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Polyunsaturated fatty acids in fishes increase with total lipids irrespective of feeding sources and trophic position
- Source :
- Ecosphere, Ecosphere, Ecological Society of America, 2017, ⟨10.1002/ecs2.1753⟩, Ecosphere, Vol 8, Iss 4, Pp n/a-n/a (2017)
- Publication Year :
- 2017
-
Abstract
- Source at https://doi.org/10.1002/ecs2.1753 . Trophic transfer and retention of dietary compounds are vital for somatic development, reproduction, and survival of aquatic consumers. In this field study, stable carbon and nitrogen isotopes, and fatty acids (FA) contents in invertebrates and fishes of pre-alpine Lake Lunz, Austria, were used to (1) identify the resource use and trophic level of Arctic charr (Salvelinus alpinus), pike (Esox lucius), perch (Perca fluviatilis), brown trout (Salmo trutta), roach (Rutilus rutilus), and minnow (Phoxinus phoxinus) and (2) examine how polyunsaturated fatty acids (PUFA; i.e., omega-3 and -6 PUFA) are related to total lipid status, littoral–pelagic reliance, and trophic position. Stable isotope data suggest that pike, perch, and minnow derived most of their energy from littoral resources, but minnows differed from pike and perch in their trophic position and PUFA composition. The co-occurrence of cyprinids, percids, and pike segregated these fishes into more lipid-rich (roach, minnow) and lipid-poor (pike, percids) species. Although the relatively lipid-poor pike and percids occupied a higher trophic position than cyprinids, there was a concurrent, total lipid-dependent decline in omega-3 and -6 PUFA in these predatory fishes. Results of this lake food-web study demonstrated that total lipids in fish community, littoral–pelagic reliance, and trophic position explained omega-3 and -6 PUFA in dorsal muscle tissues. Omega-3 and -6 PUFA in these fishes decreased with increasing trophic position, demonstrating that these essential FAs did not biomagnify with increasing trophic level. Finally, this lake food-web study provides evidence of fish community-level relationship between total lipid status and PUFA or stable isotope ratios, whereas the strength of such relationships was less strong at the species level.
- Subjects :
- 0106 biological sciences
[SDV]Life Sciences [q-bio]
salmonid
stable isotopes
Biology
010603 evolutionary biology
01 natural sciences
fatty acids
trophic biomarker
CARBON
biology.animal
lcsh:QH540-549.5
STABLE-ISOTOPES
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470
Special Feature: Biomarkers in Trophic Ecology
14. Life underwater
Ecology, Evolution, Behavior and Systematics
Esox
ComputingMilieux_MISCELLANEOUS
Trophic level
Pike
computer.programming_language
Perch
Ecology
010604 marine biology & hydrobiology
NICHE
PATHWAYS
Minnow
MUSCLE
biology.organism_classification
LAKE
Food web
VDP::Mathematics and natural science: 400::Basic biosciences: 470
cyprinid
percid
MODEL
Phoxinus
HABITATS
1181 Ecology, evolutionary biology
GROWTH
lipids (amino acids, peptides, and proteins)
lcsh:Ecology
Rutilus
FOOD-WEB
computer
Subjects
Details
- Language :
- English
- ISSN :
- 21508925
- Database :
- OpenAIRE
- Journal :
- Ecosphere, Ecosphere, Ecological Society of America, 2017, ⟨10.1002/ecs2.1753⟩, Ecosphere, Vol 8, Iss 4, Pp n/a-n/a (2017)
- Accession number :
- edsair.doi.dedup.....4a98f877ca98530d7165e6fa349f30bd