The anchovy larval net was introduced to Taiwan in 1977. Due to the smallmesh size and the highly fishing efficiency of the net, the larvae and juvenilesof engraulids and many other demersal fishes were caught in a great amount. As aresult, the fisheries resource of engraulid and demersal species are greatlyreduced. It also affects the movement of many other pelegic species which dependon engraulid as food. Consequently, there is little fish resource available forfishing by torch light, drift net and long line. These fishing methods are themajor fisheries in coastal water of Taiwan. Thus, several problems arise such asthe unequal allocation of fishery resources, the decline economy in fishermencommunities, the protest from environmental conservationists, the generalsecurity of society etc.