Foraging habitats of lactating northern fur seals are structured by thermocline depths and submesoscale fronts in the eastern Bering Sea

Nordstrom, Chad A.; Battaile, Brian C.; Cotté, Cédric; Trites, Andrew W.

doi:10.1016/j.dsr2.2012.07.010

Cited by 52 publications

(51 citation statements)

References 79 publications

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“…Animals were recaptured for tag and data recovery after foraging trips. Further details of the instrument deployments and handling can be found in Nordstrom et al (2013).…”

Section: Taggingmentioning

confidence: 99%

“…During the summer, lactating northern fur seals are central place foragers (Orians & Pearson 1979), making extended (1−14 d) foraging trips of hundreds of kilometers between short (1−3 d) stays on land to nurse their pups (Gentry & Holt 1986, Nordstrom et al 2013. Females breeding in the southeastern Bering Sea feed mainly on juvenile walleye pollock, squid, forage fish, and vertically migrating mesopelagic fish (Sinclair et al 2008, Call & Ream 2012.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Benoit‐Bird¹,

Battaile²,

Nordstrom³

et al. 2013

Mar. Ecol. Prog. Ser.

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“…Animals were recaptured for tag and data recovery after foraging trips. Further details of the instrument deployments and handling can be found in Nordstrom et al (2013).…”

Section: Taggingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Benoit‐Bird¹,

Battaile²,

Nordstrom³

et al. 2013

Mar. Ecol. Prog. Ser.

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“…v www.esajournals.org linear distances reported in Nordstrom et al (2013a) (228 km) and Goebel et al (1991) (200 km). The length of time of the foraging trip is consistent with reported lengths from other studies (e.g., Holt 1986, Nordstrom et al 2013a; from 1 to 14 days).…”

Section: Discussionmentioning

confidence: 91%

“…However, it may still reflect persistent prey distributions that are attractive to foraging northern fur seals. Nordstrom et al (2013a) also linked foraging of northern fur seals to oceanic surface fronts (eddies and filaments) and Kuhn (2011), to thermocline depth. These features may also be proxies for the spatial distribution of prey species.…”

Section: Discussionmentioning

confidence: 99%

Linking northern fur seal dive behavior to environmental variables in the eastern Bering Sea

et al. 2015

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Abstract. Northern fur seals (Callorhinus ursinus) breeding on the Pribilof Islands, Alaska have declined dramatically over the past 40 years. Effective conservation of northern fur seals depends on understanding the foraging behavior of adult females whose foraging success is linked to pup survival. We determined the foraging behavior for 11 tagged lactating female northern fur seals from the Pribilof Islands using a statespace modeling approach with an autoregressive movement model. To interpret at-sea behavior in the context of oceanic habitat, we spatially and temporally matched high-resolution reconstructed tracks to a set of environmental covariates that included: commercial groundfish catch, sea surface temperature, primary productivity, wind speed, depth and time of day. We used a Bayesian hierarchical framework to implement a multinomial regression model to link behavior to environmental covariates and account for the mismatch of scale between fur seal behavior and the environmental variables by incorporating an errorin-covariates approach into the hierarchical model. The Bayesian framework allowed us to build a single model to synthesize the information from all the northern fur seal foraging tracks and the available information about the underlying environmental conditions. Application of the approach indicated that the behavioral states for the northern fur seal were significantly related to the Alaska commercial groundfish catch, particularly walleye pollock (Gadus chalogramma).

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“…Females foraging over the shelf dived deeper (sometimes to the bottom) for longer times overall compared to the strictly pelagic, shallow and short dives of the oceanic females. Such differences in neritic and oceanic foraging behaviours have been previously noted for females breeding on Reef Rookery (Gentry 1998, Nordstrom et al 2013.…”

Section: Biologging Stable Isotopes and Prey Associations Reveal 2 Fmentioning

confidence: 88%

Combining hard-part and DNA analyses of scats with biologging and stable isotopes can reveal different diet compositions and feeding strategies within a fur seal population

Jeanniard‐du‐Dot¹,

Thomas²,

Cherel³

et al. 2017

Mar. Ecol. Prog. Ser.

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Foraging habitats of lactating northern fur seals are structured by thermocline depths and submesoscale fronts in the eastern Bering Sea

Cited by 52 publications

References 79 publications

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Foraging behavior of northern fur seals closely matches the hierarchical patch scales of prey

Linking northern fur seal dive behavior to environmental variables in the eastern Bering Sea

Combining hard-part and DNA analyses of scats with biologging and stable isotopes can reveal different diet compositions and feeding strategies within a fur seal population

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