Commercial fishing of artisans in the area of ??the confluence of the Paraguay-Parana is practiced for decades by a group of fishermen are known collectively as the "malloneros" and "espineleros", which are grouped in about ten ports of debarkation.
Fishermen who make up the Association of Fishermen of Chaco (ASOPECHA) concerned and committed to the situation have begun, with the help of biologists and other professionals - a valuable work of data gathering and analysis of stocks, they permit a better understanding of the dynamics of resources and provide this information to the enforcement authority, thereby contributing to strengthening the management decisions.