Fatty-Acid and Stable-Isotope Compositions in Shallow-Water Bivalve Mollusks and their Food
- 19 Downloads
We conducted a comparative analysis of the fatty acid (FA) composition and the ratios of stable isotopes of carbon (δ13C) and nitrogen (δ15N) in soft tissues of ten species of bivalve mollusks collected simultaneously on adjacent biotopes in shallow Vostok Bay (the Sea of Japan). Comparison of the FA composition of the lipids of digestive gland and all soft tissues showed that the percentages of C16 and C18 marker FAs were greater in the digestive gland and the levels of marker C20 and C22 FAs were, in most cases, higher in soft tissues. According to the results of cluster analysis and principal component analysis, four groups of samples were identified with a similarity of the FA composition of more than 80% within groups. The carbon stableisotope ratios varied within very wide limits in the studied species of bivalves; the range of δ13C variations was 8.1‰. The range of δ15N variations was much smaller, 2.5‰. Two pairs of species of mollusks (Saxidomus purpurata–Protothaca euglypta and P. jedoensis–Diplodonta semiasperoides) did not differ in the values of both δ15N and δ13C, the remaining species differed in at least one of these parameters. The greatest similarity of the FA composition and stable-isotope ratios was found in species that inhabit similar substrates, except Macoma irus and D. semiasperoides. Particularly marked differences in the FA composition and stable-isotope ratios were found between a filter-/surface deposit-feeder M. irus and filter-feeders Arca boucardi and Mytilus coruscus that live next to this species.
Keywordsbivalves fatty acids stable isotopes sestonophages Vostok Bay Sea of Japan
Unable to display preview. Download preview PDF.
- 1.Kuznetsov, A.P., On detritus feeding and seston feeding in the class Bivalvia, in Pitanie morskikh bespozvonochnykh v estestvennykh usloviyakh (Feeding of Marine Invertebrates Under Natural Conditions), Moscow: Inst. Okeanol., Akad. Nauk SSSR, 1986, pp. 6–10.Google Scholar
- 5.Kharlamenko, V.I., Kiyashko, S.I., Rodkina, S.A., and Svetashev, V.I., The composition of fatty acids and stable isotopes in the detritophage Acila insignis (Gould, 1861) (Bivalvia: Nuculidae): searching for markers of a microbial food web, Russ. J. Mar. Biol., 2011, vol. 37, no. 3, pp. 201–208.CrossRefGoogle Scholar
- 7.Tsikhon-Lukanina, E.A., Trofologiya vodnykh mollyuskov (Trophology of Aquatic Mollusks), Moscow: Nauka, 1987.Google Scholar
- 8.Ackman, R.G., Fatty acid metabolism of bivalves, in Biochemical and Physiological Approaches to Shellfish Nutrition, Second Int. Conf. Aquacult. Nutr., Baton Rouge: World Mariculture Soc. Spec. Publ., 1983, pp. 358–376.Google Scholar
- 15.Delaporte, M., Soudant, P., Moal, J., et al., Incorporation and modification of dietary fatty acids in gill polar lipids by two bivalve species Crassostrea gigas and Ruditapes philippinarum, Comp. Biochem. Physiol., Part A: Mol. Integr. Physiol., 2005, vol. 140, no. 4, pp. 460–470.CrossRefGoogle Scholar
- 22.Napolitano, G.E. and Ackman, R.G., Fatty acid dynamics in sea scallops Placopecten magellanicus (Gmelin, 1791) from Georges bank, Nova Scotia, J. Shellfish Res., 1993, vol. 12, no. 2, pp. 267–277.Google Scholar
- 29.Sargent, J.R., Parkes, R.J., Mueller-Harvey, I., et al., Lipid biomarkers in marine ecology, in Microbes in the Sea, 1987, Chichester: Horwood, pp. 119–138.Google Scholar
- 31.The LipidWeb, Mass spectrometry of fatty acid derivatives, 2017. http://www.lipidhome.co.uk/ms/masspec.html.
- 32.Wang, S.K., Jin, B.S., Qin, H.M., et al., Trophic dynamics of filter feeding bivalves in the Yangtze estuarine intertidal marsh: Stable isotope and fatty acid analyses, PLoS One, 2015, vol. 10, no. 8, p.21.Google Scholar
- 33.Zhao, L.Q., Yang, F., and Yan, X.W., Stable isotopes and fatty acids as dietary tracers of intertidal bivalves, Fish. Sci. (Tokyo, Jpn.), 2013, vol. 79, no. 5, pp. 749–756.Google Scholar