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Title: Growth and survival of Spisula solidissima similis larvae fed different rations of Tahitian strain Isochrysis species
Authors: Hurley, D.H.
Walker, R.L.
O'Beirn, F.X.
Keywords: Spisula
Food ration
Issue Date: 1997
Publisher: National Shellfisheries Association
Citation: Hurley, D.H., Walker, R.L. and O'Beirn, F.X. (1997) Growth and survival of Spisula solidissima similis larvae fed different rations of Tahitian strain Isochrysis species, Journal of Shellfish Research, 16(1), pp. 151-155
Series/Report no.: Journal of Shellfish Research;16(1)
Abstract: Laboratory-spawned veliger-stage larvae of the southern Atlantic surfclam, Spisula solidissima similis (Say 1822), were reared to late pediveliger stage on five different cell concentrations of Tahitian strain Isochrysis species (T-Iso) to determine an optimal food ration for this subspecies. Larvae were fed daily 0, 50,000, 100,000, 200,000, or 300,000 cells/mL of T-Iso. Day-old veliger larvae were stocked in 150 (1-L) replicate flasks at mean densities of 0.7 or 0.8 larvae/mL for trials A and B, respectively. Larval growth and survival were assessed every 2 days over the 14-day trial penods. Significantly greater growth and survival of larvae occurred in both trials in the lower food rations of 50,000 and 100,000 cells/mL. A reduction in larval growth rate and survival was observed at the higher ration treatments. A decline in overall larval health may be associated with the deliterious effects of surplus ration degradation.
Description: Peer-reviewed.
ISSN: 0730-8000
Appears in Collections:Benthos Ecology

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