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espanolEste estudio se realizo en Armacao de Buzios, en Brasil, un municipio en el que se ha observado la degradacion de algunos ecosistemas tras el gran aumento del turismo y el crecimiento demografico. El objetivo fue determinar las variaciones estacionales de tres poblaciones de Buzios del caballito de mar, Hippocampus reidi. Las inmersiones mensuales se realizaron entre noviembre de 2011 y octubre de 2013. Las tres subpoblaciones tenian baja densidad de caballitos de mar y carecian de estacionalidad. La razon de sexos fue diferente para cada sitio. Los microhabitats mas utilizados fueron la esponja Aplysina fulva y el alga Sargassum sp. No hubo diferencias significativas ni en temperatura ni en salinidad. Las tendencias ambientales no pudieron explicar la variacion de la densidad de caballitos de mar en las tres playas. La poblacion no mostro estacionalidad y no disminuyo mas. EnglishThis study was conducted in Armacao de Buzios, Brazil, a municipality where ecosystem degradation has been observed following large increases in tourism and population growth. The goal of this study was to determine seasonal variations in three Buzios populations of the long snout seahorse Hippocampus reidi. Monthly dives were conducted from November 2011 to October 2013. All three subpopulations had low densities of seahorses and no seasonality. The sex ratio differed at each site. The most commonly used microhabitats were the sponge Aplysina fulva and the seaweed Sargassum sp. There was no significant difference in temperature and salinity. The environmental trends could not explain the variation in seahorse density at the three beaches. The population showed no seasonality and no further decline.

Population dynamics of the endangered seahorse Hippocampus reidi Ginsburg, 1933 in a tropical rocky reef habitat