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Aerial survey of manatees, dolphins and sea turtles off northeastern Brazil: Correlations with coastal features and human activities

Maria Danise de Oliveira Alves, Auteur ; Ralf Schwamborn, Auteur ; Joao Carlos Gomes Borges, Auteur ; Miriam Marmontel, Auteur ; Alexandra Fernandes Costa, Auteur ; Carlos Augusto Franca Schettini, Auteur ; Maria Elisabeth de Araujo, Auteur

Dans Biological Conservation (161 MAY 2013)

The objective of the present study was to analyze the distribution of manatees, dolphins and sea turtles off northeastern Brazil through aerial surveys, relating them to specific habitats and human activities, with emphasis on marine protected a[...]

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Article

Stable Isotope Discrimination by Consumers in a Tropical Mangrove Food Web: How Important Are Variations in C/N Ratio?

Ralf Schwamborn, Auteur ; Tommaso Giarrizzo, Auteur

Dans Estuaries and Coasts (38(3) MAY 2015)

Stable isotopes are widely used as tracers in food webs and as indicators of the trophic levels (TL) of consumers. The objectives of this study were to verify a possible ecosystem-wide increase in the relative contribution of the heavy isotope w[...]

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