Growth of Crassostrea gasar cultured in marine and estuary environments in Brazilian waters

Pesquisa Agropecuária Brasileira

Gustavo Ruschel Lopes²  Carlos Henrique Araujo De Miranda Gomes²  Cláudio Rudolfo Tureck¹  Claudio Manuel Rodrigues De Melo² 

[1] ,Universidade Federal de Santa Catarina Laboratório de Moluscos Marinhos Florianópolis SC ,Brazil

关键词: mangrove oyster;    mariculture;    nonlinear models;    ostra-do-mangue;    maricultura;    modelos não lineares;   

DOI  :  10.1590/S0100-204X2013000800024

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the growth of the mangrove oyster Crassostrea gasar cultured in marine and estuarine environments. Oysters were cultured for 11 months in a longline system in two study sites - São Francisco do Sul and Florianópolis -, in the state of Santa Catarina, Southern Brazil. Water chlorophyll-α concentration, temperature, and salinity were measured weekly. The oysters were measured monthly (shell size and weight gain) to assess growth. At the end of the culture period, the average wet flesh weight, dry flesh weight, and shell weight were determined, as well as the distribution of oysters per size class. Six nonlinear models (logistic, exponential, Gompertz, Brody, Richards, and Von Bertalanffy) were adjusted to the oyster growth data set. Final mean shell sizes were higher in São Francisco do Sul than in Florianópolis. In addition, oysters cultured in São Francisco do Sul were more uniformly distributed in the four size classes than those cultured in Florianópolis. The highest average values of wet flesh weight and shell weight were observed in São Francisco do Sul, whereas dry flesh weight did not differ between the sites. The estuary environment is more promising for the cultivation of oysters.

【 授权许可】

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