marine predator
Effects of age and reproductive status on individual foraging site fidelity in a long lived marine predator
... Individual foraging specializations, where individuals use a small com- ponent of the population niche width, are widespread in nature with important ecological and evolutionary implications. In long-lived animals, ...
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Spatial, temporal and within-species variation in the foraging ecology of a marine predator across a dynamic seascape
... providing a fundamental link between lower and upper trophic levels (Hobson and Welch 1992). Ringed seals are the most abundant pinniped species across the Arctic (Laidre et al. 2015), have a circumpolar distribution and ...
277
Estimating resource acquisition and at sea body condition of a marine predator
... Body condition typically varies as a function of many variables including resource intake, movement, parental care, stressors, predation and environmental conditions (Clutton-Brock, Guinness & Albon 1982). ...
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The cost of foraging by a marine predator, the Weddell seal Leptonychotes weddellii: pricing by the stroke
... in marine mammals (Elsner, 1986; Williams et ...and marine (Costa and Williams, 1999) carnivores, metabolic rate may increase 30–67% over resting levels following the ingestion of ...one marine ...
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Marine predator foraging strategies in response to broad and fine scale resource variability
... (Campagna et al., 1999;McIntyre et al., 2010) to feed predominately on small mesopelagic fish (Cherel et al., 2008). These deep-diving predators must return repeatedly to the surface to breathe, and can therefore be ...
232
Drivers of daily routines in an ectothermic marine predator : hunt warm, rest warmer?
... Over diel time frames, temperature changes can be significant and ectotherms may modify behaviours to take advantage of thermal regimes. Two behavioural routines have been pro- posed for marine predators: ‘hunt ...
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Effects of windscape on three-dimensional foraging behaviour in a wide-ranging marine predator, the northern gannet
... ABSTRACT: Marine birds are strongly exposed to weather conditions at sea but to date, few stud- ies have investigated the influences of wind or rainfall on their time−activity budgets or foraging ...
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Frequency and consequences of individual dietary specialisation in a wide-ranging marine predator, the northern gannet
... 331 However, we did find that birds exhibiting different dietary strategies generalists, 332 forage fish or discard specialists frequently experienced different competitive regimes while[r] ...
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Fishing for drifts: detecting buoyancy changes of a top marine predator using a step wise filtering method
... Given the abstracted nature of any time – depth record, any drift dive identification method is prone to error, be they visual dive classification or random forest algorithms trained by visually classified datasets ...
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Biogeophysical and physiological processes drive movement patterns in a marine predator
... National Marine Fisheries Service (NMFS) Apex Predator Program mark- recapture study of >100,000 blue sharks, many of which were tagged off the coast of New England during sea- sonal abundances [24], has ...
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Addressing Data Deficiencies in a Threatened Mobile Marine Predator
... effective management strategies to be implemented for large species such as sharks. Reef sharks are typically considered apex predators in coral reef systems; however, when incorporating stomach content data and stable ...
228
Sexual segregation in a wide-ranging marine predator is a consequence of habitat selection
... 286 Differences in Habitat Usage 287 Males foraged predominantly in mixed waters to the North-East of Bass Rock inshore of the 288 tidal mixing front, whereas females foraged predominant[r] ...
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The trophic role of a large marine predator, the tiger shark Galeocerdo cuvier
... and sandflats habitats of Shark Bay and these shallow habitats might not be suitable for many large pelagic fishes such as tunas. The classification of tiger sharks as the highest trophic level predators in these ...
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Three dimensional tracking of a wide-ranging marine predator: flight heights and vulnerability to offshore wind farms
... largest breeding population of gannets ( ~ 75 000 breeding pairs in 2014; Murray, Harris & Wanless 2015), yet sev- eral large wind farms have been scheduled for construc- tion in its vicinity within the next 5 years ...
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Using DNA to explore predator diet in temperate marine ecosystems
... the predator being studied, the ecological questions being asked, and any previous knowledge about the potential prey items which may be consumed by the predator (King et ...a predator may be feeding ...
176
Disease epidemic and a marine heat wave are associated with the continental-scale collapse of a pivotal predator (Pycnopodia helianthoides)
... important predator of sea urchins, and ur- chin populations released from top-down predatory control can expand and threaten kelp forests and biodiversity (24, ...subtidal predator when other urchin ...
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Escape responses in juvenile Atlantic cod Gadus morhua L : the effects of turbidity and predator speed
... The predator stimulus and high-speed camera were triggered when cod entered into a ‘target area’ that was trapezium shaped (base: 15·cm, height: 10·cm, area: 300·cm 2 ) and 8–28·cm from where the predator ...
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A spatial theory for emergent multiple predator-prey interactions in food webs
... the predator- free refuge, and without their preferred prey, the intraguild predator then at- tacks the intraguild ...multiple predator effects. We find that in the two- predator scenario when ...
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Intrapopulation variations in diet and habitat use in a marine apex predator, the broadnose sevengill shark Notorynchus cepedianus
... They are seasonally abundant in shallow coastal habitats (Ebert 1989, Lucifora et al. 2005, Barnett et al. 2010a), where they feed mostly on other elasmo- branchs, marine mammals and teleosts (Ebert 1989, 1991, ...
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Two habitats and a predator switching model with group defense
... In predator-prey environment, when a prey species of small size with little defense capability with respect to predator, like small Dik-dik, the predator prefers to catch prey species in a habitat ...
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