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Potencial atrator de peixes ósseos em recife artificial no litoral norte do estado do Rio de Janeiro, Brasil

Attractor potential of osteichthyes in artificial reef on the northern coast of Rio de Janeiro State, Brazil

Resumo

Artificial reefs have become an important and popular resource enhancement technique by concentrating fishes and by increasing natural production of biological resources. In order to increase the necto-benthic colonization potencial, an artificial reef was installed on the northern coast of Rio de Janeiro (21º27'S, 41ºOO'W), an area with typically low relief bottom. Measuring nearly 1500 m², the reef consisted of four sets of different materials randomly disposed: concrete pipes (N = 12); tires structures (N = 20); and cement tanks (N = 7) and pre-made blocks (N = 4). ln order to determine the artificial reef effects on the teleost community, trammel nets were used for monthly sampling the reef site (RA) and on a control area (AC) with sandy bottom. During the 23-month survey from April/96 to March/98, were recorded: a) Chaetodipterus faber (Broussonet, 1782) and Haemulon aurolieatum (Cuvier, 1829) as exclusive species of the RA; b) higher values of species richness and abundance on the RA, at least in 5 of 8 periods; c) increase on the fish abundance on summer months. Correlation analysis indicated that salinity and precipitation were the most significant environmental factors correlated with the temporal fish community variation. This results highlight the importance of rainfall periodicity and the influence of Paraíba do Sul River on the nekton assemblage distribution. It is suggested that the functional role of the artificial reef might be related to higher availability of local shelter and food resources.

Artificial reef; osteichthyes; community structure; temporal variation; Northern coast of Rio de Janeiro


Artificial reef; osteichthyes; community structure; temporal variation; Northern coast of Rio de Janeiro

Potencial atrator de peixes ósseos em recife artificial no litoral norte do estado do Rio de Janeiro, Brasil

Attractor potential of osteichthyes in artificial reef on the northern coast of Rio de Janeiro State, Brazil

Marcelo Paes GomesI; Ronaldo NovelliI; Vicente Vieira FariaII; Ilana Rosental ZalmonI

ILaboratório de Ciências Ambientais, Universidade Estadual do Norte Fluminense. Avenida Alberto Lamego 2000, Horto, 28015-620 Campos dos Goytacazes, Rio de Janeiro, Brasil. E-mail: marcelopgomes@hotmail.com

IIDepartment of Zoology and Genetics, Iwoa State University. Ames, Iwoa 50011, USA

ABSTRACT

Artificial reefs have become an important and popular resource enhancement technique by concentrating fishes and by increasing natural production of biological resources. In order to increase the necto-benthic colonization potencial, an artificial reef was installed on the northern coast of Rio de Janeiro (21º27'S, 41ºOO'W), an area with typically low relief bottom. Measuring nearly 1500 m2, the reef consisted of four sets of different materials randomly disposed: concrete pipes (N = 12); tires structures (N = 20); and cement tanks (N = 7) and pre-made blocks (N = 4). ln order to determine the artificial reef effects on the teleost community, trammel nets were used for monthly sampling the reef site (RA) and on a control area (AC) with sandy bottom. During the 23-month survey from April/96 to March/98, were recorded: a) Chaetodipterus faber (Broussonet, 1782) and Haemulon aurolieatum (Cuvier, 1829) as exclusive species of the RA; b) higher values of species richness and abundance on the RA, at least in 5 of 8 periods; c) increase on the fish abundance on summer months. Correlation analysis indicated that salinity and precipitation were the most significant environmental factors correlated with the temporal fish community variation. This results highlight the importance of rainfall periodicity and the influence of Paraíba do Sul River on the nekton assemblage distribution. It is suggested that the functional role of the artificial reef might be related to higher availability of local shelter and food resources.

Key words: Artificial reef, osteichthyes, community structure, temporal variation, Northern coast of Rio de Janeiro.

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AGRADECIMENTOS. Agradecemos a FENORTE, FAPERJ e CNPq; ao Curso de Bacharelado em Ciências Biológicas da Universidade Estadual do Norte Fluminense; ao apoio de MsC. Flávio Antônio Costa Gomes, do MsC. Eduardo Ayres Godoy de Souza; e do apoio técnico do Sr. Antônio Carlos de Oliveira Peçanha.

Recebido em 30.III.2000; aceito em 24.VII.2001.

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Datas de Publicação

  • Publicação nesta coleção
    08 Maio 2009
  • Data do Fascículo
    Set 2001

Histórico

  • Aceito
    24 Jul 2001
  • Recebido
    30 Mar 2000
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