"A trial was conducted to evaluate the growth performance and survival of Chelidonichthys lucerna. A total of 13 352 180-days old juveniles (5.5 ± 2 g; 5 ± 1 cm) were reared at two different densities (A-EXP = 68 fish m -3; B-FFA = 15 fish m -3) in eight tanks (four tanks per group) for 360 days. The welfare status and meat quality of fish were evaluated for the A-EXP and B-FFA groups in comparison with wild-caught fishery gurnard (C-WID). The survival rate was high for both A-EXP (79%) and B-FFA (93.5%). B-FFA fish had the highest specific growth rate (1.16 vs. 1.07; P < 0.05), and were heavier than A-EXP fish (321 ± 40 g vs .239 ± 44 g; P < 0.01). Rearing conditions did not affect blood metabolites, except for glucose concentrations, which were higher in C-WID (P < 0.05). The meat quality traits showed that reared groups were fatter (2.8-3.2%) than C-WID (0.94%); total n-3 fatty acids (19.02-19.26%) were lower in reared groups than C-WID (29.99%); and EPA + DHA were similar in all groups (15.1-16.61% vs. 27.99%). Despite the good growth and survival, the final mean weight was below that requested by the market (400-500 g). Future research efforts should focus on reducing the feed conversion rate (3:1)."
Tub gurnard Chelidonichthys lucerna L.: A new fish species suitable for farming? First answers evaluating the growth of juveniles reared at different stocking densities, welfare and fillet quality
D'ANDREA, Mariasilvia;PILLA, Fabio;
2013-01-01
Abstract
"A trial was conducted to evaluate the growth performance and survival of Chelidonichthys lucerna. A total of 13 352 180-days old juveniles (5.5 ± 2 g; 5 ± 1 cm) were reared at two different densities (A-EXP = 68 fish m -3; B-FFA = 15 fish m -3) in eight tanks (four tanks per group) for 360 days. The welfare status and meat quality of fish were evaluated for the A-EXP and B-FFA groups in comparison with wild-caught fishery gurnard (C-WID). The survival rate was high for both A-EXP (79%) and B-FFA (93.5%). B-FFA fish had the highest specific growth rate (1.16 vs. 1.07; P < 0.05), and were heavier than A-EXP fish (321 ± 40 g vs .239 ± 44 g; P < 0.01). Rearing conditions did not affect blood metabolites, except for glucose concentrations, which were higher in C-WID (P < 0.05). The meat quality traits showed that reared groups were fatter (2.8-3.2%) than C-WID (0.94%); total n-3 fatty acids (19.02-19.26%) were lower in reared groups than C-WID (29.99%); and EPA + DHA were similar in all groups (15.1-16.61% vs. 27.99%). Despite the good growth and survival, the final mean weight was below that requested by the market (400-500 g). Future research efforts should focus on reducing the feed conversion rate (3:1)."I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
