• Biodiversity of marine fishes from shellmounds of ilha grande bay, Rio de Janeiro, Brazil
  • Biodiversidad de peces de concheros de la bahía de ilha grande, Rio de Janeiro, Brasil
Augusto Barros Mendes, Edson Pereira Silva, Rosa Cristina Corrêa Luz Souza

Abstract

Ilha Grande Bay region comprises a large biological biodiversity distributed in different ecological compartments and also is surrounded by shellmounds dating between 8.000 and 2.000 years B.P. A check list of Fish fauna from 11 of these shellmounds was done and compared with nowadays fish inventory for the region. Most of the species recorded for the shellmounds belongs to the class Chondrichthyes (53.5%), which is represented in the check list by 9 families and 38 species, being Carcharhinus Blainville, 1816, the genus with the highest number of species. Regarding the Osteichthyes, 16 families and 33 species were recorded. Micropogonias furnieri (Desmarest, 1823) was recorded for all sites. Most of the fish identified has a wide distribution in the western Atlantic (35.2%), pelagic behavior (35.2%) and inhabits estuarine environments (36.6%). Almost all the records are composed of noble fish representing top chain carnivorous which can reach large sizes, especially the Chondrichthyes. Comparisons done with current ichthyofauna data for the area (Ministry of Environment Brazil) have shown high similarity between past and present pattern of biodiversity, although some discrepancies were found for comparisons sorting species by their ecological compartments. The results show that shellmounds are valuable repositories of information concerning species composition in the past and, therefore, to the study of evolution of biodiversity patterns over time. Data on this nature are important for conservation and management strategies.

Resumen

La región de la bahía de Isla Grande cuenta con una gran biodiversidad ictiológica distribuida en diferentes concheros fechados entre 8.000 y 2.000 años A.P. Se presenta una lista de las especies a partir del registro en once concheros y se discute la presencia de estas especies en los registros de la fauna actual. La mayor parte de las especies estudiadas pertenecen a los Chondrichthyes (53,5%), discriminadas en 9 familias y 38 especies. Entre éstas Carcharhinus Blainville, 1816, es el género con mayor número de especies. En cuanto a los Osteichthyes, se registraron 16 familias y 33 especies. La corvina rubia Micropogonias furnieri (Desmarest, 1823) se registró en todos los concheros. La mayoría de los peces identificados presentan una amplia distribución en el Atlántico occidental (35,2%), son demersales (35,2%) y de ambientes estuarinos (36,6%). La mayor frecuencia de los registros está representada por especies de Chondrichthyes com grandes tamaños que conforman el tope de la cadena alimentar.. Las comparaciones entre la biodiversidad ictiológica del Holoceno al Reciente muestran similitudes significativas. Sin embargo, se observan discrepancias cuando se comparan los ambientes ecológicos. Los resultados muestran que los concheros son reservatorios valiosos para estudiar la diversidad ictiológica del Holoceno y de las condiciones prístinas, para poder evaluar las estrategias de conservación y manejo.

keywords

Shellmounds; Biodiversity; Marine Fishes; Conservation; Archaeozoology

Palabras clave

Concheros; Biodiversidad; Peces Marinos; Conservación; Arqueozoología

Texto completo: PDF



DOI: 10.5354/0719-1472.2014.36207