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A Novel Interceptio...
A Novel Interception Strategy in a Miniature Robber Fly with Extreme Visual Acuity
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Wardill, Trevor J (författare)
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Fabian, Samuel T (författare)
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Pettigrew, Ann C (författare)
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Stavenga, Doekele G (författare)
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- Nordström, Karin (författare)
- Centre for Neuroscience, Flinders University, Adelaide, Australia,Motion Vision
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Gonzalez-Bellido, Paloma T (författare)
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
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Ingår i: Current Biology. - : Elsevier BV. - 0960-9822 .- 1879-0445. ; 27:6, s. 854-859
- Relaterad länk:
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http://www.cell.com/...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Our visual system allows us to rapidly identify and intercept a moving object. When this object is far away, we base the trajectory on the target's location relative to an external frame of reference [1]. This process forms the basis for the constant bearing angle (CBA) model, a reactive strategy that ensures interception since the bearing angle, formed between the line joining pursuer and target (called the range vector) and an external reference line, is held constant [2-4]. The CBA model may be a fundamental and widespread strategy, as it is also known to explain the interception trajectories of bats and fish [5, 6]. Here, we show that the aerial attack of the tiny robber fly Holcocephala fusca is consistent with the CBA model. In addition, Holcocephala fusca displays a novel proactive strategy, termed "lock-on" phase, embedded with the later part of the flight. We found the object detection threshold for this species to be 0.13°, enabled by an extremely specialized, forward pointing fovea (∼5 ommatidia wide, interommatidial angle Δφ = 0.28°, photoreceptor acceptance angle Δρ = 0.27°). This study furthers our understanding of the accurate performance that a miniature brain can achieve in highly demanding sensorimotor tasks and suggests the presence of equivalent mechanisms for target interception across a wide range of taxa.
Ämnesord
- NATURVETENSKAP -- Biologi -- Etologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Behavioural Sciences Biology (hsv//eng)
Nyckelord
- flight
- interception strategy
- invertebrate
- moving target
- predation
- retina
- spatial resolution
- tracking
- vision
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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