Effect of spawning induced starvation on nutrient loss in males of the annual spawner Atlantic halibut (Hippoglossus hippoglossus)
Publication details
Journal : Aquaculture , vol. 576 , p. 1–6 , 2023
Publisher : Elsevier
International Standard Numbers
:
Printed
:
0044-8486
Electronic
:
1873-5622
Publication type : Academic article
Links
:
ARKIV
:
hdl.handle.net/11250/3074635
DOI
:
doi.org/10.1016/j.aquaculture....
Research areas
Farmed fish
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Summary
Atlantic halibut go through a period with reduced or no feed intake during their spawning period. This study with male Atlantic halibut aimed to assess the effect of a two-month starvation period corresponding to the naturally occurring spawning induced starvation. The actual loss of nutrients compared to initial body burden, was estimated to 25% for gross energy, 32% for total lipid, 14% for crude protein, and 40% and 44% respectively, for the essential fatty acids EPA (C20:5 n-3) and DHA (C22:6 n-3). This indicates that lipid is the preferred energy source during starvation related to spawning, and the n-3 fatty acids are used to a larger extent than other fatty acids, although mono-unsaturated fatty acids (MUFAs) comprised the largest energy reserve. The difference in relative amount of energy and nutrients used should be considered when formulating diets for re-feeding broodstock of annual spawners like the Atlantic halibut.
