The influence of allochthonous macroalgae on the fish communities of tropical sandy beaches

The influence of allochthonous macroalgae on the fish communities of tropical sandy beaches

Author Andrades, Ryan Google Scholar
Gomes, Marcelo Paes Google Scholar
Pereira-Filho, Guilherme Henrique Autor UNIFESP Google Scholar
Souza-Filho, Jesser Fidelis de Google Scholar
Albuquerque, Cristiano Queiroz de Google Scholar
Martins, Agnaldo Silva Google Scholar
Institution Univ Fed Espirito Santo
Inst Fed Educ Ciencia & Tecnol Espirito Santo
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal de Pernambuco (UFPE)
Abstract This study evaluates the hypothesis that detached macroalgae (drift algae) influence the structure of fish communities in the surf-zones of two tropical sandy beaches from the central coast of Brazil. Surf-zone seine hauls were conducted weekly during three consecutive 6-week periods according to the occurrence of drift algae in pre-drift, drift and post-drift periods. Drift algae comprised 33 macroalgae species and likely came from offshore rhodolith beds. Fish biomass, density and species richness increased from pre-drift to drift periods, and species composition differed significantly between periods, particularly in the more sheltered of the sampled beaches. the density of young-of-the-year (YOY) fishes also increased significantly from the pre-drift to drift periods, suggesting the importance of drift algae to early fish stages. the gut contents of the two most abundant species during the drift algae period, Trachinotus falcatus and Trachinotus goodei, demonstrated the importance of macrophyte-associated amphipods in their diets, suggesting that the drift algae may be used as feeding habitats for these species. Our results showed that the influx of allochthonous drift algae may structure fish communities of tropical sandy beaches and that it may also represent an important alternative resource for YOY fish by providing shelter and food during autumn and winter. (C) 2014 Elsevier B.V. All rights reserved.
Keywords Fish
Surf zone
Nursery grounds
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Espirito Santo (FAPES)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Grant number FAPES: 002/2009
CAPES-PNPD: 02907/09-7
Date 2014-05-01
Published in Estuarine Coastal and Shelf Science. London: Academic Press Ltd- Elsevier B.V., v. 144, p. 75-81, 2014.
ISSN 0272-7714 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 75-81
Access rights Closed access
Type Article
Web of Science ID WOS:000337881400009

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