Premium
An evaluation of tropical brush and vegetation park fisheries
Author(s) -
WELCOMME R. L.
Publication year - 2002
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1046/j.1365-2400.2002.00292.x
Subject(s) - fishing , epiphyte , siltation , vegetation (pathology) , fishery , ecology , environmental science , geography , biology , sediment , medicine , paleontology , pathology
Brush and vegetation parks are common features of many tropical river fisheries. Areas of branches of certain tree and bush species combined with floating vegetation are placed in shallow, sheltered water so as to attract fish. They provide cover and spawning areas for many fish species. They are particularly rich trophically because of the abundance of epiphytic organisms, boring insects and molluscs on the submerged surfaces of the wood and the root systems, and because of the enriched bottom mud caused by decay of the woody material. Yields depend on the amount of woody material used and the age of the park. The economics of their operation can be complex and larger structures rely on a high degree of social organization for their installation and fishing. Fish parks are controversial in many areas, being viewed as an extractive method of fishing, a source of siltation and creator of social inequalities. However, when properly managed very high yields per unit area can be obtained and the structures can change from simple fish attracting devices to a form of aquaculture whereby net production from a river or lake can be increased.