Marketing of the fresh water clam (Galatea paradoxa) in Southeastern Nigeria.

摘要

This study investigated the structure, storage and distribution systems, and profitability of marketing fresh clams (Galatea paradoxa) in relation to harvesting time (dry and raining seasons) and in different locations in Southeastern Nigeria. Our results reveal that the marketing chain starts from the fishers to the consumers, with dealers and retailers as intermediaries. Seasonal fluctuations in supply and trade relationship significantly influence the market. Clam prices were found to fluctuate with size. Prices charged by fishers and dealers were uniform throughout the season. There were significant changes in quantity of clams sold between seasons (P<0.001) and locations (area of purchase) (P<0.05). Duncan's Multiple Range Test showed significant differences in weight of clams from clam-producing areas and other locations. The fishery is characterized by a favourable capital-output ratio, as reflected in the marketing margin; with low production cost and cheap, affordable labour. The implications of these findings to clam market organization, price-quality relationship, food sufficiency, and investment prospect are discussed.