Aspectos da estrutura populacional de Donax striatus (LINNAEUS, 1758) (MOLLUSCA: DONACIDAE) na Praia do Futuro Fortaleza-CE

• Autor(a) principal: Barreira, Cristina de Almeida Rocha
• Data de Publicação: 2002
• Outros Autores: Batista, Wesley Felix, Monteiro, Dayse de Oliveira, Franklin Junior, Wilson Franklin
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/54283
• topic: Espécie- Donax striatus; Brasil- Ceará-Praia do Futuro; Fauna

The study of the population structure of Donax striatus in Praia do Futuro - CE, was carried out as part of a qualitative and quantitative survey of the benthic macrofauna in this region. The collections were carried out from March 1995 to February 1996, using a PVC cylindrical sampler (Ø = 20 cm and h = 30 cm). The analysis of Donax striatus growth was performed based on the total length of the shells, and using the ELEFAN I program, from the FISAT package. Class intervals with an amplitude of 2.0, 4.0 and 6.0 mm in length were tested, with better adjustments at 6.0 mm intervals (Rn = 0.910). The parameters of the von Bertalanffy curve found were: L∞ = 25.10, K = 1.16 / year and t0 = -0.028 year. The average life expectancy of the species is 12 months. The predominance of juveniles (<6.0 mm), aged 3 months, is probably associated with the intense human use of the region as a leisure area, causing changes in the population patterns of intermaterial organisms