کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1974778 1060381 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fatty acid composition of the amphipod Dikerogammarus villosus: Feeding strategies and trophic links
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Fatty acid composition of the amphipod Dikerogammarus villosus: Feeding strategies and trophic links
چکیده انگلیسی

Fatty acid (FA) compositions were determined for the invader amphipod Dikerogammarus villosus collected from July to September 2002, in an overheated, high-conductivity dammed reservoir in north-eastern France. Predominant fatty acids were the polyunsaturated fatty acids (PUFA): eicosapentaenoic acid (EPA), linoleic acid (LA), arachidonic acid (ARA), linolenic acid (LNA) together with the monounsaturated fatty acid 18:1ω9 and the saturated fatty acid 16:0. FA markers indicated that available food was constituted of incompletely degraded phytodetritus and terrestrial inputs, as well as animal remains. PUFA contents depended on the diet and the capacity of animals to desaturate and elongate LNA and LA in long chain PUFA as EPA and ARA respectively. Based on their FA compositions, we showed that gammarids represent naturally-occurring freshwater sources of essential PUFA, and could play a fundamental role in pelagic–benthic coupling and energy recycling in the ecosystem. The complexity of the feeding strategies of D. villosus — detritivorous, omnivorous, carnivorous — makes this species efficient at exploiting different components of the available food and may be a key factor in its high invasive success.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 147, Issue 4, August 2007, Pages 868–875
نویسندگان
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