The effect of supplementary algal feeding of a hatchery breeding stock of Ostrea edulis L. on larval vigour
Helm, M.M.; Holland, D.L.; Stephenson, R.R. (1973). The effect of supplementary algal feeding of a hatchery breeding stock of Ostrea edulis L. on larval vigour. J. Mar. Biol. Ass. U.K. 53(3): 673-684
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769, more
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| Authors | | Top |
- Helm, M.M.
- Holland, D.L.
- Stephenson, R.R.
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| Abstract |
Adult European flat oysters, O. edulis receiving a food supplement of the unicellular alga Tetraselmis suecica (Kylin) Butch. during lab conditioning for spawning produced more broods of larvae than oysters receiving only the natural phytoplankton in the seawater supply. Many of the broods from adults receiving this extra food were liberated sooner, and these larvae grew at an enhanced rate and provided greater spat yields than the broods from the control stock. The viability of larvae, which was significantly correlated with their lipid, and in particular neutral lipid, proportion at the time of liberation, declined as the length of the stock-conditioning period prior to female spawnings increased. This may be related to the decline in the dry meat wt and the condition factor of the adult oysters during the experiments irrespective of the feeding regime. The extra algal ration provided a check to the decline in dry meat wt of the food-supplemented adults. |
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