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- Title
Effects of chemical and handling exposure on fatty acids, oxidative stress and morphological welfare indicators in gilt-head sea bream ( Sparus aurata).
- Authors
Sánchez-Muros, María; Villacreces, Salvador; Miranda-de la Lama, Genaro; Haro, Carolina; García-Barroso, Fernando
- Abstract
This work investigates the changes in the morphological traits, body composition, body fat and oxidative stress of Sparus aurata under two stress conditions: a low weekly exposure to the pesticide Diuron and chronic handling stress. The fish exposed to handling stress showed lower values in the morphological traits and perivisceral fat, whereas chemical stress induced a decrease in the percentage of muscle and carcase and an increase in the percentage of spleen and hepatosomatic index. The two stress situations produced changes in the FRAP (ferric reducing antioxidant power) levels in all organs studied with a particularly marked response for Diuron in the gill. No significant differences in the ROS (reactive oxygen species) level were found for the digestive tract or the gill. In muscle, only Diuron produced a significant increase in ROS, while in liver, both treatments increased the ROS levels. This supports the oxidative stress sensitivity to chemical stress and shows that also could be an appropriate indicator of handling stress. The morphological indexes and body components examined could be practical and easy welfare indicators. Nevertheless, further works must be needed to use under the production conditions in fish farms.
- Subjects
OXIDATIVE stress; FATTY acids; BODY composition of fish; FISH morphology; EFFECT of chemicals on fishes; EFFECT of pesticides on fishes; SPARUS aurata; FISHES
- Publication
Fish Physiology & Biochemistry, 2013, Vol 39, Issue 3, p581
- ISSN
0920-1742
- Publication type
Article
- DOI
10.1007/s10695-012-9721-2