Seasonality and geographical occurrence of West Nile fever and distribution of Asian tiger mosquito

The importance and risk of emerging mosquito borne diseases is going to increase in the European temperate areas due to climate change. The present and upcoming climates of Transdanubia seem to be suitable for the main vector of Chikungunya virus, the Asian tiger mosquito, Aedes albopictus Skuse (syn. Stegomyia albopicta). West Nile fever is recently endemic in Hungary. We used climate envelope modeling to predict the recent and future potential distribution/occurrence areas of the vector and the disease. We found that climate can be sufficient to explain the recently observed area of A. albopictus, while in the case of West Nile fever, the migration routes of reservoir birds, the run of the floodplains, and the position of lakes are also important determinants of the observed occurrence.

Blue tilapia, Rookery Branch, Shark River

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. This image is made available for non-commercial or educational use only.

Nutrigenómica de la tilapia, ("Oreochromis niloticus") alimentada con diferentes fuentes de ácidos grasos

El pescado es uno de los productos alimenticios básicos más comercializados en el mundo y desempeña un papel importante en la seguridad alimentaria y nutritiva, por ser una fuente de ácidos grasos omega 3 de cadena larga (EPA y DHA). El creciente interés por esta fuente de ácidos grasos ha incrementado su precio y, con ello, los costos de producción en la acuicultura. Todo esto ha llevado a la búsqueda de nuevas fuentes alternativas de ácidos grasos omega 3 de cadena larga para reemplazarlos. El objetivo de esta tesis fue investigar los efectos producidos en el metabolismo de los ácidos grasos y en los procesos de estrés en la Tilapia del Nilo (Oreochromis niloticus), al sustituir el aceite de pescado (fuente de ácidos grasos omega-3 de cadena larga) de su dieta por aceites vegetales (aceite de lino, aceite de girasol y aceite de girasol alto-oleico). Utilizando muestras de cerebro, músculo e hígado, se evaluaron los perfiles de expresión génica por Differential Display y la expresión relativa de genes candidatos mediante RT-PCR cuantitativa. Los resultados mostraron que las dietas basadas en aceites vegetales produjeron un aumento significativo en la expresión de genes que participan en la elongación y desaturación de los ácidos grasos (que permiten la conversión de ácidos grasos esenciales linoleico y linolénico en PUFA de cadena larga: AA, EPA y DHA) y una disminución en la expresión de enzimas que se activan en situaciones de estrés por osmorregulación, choque térmico y respuesta inmune. Estos resultados aportan una prueba más de que es posible sustituir el aceite de pescado por aceites vegetales en la dieta de Tilapia del Nilo, sin generar efectos negativos en el bienestar animal...

An Exploration of Fairness in International Law through the Blue Nile and GERD

Peer reviewed

How has the Grand Ethiopian Renaissance Dam changed the legal, political, economic and scientific dynamics within the Nile Basin? : Editors’ Introduction

Peer reviewed

Spotted tilapia (Tilapia mariae)

http://digitalcommons.fiu.edu/fce_lter_photos/1286/thumbnail.jpg

Análisis y evaluación financiera del sistema policultivo de bocachico y tilapia roja en los departamentos del Atlántico y Magdalena

En este texto investigativo se realiza una avaluación financiera del proyecto Sistema Policultivo Bocachico – Tilapia Roja. Para llevar a cabo la investigación radica que en el momento en que se realizó el primer prototipo del Policultivo, no se tuvieron en cuenta aspectos de carácter financiero; además durante el proceso de estudio hemos aprendido elementos que ayudarían a mejorar el análisis financiero y económico del proyecto Policultivo. Con el estudio, los piscicultores e inversionistas dispondrán de unas herramientas calificadas y cualificadas que les permitan no sólo saber y estudiar el costo del montaje técnico de un policultivo, nociones de la piscicultura y cultivo de especies, sino, especialmente, conocer a través del uso de la metodología investigativa de la evaluación de proyectos, las fuentes más convenientes para el financiamiento, el potencial del negocio, un sostenido estudio de mercado y la generación de valor que representa el esfuerzo económico. Y por último distinguir el aporte eficaz que genera el proyecto en materia de desarrollo local o regional al contribuir con la generación de empleo, bienestar y al satisfacer ciertas necesidades sociales. Se pudo determinar que la producción y comercialización de Bocachico y Tilapia Roja mediante el Sistema Policultivos es factible, ya que mejora considerablemente los rendimientos de producción por unidad de área, y se aprovechan de la mejor manera los recursos disponibles. En el análisis se detectó que existe un gran potencial de demanda y de mercado, eficiente uso de los recursos financieros, técnicos, administrativos, legal, humanos, físicos y de infraestructura acorde con las necesidades del proyecto; y con una evaluación financiera que demuestra que el proyecto Sistema Policultivos es viable, rentable y se justifica realizar la inversión para desarrollarlo.

The past, present and projected scenarios in the Lake Albert and Albert Nile fisheries: implications for sustainable management

Lake Albert is one of the largest lakes in Uganda that still supports a multi-species fishery which as a result of variable adult sizes of the species, causes management challenges especially in relation to gear mesh size enforcement. Prior to the 1980s, commercial species were 17 large sized fishes especially Citharinus citharinus, Distichodus niloticus and Lates spp. that were confimed to inshore habitats of the lake and were thus rapidly over fished. Frame and catch assessment surveys conducted in this study revealed a >80% dominance of small size fish species (Neobola bredoi and Brycinus nurse) and a 40 -60% decrease in the contribution of the large commercial species. Sustainability of small size fish species is uncertain due to seasonal fluctuations and low beach value. At about 150,000 tons of fish recorded from Lake Albert and Albert Nile, the beach value was estimated at 55.3 million USD. Despite the noted decline in catches of the large sized fishes their contribution was more than 50% of total beach value. Therefore, management measures should couple value addition for the small sized species and maintain effort regulation targeting recovery of the large previously important commercial species.

Comercialización de productos de tilapia en la ciudad de Bogotá

Tesis (Maestria en Administración de Empresas ).--Universidad de La Salle. Facultad de Ciencas Administrativas y Contables. Maestria en Administración de Empresas, 2014

Fisheries Department Annual Report 1969

During the year 1969, the fishing industry maintained a rate of increase that had been witnessed in the three previous years. The total catch landed was estimated at 125300 metric tons, valued at shs 130,500,000/-at the lakeside,and about shs 260,000,000/-in the retail market. This was an increase of 16,900 metric tons over the 1968 figure. The largest increases again came from the Lake Kyoga area, where the Nile Perch and the introduced Tilapia species are still expanding. Large numbers of fishermen from other regions (i.e. from Lake Victoria) moved to Lake Kyoga where catches were high and remunerative. This intensified fishing on this lake, resulting in the high figure of catches recorded. As in the previous year, there was a marked increase in the use of large-mesh gill-nets for catching Nile Perch and Tilapia. Individual Tilapia nilotica of up to 5 kg were quite common, and Nile Perch weighing over 50 kg were also regularly taken. The marketing and distribution side of the industry was as active as ever: 87 people took out specific licences, and 640 fishmongers were licensed by different urban authorities. Elsewhere in the Districts, 7,950 fishmongers were licensed. Host of the fish landed was consumed within Uganda and exports accounted for dnly a very small fraction of the market, mainly composed of frozen fiilets to Kenyai and salted fish to the Republic of the Congo. Kampala market was the most important one, serving also as a central market from where fishmongers bought fish for distribution to rural areas.

Annual Report of the Game Department for the year ended 31st December, 1947

) General (2) Legislation (3) Nets (4) Imports and Exports of Dried Fish (B) Economic:- (I) Lake Victoria (2) Lake Albert (including the Albert Nile (3) Lake Edward and Associated Fisheries (4) Lake Kyoga (5) Minor Lakes, Dams and the Victoria Nile (6) Introductions (7) Fish Transfers (8) Crocodiles:- (C) Angling Trout Nile Perch Barbel Tilapia Variabilis

Annual Report of the Game Department for the year ended 31st December, 1948

Fisheries section of the annual report covers the following A. ADMINISTRATION (1) General, (2) Legislation, (3) Nets (4) Imports and Exports of Dried Fish, (B) ECONOMIC :( 1) Lake Victoria, (2) Lake Albert (including the Albert Nile), (3) Lake Edward and Associated Fisheries, (4) Report by Fish Culturist, (5) Lake Kyoga, (6) Minor Lakes and the Victoria Nile, (7) Dams,(8) Introductions,(9) Fish Transfers (10) Crocodiles:(i) Control,(ii) Industry, (iii) General (ll) General Notes, (C) ANGLING:Trout, Nile Perch Barbei, Tilapia variabilis.