Understanding the ontogeny of foraging behaviour: insights from combining marine predator bio-logging with satellite-derived oceanography in hidden Markov models
| Autor: | Théo Michelot, Keith C. Hamer, Helen M. Wade, W. James Grecian, Jude V. Lane |
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| Přispěvatelé: | NERC, University of St Andrews. School of Biology, University of St Andrews. Sea Mammal Research Unit, University of St Andrews. Scottish Oceans Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Computer science QH301 Biology Oceanography 01 natural sciences Biochemistry Movement ecology foraging ecology QA Hidden Markov model Predator GC learning Ecology Logging Markov Chains Habitat movement ecology GC Oceanography Foraging ecology Biotechnology Research Article Exploit Foraging finite-size Lyapunov exponent Biomedical Engineering Biophysics Bioengineering 010603 evolutionary biology Biomaterials Birds QH301 Marine vertebrate Learning Animals Animal telemetry QA Mathematics SDG 14 - Life Below Water Ecosystem 010604 marine biology & hydrobiology DAS Feeding Behavior Predatory Behavior marine vertebrate Satellite Finite-size Lyapunov exponent Life Sciences–Mathematics interface animal telemetry |
| Zdroj: | Journal of the Royal Society Interface |
| ISSN: | 1742-5689 |
| Popis: | This work was funded by the Natural Environment Research Council and the Department for Business, Energy and Industrial Strategy. The development of foraging strategies that enable juveniles to efficiently identify and exploit predictable habitat features is critical for survival and long-term fitness. In the marine environment, meso- and sub-mesoscale features such as oceanographic fronts offer a visible cue to enhanced foraging conditions, but how individuals learn to identify these features is a mystery. In this study, we investigate age-related differences in the fine-scale foraging behaviour of adult (aged ≥ 5 years) and immature (aged 2-4 years) northern gannets Morus bassanus. Using high-resolution GPS-loggers, we reveal that adults have a much narrower foraging distribution than immature birds and much higher individual foraging site fidelity. By conditioning the transition probabilities of a hidden Markov model on satellite-derived measures of frontal activity, we then demonstrate that adults show a stronger response to frontal activity than immature birds, and are more likely to commence foraging behaviour as frontal intensity increases. Together, these results indicate that adult gannets are more proficient foragers than immatures, supporting the hypothesis that foraging specialisations are learned during individual exploratory behaviour in early life. Such memory-based individual foraging strategies may also explain the extended period of immaturity observed in gannets and many other long-lived species. Publisher PDF |
| Databáze: | OpenAIRE |
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