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Finding the gap : A brightness-based strategy for guidance in cluttered environments

In English

Författare

Summary, in English

The ability to move safely between obstacles is critical for animals that fly rapidly through cluttered environments but surprisingly little is known about how they achieve this. Do they reactively avoid obstacles or do they instead fly towards the gaps between them? If they aim towards gaps, what information do they use to detect and fly through them? Here, we aim to answer these questions by presenting orchid bees with different apertures. When negotiating gaps, orchid bees locate and fly close to the point that gives themgreatest clearance from the edges. The cue that they use to pinpoint this spot is the brightness gradient formed across the aperture. Furthermore, we find that orchid bees also rely on brightness cues to locate gaps that are sufficiently large to negotiate safely. The advantage of using brightness for locating and negotiating gaps in a cluttered environment is that it provides information about the safest path through obstacles, at least in a forest environment. This brightness-based guidance strategy for gap detection and negotiation represents a fast, computationally simple and efficient mechanism to identify the clearest path through a forest and is, therefore, likely to represent a more general mechanism used by other animals.

Avdelning/ar

Publiceringsår

2016-04-06

Språk

Engelska

Publikation/Tidskrift/Serie

Royal Society of London. Proceedings B. Biological Sciences

Volym

283

Issue

1828

Dokumenttyp

Artikel i tidskrift

Förlag

Royal Society Publishing

Ämne

  • Evolutionary Biology
  • Zoology

Nyckelord

  • Brightness
  • Flight
  • Guidance
  • Insect
  • Orchid bee
  • Vision

Status

Published

Forskningsgrupp

  • Lund Vision Group

ISBN/ISSN/Övrigt

  • ISSN: 0962-8452