Resumen del producto

Terminos lagoon (TL) and continental shelf (CS) have interdependency by biomass and energy exchange between these ecosystems to be important for reproduction, feeding and breeding of species of commercial interest. In this study the spatial-temporal variability of isotopic niche in the community structure influenced by mangrove habitats and seagrass was determined. This fish was collected in TL and the CS in norths seasons, dry and rainy. Subsequently the isotopic composition (?¹³C and ?¹⁵N) of each specimen was determined. He applied the SIBER (Stable Isotope Bayesian Ellipses in R). This fish fauna of the continental shelf adjacent values ??is richer as (?¹³C ? -15 ‰) result of a trophic structure based on submerged vegetation. While the fish fauna present Terms Lagoon less enriched significantly different values ??(?¹³C ? -24 ‰) (P <0.001). An average difference of 0.7 in the trophic diversity of ichthyofauna in this Terms Lagoon compared with the adjacent continental shelf is observed, finding the Mean distance to centroid (CD ? 2.8) and the total area of the convex hull area (TA ? 76) in the rainy season. The CS has a higher trophic redundancy, have lower Mean nearest neighbor distance between species (NND ? 0.75).

Palabras clave: Ichthyofauna; isotopic niche; isotope; SIBER

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