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Peracáridos associados aos bancos de Phragmatopoma caudata (Kröyer) (Polychaeta, Sabellariidae) na Praia de Caiobá, Matinhos, Paraná

Peracarids associated to worm reefs of Phragmatopoma caudata (Kröyer) (Polychaeta, Sabellariidae) from Caiobá beach, Matinhos, Paraná

Autoria SCIMAGO INSTITUTIONS RANKINGS

Resumo

A study about composition, relative abundance and densities of peracarid populations associated to worm reefs of P. caudata (Kröyer, 1856) from Caiobá Beach, Matinhos, State of Paraná (25º51'S and 48º 32'W) was carried out. Monthly samples were obtained from August/1997 to July/1998. The density was calculated as the number of individuais per liter of worm reef. Three amphipod and three isopod species were obtained. The total density of the amphipod populations varied from 3.85 ind./l (July) to 70.56 ind./l (December) and that of the isopod from 0.25 ind./l (May) to 11.73 ind./l (March), The annual fluctuation of the amphipod densities was closely related to the weight fluctuation of the associated algae. The most numerous amphipod species was Elasmopus pectenicrus (Bate, 1862) followed by Hyale media (Dana, 1853) and Ericthonius brasiliensis (Dana, 1853). The isopod Paradynoides brasiliensis Loyola e Silva, 1960 was the most numerous followed by Excirolana armata (Dana, 1852) and Dynoides castroi Loyola e Silva, 1960. All amphipods and two isopod species were considered as constant species and they showed continuous breeding all year round. The occurrence of males, females (including ovigerous ones) and juveniles in the most amphipod and isopod populations in the present study indicates that these peracarids perform a complete life cycle within the Phragmatopoma caudata reefs. These constitute an alternative substrate to peracarids living on phytal and sandy habitats.

Peracarids; composition; Phragmatopoma caudata; Matinhos; Paraná

Peracarids; composition; Phragmatopoma caudata; Matinhos; Paraná

Peracáridos associados aos bancos de Phragmatopoma caudata (Kröyer) (Polychaeta, Sabellariidae) na Praia de Caiobá, Matinhos, Paraná1 1 ) Contribuição nº 1303 do Departamento de Zoologia, Universidade Federal do Paraná.

Peracarids associated to worm reefs of Phragmatopoma caudata (Kröyer) (Polychaeta, Sabellariidae) from Caiobá beach, Matinhos, Paraná

Cláudia Regina BosaI; Setuko MasunariII

IDepartamento de Patologia Básica, Universidade Federal do Paraná

IIDepartamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-980 Curitiba, Paraná, Brasil. E-mail: setmas@bio.ufpr.br

ABSTRACT

A study about composition, relative abundance and densities of peracarid populations associated to worm reefs of P. caudata (Kröyer, 1856) from Caiobá Beach, Matinhos, State of Paraná (25º51'S and 48º 32'W) was carried out. Monthly samples were obtained from August/1997 to July/1998. The density was calculated as the number of individuais per liter of worm reef. Three amphipod and three isopod species were obtained. The total density of the amphipod populations varied from 3.85 ind./l (July) to 70.56 ind./l (December) and that of the isopod from 0.25 ind./l (May) to 11.73 ind./l (March), The annual fluctuation of the amphipod densities was closely related to the weight fluctuation of the associated algae. The most numerous amphipod species was Elasmopus pectenicrus (Bate, 1862) followed by Hyale media (Dana, 1853) and Ericthonius brasiliensis (Dana, 1853). The isopod Paradynoides brasiliensis Loyola e Silva, 1960 was the most numerous followed by Excirolana armata (Dana, 1852) and Dynoides castroi Loyola e Silva, 1960. All amphipods and two isopod species were considered as constant species and they showed continuous breeding all year round. The occurrence of males, females (including ovigerous ones) and juveniles in the most amphipod and isopod populations in the present study indicates that these peracarids perform a complete life cycle within the Phragmatopoma caudata reefs. These constitute an alternative substrate to peracarids living on phytal and sandy habitats.

Key Words: Peracarids, composition, Phragmatopoma caudata, Matinhos, Paraná

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AGRADECIMENTOS. À CAPES pela concessão de uma bolsa de Mestrado junto ao Curso de Pós-graduação em Zoologia da UFPR. À Dra Janete Dubiaski-Silva pela confirmação de identificação dos anfípodos.

Recebido em 21.IX.2001; aceito em 06.VI.2002.

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  • 1
    ) Contribuição nº 1303 do Departamento de Zoologia, Universidade Federal do Paraná.

    • Datas de Publicação

    • Publicação nesta coleção
      03 Jun 2009
    • Data do Fascículo
      Jul 2002

    Histórico

    • Recebido
      21 Set 2001
    • Aceito
      06 Jun 2002
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