Resumen del producto

The goal of this study was to evaluate the effect of organic waste from yellowtailkingfish (Seriola lalandi) mariculture on seafloor sediments in Magdalena Bay, BajaCalifornia Sur. For the spatial analysis of the benthic macroinvertebrate community,sediment samples were collected below the cage and control areas in 2017. Sandysediments predominated in the study area; organic matter content ranged from nitrogen and total phosphorus concentration showed significant differences betweenest density corresponded to polychaete annelids. BOPA index values indicate a lowdisturbance level in the study area; however, the distribution of benthic abundanceshows a clear separation between zones, related to differences in total phosphorusand total nitrogen contents. The results obtained indicate that the fish farm generateda spatial differentiation of the benthic macroinvertebrate community, althoughorganic farm waste has had a low impact on the seafloor. Results also show thatbenthic macrofauna is a good ecological indicator and that benthic indices provide auseful tool to evaluate environmental quality

Palabras clave: benthos; bio-indicators; environmental impact; Mariculture; Organic matter; soft sediments

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