| Abstract | This study evaluated the growth of the purple sea urchin Paracentrotus lividus, fed with two diets, in sea- and land-based systems compared to wild populations. The experiments investigated the effects of the feeding regimes on gonad yield, nutritional traits and overall quality. Sea-based trials were performed by the CNR of Taranto (Trial S), whereas land-based trials were performed in the facilities of the University of Cagliari (Trial L). Urchins fed with a laboratory prepared pelletized diet (P), and a mix diet PU (50% of P-Diet and 50% of fresh Ulva sp.) were compared to wild urchins (W). In both trials the experimental diets supported a gonad growth when compared to wild population (p < .05). Sensory characteristics, assessed by 6 panel experts for each trial, highlighted significant differences in gonad colour and taste in both trials, while only in Trial S for texture (p < .05). The changes in the biochemical composition of sea urchins' gonads caused significant variations in the nutritional profile. Sea urchins fed with the experimental diets contained higher levels of total protein and lipids and PUFAs than wild sea urchins, although EPA, DHA and n-3/n-6 ratio, were lower in urchins fed with artificial diets. In Trial L, total free amino acids showed an increase respect to W gonads (p < .05), whereas in Trial S, total free amino acids showed a decrease only in sea urchin fed with P-Diet (p < .05). The results presented in this study provide evidence of the good performance of the formulated diet assuming its application for the development of Mediterranean echinoculture. |
| Authors | Prato, Ermelinda; Fanelli, Giovanni; Angioni, Alberto; Biandolino, Francesca; Parlapiano, Isabella; Papa, Loredana; Denti, Giuseppe; Secci, Marco; Chiantore, Mariachiara; Kelly, Maeve S.; Ferranti, Maria Paola; Addis, Piero |
| Text | 398823 2018 10.1016/j.aquaculture.2018.05.010 ISI Web of Science WOS 000432906800030 Scopus 2 s2.0 85048010397 Echinoculture Paracentrotus lividus Experimental diets Gonadosomatic index Sensory Nutritional composition Sea urchin Influence of a prepared diet and a macroalga Ulva sp. on the growth, nutritional and sensory qualities of gonads of the sea urchin Paracentrotus lividus Prato, Ermelinda; Fanelli, Giovanni; Angioni, Alberto; Biandolino, Francesca; Parlapiano, Isabella; Papa, Loredana; Denti, Giuseppe; Secci, Marco; Chiantore, Mariachiara; Kelly, Maeve S.; Ferranti, Maria Paola; Addis, Piero CNR; Univ Cagliari; Univ Genoa; CNR; Scottish Assoc Marine Sci This study evaluated the growth of the purple sea urchin Paracentrotus lividus, fed with two diets, in sea and land based systems compared to wild populations. The experiments investigated the effects of the feeding regimes on gonad yield, nutritional traits and overall quality. Sea based trials were performed by the CNR of Taranto Trial S , whereas land based trials were performed in the facilities of the University of Cagliari Trial L . Urchins fed with a laboratory prepared pelletized diet P , and a mix diet PU 50% of P Diet and 50% of fresh Ulva sp. were compared to wild urchins W . In both trials the experimental diets supported a gonad growth when compared to wild population p < .05 . Sensory characteristics, assessed by 6 panel experts for each trial, highlighted significant differences in gonad colour and taste in both trials, while only in Trial S for texture p < .05 . The changes in the biochemical composition of sea urchins gonads caused significant variations in the nutritional profile. Sea urchins fed with the experimental diets contained higher levels of total protein and lipids and PUFAs than wild sea urchins, although EPA, DHA and n 3/n 6 ratio, were lower in urchins fed with artificial diets. In Trial L, total free amino acids showed an increase respect to W gonads p < .05 , whereas in Trial S, total free amino acids showed a decrease only in sea urchin fed with P Diet p < .05 . The results presented in this study provide evidence of the good performance of the formulated diet assuming its application for the development of Mediterranean echinoculture. Echinoculture Paracentrotus lividus Experimental diets Gonadosomatic index Sensory Nutritional composition Sea urchin 1. Introduction Sea urchin market can be estimated in 70,000 t per year, and the gonads, which are termed roe or uni in the commercial trade, are considered a highly prized delicacy for their quality criteria, and re present a very profitable business with an average price ranging from 60 EUR/Kg to 221 EUR/Kg in the Japanese market, which account for about the 90% of the worldwide demand Stefansson et al., 2017 . Paracentrotus lividus is the main echinoid consumed in Mediterranean and Atlantic Europe FAO, 2015 . Official FAO data, consider France the second largest consumer of sea urchin in the world, consuming around 1000 t per year FAO, 2015 . The fishery of P. lividus ABSTRACT This study evaluated the growth of the purple sea urchin Paracentrotus lividus, fed with two diets, in sea and land based systems compared to wild populations. The experiments investigated the effects of the feeding re gimes on gonad yield, nutritional traits and overall quality. Sea based trials were performed by the CNR of Taranto Trial S , whereas land based trials were performed in the facilities of the University of Cagliari Trial L . Urchins fed with a laboratory prepared pelletized diet P , and a mix diet PU 50% of P Diet and 50% of fresh Ulva sp. were compared to wild urchins W . In both trials the experimental diets supported a gonad growth when compared to wild population p < .05 . Sensory characteristics, assessed by 6 panel experts for each trial, highlighted significant differences in gonad colour and taste in both trials, while only in Trial S for texture p < .05 . The changes in the biochemical composition of sea urchins gonads caused significant variations in the nutritional profile. Sea urchins fed with the experimental diets contained higher levels of total protein and lipids and PUFAs than wild sea urchins, although EPA, DHA and n 3/n 6 ratio, were lower in urchins fed with artificial diets. In Trial L, total free amino acids showed an increase respect to W gonads p < .05 , whereas in Trial S, total free amino acids showed a decrease only in sea urchin fed with P Diet p < .05 . The results presented in this study provide evidence of the good performance of the formulated diet assuming its application for the development of Mediterranean echinoculture. 493 Published version TA5_1_Prato etal_2018.pdf TA5_1_Prato etal_2018.pdf Articolo in rivista Elsevier 0044 8486 Aquaculture Amst. Aquaculture Amst. Aquaculture Amst. Aquaculture. Amst. giovanni.fanelli FANELLI GIOVANNI francesca.biandolino BIANDOLINO FRANCESCA isabella.parlapiano PARLAPIANO ISABELLA ermelinda.prato PRATO ERMELINDA |
