Productive performance of brown mussels Perna perna (Linnaeus, 1758) cultivated on ropes at low densities in Caraguatatuba, Brazil

Autor(es)

Alves, Jose Luiz i ^[1] ; Nunes Galvao, Marcia Santos ^[1] ; Garcia, Cintia Fernanda ^[1] ; Almeida Marques, Helcio Luis ^[1]

Afiliação do(s) autor(es)

^[1] Fisheries Inst, POB 60092, Sao Paulo 05033970, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AQUACULTURE RESEARCH; v. 51, n. 8 MAY 2020.
• Citações Web of Science: 0

Resumo

In Brazil, mussel seed are not a plentiful natural resource, and so the efficient use of seeds by reducing stocking densities should be considered. There are very few studies addressing the relationship between seeding density and growth of mussels in tropical conditions. This work aimed to determine the influence of low seeding densities on the productive performance of Perna perna (Linnaeus) mussels cultivated on ropes in Caraguatatuba, Brazil. In October 2014, 12 ropes, one metre in length each, were seeded at the densities of 200, 300 and 400 mussels/m (four ropes for each density) and suspended on a long line. After 226 days of growing, mussels were harvested and their performance at each density was evaluated in terms of mean weight and length, production, culture efficiency, condition index, survival, amount of recruited seed, amount of fouling on the ropes and morphometric relationships. We observed no significant differences (p > .05) for these indicators among the densities tested, except for mussel biomass, which was significantly higher (p < .05) at the greater densities. A partial budget analysis showed that the density of 400 m(-1) showed better profitability and should be recommended, even in case of seed shortage. (AU)

• Processo FAPESP: 12/51762-5 - Desempenho produtivo de mexilhões Perna perna (Linnaeus,1758) cultivados no sistema de cordas em diferentes densidades, em Caraguatatuba, SP, Brasil
• Beneficiário: Helcio Luis de Almeida Marques
• Modalidade de apoio: Auxílio à Pesquisa - Regular