Comparison of growth and lipid composition in the green abalone, Haliotis fulgens, provided specific macroalgal diets

Nelson, Matthew M.; Leighton, D. L.; Phleger, Charles F.; Nichols, Peter D.

doi:10.1016/s1096-4959(02)00042-8

Cited by 93 publications

(98 citation statements)

References 51 publications

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“…Adult mollusks might not strongly require DHA as the most important essential fatty acid. This speculation is supported by some papers which reported extremely low levels of DHA in some gastropod mollusk tissue lipids [45][46][47] , large fl uctuation of DHA levels in the tissue lipids of the pearl oyster 10 , and lack of n-3 PUFA containing DHA in deep-sea bivalve species lipids 48,49 . In conclusion, we determined that the lipids in C. gigas contained high levels of total PUFA in its tissue and, more specifi cally, that high levels of EPA were found in all major classes, such as TAG, PE, and PC.…”

Section: Fatty Acid Composition In Phospholipids Andmentioning

confidence: 78%

High Levels of Icosapentaenoic Acid in the Lipids of Oyster Crassostrea gigas Ranging over Both Japan and France

Saito¹,

Marty²

2010

J. Oleo Sci.

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The lipid and fatty acids of the Pacific oyster, Crassostrea gigas, collected both in Japan and France, were analyzed. Triacylglycerols and sterols were the major classes in the neutral lipids of both populations of C. gigas between the two countries, and they had signifi cant levels of phospholipids (phosphatidylethanolamine and phosphatidylcholine) with ceramideaminoethylphosphonate in their polar tissue lipids. The differences of 18:3n-3 and 22:6n-3 (docosahexaenoic acid; DHA) levels in the depot triacylglycerols suggest the infl uence of dietary phytoplankton in different environments of the two countries. Although the levels of the fatty acids slightly differed, that of 20:5n-3 (icosapentaenoic acid; EPA, 20.5-24.8%) in the triacylglycerols was specifi cally the highest fatty acid in all the samples. The major polyunsaturated fatty acids in the polar lipids of all samples were EPA (13.2-17.8% for phosphatidylethanolamine and 13.4-22.7% for phosphatidylcholine) and DHA (18.9-26.8% for phosphatidylethanolamine and 13.1-22.5% for phosphatidylcholine). The fl uctuation of total PUFA levels in the polar lipids between samples of both countries suggests the infl uence of diet. In addition, the consistently high EPA levels in the phospholipids may compensate for the variation in DHA levels.

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Section: Fatty Acid Composition In Phospholipids Andmentioning

confidence: 78%

High Levels of Icosapentaenoic Acid in the Lipids of Oyster Crassostrea gigas Ranging over Both Japan and France

Saito¹,

Marty²

2010

J. Oleo Sci.

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“…PCAs that used a subset of fatty acids based on metabolic relationships or ratios of n-3/n-6 polyunsaturated fatty acids (PUFA) can sometimes yield additional information (e.g. Alonzo et al 2005 dietary patterns in the present study (see Nelson et al 2002). For all species/phyla combined, at both bioregions and at fished and reserve areas, 78.8 to 82.1% of the total variance was explained by PC1 (Fig.…”

Section: Fatty Acid Profilesmentioning

confidence: 87%

“…The combined chemical tracer approach, however, is limited in distinguishing the contribution of individual species within phyla to the diet of lobsters. Despite being statistically different, the stable isotope and fatty acid values of various ascidian, sea urchin and brown algae species could not be distinguished within their respective phyla for the purposes of trophic analyses (also see Johns et al 1979, Nelson et al 2002, and so the dietary contribution of individual species within these phyla remains unclear.As stable isotopes reveal a bulk signal of all biomolecules present in a sample, the lack of separation in isotopic signatures between species shown in this and other studies is partly explained by the taxonomic and functional similarity of food items (e.g. algae, grazers).…”

mentioning

confidence: 99%

Trophic effects of fishing southern rock lobster Jasus edwardsii shown by combined fatty acid and stable isotope analyses

Guest

Frusher²,

Nichols³

et al. 2009

Mar. Ecol. Prog. Ser.

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The southern rock lobster Jasus edwardsii is a commercial species that has benefited from the complete protection offered by no-take reserves, with higher abundances and larger animals recorded in reserves than in adjacent fished areas. What remains unclear is whether there is any change in the diet of lobsters in reserves, for example, as a result of increased intraspecific competition for food. We used combined chemical tracers to examine the diet of lobsters in fished and reserve areas in 2 bioregions in eastern Tasmania. δ 15 N values of lobsters were richer in fished than in reserve areas, indicating that lobsters eat a greater proportion of food items from higher trophic levels in fished areas. Mixing models suggest that ascidians, sea urchins and the turbinid gastropod were all important food sources for lobsters, but the importance of these food items differed between bioregions. This spatial variability may suggest that the small size of the reserve in one bioregion is inadequate at ensuring the diet of lobsters is protected from fishing pressure. Fatty acid profiles of lobsters supported the importance of these food sources to lobsters. Differences between bioregions, or inside and outside of reserves, were not apparent using fatty acids. The present study highlights that lobster fishing has the capacity to alter the trophic status of prey for generalist predators and suggests that fatty acid analyses may be limited in detecting changes in the dietary composition of such generalist feeders. KEY WORDS: Effects of fishing · Food webs · Marine protected areas · Stable isotopes · Fatty acids Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 388: [169][170][171][172][173][174][175][176][177][178][179][180][181][182][183][184] 2009 lishment of marine reserves in which complete cessation of fishing is enforced (Edgar & Barrett 1997, Shears et al. 2006. Increases in the abundance of J. edwardsii have been linked with trophic cascades in reserves that shifted from sea urchin-to algal-dominated reef habitats (Shears & Babcock 2003). What remains unclear, however, is the potential dietary shift of lobsters due, in part, to greater lobster density after reserve establishment (e.g. via intraspecific competition) that may have unknown effects on other components of the reef community.Chemical tracers such as stable isotope and fatty acid analyses are means by which the diet of lobsters in fished and reserve areas may be determined. As lobsters macerate their food upon ingestion, the chemical tracer approach has advantages over conventional methods of dietary analysis, such as gut content analysis where identification is often labour intensive, requires taxonomic expertise and soft bodied organisms may be overlooked (Sheppard & Harwood 2005). Moreover, chemical tracers identify food that is assimilated over a period of time and is of nutritional importance, rather than that which is ingested at one point in time (Thomas & Cahoon 1993). The basis of the chem...

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“…For example, C. elegans accumulate lipids mostly in their intestinal, as well as skin-like, epidermal cells (Nelson et al, 2002;Mullaney and Ashrafi, 2009;O'Rourke et al, 2009). The fataccumulating organ is much more developed and specialized in arthropods, especially in insects.…”

Section: Specification Of Lipid-storing Cell Types In Metazoamentioning

confidence: 99%

A comparative perspective on lipid storage in animals

Birsoy

Festuccia

Laplante

2013

Journal of Cell Science

128

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SummaryLipid storage is an evolutionary conserved process that exists in all organisms from simple prokaryotes to humans. In Metazoa, longterm lipid accumulation is restricted to specialized cell types, while a dedicated tissue for lipid storage (adipose tissue) exists only in vertebrates. Excessive lipid accumulation is associated with serious health complications including insulin resistance, type 2 diabetes, cardiovascular diseases and cancer. Thus, significant advances have been made over the last decades to dissect out the molecular and cellular mechanisms involved in adipose tissue formation and maintenance. Our current understanding of adipose tissue development comes from in vitro cell culture and mouse models, as well as recent approaches to study lipid storage in genetically tractable lower organisms. This Commentary gives a comparative insight into lipid storage in uni-and multi-cellular organisms with a particular emphasis on vertebrate adipose tissue. We also highlight the molecular mechanisms and nutritional signals that regulate the formation of mammalian adipose tissue.

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Comparison of growth and lipid composition in the green abalone, Haliotis fulgens, provided specific macroalgal diets

Cited by 93 publications

References 51 publications

High Levels of Icosapentaenoic Acid in the Lipids of Oyster Crassostrea gigas Ranging over Both Japan and France

High Levels of Icosapentaenoic Acid in the Lipids of Oyster Crassostrea gigas Ranging over Both Japan and France

Trophic effects of fishing southern rock lobster Jasus edwardsii shown by combined fatty acid and stable isotope analyses

A comparative perspective on lipid storage in animals

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