Identifying migrations in marine fishes through stable‐isotope analysis

Trueman, Clive N.; MacKenzie, Kirsteen M.; Palmer, Martin R.

doi:10.1111/j.1095-8649.2012.03361.x

Cited by 137 publications

(98 citation statements)

References 97 publications

(124 reference statements)

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“…In the marine environment, the ocean is spatially homogenous with regard to hydrogen isotope ratios, so δ 2 H values cannot be used to assign marine animals to a likely geographic origin (Trueman et al 2012). The isotopic composition of carbon (δ 13 C) and nitrogen (δ 15 N) in phytoplankton varies spatially, largely reflecting differences in the isotopic composition of nutrients and phytoplankton taxonomic composition.…”

Section: Introductionmentioning

confidence: 99%

Moult location and diet of auks in the North Sea inferred from coupled light-based and isotopebased geolocation

Glew¹,

Wanless²,

Harris³

et al. 2018

Mar. Ecol. Prog. Ser.

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Many pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours specifically linked to at-sea moulting are commonly unclear. This paper combines 2 different approaches to geolocation: data from bird-borne geolocation loggers and stableisotope assignment using carbon and nitrogen isotope maps (isoscapes). Coupling 2 geolocation processes allows some uncertainties associated with isotope-based assignment to be constrained. We applied this approach to quantify species-specific foraging locations and individual trophic variability during feather regrowth in 3 sympatric auk populations breeding on the Isle of May, Scotland (common guillemot Uria aalge, razorbill Alca torda and Atlantic puffin Fratercula arctica). Inferred foraging areas during moult differed between species and feather types. Guillemots likely underwent moult within the southern North Sea, razorbills along the east coast of England and into the southern North Sea and puffins off the east coast of Scotland. Estimates of individual trophic position varied considerably within feather types (up to 1 trophic level difference between individuals), among feather types grown during different time periods and across the 3 species, with guillemots consistently foraging at higher trophic positions than razorbills and puffins. Used in combination, these methods better constrain foraging areas during moulting, and provide a technique to explore individual differences and flexibility in foraging strategy, which is valuable information for both seabird conservation and marine spatial planning.

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Section: Introductionmentioning

confidence: 99%

Moult location and diet of auks in the North Sea inferred from coupled light-based and isotopebased geolocation

Glew¹,

Wanless²,

Harris³

et al. 2018

Mar. Ecol. Prog. Ser.

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“…Stable isotope analysis has helped unravel migratory behaviors of marine species (Killingley 1980, Hobson 1999, Trueman et al 2012), but despite significant progress, isotopic patterns and their underlying drivers in marine systems are less understood compared to terrestrial systems. Satellite-tracked individuals often constitute training data for the development of models to geographically assign individuals of unknown origin (e.g., Jaeger et al 2010, Ceriani et al 2012, Seminoff et al 2012.…”

Section: Introductionmentioning

confidence: 99%

Modeling and mapping isotopic patterns in the Northwest Atlantic derived from loggerhead sea turtles

et al. 2014

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Abstract. Stable isotope analysis can be used to infer geospatial linkages of highly migratory species.Identifying foraging grounds of marine organisms from their isotopic signatures is becoming de rigueur as it has been with terrestrial organisms. Sea turtles are being increasingly studied using a combination of satellite telemetry and stable isotope analysis; these studies along with those from other charismatic, highly vagile, and widely distributed species (e.g., tuna, billfish, sharks, dolphins, whales) have the potential to yield large datasets to develop methodologies to decipher migratory pathways in the marine realm. We collected tissue samples (epidermis and red blood cells) for carbon (d 13 C) and nitrogen (d 15 N) stable isotope analysis from 214 individual loggerheads (Caretta caretta) in the Northwest Atlantic Ocean (NWA). We used discriminant function analysis (DFA) to examine how well d 13 C and d 15 N classify loggerhead foraging areas. The DFA model was derived from isotopic signatures of 58 loggerheads equipped with satellite tags to identify foraging locations. We assessed model accuracy with the remaining 156 untracked loggerheads that were captured at their foraging locations. The DFA model correctly identified the foraging ground of 93.0% of individuals with a probability greater than 66.7%. The results of the external validation (1) confirm that assignment models based on tracked loggerheads in the NWA are robust and (2) provide the first independent evidence supporting the use of these models for migratory marine organisms. Additionally, we used these data to generate loggerhead-specific d 13 C and d 15 N isoscapes, the first for a predator in the Atlantic Ocean. We found a latitudinal trend of

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“…From the first estimations of seawater temperatures derived from the δ 18 O of fish otoliths by Devereux (1967), otolith δ 18 O has increasingly been applied to identify marine fish origin (e.g. Gao & Bean 2008, Rooker et al 2008, Trueman et al 2012, differentiate between residents and migrants (e.g. Northcote et al 1992, Bastow et al 2002, Blamart et al 2002, Ayvazian et al 2004) and to distinguish between mixing and non-mixing stocks (e.g.…”

mentioning

confidence: 99%

“…Surge & Walker 2005, Shephard et al 2007, Rooker et al 2008, Imsland et al 2014, and scientists are increasingly seeking applications for tracking fish geographical movements based on oxygen isoscapes (e.g. Wunder 2010, Trueman et al 2012, Torniainen et al 2017. Individual experience and environmental variation, however, have not previously been considered to any significant extent in fish studies involving otolith δ 18 O (e.g.…”

mentioning

confidence: 99%

Validation of otolith δ18O values as effective natural tags for shelf-scale geolocation of migrating fish

Darnaude¹,

Hunter²

2018

Mar. Ecol. Prog. Ser.

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The oxygen isotopic ratio of fish otoliths is increasingly used as a 'natural tag' to assess provenance in migratory species, with the assumption that variations in δ 18O values closely reflect individual ambient experience of temperature and/or salinity. We employed archival tag data and otoliths collected from a shelf-scale study of the spatial dynamics of North Sea plaice Pleuronectes platessa L., to examine the limits of otolith δ O ranges. Where mismatches were observed, differences among sub-stocks were consistently greater than predicted, suggesting that in plaice, differential sub-stock growth rates and physiological effects during oxygen fractionation enhance geolocation potential using otolith δ

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Identifying migrations in marine fishes through stable‐isotope analysis

Cited by 137 publications

References 97 publications

Moult location and diet of auks in the North Sea inferred from coupled light-based and isotopebased geolocation

Moult location and diet of auks in the North Sea inferred from coupled light-based and isotopebased geolocation

Modeling and mapping isotopic patterns in the Northwest Atlantic derived from loggerhead sea turtles

Validation of otolith δ18O values as effective natural tags for shelf-scale geolocation of migrating fish

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