Hydrodynamic patterns from fast-starts in teleost fish and their possible relevance to predator–prey interactions

Niesterok, Benedikt; Hanke, Wolf

doi:10.1007/s00359-012-0775-5

Cited by 24 publications

(12 citation statements)

References 21 publications

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“…These water movements provide valuable sources of information for piscivorous predators at a distance not only about the presence of a fish of suitable size but also about the species or the swimming style of the fish that have passed by at an earlier point in time (Hanke and Bleckmann, 2004). A recent study showed that the flow structures caused by the fast-starting fish consisted of multiple jets that contain directional information, which are suited to provide aquatic predators not only with information on the presence of a fish of suitable size, but also on the direction of its escape (Niesterok and Hanke, 2013). Harbor seals-piscivorous mammals-are known to use their vibrissae to haptically discriminate the water movements left behind by prey or predator, and perceive the motion path, size and shape of the object that caused the trail (Hanke, 2014).…”

Section: Information In Liquidmentioning

confidence: 99%

Locating the Inexhaustible: Material, Medium, and Ambient Information

Nonaka

2020

Front. Psychol.

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The fundamental difference between the enactive approach and Gibson's ecological approach lies in the view toward our shared environment. For Varela et al. (1991), a pregiven environment that exists "out there" is incompatible with the worlds enacted by various histories of life. For Gibson (1979Gibson ( /2015, the environment with its unlimited possibilities that exists out there offers many ways of life. Drawing on the recent empirical studies on the mechanical basis of information and pattern formation in a wide range of fields, this paper illustrates a principle regarding how pattern and change that are formed in an environmental medium, under certain conditions, could serve as the reservoir of information that makes available a variety of opportunities for perception. The second part of this paper offers a discussion about how the consideration of the materials that make up the terrestrial environment-the particles in the atmosphere and the textured surfaces-led Gibson to replace the concept of "space" with the notion of "medium" that allows for the open-ended activities of perception. Finally, I argue that given due consideration of the ambient information available in the medium, the apparent incompatibility between the world independent of the perceiver that exist out there and the worlds enacted by various histories of life could be resolved.

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Section: Information In Liquidmentioning

confidence: 99%

Locating the Inexhaustible: Material, Medium, and Ambient Information

Nonaka

2020

Front. Psychol.

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“…For example, C-starts can generate strong and longlasting flow signatures (Niesterok & Hanke 2012), and swimming fish can be tracked via their wake long after they have passed. While vision, hearing, and smell are also employed, many aquatic animals possess the unique ability to detect prey or predator and even form a threedimensional map of the surroundings by sensing the velocity and pressure fields through multiple sensors distributed along their body.…”

Section: Flow Sensing In Aquatic Animals and Marine Vehiclesmentioning

confidence: 99%

Biomimetic Survival Hydrodynamics and Flow Sensing

Triantafyllou

Weymouth

Miao

2016

Annu. Rev. Fluid Mech.

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The fluid mechanics employed by aquatic animals in their escape or attack maneuvers, what we call survival hydrodynamics, are fascinating because the recorded performance in animals is truly impressive. Such performance forces us to pose some basic questions on the underlying flow mechanisms that are not in use yet in engineered vehicles. A closely related issue is the ability of animals to sense the flow velocity and pressure field around them in order to detect and discriminate threats in environments where vision or other sensing is of limited or no use. We review work on animal flow sensing and actuation as a source of inspiration, and in order to formulate a number of basic problems and investigate the flow mechanisms that enable animals develop their remarkable performance. We describe some intriguing mechanisms of actuation and sensing.

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“…Harbour seals can track fish-like hydrodynamic trails (Dehnhardt et al, 2001), which allows them to detect pelagic fish over extended distances. The water movements from fast-starts in fish are especially strong and remain above background noise for several minutes (Niesterok and Hanke, 2013).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic detection and localization of artificial flatfish breathing currents by harbour seals (Phoca vitulina)

Niesterok¹,

Krüger²,

Wieskotten³

et al. 2017

Journal of Experimental Biology

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Harbour seals are known to be opportunistic feeders, whose diet consists mainly of pelagic and benthic fish, such as flatfish. As flatfish are often cryptic and do not produce noise, we hypothesized that harbour seals are able to detect and localize flatfish using their hydrodynamic sensory system (vibrissae), as fish emit water currents through their gill openings (breathing currents). To test this hypothesis, we created an experimental platform where an artificial breathing current was emitted through one of eight different openings. Three seals were trained to search for the active opening and station there for 5 s. Half of the trials were conducted with the seal blindfolded with an eye mask. In blindfolded and non-blindfolded trials, all seals performed significantly better than chance. The seals crossed the artificial breathing current (being emitted into the water column at an angle of 45 deg to the ground) from different directions. There was no difference in performance when the seals approached from in front, from behind or from the side. All seals responded to the artificial breathing currents by directly moving their snout towards the opening from which the hydrodynamic stimulus was emitted. Thus, they were also able to extract directional information from the hydrodynamic stimulus. Hydrodynamic background noise and the swimming speed of the seals were also considered in this study as these are aggravating factors that seals in the wild have to face during foraging. By creating near-natural conditions, we show that harbour seals have the ability to detect a so-far overlooked type of stimulus.

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Hydrodynamic patterns from fast-starts in teleost fish and their possible relevance to predator–prey interactions

Cited by 24 publications

References 21 publications

Locating the Inexhaustible: Material, Medium, and Ambient Information

Locating the Inexhaustible: Material, Medium, and Ambient Information

Biomimetic Survival Hydrodynamics and Flow Sensing

Hydrodynamic detection and localization of artificial flatfish breathing currents by harbour seals (Phoca vitulina)

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