Influence of Dietary Fat Source on the Body Fat Composition of Mink (<i>Mustela vison</i>) and Blue Fox (<i>Alopex lagopus</i>)

Rouvinen, Kirsti; Kiiskinen, Tuomo

doi:10.1080/00015128909438520

Cited by 53 publications

(32 citation statements)

References 13 publications

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“…Although further studies are needed, current evidence indicates that effects of short-term fasting are unlikely to have major impacts on overall FA composition. In summary, although biosynthesis and modification of FA does occur, by far the greatest quantitative contribution to the fat stores of higher marine or aquatic predators arises from direct deposition of dietary FA (Ackman and Eaton 1966 ;Rouvinen and Kiiskinen 1989 ;Colby et al 1993 ;Iverson 1993 ;Kirsch et al 1998 ;Iverson et al , 2007 .…”

Section: Digestion Modification and Deposition Of Dietary Lipids Anmentioning

confidence: 99%

Tracing aquatic food webs using fatty acids: from qualitative indicators to quantitative determination

Iverson

2009

Lipids in Aquatic Ecosystems

201

281

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Section: Digestion Modification and Deposition Of Dietary Lipids Anmentioning

confidence: 99%

Tracing aquatic food webs using fatty acids: from qualitative indicators to quantitative determination

Iverson

2009

Lipids in Aquatic Ecosystems

201

281

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“…Since the advent of modern gas-liquid chromatography and high-resolution capillary columns, reports on detailed fatty acid compositions in various animal tissues have accumulated showing that the fatty acid composition of predator tissues are affected by dietary fatty acids (Rouvinen & Kiiskinen 1989, Käkelä & Hyvärinen 1996, Käkelä et al 2001, Dahl et al 2003, Iverson et al 2004. The fatty acid composition of storage so-called neutral lipids is normally closer to the ingested mixture of fatty acids than the composition of structural lipids.…”

Section: Introductionmentioning

confidence: 99%

Fatty acid signatures in plasma of captive herring gulls as indicators of demersal or pelagic fish diet

Käkelä

Käkelä²,

Kahle³

et al. 2005

Mar. Ecol. Prog. Ser.

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Current fishing practices provide scavenging seabirds with discarded demersal fish. In order to study the impact of fishery management measures and alterations in the availability of discards on seabird populations, accurate information on the birds' diet is essential. Studies of pellets and prey remains provide a biased picture and tend to be limited to seabird breeding seasons. Studying biochemical markers in bird tissues can complement other methods. In this study, captive herring gulls Larus argentatus were fed alternating diets of North Atlantic demersal and pelagic fish, and changes in the fatty acid signatures (FAS) of the birds' plasma were followed. The large differences in FAS of demersal and pelagic fish caused several clearly detectable differences in the plasma FAS of the gulls fed on these fish. A change from demersal to pelagic fish or vice versa could be detected in plasma FAS within 5 d of switching the diet, and transient changes in the gull's nutritional status did not disturb the use of the FAS. Relatively high levels of branched-chain 17:0, 18:1n-7 and 20:4n-6 are indicative of a diet of demersal fish, and high levels of 14:0, 22:1n-11, 20:1n-9, 18:2n-6, 18:3n-3 and 18:4n-3 occur when gulls eat pelagic fish. These reference FAS can be used to estimate the importance of demersal and pelagic fish in the recent diet of scavenging seabirds.

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“…The use of signatures of fatty acid(s) (FA) is a relatively new method to evaluate diets of predators at the top of the food web based on the demonstrated influence of dietary FA on predator fat stores (Rouvinen & Kiiskinen 1989, Colby et al 1993, Raclot et al 1998. Diet is the primary source of many FA for most monogastric animals, which are subsequently incorporated into adipose tissue as triacylglycerols.…”

Section: Introductionmentioning

confidence: 99%

Evaluating quantitative fatty acid signature analysis (QFASA) using harbour seals Phoca vitulina richardsi in captive feeding studies

Nordstrom¹,

Wilson²,

Iverson³

et al. 2008

Mar. Ecol. Prog. Ser.

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Quantitative fatty acid (FA) signature analysis (QFASA) has recently been developed to estimate the species composition of predator diets by statistically comparing FA signatures of predator adipose tissue with that of their potential prey. Captive feeding trials were used to further test the technique with newly weaned harbour seals Phoca vitulina richardsi (N = 21). Two groups of seals were fed monotypic diets of either Pacific herring Clupea pallasii or surf smelt Hypomesus pretiosus for 42 d while a third group was fed smelt for 21 d followed by herring for 21 d. Blubber biopsies were taken dorsally at Days 0, 21 and 42. Specific calibration coefficients (CC) used by QFASA were developed from 4 juvenile harbour seals and in some cases differed by 2-fold with previously reported phocid CC values. The QFASA diet estimates were evaluated using 2 CC sets, 15 FA subsets and a library of 3 to 11 potential prey species. Diet switches were best tracked using the harbour seal CC and the new FA subset. Overall prey misclassifications were apparent (mean = 12%, range = 4 to 25%) when modeled with 8 additional prey not fed, a trend consistent with overlapping prey FA signatures. Blubber FA turnover rates were not strictly linear and in the order of 1.5 to 3 mo in newly weaned seals. Following parameter optimization of the model, QFASA estimates reflected major diet trends in the feeding study, but were sensitive to the CC and FA subsets used as well as to prey species with similar FA signatures. Our results have important implications in the application of QFASA to the study of pinniped diets with more complex feeding histories and wider prey fields.

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Influence of Dietary Fat Source on the Body Fat Composition of Mink (Mustela vison) and Blue Fox (Alopex lagopus)

Cited by 53 publications

References 13 publications

Tracing aquatic food webs using fatty acids: from qualitative indicators to quantitative determination

Tracing aquatic food webs using fatty acids: from qualitative indicators to quantitative determination

Fatty acid signatures in plasma of captive herring gulls as indicators of demersal or pelagic fish diet

Evaluating quantitative fatty acid signature analysis (QFASA) using harbour seals Phoca vitulina richardsi in captive feeding studies

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