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- W3147209919 startingPage "1" @default.
- W3147209919 abstract "We analyzed Arctic char (Salvelinus alpinus (Linnaeus, 1758)) stable isotope ratios and fatty acid composition from two geographically proximal Nunavut lakes, Qasigiyat and Iqalugaarjuit, to determine if anadromous and resident Arctic char occupied different trophic niches. Resident Arctic char had lower δ 13 C and δ 34 S, indicative of freshwater feeding, compared with anadromous individuals. Significantly lower δ 15 N of residents suggests the ecotypes feed at different trophic levels. Significantly wider δ 13 C and δ 15 N ranges in residents implied a broader trophic niche or a wider range in baseline prey isotope values. Results also provide further evidence for resident use of the estuarine environment in Qasigiyat. Immature Arctic char occupy a different trophic niche than both resident and anadromous fish within Iqalugaarjuit, but this relationship is less clear in Qasigiyat. Distinct stable isotope and fatty acid profiles indicate that resident and anadromous Arctic char have distinct trophic niches: marine for anadromous, freshwater for resident. Immature Arctic char seem to occupy a distinct niche from both anadromous and resident fish, which likely relates to use of both freshwater and estuarine environments, depending on developmental stage. We show the first evidence of the fatty acid differences and niche segregation between sympatric anadromous and resident ecotypes in Arctic char." @default.
- W3147209919 created "2021-04-13" @default.
- W3147209919 creator A5079529631 @default.
- W3147209919 creator A5089252498 @default.
- W3147209919 date "2021-06-01" @default.
- W3147209919 modified "2023-09-24" @default.
- W3147209919 title "Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada" @default.
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- W3147209919 doi "https://doi.org/10.1139/as-2019-0039" @default.
- W3147209919 hasPublicationYear "2021" @default.