Preliminary observations on the nutritional value of ‘Tahiti Isochrysis’ to bivalve larvae

Helm, M.M.; Laing, Ian

doi:10.1016/0044-8486(87)90170-0

Cited by 84 publications

(40 citation statements)

References 12 publications

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“…Conversely, they had different 20:5(n-3) contents (20.2% and 6.7%, respectively). The observed fatty acid composition was in agreement with the results of Helm and Laing (1987) and Fernández-Rieriz et al (1998).…”

Section: Discussionsupporting

confidence: 82%

Effect of a mono-specific algal diet on immune functions in two bivalve species -Crassostrea gigasandRuditapes philippinarum

Delaporte

Soudant

Moal

et al. 2003

Journal of Experimental Biology

179

103

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International audienceThe impact of diets upon the fatty acid composition of haemocyte polar lipids and consequently upon immune parameters has been tested in the oyster Crassostrea gigas and the clam Ruditapes philippinarum. Oysters and clams were fed each of three cultured algae: Chaetoceros calcitrans, which is rich in 20:5(n-3) and 20:4(n-6) and poor in 22:6(n-3) fatty acids; T-Iso (Isochrysis sp.), which is rich in 22:6(n-3) and deficient in 20:5(n-3) and 20:4(n-6); and Tetraselmis suecica, which is deficient in 22:6(n-3) and contains only small amounts of 20:5(n-3) and 20:4(n-6). Fatty acid composition of haemocyte polar lipids was greatly affected by the diet. Oysters and clams fed C. calcitrans maintained a higher proportion of 20:5(n-3) and 20:4(n-6) in their haemocyte polar lipids, while these polyunsaturated fatty acids decreased drastically for animals fed T-Iso. However, the T-Iso diet maintained 22:6(n-3) in haemocyte polar lipids of both species. Higher 20:5(n-3) and 20:4(n-6) contents in diets appeared to have a positive effect upon total haemocyte count, granulocyte percentage, phagocytic rate and oxidative activity of clam haemocytes. Similarly, a positive effect of 20:5(n-3) on oxidative activity of oyster haemocytes was observed but to a lesser extent than in clams. Interestingly, when oyster haemocytes are submitted to a stressful condition, a positive effect of a higher dietary 22:6(n-3) content on the phagocytic rate was noticed

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Section: Discussionsupporting

confidence: 82%

Effect of a mono-specific algal diet on immune functions in two bivalve species -Crassostrea gigasandRuditapes philippinarum

Delaporte

Soudant

Moal

et al. 2003

Journal of Experimental Biology

179

103

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“…The spat showed poorest growth when feeding on T-Iso compared to feeding on C. gracilis and I. galbana. Okauchi suggested that the low content in T-Iso of eicosapentaenoic acid (EPA), a potentially essential lipid, may be the dietary factor limiting its value for oyster growth (see also Pilsbury 1985, Helm & Laing 1987. For culture of bivalves, T-Iso is generally used in combination with other microalgal species to achieve a diet without nutritional deficiencies.…”

Section: Effects Of Food Species On Energeticsmentioning

confidence: 99%

“…In particular, energy balances obtained for various microalgal diets and concentrations are of interest for bivalve aquaculture because pure cultures of unicellular microalgae are widely used as food for rearing larvae and spat, and for broodstock maturation. However, in spite of comparisons of nutritive values of microalgae (Finlay & Uhlig 1981, Pillsbury 1985, Helm & Laing 1987, Whyte 1987 and growth rates of bivalves (Walne 1970, Helm 1977, Ewart & Epifanio 1981, Langdon & Waldock 1981 on various diets, the way that different microalgal diets influence feeding (filtration, pseudofaeces production, ingestion and digestion) and energy balance has not been fully appreciated. Thus, studies of the influence of microalgal diet and concentration on feeding and energy balance of commercially important bivalve species can provide useful information for both ecology and aquaculture.…”

Section: Introductionmentioning

confidence: 99%

Comparative effects of microalgal species and food concentration on suspension feeding and energy budgets of the pearl oysters Pinctada margaritifera and P. maxima (Bivalvia:Pteriidae)

Yukihira¹,

Klumpp²,

Lucas³

1998

Mar. Ecol. Prog. Ser.

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ABSTRACT-This study aimed to determine the influence of microalgal species and food concentration on various physiological parameters and Scope for Growth (SFG) in adults of 2 pearl oysters, Pinctada margantifera and P maxima. Clearance rate, pseudofaecal production rate, absorption efficiency, respiration rate and excretion rate were determined over a range of food concentrations using 2 microalgal diets, Tah~tian Isochrysis sp. (T-Iso) and Dunaliella primolecta at 28'C. Clearance, pseudofaecal production and respiration rates were significantly affected by microalgal diet. From these results, and because of the higher energy content of T-Iso, pearl oysters feeding on T-lso had maximum values of SFG that were 1.5 to 2 1 times higher than when feeding on D. pnmolecta. Clearance rate and absorption efficiency were significantly related to food concentration as negative exponential relationships (p c 0 001). Generally, pseudofaecal production, respiration and excretion rates were significantly related to food concentration as positive linear relationships (p < 0.005) Optimal food concentrations for max~mum SFG for P margarjtifera and P maxima were 1 to 2 mg I-' and 2 to 3 mg I-', respectively. P. maxima was better adapted to a wider range of food concentrations. P. maxima maintained positive SFG up to 9 mg I-' food concentration when feeding on T-lso and up to 7 mg I-' when feeding on D. primolecta, while equivalent values for P. margaritifera were 7 mg 1-' and 5 mg I-', respectively. Thesc results are in accordance with P. maxin~a occurring in a wider range of habitats than P margaritiferd, and experiencing greater concentration ranges of suspended particulate matter

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“…& Newell unpubl. ), which are thought to be required for growth and development of certain bivalve larvae (Helm & Laing 1987, Whyte et al 1989.…”

Section: Diet Compositionmentioning

confidence: 99%

Omnivorous feeding by planktotrophic arvae of the eastern oyster Crassostrea virginica

Baldwin¹,

Newell²

1991

Mar. Ecol. Prog. Ser.

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In order to better understand the particle diet of planktotrophic larvae of the eastern oyster Crassostrea virginica (Gmelin) we measured their ingest~on of naturally occurring food organisms. By using a dual radioisotope (3H and I4C) label~ng technique in conjunction w~t h plankton size fractionation procedures we demonstrate that oyster larvae feed upon bacteria, phagotrophic protozoans and phototrophs present in the diverse summer plankton assemblages of Chesapeake Bay, USA. Prodissoconch I1 oyster larvae cleared 0.2 to 30 pm I4C-labeled plankton (primarily phototrophs) at a rate of 0.0825 n~l larva-' h-', and 0.2 to 30 pm 3H-labeled plankton (heterotrophlc bacteria and phagotrophic protozoans) at a rate of 0.0017 m1 larva-' h-' This calculated clearance rate for 0.2 to 30 pm heterotrophs was low due to the predominance of small (0.2 to 0.8 pm), poorly retained bacteria in thls size class. Oyster larvae consumed a wide size range of food part~cles (0 2-0.8 pm to 20-30 pm) and selectively ingested 20 to 30 pm organisms. In other feeding experiments, oyster larvae cleared laboratory cultured heterotrophic flagellates (12 pm) at a rate of 0.0640 m1 larva-' h-' and cultured heterotrophic ciliates (12 X 20 pm) at a rate of 0.1093 m1 larva-! h" The inclusion of heterotrophic food organisms In the diet of C. virginlca may enhance its growth and development by providing energy and nutrients that supplement those of ingested phytoplankton. We suggest that because oyster larvae ingest non-phytoplankton cells, estimates of standing stocks of phytoplankton may not always b e a reliable measure of food supply

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Preliminary observations on the nutritional value of ‘Tahiti Isochrysis’ to bivalve larvae

Cited by 84 publications

References 12 publications

Effect of a mono-specific algal diet on immune functions in two bivalve species -Crassostrea gigasandRuditapes philippinarum

Effect of a mono-specific algal diet on immune functions in two bivalve species -Crassostrea gigasandRuditapes philippinarum

Comparative effects of microalgal species and food concentration on suspension feeding and energy budgets of the pearl oysters Pinctada margaritifera and P. maxima (Bivalvia:Pteriidae)

Omnivorous feeding by planktotrophic arvae of the eastern oyster Crassostrea virginica

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