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- Title
Effect of Long-Term Day/Night Temperature Oscillations on the Overall Performance of Gilthead Seabream (Sparus aurata) Juveniles.
- Authors
Matias, Ana Catarina; Araújo, Ravi Luna; Ribeiro, Laura; Bandarra, Narcisa Maria; Gonçalves, Amparo; Pousão-Ferreira, Pedro
- Abstract
Water temperature variations affect fish growth and health, often leading to huge losses in fish production, especially during the cold season. To alleviate this constraint, fish farmers can use a water heating system driven by solar energy during daytime. This action will cause a water temperature drop during the night period, making it important to understand the physiological response of fish exposed to the resulting day/night temperature oscillations. To investigate this scenario, gilthead seabream juveniles (96.3 ± 1.0 g) were exposed to different thermal regimes for 67 days: Tconstant and Tdaily cycles. The latter group was exposed to daily water temperature oscillations between ~19 and 13 °C compared with a constant temperature of ~19 °C for the other experimental group. Temperature fluctuations compromised fish growth efficiency and reduced the proportion of fatty acids in several tissues, with implications for the whole proximate composition. Moreover, temperature oscillations influenced several blood parameters. These results favor the usage of a constant water temperature of ~19 °C for optimal gilthead seabream juvenile production instead of a day/night water temperature oscillating regime. Nevertheless, the type of energy used to warm the water will depend on the operational conditions and/or business strategy of fish farmers.
- Subjects
SPARUS aurata; SOLAR heating; WATER temperature; OSCILLATIONS; FISH culturists; SOLAR water heaters
- Publication
Journal of Marine Science & Engineering, 2023, Vol 11, Issue 9, p1687
- ISSN
2077-1312
- Publication type
Article
- DOI
10.3390/jmse11091687