Silliman Journal, Volumes 31-32

activities agricultural average Bais Bais Bays basis Cadeliña caught changes City clearings considered coral corn crops cultivation cultural Cycle II household cycle stages determined ecological economic effective estimated expand factors Family farm farmers field Figure fish fishermen forest four harvesting hectares hold household members human husband identified included income increase intensity involved Island labor Lake Balinsasayao land largely limited living lowland major mangrove Mean months Negritos Negros niche noted observed participation particular pattern period person Philippines planting population possible practices preparation present problems production reef reported sampling season Selinog shows Silliman University social soil sources species standing strategy suggests supply swidden Table tasks tion trees types upland various wife working-age yield