The potential of deepwater petroleum structures to affect Gulf of Mexico fisheries by acting as fish aggregating devices (FADS)

Abstract

Existing scientific information, from published studies of FADs elsewhere or from fundamental understanding of fish aggregation and attraction, phenomena and processes, is not sufficient for understanding or predicting potential FADs effects of GOM DPSs. However, some valuable conclusions can be made from the existing body of knowledge. The existing information on FADs indicates that several commercially and recreationally important species will be or are already being attracted to GOM DPSs. The main species are yellowfin tuna (Thunnus albacares), skipjack (Katsuwonus pelamis), and bigeye tuna (Thunnus obesus). Based on FADs research and experience around the world, it may be subjectively inferred that GOM DPS FADs effects are likely to occur and possibly could be substantial. However, the existing information is inadequate for scientifically predicting the degree to which such aggregation will
occur, let alone for predicting impacts on populations or fisheries. Aggregation of other species such as billfish, wahoo, dolphin, sharks, and coastal pelagics also may occur. Similarly, the existing information is insufficient with regard to understanding the phenomena or processes involved in fish attraction to objects. Thus, it is impossible to make scientific projections as to the degree to which different structures or DPS components would attract large pelagic fish. Existing information is completely inadequate for analyzing factors such as size, color, shape, lighting etc.