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Differential d13C and d15N signatures among scallop tissues: implications for ecology and physiology Lorrain, A.; Paulet, Y.-M.; Chauvaud, L.; Savoye, N.; Donval, A.; Saout, C. (2002). Differential d13C and d15N signatures among scallop tissues: implications for ecology and physiology. J. Exp. Mar. Biol. Ecol. 275(1): 47-61. dx.doi.org/10.1016/S0022-0981(02)00220-4 In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 103880 [ download pdf ]

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Trefwoorden

Aquatic organisms > Heterotrophic organisms > Filter feeders Behaviour > Feeding behaviour Bioenergetics Biology > Physiology > Ecophysiology Biomarkers Chemistry > Biochemistry > Histochemistry Composition > Biochemical composition Energy budget Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine molluscs Isotopes > Carbon isotopes Isotopes > Nitrogen isotopes Temporal variations > Periodic variations > Seasonal variations Pecten maximus (Linnaeus, 1758) [WoRMS] ANE, France, Brittany, Brest Bay [Marine Regions] Marien/Kust

Author keywords

d13C; d15N; Diet; Metabolite fates; Scallops; Tracers

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Auteurs		Top
Lorrain, A. Paulet, Y.-M. Chauvaud, L.	Savoye, N. Donval, A. Saout, C.

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Abstract

There have been several studies where the isotopic composition of organisms has been determined seasonally, but fewer have examined separate organs. In this context, separate organs (e.g. gonad, digestive gland and muscle) of a suspension-feeder, the scallop Pecten maximus, were used to assess seasonal changes of both stable isotopes and biochemical components. Our study used multiple indicators [stable carbon and nitrogen isotope ratios, biochemical components and seston chlorophyll-a (chl a)] to track nutritive activity and energy allocation in P. maximus from the Bay of Brest (France). In addition to seasonal variation in the isotopic composition of P. maximus tissues, we found strong differences in the mean isotopic signatures of different organs. This has serious implications for interpretation of animal diets and potential use in animal physiology. Furthermore, we present evidence that seasonal variations of metabolism will cause changes in the isotopic composition not related to changes in the diet. Interpretation of isotopic data may require consideration of values from several separate organs. Finally, d15N appears powerful to track metabolite fates in the scallop P. maximus.

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