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Effects of a red tide on the structure of estuarine fish assemblages in northeastern Brazil

Identifieur interne : 003E84 ( Main/Exploration ); précédent : 003E83; suivant : 003E85

Effects of a red tide on the structure of estuarine fish assemblages in northeastern Brazil

Auteurs : José Amorim Reis-Filho [Brésil] ; Eduardo M. Da Silva [Brésil] ; José De Anchieta Cintra Da Costa Nunes [Brésil] ; Francisco Barros [Brésil]

Source :

International review of hydrobiology [ 1434-2944 ] ; 2012.

RBID : Pascal:13-0003200

Descripteurs français

Pascal (Inist)
- Marée rouge, Estuaire, Communauté animale, Brésil, Hydrobiologie, Milieu aquatique, Pisces.
Wicri :
- geographic : Brésil.
- topic : Estuaire, Milieu aquatique.

English descriptors

KwdEn :
- Animal community, Aquatic environment, Brazil, Estuaries, Hydrobiology, Pisces, Red tide.

Abstract

The present study evaluated changes in an estuarine fish community caused by blooms of the dinoflagellate Akashiwo sanguinea. Samples were collected before, during and after the red tide using seine nets and surface and bottom nets in three areas near the affected area. The area was around the mouth of the Paraguaçu River. A total of 144 samples were collected, containing 1,989 individuals, with a total weight of 51.4 kg, belonging to 42 species in 29 families. During the red tide, fish density, richness and biomass decreased significantly. Atherinella brasiliensis and Sphoeroides greeleyi were the most abundant species during the red tide, indicating some possible resistance to the effects of the red tide. One month after the red tide, there was a rapid recovery of the density, biomass and richness of fish, and Cetengraulis edentulus was the most captured species. An important result of the present study is the finding that the dynamics of small populations of fish are often influenced by fortuitous events, and stochasticity may dominate. The establishment of a continuous and adequate monitoring program in the area may contribute to understanding the effects of red tides on fish population dynamics.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The present study evaluated changes in an estuarine fish community caused by blooms of the dinoflagellate Akashiwo sanguinea. Samples were collected before, during and after the red tide using seine nets and surface and bottom nets in three areas near the affected area. The area was around the mouth of the Paraguaçu River. A total of 144 samples were collected, containing 1,989 individuals, with a total weight of 51.4 kg, belonging to 42 species in 29 families. During the red tide, fish density, richness and biomass decreased significantly. Atherinella brasiliensis and Sphoeroides greeleyi were the most abundant species during the red tide, indicating some possible resistance to the effects of the red tide. One month after the red tide, there was a rapid recovery of the density, biomass and richness of fish, and Cetengraulis edentulus was the most captured species. An important result of the present study is the finding that the dynamics of small populations of fish are often influenced by fortuitous events, and stochasticity may dominate. The establishment of a continuous and adequate monitoring program in the area may contribute to understanding the effects of red tides on fish population dynamics.</div>
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Effects of a red tide on the structure of estuarine fish assemblages in northeastern Brazil

Effects of a red tide on the structure of estuarine fish assemblages in northeastern Brazil

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri