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Weight-Length and Length-Length Relationships for 37 Demersal Fish Species from the Marapanim River, Northeastern Coast of Pará State, Brazil

DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v5n3p78-82

http://periodicos.unifap.br/index.php/biota/index 

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Daniel Ferraz1 & Tommaso Giarrizzo2

 

Abstract: Length-length and weight-length relationships are presented for 37 demersal fish species caught in the main channel b of the Marapanim River. The mean allometric coefficient (b) in the weight-length relationship (W = aL ) was 3.04 (±0.32). Positive allometry was predominant (15 species, 42.1%), followed by isometry (13 species, 34.2%), and negative allometry (9 species, 23.7%). The present study represents the first reference of length-length relationships for the northern coast of Brazil.

Key words: Demersal fishes; allometric coefficient; Marapanim; northern coast of Brazil.

 

Resumo: Relações comprimento-comprimento e peso-comprimento são apresentadas para 37 espécies de peixes demersais b capturadas no canal principal do rio Marapanim. O coeficiente alométrico (b) da relação peso-comprimento (W = aL ) apresentou média de 3,04 (±0,32). A alometria positiva foi dominante (15 espécies, 42,1%), seguida por isometria (13 espécies, 34,2%) e alometria negativa (9 espécies, 23,7%). O presente estudo representa a primeira referência de relação comprimento-comprimento para costa norte do Brasil.

Palavras-chave: Peixes demersais, coeficiente alométrico, Marapanim, Costa norte do Brasil.

 

1 Instituto Federal de Educação, Ciência e Tecnologia do Pará (IFPA), Departamento de Pesca e Aquicultura, Bairro do Marco, Belém, Pará, Brasil. E-mail: biopesq@gmail.com
2 Laboratório de Biologia Pesqueira e Manejo dos Recursos Aquáticos, Universidade Federal do Pará (UFPA), Terra Firme, Belém, Pará, Brasil. E-mail: tgiarrizzo@gmail.com

 

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