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Visual summation in night-flying sweat bees: A theoretical study

Författare

Summary, in English

Bees are predominantly diurnal; only a few groups fly at night. An evolutionary limitation that bees must overcome to inhabit dim environments is their eye type: bees possess apposition compound eyes, which are poorly suited to vision in dim light. Here, we theoretically examine how nocturnal bees Megalopta genalis fly at light levels usually reserved for insects bearing more sensitive superposition eyes. We find that neural summation should greatly increase M. genalis's visual reliability. Predicted spatial summation closely matches the morphology of laminal neurons believed to mediate such summation. Improved reliability costs acuity, but dark adapted bees already suffer optical blurring, and summation further degrades vision only slightly. (c) 2006 Elsevier Ltd. All rights reserved.

Publiceringsår

2006

Språk

Engelska

Sidor

2298-2309

Publikation/Tidskrift/Serie

Vision Research

Volym

46

Issue

14

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Zoology

Nyckelord

  • halictid bees
  • neural summation
  • nocturnal vision
  • noise
  • apposition compound eyes

Status

Published

Forskningsgrupp

  • Lund Vision Group

ISBN/ISSN/Övrigt

  • ISSN: 1878-5646