Fission–fusion social systems, in which members of a social community form frequently changing subgroups, occur in a number of mammalian taxa. Such systems are assumed to be a response to the costs of grouping, but evidence to support this hypothesis is limited. We use a linear programming...

Entrepreneurship and innovation by actors in the market for non-timber forest products (NTFPs) cannot be fully understood without a proper understanding of the position and behaviour of actors in the value chain of NTFPs. This paper places the market for NTFPs in the emerging literature on value...

When subjected to fungal attack, Aquilaria spp. (Thymelaeaceae) produce a fragrant resin that is traded internationally as gaharu. Socioeconomic aspects of the gaharu trade were investigated via interviews with collectors and local and international traders. In addition, the extent of local and...