WorldFish is an international, nonprofit research organization that harnesses the potential of fisheries and aquaculture to reduce hunger and poverty. Our publications database contains WorldFish publications and references to WorldFish research published in refereed journals and periodicals.

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A compilation of values for the exponential coefficient of natural mortality (M) is given for 175 different stocks of fish distributed in 84 species, both freshwater and marine, and ranging from polar to tropical waters.

Fish, Stocking

The main purpose of the study is to collect information on the input-output relationships in milkfish (Chanos chanos ) production in the Philippines. The data (analysis of which will be complete in mid-1980) can then be used to improve production operations.


A research project was initiated in 1977 at the Freshwater Aquaculture Center (FAC) of the Central Luzon State University (CLSU) design a fish polyculture system that would provide the highest economic return, giving manure as the only nutrient source, 2) determine the maximum pig or duck stocking rate per unit area of freshwater fish pond, and 3) clarify the economics of the developed production system(s).