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- W1971754429 abstract "We traced the incorporation of fatty acid biomarkers into Calanus glacialis Jaschnov (CV) during a long-term incubation experiment using bacterivorous dinoflagellates and diatoms as food. Copepods fed Oxyrrhis marina Dujardin during a 3-week acclimation period developed an omnivorous lipid composition, relative to wild-captured copepods, characterized by significant losses of polyunsaturated fatty acids (PUFA) and diatom fatty acids [16:4(n−1), 20:5(n−3)], and increases in saturated fatty acids (SFA) and 18:1(n−7). Levels of a wax ester-based omnivory index [unsaturation coefficient (UC)], verified by gas chromatography (GC), also decreased in response to the relatively PUFA-poor dinoflagellate. After half of the copepods were switched to a diet comprised of the diatom Thalassiosira hispida Syvertsen (PUFA-rich), the data showed reversal to a more herbivorous lipid composition (increases in UC and relative amounts of PUFA and diatom fatty acids). We assert that UC, derived from routine thin-layer chromatography analysis (Iatroscan) can quickly determine in situ feeding strategies (i.e., degree of omnivory) of wax ester-storing copepods. None of the eight odd and/or branched fatty acids (OBFA) initially detected in C. glacialis increased in response to a diet of O. marina which was rich in these compounds [mainly iso (i)-15:0 and anteiso (ai)-15:0]. Lack of transfer of these and other fatty acids [e.g., 22:6(n−3)] could be related to the physiological state of the copepods (early diapause). We suggest that the bacterial fatty acid 18:1(n−7) may be more useful in inferring connections between Calanus spp. and the microbial food web than the odd and/or branched chains." @default.
- W1971754429 created "2016-06-24" @default.
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- W1971754429 date "2004-06-01" @default.
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- W1971754429 title "Incorporation of bacterial fatty acids and changes in a wax ester-based omnivory index during a long-term incubation experiment with Calanus glacialis Jaschnov" @default.
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- W1971754429 doi "https://doi.org/10.1016/j.jembe.2003.11.008" @default.
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