Assessing fatty acid remodelling during embryogenesis in Greenland halibut (Reinhardtius hippoglossoides) exposed to hypoxia
| Autor: | Céline Audet, Yvan Lambert, Sahar Mejri, Réjean Tremblay |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
chemistry.chemical_classification Ecology Hatching 010604 marine biology & hydrobiology Gondoic Acid Embryogenesis Fatty acid Hypoxia (environmental) 04 agricultural and veterinary sciences Aquatic Science Biology Halibut biology.organism_classification 01 natural sciences Reinhardtius hippoglossoides Oleic acid chemistry.chemical_compound Animal science Biochemistry chemistry 040102 fisheries 0401 agriculture forestry and fisheries Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine Biology. 164 |
| ISSN: | 1432-1793 0025-3162 |
| Popis: | Eggs of Greenland halibut (Reinhardtius hippoglossoides) are subjected to hypoxic conditions in the deep waters of the Estuary and Gulf of St. Lawrence during their development. The aim of this study was to determine whether there was potential remodelling of fatty acids (FA) during embryogenesis in eggs exposed to several levels of dissolved oxygen (DO). Fertilized eggs from three females were exposed to four DO levels: severely hypoxic (10 and 20% sat [percent saturation]), moderately hypoxic (35% sat), and normoxic (100% sat). No FA remodelling was observed in eggs submitted to the different DO levels. The most abundant FA in the polar lipid fraction were docosahexaenoic (DHA, 22:6n-3) and eicosapentaenoic (EPA, 20:5n-3) acids (26 and 22%, respectively), the latter being positively correlated with hatching success. Batches with low hatching success were characterized by eggs with decreased levels of polar EPA and DHA at the end of embryogenesis. Whatever the hatching success, the proportion of FA in the neutral lipid fraction was always significantly lower compared to the polar lipid fraction. Oleic acid (18:1n-9; 17%) was the main FA found in this fraction; together with gondoic acid (20:1n-9), they explained most of the variation in hatching success. |
| Databáze: | OpenAIRE |
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