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- Title
Ambient salinity and osmoregulation, energy metabolism and growth in juvenile yellowtail kingfish ( Seriola lalandi Valenciennes 1833) in a recirculating aquaculture system.
- Authors
Blanco Garcia, Ainhoa; Partridge, Gavin J; Flik, Gert; Roques, Jonathan A C; Abbink, Wout
- Abstract
The effects of salinity on plasma osmolality, branchial chloride cell density, feed consumption and conversion and growth performance of yellowtail kingfish ( Seriola lalandi) were evaluated. Fish (11.6 ± 0.6 g) were kept for 29 days at 14, 18, 22, 26 (experimental) and 30 g L−1 (control) salinity in independent, pilot-scale recirculation aquaculture systems. No differences in plasma osmolality or chloride cell numbers in gills were observed, pointing to a strong osmoregulatory capacity in the juveniles. Fish at 14, 18 and 22 g L−1 (7.61 ± 0.19, 7.61 ± 0.01 and 7.61 ± 0.13% day−1, respectively) had higher growth rates than fish at 26 and 30 g L−1 (7.10 ± 0.05 and 6.97 ± 0.06% day−1 respectively). The higher growth rate at lower salinity resulted from increased feed intake; feed conversion was not different. An evaluation of the impact of salinity on growth rate of on-growing stages (till market size) seems warranted to assess whether the profitable effects of low salinity persist in later stages of this important aquaculture species.
- Subjects
SOUTHERN yellowtail; ENERGY metabolism; FISH growth; OSMOREGULATION; AQUACULTURE; EFFECT of salt on fishes; SALINITY; FISHES
- Publication
Aquaculture Research, 2015, Vol 46, Issue 11, p2789
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12433