Now showing items 1-20 of 36809

    • Effets du salage, de la fermentation et du séchage sur la qualité biochimique et microbiologique des hybrides de poisson-chat (Clarias anguillaris x Clarias gariepinus) en milieu d’élevage au Sénégal

      DIOUF, Abdoulaye; SAGNE, Mariama; DIAGO, Masse; LOUM, Abdoulaye; FALL, Jean; SENE, Woly; DIOUF, Malick; PELEBE, Rodrigue Orobiyi Edéya; NDONG, Diegane; Jatta, Saloum; et al. (2020)
      Science de la vie, de la terre et agronomie Revue RAMRes
      L’objectif de la présente étude est d’appliquer une méthode de fermentation sur des hybrides de poisson-chats (Clarias anguilaris x C. gariepinus) en élevage en vue de présenter aux consommateurs un produit de meilleure valeur ajoutée. Les expériences ont été réalisées au niveau de la serre aquacole de l’Institut Universitaire des Pêches et Aquaculture (IUPA). Un échantillon de 30 individus correspondant à 15,76 kg a été pris et réparti en trois lots de 5kg en moyenne. Les deux premiers lots ont été utilisés pour évaluer le rendement et caractériser le poisson-chat salé, fermenté et séché. Le troisième lot est utilisé pour les besoins des analyses physico-chimiques, biochimiques et microbiologiques tant sur les individus à l’état frais que sur les individus à l’état salé, fermenté et séché. Les analyses physico-chimiques ont concerné le pH, l’ammoniaque et l’Azote Basique Volatil Total (ABVT). Les analyses biochimiques ont concerné les teneurs en matières sèches, en matières grasses, en cendres et en protéines brutes. Les analyses microbiologiques ont été effectuées dans le but de dénombrer ou rechercher les germes tels que la Flore Mésophile Aérobie Totale (FMAT), les coliformes fécaux et totaux, les staphylocoques, les salmonelles. Les résultats ont montré que tous les germes recherchés à l’exception de la FMAT étaient bien dans les normes établies par l’Association de Normalisation Française (AFNOR). Cette méthode de transformation améliorée peut servir de guide pour les acteurs de la filière du poisson-chat. En perspective, cette étude pourrait être étendue à d’autres espèces d’élevage.
    • The experience of commercial rearing of the North-Caspian and Baikal sturgeons in the Baltic conditions

      Shurin, A.T.; Kairov, E.A.; Kostrichkina, E.M.; Kostromina, E.E. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1967)
      The methods of rearing of young North-Caspian (Acipenser gueldenstaedti Brandt) and Baikal (Acipenser baeri stenorrhynchus natio baicalensis A. Nikolski) sturgeons in the fish hatchery "Karli" (Latvia) are described. Data on the temperature regime of water during the rearing and on the changes in the weight and length of fish are reported. The feeding regime, ration and the technique of the artificial feeding are discussed. The results of the study showed that rearing of 5-8-gram young North-Caspian and Baikal sturgeons at high densities is possible on the feed mixture KRT-6 and stuffed spleen.
    • The biological background of the introduction of the North-Caspian and Baikal sturgeons into the Gulf of Riga

      Shurin, A.T.; Kairov, E.A.; Kostrichkina, E.M. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1967)
      The biological characters of the North-Caspian sturgeon (Acipenser gueldenstaedti Brandt) and the Baikal sturgeon (Acipenser baeri stenorrhynchus natio baikalensis A. Nikolsky) as the introduction subjects, are given. The suitability of the introduction of the North-Caspian sturgeon into the Gulf of Riga (Baltic Sea) is analysed. The Gulf of Riga as the recipient water body and the native areas of the species - the Caspian Sea and Lake Baikal are characterized. The transition from the experimental stage of the introduction work to the practical introduction of the sturgeons of the Volga-Caspian and Baikal basins into the Gulf of Riga is suggested.
    • The smoltification conditions of salmon, the abundance of smolts and the dynamics of their descent in the Salaca River

      Mitans, A.P. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1967)
      The results of the investigations on the smoltification conditions of salmon Salmo salar and sea trout Salmo trutta and the dynamics of their natural descent to the Baltic sea are described. Also, some smolt's features were studied. Applying the method of tagging and recaptures, the total salmon stock at the age of 1-4 years in the Salaca River (Latvia) was estimated at about 8500 specimen in 1964 and 9600 individuals in 1965. Both in 1964 and 1965 the 2-year-old fish were in majority. The increase in their number in 1965 can be explained with better feeding conditions in the season before the descent to the sea, as well as with favourable smoltification and migration conditions.
    • Some regularities in the dynamics of the Baltic sea waters

      Antonov, A.E.; Lishev, M.N.; Lablaika, I.A. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1967)
    • Socio-economic dimension of the octopus "Octopus vulgaris" in the context of fisheries management of both small-scale and industrial fisheries in Senegal

      Diedhiou, Idrissa; Deme, Moustapha; Fall, Massal; Thiam, Ndiaga; Yang, Zhengyong; Ndour, Mansor; Thiaw, Modou; Li, Sheng; Institut Sénégalais de Recherches Agricoles; International Shari'ah Research Academy for Islamic Finance; et al. (2021-05)
      Octopus vulgaris is fished by both small-scale and industrial fleets and has great social and economic value. Octopuses are fished in intertidal and subtidal areas using various fishing gear, with trawling used by industrial fleets and hand jigs, pots, traps, and trammel nets used by small-scale fleets. Over the years, the octopus has consistently been one of the most important commercial cephalopod resources in Senegal. Given the high economic value of octopus in Senegal, this paper discusses octopus management, as well as the industry's direct impacts on the biological traits of octopus. Survey data reveals that there are some differences in the octopus management preferences within Mbour; however, in general, fishers support biological rest and the use of oc- topus spawning pots. This study examines the socioeconomic importance of octopus and their management by scientifically analyzing the octopus fishery in Senegal. Octopuses have a short life span (12–14 months), grow rapidly, and have high natural mortality due to its sensitivity to environmental conditions. Therefore, the abundance index decreased from 13.7 kg per days at sea in 1999 to 3.3 kg per days at sea in 2016 due to seasonal fluctuations. Meanwhile, landing volumes notably increased from 2980 t in 1997 to 5932 t in 2016. Octopuses are typically destined for the European and Asian markets, with an export volume of 4886 t and gross revenue of US$26 million in 2016. However, this species is fully exploited, demonstrating the need for increased in- volvement of fishers in the management decision-making process.
    • Brief description of changes in the hydrological and hydrochemical conditions of the Baltic Sea over the past twenty years

      Antonov, A.E. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1967)
    • The ways for increasing of fish productivity of the Gulf of Riga

      Tanasijchuk, V.S.; Shurin, A.T.; Gaumiga, R.Ya.; Kairov, E.A.; Kostrichkina, E.M.; Trauberga, E.F. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1966)
      The aim of the measures for increasing the abundance of food-fish in the Gulf of Riga (Baltic Sea) and for amelioration of exploitation of their food reserves should be a reduction of the tension in the food base of the plankton-eating fish and an increase in the abundance of benthos-eating species. It is beneficial to suppress the abundance of planktivorous stickleback and gobies. Also, it is important to: (1) increase (by artificial reproduction) the abundance of valuable species of local ichthyofauna - vimba bream, pike-perch and whitefish; (2) improve the conditions of natural reproduction of migratory cyprinids by ameliration of their natural spawning grounds and creation of artificial spawning places in the lower reaches of rivers, first of all in the Daugava River; (3) plant young rainbow trout (it has high growth rate in brackish water) for fattening into the Gulf of Riga; (4) acclimatize valuable commercial fish species from other water bodies. As a result of the measures listed the share of food reserves utilized by valuable fish species in the Gulf of Riga would increase and the commercial productivity of the gulf would improve.
    • The ways of increasing of productivity of fish ponds in Latvia

      Okhryamkina, N.P. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne", 1966)
      The basic means to achieve an increase in the fish production in ponds in Latvia are: 1) the selection work; 2) fertilization of the ponds; 3) increasing of productivity of the feeding ponds; 4) application of herbicides in the amelioration of fish ponds; 5) fighting against fish diseases; 6) increasing of productivity of lakes after their treatment with polychloropinene.
    • The state of stocks of the Baltic herring in the Gulf of Riga and the perspectives of its use for the period 1965-1967

      Lishev, M.N. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva. "Zvaigzne", 1966)
      The stock dynamics of the spring spawning herring Clupea harengus membras is considered. The impact of the following factors on the state and size of herring stocks in the Gulf of Riga and the Northeastern Baltic are analysed: (1) the spawning success and living conditions of larvae of spring spawning herring in the Gulf of Riga; (2) the impact of cod Gadus morhua on the herring stock, as small (young) herring is the main prey for cod in the Eastern Baltic; (3) the impact of fishery on the herring stock, especially on the spawning stock. The efficiency of measures for conservation and regulation of exploitation of the herring stock in the Gulf of Riga is estimated. The forecast on the size and condition of the spring spawning herring for the years 1965-1967 is presented.
    • On preservation and fishery for valuable fish stocks in connection with the regulation of the Daugava River

      Malikova, E.M. (Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva. "Zvaigzne", 1966)
      The possibilities for compensation of the loss caused for fishery by the construction of the hydroelectric power station on the Daugava River are discussed. The problems connected with the organisation of artificial reproduction of fish in the hatcheries are considered. The complex of the measures should broaden the possibilities for fishery for valuable species - salmon Salmo salar, vimba bream Vimba vimba, pikeperch Stizostedion lucioperca, whitefish Coregonus lavaretus and bream Abramis brama.
    • La faune associée aux moules en élevage dans le lac de Bizerte : station de Menzel Jemil, Tunisie.

      Dridi, M.S. (2000)
      Revue de l'Institut National Agronomique de Tunisie
    • Périodes de forte production, prise par unité d'effort et déplacements possibles de l'allache et de la sardine en Tunisie

      Gaamour, Adel; Missaoui, Hechmi; Elabed, Amor (2002)
      Revue de l'Institut National Agronomique de Tunisie
    • Rapport statistique annuel des exportation de produits de la pêche année 2022

      Ministère des Pêches, des Infrastructures Maritimes et Portuaires, Direction des Industries de Transformation de la Pêche (DITP) (Direction des Industries de Transformation de la Pêche, 2022)
      La Direction des Industries de Transformation de la Pêche est chargée de la gestion des agréments techniques et sanitaires, de l’inspection, du contrôle de la qualité et de la certification sanitaire des produits de la pêche et de l’aquaculture exportés ou importés. La méthodologie d’élaboration du présent rapport statistique sur les exportations de produits halieutiques, de la Direction des Industries de Transformation de la Pêche, est présentée de manière à le rendre capable de répondre aux différentes sollicitations des administrations, des institutions régionales et internationales, des entreprises et organisations non gouvernementales, des chercheurs et du public. Les unités de traitement des produits de la pêche et les navires agrées à l’exportation soumettent à l’Autorité compétente de la DITP une demande de certification en vue de l’établissement et de la délivrance des certificats d’origine et de salubrité et des certificats sanitaires. L’outil de collecte est la demande de certification des produits de l’industriel. Toutes les informations y afférentes sont communiquées par les exportateurs eux-mêmes. Les demandes de certification sont saisies dans la base de données (archivage électronique). Le traitement est effectué par des requêtes avec le logiciel Crystal Reports et exportées vers Excel. L’accent est mis sur les renseignements : (i) des indicateurs relatifs aux exportations vers les continents, les quantités, les valeurs commerciales, les types de traitement et de transformation. (ii) des indicateurs relatifs aux réexportations des produits de la pêche (origine étrangère) et aux importations certifiées au Port et à l’aéroport. (iii) des indicateurs relatifs à la transformation et la valorisation des produits de pêche du document de Plan Sénégal Emergent (PSE) et l’Agence nationale de la Statistique et de la démographie. L’analyse des évolutions des exportations de produits halieutiques est illustrée par des graphiques, ainsi que des comparaisons faites par rapport à la précédente période. Enfin un rappel des définitions des différents concepts utilisés au niveau de l’industrie halieutique s’avère utile pour les besoins des utilisateurs.
    • Flux de matière à l'interface eau sédiment d'un élevage semi intensif de bar (Dicentrarchus labrax) en marais

      Djemali, I.; Hussenot, J.; Ben Romdhane, Mohamed Salah (2001)
      Revue de l'Institut National Agronomique de Tunisie
    • Guía para el control de calidad de datos de temperatura y salinidad obtenidos en cruceros oceanográficos regionales. Version 2.

      Grupo de Trabajo Especializado de Base de Datos (GTE-BD) de los Cruceros Regionales (Comisión Permanente del Pacífico Sur (CPPS), 2023)
      La presente publicación constituye un producto del Grupo de Trabajo Especializado de Base de Datos (GTE-BD) de los cruceros regionales perteneciente a la Comisión Permanente del Pacífico Sur (CPPS), en el cual participaron instituciones de Chile, Colombia, Ecuador y Perú. La guía establece una metodología para el control de calidad de datos de salinidad y temperatura de la columna de agua, obtenidos mediante perfiladores CTD en los cruceros oceanográficos asociados al programa para el Estudio Regional del Fenómeno El Niño (ERFEN) de la CPPS. Las pruebas de calidad propuestas conducen a la asignación de banderas de calidad recomendadas por el programa internacional IODE. Los datos calificados harán parte de la Base de Datos Regional para los diferentes usuarios. [Note: Version 1, 2022 held at https://aquadocs.org/handle/1834/42047]
    • Evolution et impact des peuplements phytoplanctoniques dans un milieu d'exploitation aquacole : cas de la mer de Bou Grara

      Kefi, Ons; Romdhane, Mohamed Salah (1993)
      Revue de l'INAT - Institut National Agronomique de Tunisie
      Le phénomène des eaux colorées constitue un phénomène pas toujours facilement explicable, mais très spectaculaire. Il permet de mettre en évidence la fragilité de certains écosystèmes, en particulier celui de la mer de Bou Grara, dans le Sud Tunisien. Le phytoplancton de cette mer est constitué à 98% de diatomées et de dinoflagellés présentant respectivement 60 et 24 espèces. Cette faible diversité spécifique résulte d'une importante eutrophisation exerçant un stress sur ces populations phytoplanctoniques. Des phénomènes d'eaux rouges à Gyrodinium aureolum ont été observés : des densités de 800000 cellules/l (août 1991) sont toxiques pour de nombreuses variétés d'animaux marins (Guelorget, 1991), alors qu'il semble que les concentrations de 280000 cellules/l (juillet-août 1992) ne le sont pas (Kéfi, 1993).
    • Relación de Acanthuridae y Scaridae con factores bióticos y abióticos en el occidente de Cuba

      Macías-Flores, Víctor; Cabrera-Guerra, Delmis; Cobián-Rojas, Dorka; Chevalier-Monteagudo, Pedro P.; Alfonso-Sánchez, Yusimí; Corrada-Wong, Raúl I. (2024)
      Revista de Investigaciones Marinas
      Acanthuridae y Scaridae son familias de peces herbívoros que constituyen los principales controladores de macroalgas en arrecifes coralinos. Sobre su distribución y abundancia inciden factores bióticos y abióticos, naturales u originados por el hombre. El objetivo de esta investigación fue analizar la relación de la densidad y biomasa de Acanthuridae y Scaridae con variables bióticas y abióticas en arrecifes con diferente nivel de protección del occidente de Cuba. Para esto, se usaron comparaciones múltiples de media por rangos y pruebas de correlaciones por rangos de Spearman en tres localidades muestreadas entre 2014 y 2017: Municipio Playa (La Habana), Bahía de Cochinos (Matanzas) y María la Gorda (Pinar del Río), las dos últimas ubicadas en Áreas Marinas Protegidas. Las Áreas Marinas Protegidas analizadas mostraron los indicadores más satisfactorios de Scaridae, que disminuyeron en las localidades con impacto antrópico. La contaminación y la presión de pesca en La Habana, mantenida por años, parecen ser las causas principales de la ausencia de adultos de Scaridae. La mayor densidad y biomasa de peces carnívoros (familia Lutjanidae) pudieran ser factores limitantes para la familia Acanthuridae, la cual exhibió mayor densidad y biomasa en sitios con mayor disponibilidad de alimento (macroalgas de los géneros Sargassum, Amphiroa y Galaxaura), menor complejidad topográfica y mayor antropización.
    • Development of the formulation and technology of a new fish culinary product "Cream cheese fish from blue catfish" enriched with iodine of kelp of the White Sea

      Novozhilova, E.A.; Shokina, Y. V.; Reshetnik, E.I.; Zakharova, L.M.; Pakusina, A.P.; Pashina, L.L.; Shkolnikov, P.N.; Tikhonova, P.А. (2024)
      Vestnik of MSTU
      Expanding the range of products based on the rational use of available fish resources is a current direction for the development of the food industry of the Russian Federation. Blue catfish, a little-used fishery item in the Northern Basin, was chosen as a raw material for the development of a fish culinary paste product. Blue catfish meat is significantly watered (up to 93 % of the total mass), as a result there are currently no technologies for deep processing of fish for food purposes. During the research, the technology of a new fish culinary product "Fish cream cheese from blue catfish, enriched with iodine from White Sea kelp" has been proposed in an assortment, and recipes have been developed, optimized in the MatLab program. The amino acid composition of blue catfish meat as well as indicators of the nutritional value of new products have been considered. The energy value of 100 g of product varies from 120 to 150 kcal, the mass fraction of protein is 8.5–11 %; fat – 9–13 %; carbohydrates – 2–2.5 %. The iodine content in a unit of consumer packaging of the product "Cream cheese fish from blue catfish with pickled seaweed" was experimentally established to be 340 mcg per 100 g; a 44 g serving of this product contains 100 % of the recommended daily intake of the micronutrient (150 mcg). The developed product "Cream cheese fish from blue catfish with pickled seaweed" can be classified as "enriched with iodine" when the amount of its daily consumption (25 g) is indicated on the consumer packaging.
    • Assessing the effectiveness of local organic materials as sorbents for oil spill response in Arctic waters

      Vasileva, Zh.V.; Trishina, A.S. (2024)
      Vestnik of MSTU
      The paper presents the results of a comparative assessment of the sorption characteristics of regional natural raw materials of organic origin: sphagnum moss (Sphаgnum palustre L.), fucus algae (Fucus vesiclousus), a composite based on them and peat in comparison with the synthetic sorbent OilSorb used in the practice of emergency rescue units to eliminate accidental oil spills. Experimental data have been obtained on potential pollutants in the Barents Sea (oil ARCO and diesel fuel) and the water capacity of sorbents for standard conditions at temperatures of 21–23 °C according to GOST 33627-2015 and in the temperature range of 10–12 °C typical for the summer period on the Kola Peninsula. The sorption characteristics of the materials under study have been evaluated in the "sea water – petroleum product" system, which simulates a real oil spill in the marine area. Tests in a model system simulating real conditions demonstrate significant changes in the efficiency of using sorption materials shown by them under standard conditions. The study has established the dynamics of the distribution of sorbed oil products and water in the materials under consideration, as well as residual oil products in the water of the "sea water – ARCO oil" and "sea water – diesel fuel" systems at different exposure times. During an exposure time of 30, 60, 90 minutes under the conditions of a system simulating a real oil spill in the water area, the material based on sphagnum moss has the most effective and time-stable indicators of sorption of oil products.