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Dufour Elise, Gerdeaux D., Wurster C. M. Whitefish (Coregonus lavaretus) respiration rate governs intra-otolith variation of delta C-13 values in Lake Annecy. Canadian Journal of Fisheries and Aquatic Sciences, 2007, 64 (12), p. 1736-1746. ISSN 0706-652X
doi:10.1139/F07-132| Titre | Whitefish (Coregonus lavaretus) respiration rate governs intra-otolith variation of delta C-13 values in Lake Annecy |
| Année de publication | 2007 |
| Type de document | Article référencé dans le Web of Science WOS:000252760000010 |
| Auteurs | Dufour Elise, Gerdeaux D., Wurster C. M. |
| Source | Canadian Journal of Fisheries and Aquatic Sciences, 2007, 64 (12), p. 1736-1746. ISSN 0706-652X |
| Résumé | We generated 10 high-resolution profiles of stable carbon and oxygen isotope values (delta C-13(oto) and delta O-18(oto)) of sagittal otoliths of whitefish (Coregonus lavaretus) from Lake Annecy (France) to determine the factors that control intra-individual delta C-13(oto) variation. Dominant patterns of intra-otolith variation compared well with seasonal and age-specific respiration modeling. Conversely, intra-otolith variation of delta C-13 values did not compare well with measured dietary and environmental variation. We infer that the proportion of metabolically sourced carbon (M) is the dominant control on intra-otolith variation. Current models of otolith carbon incorporation provide different estimates of M. Once appropriate fractionation factors among otolith, endolymph, blood, and carbon sources are elucidated, delta C-13(oto) values will reveal energetic, environmental, and dietary information of teleost fish for past and present populations. Used in conjunction with delta O-18(oto) values, delta C-13(oto) values will be powerful proxies of fish environment, behavior, and evolution. |
| Plan de classement | 034 |
| Localisation | Fonds IRD |
| Identifiant IRD | PAR00002188 |
| Lien permanent | http://www.documentation.ird.fr/hor/PAR00002188 |
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