scholarly journals Individuality of foraging behaviour in a short-ranging benthic marine predator: incidence and implications

2019 ◽  
Vol 609 ◽  
pp. 209-219 ◽  
Author(s):  
EA Morgan ◽  
C Hassall ◽  
CPF Redfern ◽  
RM Bevan ◽  
KC Hamer
Keyword(s):  
Foraging Behaviour ◽  
Marine Predator

scholarly journals Large-scale climatic anomalies affect marine predator foraging behaviour and demography

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Charles A. Bost ◽  
Cedric Cotté ◽  
Pascal Terray ◽  
Christophe Barbraud ◽  
Cécile Bon ◽  
...  
Keyword(s):  
Large Scale ◽  
Foraging Behaviour ◽  
Marine Predator ◽  
Predator Foraging

Individual specialization in diet by a generalist marine predator reflects specialization in foraging behaviour

2008 ◽  
Vol 77 (6) ◽  
pp. 1082-1091 ◽  
Author(s):  
Kerry J. Woo ◽  
Kyle Hamish Elliott ◽  
Melissa Davidson ◽  
Anthony J. Gaston ◽  
Gail K. Davoren
Keyword(s):  
Foraging Behaviour ◽  
Individual Specialization ◽  
Marine Predator

Individual repeatability of foraging behaviour in a marine predator, the great cormorant, Phalacrocorax carbo

2015 ◽  
Vol 103 ◽  
pp. 83-90 ◽  
Author(s):  
Simon Potier ◽  
Alexandre Carpentier ◽  
David Grémillet ◽  
Boris Leroy ◽  
Amélie Lescroël
Keyword(s):  
Foraging Behaviour ◽  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Marine Predator ◽  
Individual Repeatability

scholarly journals Understanding the ontogeny of foraging behaviour: insights from combining marine predator bio-logging with satellite-derived oceanography in hidden Markov models

2018 ◽  
Vol 15 (143) ◽  
pp. 20180084 ◽  
Author(s):  
W. James Grecian ◽  
Jude V. Lane ◽  
Théo Michelot ◽  
Helen M. Wade ◽  
Keith C. Hamer
Keyword(s):  
Foraging Behaviour ◽  
Markov Models ◽  
Transition Probabilities ◽  
Hidden Markov ◽  
Extended Period ◽  
Foraging Strategies ◽  
Habitat Features ◽  
Marine Predator ◽  
Age Related ◽  
Frontal Activity

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 specializations 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.

scholarly journals Modelled mid‐trophic pelagic prey fields improve understanding of marine predator foraging behaviour

Ecography ◽  
2020 ◽  
Vol 43 (7) ◽  
pp. 1014-1026
Author(s):  
D. B. Green ◽  
S. Bestley ◽  
R. Trebilco ◽  
S. P. Corney ◽  
P. Lehodey ◽  
...  
Keyword(s):  
Foraging Behaviour ◽  
Marine Predator ◽  
Pelagic Prey ◽  
Predator Foraging

scholarly journals Coupling bio-logging with nutritional geometry to reveal novel insights into the foraging behaviour of a plunge-diving marine predator

2016 ◽  
Vol 50 (3) ◽  
pp. 418-432 ◽  
Author(s):  
Gabriel E Machovsky-Capuska ◽  
David Priddel ◽  
Philip HW Leong ◽  
Peter Jones ◽  
Nicholas Carlile ◽  
...  
Keyword(s):  
Foraging Behaviour ◽  
Marine Predator ◽  
Nutritional Geometry

scholarly journals Risky business for a juvenile marine predator? Testing the influence of foraging strategies on size and growth rate under natural conditions

2017 ◽  
Vol 284 (1852) ◽  
pp. 20170166 ◽  
Author(s):  
Nigel E. Hussey ◽  
Joseph D. DiBattista ◽  
Jonathan W. Moore ◽  
Eric J. Ward ◽  
Aaron T. Fisk ◽  
...  
Keyword(s):  
Growth Rate ◽  
Predation Risk ◽  
Foraging Behaviour ◽  
Foraging Strategies ◽  
Supporting Evidence ◽  
Marine Predator ◽  
High Predation ◽  
Variable Movement ◽  
Juvenile Sharks ◽  
Selection Of

Mechanisms driving selection of body size and growth rate in wild marine vertebrates are poorly understood, thus limiting knowledge of their fitness costs at ecological, physiological and genetic scales. Here, we indirectly tested whether selection for size-related traits of juvenile sharks that inhabit a nursery hosting two dichotomous habitats, protected mangroves (low predation risk) and exposed seagrass beds (high predation risk), is influenced by their foraging behaviour. Juvenile sharks displayed a continuum of foraging strategies between mangrove and seagrass areas, with some individuals preferentially feeding in one habitat over another. Foraging habitat was correlated with growth rate, whereby slower growing, smaller individuals fed predominantly in sheltered mangroves, whereas larger, faster growing animals fed over exposed seagrass. Concomitantly, tracked juveniles undertook variable movement behaviours across both the low and high predation risk habitat. These data provide supporting evidence for the hypothesis that directional selection favouring smaller size and slower growth rate, both heritable traits in this shark population, may be driven by variability in foraging behaviour and predation risk. Such evolutionary pathways may be critical to adaptation within predator-driven marine ecosystems.

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