Johann Heinrich von Thünen: Leben und Werk des Namenspatrons des neuen Bundesforschungsinstituts für Ländliche Räume, Wald und Fischerei

A new concept for resource oriented federal research within the competence of the German Ministry of Food, Agriculture and Consumer Protection was implemented in 2008. The Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries is one of 4 newly established large scale federal research institutions. It comprises the former Federal Research Centre for Fisheries, the Federal Research Centre for Forestry and Forest Products and large parts of the Federal Agricultural Research Centre. The institute is named after Johann Heinrich von Thünen, a famous national economist and social reformer of the 19th century. He developed the first serious treatment of spatial economics (the so-called Thünen rings) and the basics of the theory of the natural pay.

Investment in the training of technologists for commercial aquaculture

The protein shortage in Nigeria is noted and the role of aquaculture (=fish farming) as a complement in increasing the dwindling food supply is registered. In addition, the manpower shortage especially in the technology cadre is noted and attributed to the lack of co-ordination and standard curricula especially in aquaculture. An inventory of tasks performed in the aquaculture industry was taken and these were classified and validated, then their final priority level was used to assess which ones were critical, important or desirable and which ones would result in disaster or not with inadequate mastery. Based on the above, recommendations are made that all critical and important tasks be included in the teaching curriculum for aquaculture in both theory and practicals: while it is advocated that all tasks listed be undertaken in fish farm operations. This will raise the competence of technologists to run the commercial aquaculture projects

Report of the Inter-American Tropical Tuna Commission for the year 1962

ENGLISH: The Inter-American Tropical Tuna Commission, pursuant to the provisions of the Convention, has the duty of collecting and interpreting factual information to facilitate maintaining the populations of tunas, and of tuna baitfishes, supporting the fisheries pursued by nationals of its Member Governments in the Eastern Pacific Ocean, at levels which will permit maximum sustainable average harvests year after year. This requires a wide variety of research into the biology, life history, ecology and population dynamics of the several species, and investigations into the effects of both natural factors and fishing activity on their abundance and on the harvests they can sustain. The research is conducted by a permanent, internationally recruited scientific staff, employed directly by the Commission, selected on the basis of professional competence by the Director of Investigations. SPANISH: La Comisión Interan1ericana del Atún Tropical, de informidad con las disposiciones de la Convención, tiene el deber de recolectar e interpretar la información que facilite el mantenimiento de las poblaciones del atún y de los peces de carnada que sirven para la pesca de este, sosteniendo las pesquerías a que se dedican los habitantes de sus Gobiernos Miembros en el Océano Pacifico Oriental, a niveles ,de abundancia que permitan un promedio máximo sostenible de cosechas ano tras ano. Esto requiere una amplia variedad de investigaciones dentro de la biología, historia natural, ecología y dinámica de las poblaciones de diversas especies, y sabre los efectos, tanto de los factores naturales como de la actividad pesquera, en la abundancia de las mismas y en el rendimiento que puedan dar. La investigación es conducida por un grupo científico permanente, cuyos miembros son reclutados internacionalmente empleados directamente por la Comisión, una vez que han sido seleccionados sobre la base de su competencia profesional, por el Director de Investigaciones. (PDF contains 149 pages.)

The effect of organotin and copper sulfate on the late development and presettlement behavior of the hard clam Mercenaria mercenaria

The effect of organotin compounds and copper, commonly used as antifouling agent, were studied on Mercenaria mercernaria larvae. They were reared under usual hatchery conditions until they reached 190 um in diameter. The larvae were subjected to four compounds, tributylin chloride (TBT), monobutyltin chloride (MBT), trimethyltin chloride (TMT), cupric sulfate (CuSo4) plus control. Mortality was measured at 24, 48 h, and 96h. Behavioral and/or metamorphic changes were recorded in triplicate at 24-48 and 96 h. The appearance in swimming larvae of a functional foot was considered a sign of competence to set and was recorded as a "pediveliger". Swimming larvae were considered as larvae that have not yet reached their total development and they were recorded as "swimming". Larvae that did not show foot or swimming activity and were static but alive on the bottom were recorded as "bottom". TBT was found to completely inhibit swimming activity at sublethal concentrations throughout the period of observation. Copper and MBT inhibited swimming from 48 h, TMT did not inhibit swimming activity at any of the times recorded. The four compounds ranked in order of decreasing toxicity were TBT>TMT>CU>MBT.

Community visioning and action plans: Tonle Sap hub

The process of rolling out the CGIAR Research Program on Aquatic Agricultural Systems (AAS) in 12 target villages in the Tonle Sap region in Cambodia throughout 2013 involved several important tasks at different stages. This report covers one of those tasks: the Community Life Competence Process (CLCP), commonly referred to by stakeholders as "visioning". It has two main objectives: (1) to document the community visioning process, including the development of a community action plan and NGO work plan to monitor progress; and (2) to document village and network profiles of key community stakeholders at the village level.