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Florianópolis, Brazil

Parisenti J.,Federal University of Santa Catarina | Beirao L.H.,Federal University of Santa Catarina | Maraschin M.,Laboratorio Of Morfogenese E Bioquimica Vegetal | Mourino J.L.,Laboratorio Of Camaroes Marinhos | And 3 more authors.
Aquaculture Nutrition | Year: 2011

The aim of this work was to evaluate the effects of Haematococcus pluvialis (H. pluvialis) (carotenoid source) and H. pluvialis plus soy lecithin on development, carotenoid content, and pigmentation of shrimp (Litopenaeus vannamei). One hundred and eighty shrimps (7.8g) were divided in six tanks (n=30) and fed with control food, H. pluvialis, and H. pluvialis plus soy lecithin for 2weeks. Carotenoids were extracted with acetone and quantified by UV-vis spectrophotometry, and astaxanthin was determined by high-performance liquid chromatography. Colour was analysed by colorimetry. Lecithin/H. pluvialis group presented higher survival rate (100%) when compared to control group (93.3%). Haematococcus pluvialis and lecithin/H. pluvialis groups presented higher red-like colour (a 16.4 and 19.9) than control (a 20.6). Lecithin/H. pluvialis group presented higher carotenoids content (8.2mgkg-1 muscle, 26.8mgkg-1 exoskeleton) and astaxanthin (8.5mgkg-1 muscle, 23.3mgkg-1 exoskeleton) than control (carotenoids: 4.2mgkg-1 muscle, 12.3mgkg-1 exoskeleton; astaxanthin: 3.2mgkg-1 muscle, 8.1mgkg-1 exoskeleton). Feeding with 60ppm carotenoids (from H. pluvialis) during 2weeks was sufficient for favouring red-like pigmentation in shrimp, and lecithin increased astaxanthin content only in exoskeleton. © 2010 Blackwell Publishing Ltd.

Pierri V.,Laboratorio Of Camaroes Marinhos | Valter-Severino D.,Laboratorio Of Camaroes Marinhos | Goulart-de-Oliveira K.,Laboratorio Of Camaroes Marinhos | Manoel-do-Espiritosanto C.,Laboratorio Of Camaroes Marinhos | And 2 more authors.
Brazilian Journal of Biology | Year: 2015

The aim of this study was to evaluate the influence of different levels of alkalinity for the superintensive cultivation of marine shrimp Litopenaeus vannamei in biofloc system. A total of 12 experimental circular units of 1000L were used supplied with 850L water from a nursery, populated at a density of 165 shrimps.m–3 and average weight of 5.6 g. The treatments, in triplicate, consisted in four levels of alkalinity in the water: 40, 80, 120 and 160 mg.L–1 of calcium carbonate. To correct the alkalinity was used calcium hydroxide (CaOH). It was observed a decrease in pH of the water in the treatments with lower alkalinity (p<0.05). The total suspended settleable solids were also lower in the treatment of low alkalinity. No significant difference was observed in other physico-chemical and biological parameters in the water quality assessed, as well as the zootechnical parameters of cultivation between treatments (p≥0.05). The results of survival and growth rate of shrimps were considered suitable for the cultivation system used in the different treatments. The cultivation of marine shrimp Litopenaeus vannamei in biofloc at density of 165 shrimps.m–3 can be performed in waters with alkalinity between 40 and 160 mg.L–1 of CaCO3, without compromising the zootechnical indexes of cultivation. © 2015, Instituto Internacional de Ecologia. All Rights Reserved.

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