Introduction:

The El Pelado Marine Reserve is an important protected area of the Ecuadorian coast due to the connectivity it has with other marine protected areas.

Objective:

Identify patterns of spatial variation in the community structure of shallow fund macrobenthos.

Materials and Methods:

Ten sites were sampled in the area near the coast and the El Pelado Islet. The abundance of macroinvertebrates and sessile organisms was estimated visually by diving along two parallel transects parallel to the coast. Each transect was 50 m long and 5 m wide, with a total area of 500 m2 per location. Salinity, pH, residual chlorine, oxygen, floating material, fecal coliforms, mercury, oils and fats were recorded on the sea surface.

Results:

92 species were identified (86 species of invertebrates and 6 species of macroalgae); the best represented group was the cnidarians with 31 species from 13 families, followed by the molluscs with 15 species from 11 families. The species with higher average abundances were of macroinvertebrates Echinometra vanbrunti (21.54%), sessile organisms Bugula californica (34.2%).

Conclusions:

No significant differences were found in the diversity, richness and equity of macrobenthic species between study areas.

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