Effect of dietary marine lipids on female white bass ova compositions and progeny survival |
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Authors: | H A Lewis J T Trushenski R L Lane C C Kohler |
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Institution: | (1) Fisheries and Illinois Aquaculture Center and Department of Zoology, Southern Illinois University Carbondale, Carbondale, IL 62901-6511, USA |
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Abstract: | We evaluated white bass ovum fatty acid composition as well as embryonic and larval survival after varying n-3 and n-6 long-chain
polyunsaturated fatty acid (LC-PUFA) concentrations in maternal diets. Diets containing graded levels (0, 33, 66, or 100%)
of squid to menhaden oils were fed daily to apparent satiation to female white bass for 8 weeks prior to spawning. Embryonic
survival was negatively related to maternal squid oil intake (P = 0.015, R
2 = 0.970). Squid oil-fed broodstock produced ova with decreased 20:5n-3 and increased C18 polyunsaturated fatty acid concentrations, largely reflecting the fatty acid profile of squid oil. Within ovum phospholipid,
accumulation of 18:2n-6 may have altered biological function resulting in the lower embryonic survival among ova produced
from the squid oil-fed broodstock. Our data suggest the importance of feeding white bass broodstock diets high in total n-3
LC-PUFA (at least 4.0% dry matter), and 20:5n-3-rich lipid sources such as menhaden oil can be effectively utilized by female
white bass to produce quality ova. |
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