Changes in Sediment Fatty Acid Composition during Passage through the Gut of Deposit Feeding Holothurians: Holothuria atra (Jaeger, 1883) and Holothuria leucospilota (Brandt, 1835)

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dc.contributor.authorMfilinge, Prosper L.
dc.contributor.authorTsuchiya, Makoto
dc.date.accessioned2016-07-08T11:52:03Z
dc.date.available2016-07-08T11:52:03Z
dc.date.issued2016
dc.description.abstractSea cucumbers Holothuria atra and Holothuria leucospilota play an important role in the bioturbation of sediment in coral reef and rocky intertidal ecosystems. This study investigated changes in sediment fatty acid (FA) composition during gut passage in H. atra and H. leucospilota. The FA composition did not differ significantly between species. Comparison of FA composition in ambient sediment (AS), foregut (FG), midgut (MG), hindgut (HG), and faecal pellets (FPs) indicated that marked changes in FA composition occurred during passage through the gut of H. atra and H. leucospilota. Saturated fatty acids (SAFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), and branched fatty acids (BrFAs) were significantly higher in FG than in AS, suggesting that both species selectively ingested nutrient rich particles. Significant reduction of SAFAs, MUFAs, PUFAs, and BrFAs occurred in MD and HD, with complete elimination of most PUFAs in FPs. A decrease in PUFAs 20:5 ω 3, 18:4 ω 3, 22:5 ω 3, 22:6 ω 3, 18:2 ω 6, 18:3 ω 3, 18:3 ω 6, odd-numbered BrFAs, and MUFA 18:1 ω 7 indicated that algal detritus and bacteria were important part of diet. These results have implications for the fate of specific dietary FAs, especially ω 3 and ω 6, and the contribution holothurian FPs make to the FA composition of coral reef and rocky intertidal ecosystems.en_US
dc.identifier.citationMfilinge, P.L. and Tsuchiya, M., 2016. Changes in Sediment Fatty Acid Composition during Passage through the Gut of Deposit Feeding Holothurians: Holothuria atra (Jaeger, 1883) and Holothuria leucospilota (Brandt, 1835). Journal of lipids, 2016.en_US
dc.identifier.doi10.1155/2016/4579794
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2857
dc.language.isoenen_US
dc.publisherHindawi Publishing Corporationen_US
dc.titleChanges in Sediment Fatty Acid Composition during Passage through the Gut of Deposit Feeding Holothurians: Holothuria atra (Jaeger, 1883) and Holothuria leucospilota (Brandt, 1835)en_US
dc.typeJournal Article, Peer Revieweden_US
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