Polysaccharide composition of five algal species used as food for larvae of the American oyster, Crassostrea virginica

Chu, Fu‐Lin E.; Dupuy, John L.; Webb, Katie

doi:10.1016/0044-8486(82)90138-7

Cited by 45 publications

(23 citation statements)

References 20 publications

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“…The algae Tetraselrnis suecica, Dunaliella tertiolecta, Pavlova lutheri and Isoehrysis galbana were grown according to the method described in Chu et al (1982). Mixtures of the four species were used to supplement the food of oysters grown in flowing systems and in the laboratory experiments.…”

Section: Algaementioning

confidence: 99%

Metabolism of palmitic, linoleic, and linolenic acids in adult oysters,Crassostrea virginica

1991

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Abstract. This study investigated incorporation and metabolism of saturated [(1-~4C) 16:0] and unsaturated [(1-14C) 18:2co6 and (1-14C) 18:3o33] fatty acids in adult eastern oysters, Crassostrea virginica Gmelin (spawned from parents obtained in 1986 from Mobjack Bay, Virginia, USA), and the influence of temperature on these processes. In C. virginica, incorporation of injected palmitic (16:0) and linolenic (18:3033) acids was increased when oysters which had been grown in warm water (22 to 23 °C) were transfered to cold water (5 to 7 °C) for 8 to 18 d. Incorporation of linoleic acid (18:2036) was unchanged under these conditions. The changes in concentration may have been linked to depression of metabolism in these oysters, in particular that of 16:0, which was reduced by 90%. Oxidation of incorporated fatty acids was much higher in warm than in cold water.Cold-temperature conditioning of C. virginica altered the distribution of fatty acids among the neutral and polar lipid fractions. Long-term exposure to cold water increased the proportion Of fatty acids in the polar fraction, which may be related to maintenance of membrane fluidity. Short-term exposure to cold water had the opposite effect, which may be due to increased energy requirements as the oyster adapts to new conditions. Reutilization of ~4C-acyl groups demonstrated de novo synthesis of 16:0 and 18:0 fatty acids. Only limited elongation and no desaturation of the administered fatty acids was observed.

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Section: Algaementioning

confidence: 99%

Metabolism of palmitic, linoleic, and linolenic acids in adult oysters,Crassostrea virginica

1991

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“…Brown et al 1989Brown et al , 1997. The biochemical composition of microalgae is affected by the growth environment which can be manipulated by changing the culture medium (Wikfors et al 1984;Ben-Amotz et al 1985), temperature (Redalje and Laws 1983;James et al 1989), stage of harvest (Chu et al 1982;Whyte 1987) and light conditions (Caron et al 1988;Sicko-Goad et al 1988;Cohen et al 1988; Thompson et al 1990). …”

Section: Introductionmentioning

confidence: 97%

Does a large-scale continuous algal production system provide a stable supply of fatty acids to bivalve hatcheries?

2010

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The variation of fatty acid (FA) content and composition of the microalgal production (Isochrysis sp., Pavlova lutheri and Chaetoceros muelleri) in a continuous large-scale production system (500-L bags) used in hatcheries were analysed. The variation of the FAs was analysed in replicate bags over time for the different species. Total FA content (pg cell −1 ) increased significantly (p<0.05) in the P. lutheri and C. muelleri bags over time. The content of the essential FAs (arachidonic acid (ARA), eicosapentaenoic acid (EPA), n-6 docosapentaenoic acid (n-6 DPA) and docosahexaenoic acid (DHA)) increased over time in all of the species, except for DHA in Isochrysis sp. The content of EPA and ARA were highest in C. muelleri, whilst n-6 DPA and DHA were highest in Isochrysis sp. The FA composition in the C. muelleri bags showed large variability between bags at the beginning of the experiment, but decreased over time. In contrast, the FA composition of Isochrysis sp. and P. lutheri did not vary much over time, but larger variability was observed between the replicate bags. The results indicate that, even though the essential polyunsaturated FAs (PUFAs) varied between the different species, the total microalgal production secured a stable and increased supply of all the essential PUFAs to the scallop larvae and spat.

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“…Phototrophic microorganisms have significant potential as alternative energy feedstocks because of their ability to accumulate both lipids (Guschina and Harwood 2006) and polysaccharides (Chu et al 1982;Whyte 1987) for intracellular energy storage. Research into lipid accumulation (Chiu et al 2009;Converti et al 2009;Guschina and Harwood 2006;Harwood and Guschina 2009) and the conversion of phototrophic microorganisms to biodiesel (Chisti 2007;Lardon et al 2009;Mata et al 2010) has rapidly increased in recent years because of its potential implications for transportation-based fuels (Chisti 2008).…”

Section: Introductionmentioning

confidence: 99%

A Lumped Pathway Metabolic Model of Carbohydrate- and Lipid-Accumulating Phototrophs

Guest¹,

Loosdrecht

Skerlos

et al. 2012

proc water environ fed

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A lumped pathway metabolic model was developed for carbon-accumulating phototrophic microorganisms. The model (denoted the Phototrophic Process Model, or PPM) was developed using the metabolic pathways of Chlamydomonas reinhardtii (a green alga), which were used to solve for model stoichiometry. The PPM was structured in a manner consistent with the Activated Sludge Models (ASMs), and is presented as a stoichiometric matrix and a set of transformation processes. State variables include functional biomass (X CPO ), stored lipids (as triacylglycerol; X TAG ), and stored carbohydrates (as polyglucose; X PG ) among others. Model structure was refined and kinetic parameters were calibrated and validated based on experiments with a mixed community of phototrophic microorganisms in flat panel photobioreactors (PBRs) operated as cyclostats (i.e., chemostats subjected to a day:night light regime). The model was a reasonable predictor of growth and organic carbon storage/mobilization, but requires additional refinement to enable wastewater treatment modeling.

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Polysaccharide composition of five algal species used as food for larvae of the American oyster, Crassostrea virginica

Cited by 45 publications

References 20 publications

Metabolism of palmitic, linoleic, and linolenic acids in adult oysters,Crassostrea virginica

Metabolism of palmitic, linoleic, and linolenic acids in adult oysters,Crassostrea virginica

Does a large-scale continuous algal production system provide a stable supply of fatty acids to bivalve hatcheries?

A Lumped Pathway Metabolic Model of Carbohydrate- and Lipid-Accumulating Phototrophs

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