Catch assessment of Sardinella maderensis in the Ocean Division, Cameroon

Catch assessment estimates for the motorized and non-motorized canoes at Boa-Manga (Cameroon) were found to be 5.13 and 2.70 t/year, respectively, leading to an estimated lower limit for the production of the Ocean division (100 km coastline) of 1190 t/year. The net economic benefit for the motorized canoes is higher than that of non-motorized canoes. It appears better to modernize only the existing non-motorized craft.

Overfishing and the replacement of demersal finfish by shellfish: An example from the english channel

The worldwide depletion of major fish stocks through intensive industrial fishing is thought to have profoundly altered the trophic structure of marine ecosystems. Here we assess changes in the trophic structure of the English Channel marine ecosystem using a 90-year time-series (1920–2010) of commercial fishery landings. Our analysis was based on estimates of the mean trophic level (mTL) of annual landings and the Fishing-in-Balance index (FiB).

Mariculture development and livelihood diversification in the Philippines

This paper aims to evaluate mariculture as sustainable livelihood diversification option for coastal fishers in the Philippines and guide policy development in this direction. Mariculture in the Philippines refers to the culture of finfishes, shellfish, seaweeds and other commodities in cages, pens, stakes and rafts in marine environment. This paper evaluates the biophysical and socioeconomic contexts in which mariculture operate.

Outlook for fish to 2020: a win-win-win for oceans, fisheries and the poor?

The world has observed an unprecedented rise in production, consumption and trade of fish during last three decades. Developing countries as a whole supply nearly 75% of the fish, and represent 50% of the value of global fish trade. At a time when receipts from traditional agricultural exports have been declining, export earnings from fish seem to be paying the food imports bills in many low-income food-deficient countries.

Ocean sciences in relation to living resources

A major new international research program of importance to fisheries is likely to be adopted later this year. Ocean Sciences in Relation to Living Resources, sponsored by FAO and IOC, a proposal concerning the relationship between ocean variability and fish variability has been developed by a special group, as well as suggestions for incremental development of a broader program on the relationship of ocean science and living resources.

Length-weight relationship of some marine fish species in Reunion Island, Indian Ocean.

The length-weight relationship of 29 marine fish species form Reunion Island (SW Indian Ocean) belonging to 14 families were computed. Data from 5,340 individuals were used for this purpose. Fish were sampled using different techniques, mainly with rotenone poisoning on coral reef flats, beach seine and handlines on shallow coastal bays, and longline fishing in the nearby open sea.

Is it deforestation or desertification when we do it to the ocean?

Anecdotal evidence from 60 marine species suggests a pattern of resource exhaustion rather than sustainable use. There is a reason to believe that biomass in the Atlantic Western Boundary Current Fishery-Grand Banks, Newfoundland, North Atlantic, Norwegian Sea, Barents Sea is 3-10% of what it was when fishing was started. Selective removal of large species may have caused major nutrient distribution in both rich and poor waters.

Pages

Subscribe to RSS - Oceans