Aquaculture

Biophysical impacts of aquaculture, with consequences for biodiversity, vary with species and culture systems and include issues such as: nutrient enrichment/removal, chemicals, land use, species introductions, genetic flow to wild populations, disturbance of balance or introduction of pathogen/parasites, consumption of capture fishery resources, energy, and greenhouse gas emissions. Guiding principles, labeling schemes and various tools are needed to analyze performance and conformance.

Analysis of demersal assemblages off the north coast of Central Java, Indonesia

Trawl survey data collected by the RV Mutiara 4 in 1979 off the north coast of Central Java (Indonesia) were used to examine the composition and distribution of species assemblages in the area. Classification (TWINSPAN) and ordination (DCA) techniques commonly used in community structure analysis were utilized during the study. The results indicate the existence of “shallow” and “deep” assemblages with a boundary at around 20 - 30 m depth (varying with the monsoon season). There is some consistency in the assemblages between the seasons.

Technical guidelines for economic valuation of inland small-scale fisheries in developing countries

These “Technical Guidelines for Economic Valuation of Inland Small-scale Fisheries in Developing Countries” are one of the outputs of the project on “Food security and poverty alleviation through improved valuation and governance of river fisheries in Africa”. The guidelines draw upon research results and experience gained during the course of the project.

Sustainable utilization of inland water resources: an integrated program for research and management

In both developed and developing countries, there is increased competition for water resources, resulting in deficiencies in supply and in various forms of pollution. In developing countries, the nutritional potential of aquatic resources is very important. To realize this potential, integrated research and management for sustainable water resource use are needed. This requires a sound understanding of the structure and function of aquatic ecosystems.

Study on the species assemblages of tropical continental shelves, based on the trawl data collected by the "R.V. Dr. F. Nansen", 1975-1988

A brief account is given of a study of the species assemblages of the Western Indian Ocean, based on the trawl data collected during surveys conducted on the continental shelves in the region. The major objective is to describe thepatterns of species associations and relate them to environmental conditions. Details are given of the various computer programmes used in the study.

Padal fishing - a unique fishing method in the Ashtamudi Estuary of Kerala (south India)

Bush park fishing / padal fishing is an indigenous fishing method widely employed in the Ashtamudi estuary of Kerala (south India). An artificial reef made from twigs and leaves of trees is planted in the shallow areas of the estuary. The aim is to harvest fish that find shelter in these structures for the purpose of feeding and breeding. Though the State Department of Fisheries has banned this method of fishing in the inland waters of Kerala, 400 padals are operating in this estuary. About 300 of them are anchored in the western parts of the estuary (west Kayal).

Not by rent alone: analysing the pro-poor functions of small-scale fisheries in developing countries

The dominant view in academic and policy arenas is increasingly one in which the major contribution of capture fisheries to development should be derived from the capacity of society to maximise the economic rent of fishery resources. Drawing upon empirical experience from the South, this article highlights the potentially disastrous consequences that a universal implementation of the rent-maximisation model would have in developing countries, and argues that a more gradual approach would be preferable.

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