Restricted range of ocular accommodation in barn owls (Aves:Tytonidae)

Howland H.C., Rowland M.J., Schmid K. and Pettigrew J.D. (1991) Restricted range of ocular accommodation in barn owls (Aves:Tytonidae). Journal of Comparative Physiology A, 168 3: 299-303. doi:10.1007/BF00198349

Author Howland H.C.
Rowland M.J.
Schmid K.
Pettigrew J.D.
Title Restricted range of ocular accommodation in barn owls (Aves:Tytonidae)
Journal name Journal of Comparative Physiology A   Check publisher's open access policy
ISSN 0340-7594
Publication date 1991
Sub-type Article (original research)
DOI 10.1007/BF00198349
Volume 168
Issue 3
Start page 299
End page 303
Total pages 5
Publisher Springer-Verlag
Subject 2802 Behavioral Neuroscience
2800 Neuroscience
2737 Physiology (medical)
1314 Physiology
1103 Clinical Sciences
Abstract In an examination of the focusing abilities of 15 species of owls, the North American barn owl, Tyto alba pratincola (Bonaparte 1838), was an outstanding accommodator, having a range of accommodation exceeding 10 diopters (Murphy and Howland 1983). Using comparable methods, we examined the accommodation of 4 specimens of the Australian barn owl, Tyto alba delicatula (Gould 1837). We failed to elicit accommodation greater than two diopters, and most stimuli failed to evoke any discernable accommodation at all. Furthermore, examination of other Australian tytonid owls, the grass owl, T. longimembris, the sooty owl, T. tenebricosa, and both the mainland and Tasmanian subspecies of the masked owl, T. novaehollandiae novaehollandiae and T. novaehollandiae castanops, also failed to reveal anything but very moderate accommodative ranges. We conclude that the outstanding accommodative ability of the American barn owl is truly an exception to the modest accommodative abilities of the tytonid owls generally.
Keyword Accommodation
Near vision
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
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Citation counts: Scopus Citation Count Cited 8 times in Scopus Article | Citations
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