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Some aspects of the growth of Gracilaria birdiae (Gracilariales, Rhodophyta) in an estuary in Northeast Brazil
Marinho-Soriano, E.; Moreira, W.S.C.; Carneiro, M.A.A. (2006). Some aspects of the growth of Gracilaria birdiae (Gracilariales, Rhodophyta) in an estuary in Northeast Brazil. Aquacult. Int. 14(4): 327-336. https://dx.doi.org/10.1007/s10499-005-9032-z
In: Aquaculture International. Springer: London. ISSN 0967-6120; e-ISSN 1573-143X
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Aquaculture
    ASW, Brazil, Rio Grande do Norte
    Environments > Aquatic environment > Brackishwater environment
    Flora > Weeds > Marine organisms > Seaweeds
    Population functions > Growth
    Gracilaria birdiae E.M.Plastino & E.C.Oliveira, 2002 [WoRMS]
    Rio Grande do Norte [Marine Regions]
    Marien/Kust
Auteurs  Top 
  • Marinho-Soriano, E.
  • Moreira, W.S.C.
  • Carneiro, M.A.A.
Abstract
    The agarophyte Gracilaria birdiae Plastino & Oliveira was cultivated under field conditions in an estuary over a 6-month period. Biomass production varied significantly (p<0.01) and ranged from 900.0 to 3537.0 g m−2 with a mean of 2124.4±1004.36 g m−2 over the cultivation period. The epiphyte-biomass varied from 64.7 to 313 g m−2, with maximum values observed in July. Relative growth rate (RGR) of G. birdiae varying from −0.59 to 4.67% day−1, with a maximum mean observed in July. Correlation analysis showed that RGR was positively correlated with epiphyte-biomass (R-Pearson=0.69; p< 0.01) and negatively correlated with salinity (R-Pearson=−0.41; p<0.05). These correlations were used in a mathematical regression model to estimate the growth of Gracilaria in an estuary. The regression model explained 61% of RGR variability demonstrating that growth rates of Gracilaria were directly related to the variables salinity and epiphytes. The model was developed to help to predict production at a cultivation site in order to evaluate its suitability for Gracilaria cultivation.
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