ArticleScientific reports2021
Drivers and constraints on offshore foraging in harbour seals.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Adaptations of seal louse nits to underwater life: morphology, respiration and attachment.Die Naturwissenschaften · 2026Article
- Blood parameters of wild-caught harbor seals (Frontiers in veterinary science · 2026Article
- Scale-dependent foraging behaviour and habitat associations of two sympatric marine top predators.Landscape ecology · 2026Article
- Movements and spatial usage of harbour seals in the Elbe estuary in Germany.Scientific reports · 2023Article
- Vessel noise exposures of harbour seals from the Wadden Sea.Scientific reports · 2023Article
- Estimating energetic intake for marine mammal bioenergetic models.Conservation physiology · 2023Article
- Prey encounters and spatial memory influence use of foraging patches in a marine central place forager.Proceedings. Biological sciences · 2022Article
- Occurrence of Microplastics in Harbour Seals (Animals : an open access journal from MDPI · 2022Article
- Central place foraging in an ectotherm and the long-term liability of selecting the "wrong" central place.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Central place foragers are expected to offset travel costs between a central place and foraging areas by targeting productive feeding zones. Harbour seals (Phoca vitulina) make multi-day foraging trips away from coastal haul-out sites presumably to target rich food resources, but periodic track points from telemetry tags may be insufficient to infer reliably where, and how often, foraging takes place. To study foraging behaviour during offshore trips, and assess what factors limit trip duration, we equipped harbour seals in the German Wadden Sea with high-resolution multi-sensor bio-logging tags, recording 12 offshore trips from 8 seals. Using acceleration transients as a proxy for prey capture attempts, we found that foraging rates during travel to and from offshore sites were comparable to offshore rates. Offshore foraging trips may, therefore, reflect avoidance of intra-specific competition rather than presence of offshore foraging hotspots. Time spent resting increased by approx. 37 min/day during trips suggesting that a resting deficit rather than patch depletion may influence trip length. Foraging rates were only weakly correlated with surface movement patterns highlighting the value of integrating multi-sensor data from on-animal bio-logging tags (GPS, depth, accelerometers and magnetometers) to infer behaviour and habitat use.
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