎and longitude 30°49' E with an area has decreased from 160,000 acres to 108,000 acres. ‎The present work provides an ecological study on the regional and temporal distribution ‎of benthic communities in particular along the wetlands lakes waters. Indicated that, the ‎effective sediment and water variables which significantly correlated with the distribution ‎and abundance of the identified benthos assemblages of vegetation and animal’s groups ‎include sediments structure, water quality (pH, S%, DO, BOD, temperature. Overall, 10 ‎taxa and 27 species of macroinvertebrates were identified. They were exclusively ‎associated with submerged vascular plants Potamogeton pectinatus while only 10 were ‎alive forms and the rest were represented by calcareous shells of molluscs. The benthic ‎flora and fauna were estimated in the Lake Botollus, Egypt is subjected to the influx of ‎sewage effluents, agriculture drainages and industrial wastes. Also considerable amounts ‎of drain water are constantly discharged along the southern drains. Quantitative hauls ‎were performed at the different habitats during winter and summer, 2017 covering 12 ‎sampling sites and 9 drains discharged directly to the lake which bottom sampling was ‎collected by grab sampler were selected to represent the covering the different ‎environments. The dredged area per each station was 225 cm2 per haul. Results ‎illustrated that the distribution of benthos in the estimated area is greatly affected by the ‎degree of pollution as well as the prevailing hydrological conditions. The aquatic ‎submerged vascular plants Potamogeton pectinatus appeared as the most common ‎species in the lake in addition the bottom animals appeared more- sensitive to pollution ‎than submerged vascular; thus, their lowest counts were recorded at the most sites and ‎the fauna was mainly represented by the Nematoda, Oligochaeta, Polychaeta, Insects ‎larvae, Ostracoda, Amphipoda, Barnacles, and juvenile larvae of Mollusca. Sediments in ‎some areas consist of organic materials (sludge) is composed of waste sewage and ‎agricultural and industrial and others of sandy silt (silt), calcareous shells are mainly of ‎molluscs’ and therefore it can determine some environments prevailing in the lake. ‎Results indicated for examining configuration qualitative benthic macro during the study ‎period were recorded 27 species, including 9 species of living benthic macro organisms ‎include one type of aquatic submerged vascular plants of species Potamogeton ‎pectinatus. Although higher values of taxonomic richness, the Shannon and index (H`) ‎and evenness (J`) were obtained with the water Potamogeton pectinatus habitat as well ‎as Ostracoda Sclerochilus contortus were most abundant.‎
    • Description of the first to fourth zoeal stages of Macrobrachium equidens (Dana, ‎‎1852) (Crustacea: Decapoda: Palaemonidae).‎

      Ghory, Farhana S.; Kazmi, Quddusi B.; Kazmi, M. Afzal (2022-06-30)
      Pakistan Journal of Marine Sciences
      An ovigerous female of Macrobrachium equidens (Dana, 1852) collected from near ‎shore of Sandspit back waters (Karachi, Pakistan) (Long. 66° 54’ 24”E Lat. 24° 50’ ‎‎24”N) on 19, October, 2009, and kept under the laboratory conditions. Larvae were ‎hatched out after 13 days. Zoea I to zoea III stages passed within 6 days at room ‎temperature 31°C, water temperature 29°C, in filtered seawater of a salinity of 37 ‰ and ‎pH 7.9. The Zoea IV of the same species was collected from planktonic sample of ‎Manora Channel, Karachi (Long. 66° 59’ E Lat. 24° 48’ N) on 1995. The larvae of this species are described and illustrated along with comparisons to ‎those described previously.‎
    • Morphometric relationships and meristic characteristics of Megalaspis cordyla ‎‎(Linnaeus, 1758) from the Bay of Bengal.

      Sarmin‎, Most. Shakila; Rahman, Md. Ashekur; Khatun‎, Mst. Shefaly; Sarker‎, Biplob Kumer; Rahman, Md. Ataur; Sabbir, Wasim; Asadujjaman, Md.; Samad, Md. Abdus; Habib, Kazi Ahsan (2022-06-30)
      Pakistan Journal of Marine Sciences
      Megalaspis cordyla is one of the Carangid fish species commonly found in marine areas ‎of the Sundarbans and the Bay of Bengal in Bangladesh. This study described the ‎morphometric relationships including length-weight and length-length relations (LWRs ‎and LLRs) and meristic characteristics of M. cordyla. A total of 100 individuals were ‎collected from commercial fishers’ catch in the Bay of Bengal, Bangladesh during ‎January-December 2021. For each individual, a total of fourteen various lengths were ‎measured by measuring board with 0.01 cm and body weight (BW) was taken by digital ‎balance with 0.01 g accuracy. Fin-ray numbers from all fins as well as scutes were ‎counted by a magnifying glass. Total length (TL) varied from 17.0-36.5 cm and the total ‎body weight (BW) ranged from 75.0-416.6 g. All LWRs were significantly related (p < ‎‎0.001), with r2 values ≥ 0.910. Based on r2 value (0.979), LWR by BW vs. TL (W= a × Lb) ‎was the best fitted model among 14 equations. Besides, the LLRs were also significant ‎with r2 values ≥ 0.908. According to r2 value (0.995), LLR by TL vs. FL (TL = a + b× FL) ‎was the best fitted model among 14 equations. The fin formula of M. cordyla is: first ‎dorsal, D1 I+VII; second dorsal, D2 I/14-18+6-8 finlets; pectoral, P1 20-26; pelvic, P2 I/5; ‎anal, A II+I/12-16 +5-7 finlets. This study provided knowledge on morphometric and ‎meristic features that would be very useful for species identification and stock ‎assessment of M. cordyla in the Bay of Bengal and other marine ecosystems.‎
    • Least-Squares Reverse Time Migration in Pseudodepth Domain and Its Application

      HUSSEIN MUHAMMED, HUSSEIN ABDUELHALEIM (China University of Petroleum (East China), 2022-06-30)
      The Cartesian-based least squares reverse time migration (LSRTM) aims to obtain a relatively high-resolution amplitude preserving imaging by calculating and solving the Hessian matrix. In addition, conjugate gradient algorithm is proved to be an efficient iterative method, which makes the traditional LSRTM feasible in practical data processing applications. Each iteration process of LSRTM includes two main parts; The first part is the forward simulation of wavefield, and the second part is the back propagation of wavefield. However, the calculation of these two parts takes a lot of time, and oversampling effects will occur in the calculation process. The thesis develops a smooth understanding of the LSRTM scheme in pseudodepth domain and gives information about this type of wavefield extrapolation method to achieve amplitude-preserved image with low computational costs in terms of memory and time. The underground media faced by seismic exploration usually include low velocity bodies, high steep structures and pore fracture units. When simulating the seismic wavefield in these media, in order to ensure the simulation accuracy and computational stability by finite difference methods, the grid spacing needs to be very small, which leads to the oversampling problem of the traditional finite difference forward simulation method in Cartesian coordinate system. In order to overcome this problem, the pseudo depth domain algorithm is applied to the least-squares reverse time migration to improve its computational efficiency. The problem of stabilizing this Pseudodepth wavefield arises from the introduction of the mapping function and velocity and also the vertical axis operator that converts the finite difference solution partially from time into frequency domains. Stability and convergence analysis suggests that the spatial derivatives of Riemannian axis should be approximated by a mixed Fourier pseudo-spectral and ordinary finite-difference schemes methods using a special Gaussian-like impulse function to generate the vector-matrix of the complex source term within the finite-difference operator, in addition to the mapping velocity, which is a differential form of the initial input velocity model, manifestly controls the CFL conditions of the associated Riemannian-finite difference operator. Numerical and synthetic examples indicated that this approach is more stable and efficient in extrapolating a smooth Riemannian wavefield while maintaining Claerbout’s principle for locating subsurface reflectors also choosing an appropriate sampling rate for the new vertical axis is related inversely by the maximum frequency of the impulse wavelet and directly with minimum velocity value in the given model. The LSRTM wavefield extrapolation usually uses the two-dimensional constant density acoustic wave equation, by considering the change of velocity field distribution, and converts it to the corresponding pseudodepth domain, so as to solve the oversampling problem in the true depth domain. For each point in the Cartesian coordinate system, there is a corresponding point in the pseudo depth domain. Therefore, we can interpolate and remodel the reconstructed finite difference modelled wavefield in the new coordinate system through the Cartesian-to-pseudodepth mapping function. Regardless of the applied finite difference algorithm and boundary conditions, wavefield extrapolation in pseudodepth domain can ensure high accuracy and efficiency. Through the test of synthetic and actual data, compared with the traditional LSRTM results, pseudodepth domain LSRTM shows great potentiality in amplitude preserving imaging. On the other hand, pseudodepth domain LSRTM has great advantages in computational efficiency and ensures computational accuracy.
    • Growth and Survival of Black-lip Pearl Oyster Pinctada margaritifera (Linnaeus, 1758) in Bamboo and Metal-framed Pocket Net Baskets Subjected to Cleaning and Without Cleaning Conditions

      Cueba, Francis Rey A.; Diaz, Redentor D.; Villanueva, Elmer G; Mecha, Niño Jess Mar F.; Anunciado, Sharon Rose P.; Dolorosa, Roger G.; City Agriculture Office, Puerto Princesa City, Philippines; College of Fisheries and Aquatic Sciences, Western Philippines University; Napsan National High School, Puerto Princesa City, Philippines; College of Arts and Sciences, Western Philippines University, Aborlan, Palawan, Philippines; et al. (2022)
      The Philippine Journal of Fisheries
      The farming of black-lip pearl oyster Pinctada margaritifera (Linnaeus, 1758) has been a viable industry for small and large-scale farmers in the South Pacific, but not in the Philippines, where it is monopolized by large-scale farms primarily based on the gold-lip pearl oyster Pinctada maxima. To promote the industry among small-scale players, we simplified the culture method by using bamboo slats as frame materials and compared them to the common material used in pearl oyster culture, metal rods. A total of 400 individuals seven-month-old hatchery-produced P. margaritifera were used as experimental animals, distributed in the following treatments with five replications: T1 (metal-framed pocket net basket with monthly cleaning), T2 (metal-framed pocket net basket without monthly cleaning), T3 (bamboo-framed pocket net basket with monthly cleaning), and T4 (bamboo-framed pocket net basket without monthly cleaning). Growth was fast in the first four months and slowed down after that. Two-way analysis of variance found no significant differences between the average anteroposterior shell (APS) length increments of pearl oysters between two types of frame, and between two cleaning conditions. Survival rates did not significantly differ between types of basket frame, and between cleaning conditions. Parameters of the “Typical” von Bertalanffy growth model (L∞ = 118.41 mm, K = 1.03 year-1, and t0 = 0.12) suggested that oyster would take about 23.16 months to reach 100 mm APS length, a size suitable for nucleus implantation. The life span of bamboo slats as basket frame was half of the metal frame, and the absence of cleaning has reduced the operational cost by up to 82.08%.
    • Bitácora Hidrográfica, Junio 2006

      Hasembank Rotta, Guillermo; Vegas Castañeda, Fernando; Lazo King, Eduardo; Murillo Miletich, Víctor; Tamayo Infantes, Myrian; Vivanco Cueva, Cancio; Gianella Herrera, José; Ponce de León Novoa, Juan; Behr Laca, Julio; Dirección de Hidrografía y Navegación de la Marina de Guerra del Perú (2006-06)
      Un minisatélite para el Perú: herramienta estratégica para la seguridad y el desarrollo - B.A.P. Carrasco cincuenta años de travesía: su remotorización y modernización - Los ríos amazónicos en la mira permanentes del Servicio de Hidrografía y Navegación - El Perú y la Antártida: continua labor científica y relevante cooperación internacional - NAYLAMP un gran proyecto nacional para mitigar efectos de El Niño - Avances científicos de la geodesia y su eficaz aplicación en el Perú - Líneas de base y el dominio marítimo nacional - Cartas náuticas electrónicas imprescindibles en un mundo digital - Organización Hidrográfica Internacional 85 años de contribución a la seguridad mundial de la navegación - Marinos peruano se adiestran para la Antártida - El litoral fue afectado por bravezas - El fenómeno de "El Niño" 1982-1983
    • Bitácora Hidrográfica, No. 02, Diciembre 2006

      Ferrer Banda, César; Benavides Shols, Richard; Morales M., Oscar; Laos Cruzado, Gustavo; Olcese Huerta, Daniel; Otiniano Rodríguez, Jorge; Montoro Cáceres, Hugo; Guzmán Zorrilla, Emanuel; Hasembank Rotta, Guillermo; Holguín Valdivia, Carlos; et al. (2006-12)
      Labor hidrográfica: Experiencia de los conquistadores sumado a la aplicación de la ciencia y tecnología - Equipo de alta precisión para la búsqueda de naufragios e imágenes submarinas - Cartas náuticas electrónicas, tecnología al servicio de la navegación. La corriente peruana; presencia y características. Dirección de Hidrografía y Navegación; Voz oficial de alerta de tsunamis en el Perú. Peligros marinos: Oleajes anómalos y su impacto en zonas costeras. Cartografía oceánica: Conocer el fondo del mar, un reto impostergable. Modelos numéricos: Una herramienta para el estudio de los procesos oceánicos y costeros. Los servicios hidrográficos y su rol en el siglo XXI. Geofísica marina: Disciplina para explorar riquezas subacuáticas. El Lago Titicaca y su relación con el fenómeno El Niño Labor educativa y de prevención durante visita a estaciones oceanográficas en el sur. Fotogrametría y teledetección: Fotos e imágenes satelitales para una cartografía de alta resolución
    • Scientific, Technical and Economic Committee for Fisheries (STECF) – Stock Assessments: demersal stocks in Adriatic, Ionian and Aegean Seas and straits of Sicily (STECF-22-16).

      Simmonds, Edmund John; Angelini, Silvia; Armelloni, Enrico Nicola; Barone, Giulio; Bitetto, Isabella; Costantini, Isabella; Isajlovic, Igor; Kupschus, Sven; Mannini, Alessandro; Mantopoulou Palouka, Danai; et al. (Publications Office of the European Union, 2022)
      Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. This report documents the outcomes of STECF Expert Working Group 22-16: 2022 stock assessments of demersal stocks in the Adtiat ic, Ionian and Aegean Seas from the meeting held in Rome from 17th to 23th October 2022. A total of 16 fish stocks were considered and 15 were fully evaluated. The EWG reports age based assessments, target Fs, with short term forecasts for 9 stocks of the remaining 6 stocks, four of these do not have short term forecasts as he assessments are not suitable, and one is given ICES category 3 advice. The content of the report gives the STECF terms of reference; the basis of the evaluations; assessments, summaries of state of stock and advised catch or F based on either the MSY approach for assessed stocks and category 3 based advice for those without assessments. The report contains the full stock assessment reports for the 14 assessments, the exploration of assessments and category 3 evaluations for the remaining stock. The report also contains the STECF observations and conclusions on the assessment report. These conclusions come from the STECF Plenary meeting November 2022.
    • Bitácora Hidrográfica, No. 03, Diciembre 2007.

      Otiniano Rodríguez, Jorge; Vegas Castañeda, Fernando; Pérez Medina, Roberto; Ramos Orlandino, Carmela; Tamayo Infantes, Myrian; Astete Cotrina, Jaime Andrés; Tacilla Vargas, Gilberto; Ortega Rafael, Erick; Miguel Rodríguez, Eloy; Acosta Urbina, Rosa Inés; et al. (2007)
      Calentamiento y aumento del nivel del mar en la costa peruana: Arribo de "ONDA KELVIN" oceánica asociada al fenómeno "EL NIÑO" causa anomalía - Grandes olas destructivas: Tsunamis, pueden prevenirse gracias al Sistema Internacional de Alerta del Pacífico - Sistema de Información Geográfica (SIG) Herramienta de hoy y del futuro: tecnología de suma importancia para la integración organizada de datos espaciales marinos y costeros para la toma de decisiones navales - Observado 17 de junio del 2006: oleaje anómalo de fuerte intensidad en la Bahía de Miraflores - Programa especializado "Ocean Teacher" de lineamientos internacionales: Técnicas avanzadas de manejo de información oceanográfica - Automatización de modelos numéricos a partir de productos terminados - Tsunami en Pisco: DHN envió una brigada hidrográfica de reconocimiento - Décimo crucero regional oceanográfico en el Pacífico Sudeste - Misión de estudios en buque francés "Jeanne D'Arc": Perú único país de América del Sur invitado - Control del régimen hidrológico del Río Rímac - Perspectivas de "El Niño" para 1984 - Los derroteros en el Perú - Informe de Don Miguel Grau sobre el Puerto de Salaverry - El sonar de barrido lateral - Por el corazón de Sudamérica del Amazonas al Orinoco a través de 5.000 millas náuticas - La expedición Cousteau a la Amazonía - Necesidad de monitorear condiciones atmosféricas: Influencia de la Antártida en el Perú
    • Bitácora Hidrográfica, No. 02, Diciembre 2006.

      Ferrer Banda, César; Benavides Shols, Richard; Morales M., Oscar; Laos Cruzado, Gustavo; Olcese Huerta, Daniel; Otiniano Rodríguez, Jorge; Montoro Cáceres, Hugo; Guzmán Zorrilla, Emanuel; Hasembank Rotta, Guillermo; Holguín Valdivia, Carlos; et al. (2006)
      Equipo de alta precisión para la búsqueda de naufragios e imágenes submarinas - Cartas náuticas electrónicas: tecnología al servicio de la navegación - La Corriente Peruana: Presencia y características - Dirección de Hidrografía y Navegación: Voz oficial de Alerta de Tsunamis en el Perú - Peligros marinos: Oleajes anómalos y su impacto en zonas costeras - Cartografía oceánica: conocer el fondo del mar, un reto impostergable - Modelos numéricos: Una herramienta para el estudio de los procesos oceánicos y costeros - Los servicios hidrográficos y su rol en el siglo XXI - Geofísica marina: Disciplina para explorar riquezas subacuáticas - El lago Titicaca y su relación con el fenómeno El Niño - Fotogrametría y teledetección: Fotos e imágenes satelitales para una cartografía de alta resolución - In memoriam: Señor Mario Gironda Palomino profesional y amigo ejempla