Optimal swimming strategies and behavioral plasticity of oceanic whitetip sharks

Animal behavior should optimize the difference between the energy they gain from prey and the energy they spend searching for prey. This is all the more critical for predators occupying the pelagic environment, as prey is sparse and patchily distributed. We theoretically derive two canonical swimmin...

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Veröffentlicht in:Scientific reports Jg. 8; H. 1; S. 551
Hauptverfasser: Papastamatiou, Yannis P., Iosilevskii, Gil, Leos-Barajas, Vianey, Brooks, Edd J., Howey, Lucy A., Chapman, Demian D., Watanabe, Yuuki Y.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 11.01.2018
Nature Publishing Group
Schlagworte:
631/158/2455
631/158/856
9/10
Animal behavior
Behavior
Behavioral plasticity
Body mass
Carcharhinus longimanus
Energy
Energy requirements
Humanities and Social Sciences
multidisciplinary
Pelagic environment
Plasticity
Predators
Prey
Science
Science (multidisciplinary)
Sharks
Swimming
Swimming behavior
ISSN:2045-2322, 2045-2322
Online-Zugang:Volltext
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Zusammenfassung:Animal behavior should optimize the difference between the energy they gain from prey and the energy they spend searching for prey. This is all the more critical for predators occupying the pelagic environment, as prey is sparse and patchily distributed. We theoretically derive two canonical swimming strategies for pelagic predators, that maximize their energy surplus while foraging. They predict that while searching, a pelagic predator should maintain small dive angles, swim at speeds near those that minimize the cost of transport, and maintain constant speed throughout the dive. Using biologging sensors, we show that oceanic whitetip shark ( Carcharhinus longimanus ) behavior matches these predictions. We estimate that daily energy requirements of an adult shark can be met by consuming approximately 1–1.5 kg of prey (1.5% body mass) per day; shark-borne video footage shows a shark encountering potential prey numbers exceeding that amount. Oceanic whitetip sharks showed incredible plasticity in their behavioral strategies, ranging from short low-energy bursts on descents, to high-speed vertical surface breaches from considerable depth. Oceanic whitetips live a life of energy speculation with minimization, very different to those of tunas and billfish.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-18608-z