<i>trans</i>‐6‐Hexadecenoic acid in the Atlantic leatherback<i>Dermochelys coriacea coriacea</i>L. and other marine turtles

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

doi:10.1007/bf02531459

Cited by 25 publications

(7 citation statements)

References 20 publications

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“…In a previous study cis 16: lo10 did not appear in this position in G.L.C. analyses on butanediol-succinate (2). The identity of this acid is not known at the time of writing, but cis 16 : 1 w l l is suspected.…”

Section: Monoetkzylenic Acidsmentioning

confidence: 78%

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

Ackman¹,

Hooper²,

Hingley³

1972

Can. J. Biochem.

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ACKMAN, R. G., HOOPEX, S. N., and HINGLBY, J. The harbor seal Phoccm tsitulirma concolor De Kay: comparative details of fatty acids im lung and heart phospholipids and triglycerides. Can. J. Bioehem. 50, 833-838 (1 072). The fatty acids of phospholipids and of triglycerides from the lungs and heart of the harbor seal Phoca aritulina concolor De Kay show distinctive differences from the depot (blubber) fat. Primarily, this is due to greatly elevated levels of 20: 4d5 in the phospholipids. Although these have about the same total C,, and C,, pslyethylenic acids wiah five and six double bonds as the depot fat, they occur in different proportions emphasizing 24): 5 0 3 rather than 22:603. The organ triglycerides resemble the phospholipids in saturated fatty acid composition and the depot fats in monoethylenic fatty acid composition, but have remarkably low levels of 28: 5~3 , 2 2 : 5m3, and 22: 6 0 3 compared to the depot fat, Comparisons are made with phospholipids from the lungs of the leatherback turtle DermocBzelys coriacea coriacea Linnaeus but the novel trans-6hexadmnoic acid found in the turtle Iipids could not be detected in the seal lipids. AGKMAN, R. G., HWPER, S. N., et HINGLEY, J. The harbor seal Phoca vitulim concolor De Kay : comparative details of fatty acids in lung and heart phospholipids and triglycerides. Can. J. Bioehem. 50, 833-838 (1972). El exisk des diffkrences caractkristiques entre les acides gras des graisses de reserve et ceux des phospholipides et des tri@y&rides extraits des poumons et du CQUP du phoque commun (veau marin), Phoca om'tuiilaa conolor De Kay. Ces differences sont d7abord dues au taux t r k eleve des 28: 406 dans les phospholipides. Bien qu'on y renmwtre a peu p r b la m?me quantite totale d'acides polyethhiques (C,, et C,,) a cinq et six doubles liaisons que dans les graism de aberve, la proportion des 20:503 y est plus elevke que celle des 22: &3. La composition en acids gras saturQ des triglydrides de ces organa ressemble a celle des phospholipides et Ieur composition en acides gras monoetheniques, a celle des graisses de rberve. Ils ont cependant des quantitks remarquablement faibles de 20: So3, de 22: 503 et de 22: 603 compares aux graisses de rberve.Nous comparons ces teneurs A cell-des phospholipides des poumons de la tortue a cuir Dermochelys coriacea coriacea Linnaeus. Nous nm'avons pu dkceler dans les lipides du phoque commun ce nouvel acide trans-6-hexadk6noique trouve dans les lipides de la tortue.

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Section: Monoetkzylenic Acidsmentioning

confidence: 78%

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

Ackman¹,

Hooper²,

Hingley³

1972

Can. J. Biochem.

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“…Thus the presence of these fatty acids in both leatherback turtles and ocean sunfish was taken as an indicator of a diet containing jellyfish (Ackman 1997). The role of jellyfish in the diet of M. mola remains unclear, however, since the study that identified trans-6-hexadecenoic acid in D. coriacea also identified it in two other turtle species: the loggerhead Caretta caretta and Kemp's Ridley Lepidochelys kempii (Hooper and Ackman 1970), both of which are omnivorous, not obligate feeders on jellyfish (Bjorndal 1997). A proposed link between these fatty acids and predation on jellyfish becomes less certain when subsequent studies also identified both fatty acids in the liver oil of the reef-dwelling Atlantic spadefish Chaetodipterus faber (Pearce and Stillway 1976) and 7-methyl-7-hexadecenoic acid as a constituent of sperm whale oil (Pascal and Ackman 1975).…”

Section: Dietmentioning

confidence: 97%

“…Trans-6-hexadecenoic acid was known to comprise 2% of the total fatty acids in the moon jellyfish Aurelia aurita (Hooper and Ackman 1972). In addition, both of these fatty acids had previously been isolated from tissues of the leatherback turtle, Dermochelys coriacea (Hooper and Ackman 1970), an animal known to be an obligate gelatinous zooplanktivore (Houghton et al 2006c). Thus the presence of these fatty acids in both leatherback turtles and ocean sunfish was taken as an indicator of a diet containing jellyfish (Ackman 1997).…”

Section: Dietmentioning

confidence: 98%

The biology and ecology of the ocean sunfish Mola mola: a review of current knowledge and future research perspectives

Pope

Hays

Thys³

et al. 2010

Rev Fish Biol Fisheries

112

117

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Relatively little is known about the biology and ecology of the world's largest (heaviest) bony fish, the ocean sunfish Mola mola, despite its worldwide occurrence in temperate and tropical seas. Studies are now emerging that require many common perceptions about sunfish behaviour and ecology to be re-examined. Indeed, the long-held view that ocean sunfish are an inactive, passively drifting species seems to be entirely misplaced. Technological advances in marine telemetry are revealing distinct behavioural patterns and protracted seasonal movements. Extensive forays by ocean sunfish into the deep ocean have been documented and N. Queiroz broad-scale surveys, together with molecular and laboratory based techniques, are addressing the connectivity and trophic role of these animals. These emerging molecular and movement studies suggest that local distinct populations may be prone to depletion through bycatch in commercial fisheries. Rising interest in ocean sunfish, highlighted by the increase in recent publications, warrants a thorough review of the biology and ecology of this species. Here we review the taxonomy, morphology, geography, diet, locomotion, vision, movements, foraging ecology, reproduction and species interactions of M. mola. We present a summary of current conservation issues and suggest methods for addressing fundamental gaps in our knowledge.

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“…The giant ocean sunfish Mola mola Hooper er al. 1973), the even larger leatherback turtle Demchelys coriacea coriacea (Hooper and Ackman 1970) and the spadefish Chaetodiptents faber (Pearce and Stillway 1976) all accumulate trans-6-hexadecenoic acid from jellyfish. Green turtles Chelonia mydas are herbivores in the Caribbean (Joseph er al.…”

Section: Trans Acids I N Bacteriamentioning

confidence: 99%

HAS EVOLUTION AND LONG‐TERM COEXISTENCE ADAPTED US TO COPE WITH TRANS FATTY ACIDS?

Ackman

1997

Journal of Food Lipids

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Dietitians, nutritionists, and the fats and oils industry have all apparently succumbed to the near‐panic generated by reports that hydrogenated fats containing trans acids will alter the HDL/LDL cholesterol ratio in human blood lipids in a way presumed to create a greater risk of heart attacks. The fact that bacterial and plant trans fatty acids have always been a part of the diets and biochemistry of the lower animals that evolved over billions of years into humans, at least several million years ago, is ignored. In terms of evolution we actually followed the same diets until very recently, with ruminant fats regularly contributing up to 5%trans acids in the fats eaten by hunters and later in foods for most agriculturists. The Canadian beaver living on a diet rich in cellulose, has recently been discovered to deposit trans acids in its depot fats. The proposed increase in fiber in our diets may similarly change our intestinal microflora and create more trans acids. Are they absorbed? Are they really hazardous? Are all these sudden changes in dietary recommendations really necessary when the lifespan of the well‐fed western peoples steadily increases?

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trans‐6‐Hexadecenoic acid in the Atlantic leatherbackDermochelys coriacea coriaceaL. and other marine turtles

Cited by 25 publications

References 20 publications

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

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

The biology and ecology of the ocean sunfish Mola mola: a review of current knowledge and future research perspectives

HAS EVOLUTION AND LONG‐TERM COEXISTENCE ADAPTED US TO COPE WITH TRANS FATTY ACIDS?

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