Dynamics of lipid and phospholipid content was studied during early development of freshwater salmon Salmo salar L. from blastodisc formation (3 h) to hatching (108 days) as well as in eggs before fertilization. High and stable content of total lipids including structural phospholipids as well as relatively high content of triglycerides and its slight increase at the time of hatching have been demonstrated, which can indicate their utilization as the main energy source after hatching under conditions of deficient food and low fry activity for some time. Accumulation of a certain level of lipids in eggs before spawning is required for embryonic development and high survival after hatching. The significance of increasing and decreasing levels of structural lipids modulating membrane enzyme activities in metabolic changes before hatching is discussed.
Russian Journal of Developmental Biology – Springer Journals
Published: Jun 6, 2009
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