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Abstract

Ascorbic acid (AA)-enriched Artemia in alginate pellets and unenriched pellets were fed to Jasus edwardsii broodstock to supplement AA intake of the basal diet (mussels, squid and compound prawn pellets) during ovarian development before egg extrusion. Pellet AA content ranged from 150 (unenriched) to 9,153 (enriched) g g-1. The basal diet (150 g AA g-1) was compared to low (150), medium (450) and high (1,350 AA g g-1) AA supplementation. Dietary AA content was obtained using combinations of unenriched and AA-enriched Artemia in combination with the basal diet. Supplementation resulted in ovarian AA saturation at ~240 g g-1, increasing ovarian content by 160%. Digestive gland concentrations were 76-92 g AA g-1 for diets containing  450 g AA g-1, but reached 270 g AA g-1 for the high supplement. The considerable AA store in tail muscle appeared to be translocated to the ovary during maturation. There was no significant AA depletion in eggs during embryogenesis suggesting minimal AA utilization during this phase. J. edwardsii spawns once annually, unlike other multiple spawning crustaceans. Therefore, AA supplementation did not alter fecundity or phyllosoma quality but resulted in a dose-dependent increase (up to 33%) in AA content of eggs and phyllosoma.

Item Type:	Article
Authors/Creators:	Smith, GG and Ritar, AJ and Brown, MR
Keywords:	Artemia, ascorbic acid, Jasus edwardsii, larval quality, maturation diet
Journal or Publication Title:	Aquaculture Nutrition
Additional Information:	The definitive version is available at www.blackwell-synergy.com
Item Statistics:	View statistics for this item

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