Characterization of forage fish and invertebrates in the Northwestern Hawaiian Islands using fatty acid signatures: species and ecological groups

Piché, Jacinthe; Iverson, Sara J.; Parrish, Frank A.; Dollar, Robert A.

doi:10.3354/meps08814

Cited by 38 publications

(26 citation statements)

References 47 publications

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“…This is in line with observations from other fish assemblages at e.g. the Scotian Shelf, Georges log SL [mm] Bank, Gulf of Lawrence or the North-western Hawaiian Islands where strong interspecific variations in FA were reported (Budge et al 2002;Piche et al 2010). Overall, the factors sampling year and species explained most of the FA variation of our five fish species with slightly more variation explained by interannual changes in FA profiles.…”

Section: Fatty Acid Composition Of Target Fish Speciessupporting

confidence: 91%

“…In general, the DHA/EPA ratio is used as an index for carnivory (Dalsgaard et al 2003;Piche et al 2010). With regard to C. rupestris, a preference for crustaceans and mussels described by Hilldén (1978) and Wennhage and Pihl (2002) is supported by the high values in both FA 18:1n9/18:1n7 and DHA/EPA, indicating carnivorous feeding modes.…”

Section: Multi-tracer Approachmentioning

confidence: 99%

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Trophic niche partitioning of littoral fish species from the rocky intertidal of Helgoland, Germany

Hielscher

Malzahn

Diekmann³

et al. 2015

Helgol Mar Res

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During a 3-year field study, interspecific and interannual differences in the trophic ecology of littoral fish species were investigated in the rocky intertidal of Helgoland island (North Sea). We investigated trophic niche partitioning of common coexisting littoral fish species based on a multi-tracer approach using stable isotope and fatty acids in order to show differences and similarities in resource use and feeding modes. The results of the dualtracer approach showed clear trophic niche partitioning of the five target fish species, the goldsinny wrasse Ctenolabrus rupestris, the sand goby Pomatoschistus minutus, the painted goby Pomatoschistus pictus, the short-spined sea scorpion Myoxocephalus scorpius and the long-spined sea scorpion Taurulus bubalis. Both stable isotopes and fatty acids showed distinct differences in the trophic ecology of the studied fish species. However, the combined use of the two techniques added an additional resolution on the interannual scale. The sand goby P. minutus showed the largest trophic plasticity with a pronounced variability between years. The present data analysis provides valuable information on trophic niche partitioning of fish species in the littoral zones of Helgoland and on complex benthic food webs in general.

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Section: Fatty Acid Composition Of Target Fish Speciessupporting

confidence: 91%

Section: Multi-tracer Approachmentioning

confidence: 99%

Trophic niche partitioning of littoral fish species from the rocky intertidal of Helgoland, Germany

Hielscher

Malzahn

Diekmann³

et al. 2015

Helgol Mar Res

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show abstract

“…different species (Budge et al 2002), functional groups (Piché et al 2010), or consumers on different diets in a controlled feeding study (Navarro et al 1997). MANOVA is used to test for significant differences in overall FA composition among groups of samples by examining whether mean differences among groups could have occurred by chance.…”

Section: Multivariate Statisticsmentioning

confidence: 99%

“…Proportional FA data require transformation to meet the assumption of multivariate normality (Budge et al 2006). The log-ratio transformation, x trans = ln (x i /c r ), where x i is a given FA expressed as percent of total FAs, and c r is the percentage of a reference FA, has been recommended for FA data (Budge et al 2006, Piché et al 2010. The reference FA for this transformation should be one that is present regardless of diet, and is reliably quantified (Budge et al 2006).…”

Section: Multivariate Statisticsmentioning

confidence: 99%

Fatty acids as dietary tracers in benthic food webs

Kelly¹,

Scheibling²

2012

Mar. Ecol. Prog. Ser.

454

413

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“…Budge et al 2002, Iverson et al 2002, Piche et al 2010, combined with . The high levels of these biomarkers in early June of both years indicate that copepods had been abundantly available for several weeks.…”

Section: Quantitative Estimation Of Dietsmentioning

confidence: 99%