The Harbor Seal <i>Phoca vitulina concolor</i> De Kay: Comparative Details of Fatty Acids in Lung and Heart Phospholipids and Triglycerides

Ackman, R. G.; Hooper, S. N.; Hingley, J.

doi:10.1139/o72-115

Cited by 16 publications

(14 citation statements)

References 3 publications

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“…Seal milk is remarkably rich in fat ( > 50%) and therefore fat transfer from dam to pup is very rapid (Jangaard and Ke 1968;Ackman et al 1972;Addison and Brodie 1977). The pups show an apparent increase in blubber thickness and in blubber fat content for stages 1 through 3, and the dams may show a corresponding reduction in blubber thickness although not in blubber fat content (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…Mention was included in a survey of Nova Scotia commercial seal oils produced largely from young harp seals, Pagophilus groenlandica (Ackman et al 1971), and in other papers on North Atlantic seal fats (Jangaard and Ke 1968;Ackman et al 1972;Ackman and Hooper 1974), extending our observations to a few Atlantic harbour (Phoca vitulina vitulina) and grey (Halichoerus grypus) seals.…”

Section: Introductionmentioning

confidence: 99%

“…The total lipid was recovered from the tissues by CHCl, -MeOH extraction and recorded (Table 1). Fatty acid methyl ester analyses by gas -liquid chromatography ( Table 2) followed procedures published earlier (Ackman et al 1972;Ackman and Hooper 1974).…”

Section: Introductionmentioning

confidence: 99%

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n – 3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health

Ackman¹,

Eaton²

1988

Can. J. Zool.

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ACKMAN, R. G., and EATON, C. A. 1988. n -3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health. Can. J. Zool. 66: 24.28-243 1. n-3 Docosapentaenoic acid (22:5n -3) is shown to constitute as much as 6 % of the total fatty acids in six sets of dam-pup blubber samples from grey seals, Halichoerus grypus. Relative to fish oils, this fatty acid is several times more plentiful in the seal fats that form an important part of Inuit diets. Consideration of intakes of a-3 fatty acids as therapeutic agents for cardiovascular and other health disorders in man should include this quantitatively important fatty acid of seal fats. ACKMAN, R. G., et EATON, C. A. 1988. n -3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health. Can. J. Zool. 66 : 2428-2431. L'acide n-3 docosapentaenoi'que (22:5n -3) constitute au moins 6 % du contenu total en acides gras dans six series d'echantillons de lard de mkres -petits chez le Phoque gris (Halichoerus grypus). Cet acide est beaucoup plus abondant dans les graisses des phoques, qui constituent une fraction importante du regime alimentaire des Inuits, que dans les huiles des poissons. Si les acides gras a-3 peuvent effectivement servir d'agents therapeutiques dans les cas de maladies cardio-vasculaires ou autres chez l'homme, il faudrait songer a inclure, parmi ces agents, cet acide gras trks abondant des graisses du phoque.[Traduit par la revue] IntroductionMaterials and methods The current interest in EPA (eicosapentaenoic acid; 20:5n -3) and DHA (docosahexaenoic acid; 22:6n -3) in human nutrition arose from observations on the diets of Greenland Inuit (Bang and Dyerberg 1976) in which seal blubber was shown to be an important component. Later EPA was singled out as a fatty acid with unique and possibly highly desirable therapeutic benefits in human cardiovascular problems (Dyerberg et al. 1978). Recently von Schacky and Weber (1985) have also indicated that DPA (the n -3 isomer of docosapentaenoic acid; 22:5n-3) is an intermediate between EPA and DHA, which is active in man.In our opinion the remarkably high proportion of DPA in seal fats has not received the attention it deserves. Mention was included in a survey of Nova Scotia commercial seal oils produced largely from young harp seals, Pagophilus groenlandica (Ackman et al. 1971), and in other papers on North Atlantic seal fats (Jangaard and Ke 1968;Ackman et al. 1972;Ackman and Hooper 1974), extending our observations to a few Atlantic harbour (Phoca vitulina vitulina) and grey (Halichoerus grypus) seals.The role of DPA in human health may become more important as efforts are made to compare the epidemiological data for Inuit health with the absence of specific diseases (Simopoulos et al. 1986) and thus to suggest therapeutic doses with fish oil or fish oil concentrates. In the latter oils, DPA is a relatively minor component, usually 1 -2 % of total fatty acids in natural f...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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n – 3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health

Ackman¹,

Eaton²

1988

Can. J. Zool.

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“…Although data exist concerning the biology, behavior and feeding habits of the Mediterranean monk seal (4), the lipid composition of its tissues has not been reported previously. In contrast, a substantial amount of information is available concerning the fatty acid composition of commercial oils, as well as tissue and milk lipids from several species of seals from Arctic and temperate waters (5)(6)(7)(8)(9)(10)(11)(12). Most previous studies of seal lipids have concentrated on the total lipids from blubber, while the lipid composition of other tissues has not been examined in detail.…”

Section: Lipids 29 577-582 (1994)mentioning

confidence: 99%

The lipid composition of selected tissues from a Mediterranean monk seal,Monachus monachus

Henderson

Kalogeropoulos

Alexis

1994

Lipids

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The lipid composition of blubber, brain, muscle and heart from a Mediterranean monk seal Monachus monachus (an endangered species) were examined to allow comparisons with more common species of seals. Only neutral lipids (mainly triacylglycerols) were detectable in the blubber lipids, whereas polar lipids predominated in the heart and in the brain. Neutral and polar lipids comprised almost equal proportions in both liver and muscle. Choline glycerophospholipids (CGP) were the major polar lipids, followed by ethanolamine glycerophospholipids (EGP) in the liver, heart and muscle. Cerebrosides accounted for 28.8% of the brain lipids. All lipid classes of the liver contained high levels (31-47%) of polyunsaturated fatty acids (PUFA), with the exception of phosphatidylserine. The total proportion of n-6 PUFA exceeded that of n-3 PUFA in all lipid classes of the liver, due mainly to the high levels of 20:4n-6. The highest level of 20:4n-6 occurred in phosphatidylinositol, where it comprised 32.4% of the total fatty acids. The CGP and EGP of the brain contained lower levels of PUFA than those of the liver, muscle and heart. Alkenyl ethers accounted for 35.8% of the total long-chain moieties in brain EGP. The fatty acid composition of blubber triacylglycerols differed from those of the lipid classes from other tissues in that it had a very low ratio of n-6 to n-3 PUFA (0.3) as a result of a lower content of 20:4n-6.

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“…40-90°) require that many marine organisms store energy in the form of fat, the extremes being the marine mammals, where the same fat deposits can have functions other than just for energy storage (13)(14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

Seafood lipids and fatty acids

Ackman

1990

Food Reviews International

117

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The consumer is very inadequately informed on seafood composition because of variable fat levels in some species, confusion in species nomenclature, failure to recognize the increasing proportion of imports, influence of aquaculture practices, and the actual fish contents of convenience foods. Concerns about safety considerations are primed by the controversy between advocates of fish as food and marketers of fish oil concentrates in capsules. There are in fact very few problems with fish and shellfish, when these are carefully inspected, or with fish oil concentrates, which are prepared from highly purified natural materials. The bioavailability of different forms of omega-3 fatty acids attached to glycerol, or sold as ethyl esters or free fatty acids, must be addressed.Therefore, the absorption and distribution in the body of various forms of omega-3 fatty acids is outlined.

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The Harbor Seal Phoca vitulina concolor De Kay: Comparative Details of Fatty Acids in Lung and Heart Phospholipids and Triglycerides

Cited by 16 publications

References 3 publications

n – 3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health

n – 3 Docosapentaenoic acid in blubber of dam and pup grey seals (Halichoerus grypus): implications in the Inuit diet and for human health

The lipid composition of selected tissues from a Mediterranean monk seal,Monachus monachus

Seafood lipids and fatty acids

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