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Keywords: eye
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Journal Articles
J Exp Biol (2020) 223 (2): jeb217133.
Published: 22 January 2020
... systems. In this study, we analyzed the visual spectral sensitivity of the Chilean recluse spider Loxosceles laeta , a synanthropic species posing a significant threat to humans, using electroretinogram recordings of its three eye types and open field tests with localized chromatic illumination...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (11): jeb175802.
Published: 4 June 2018
...John D. Kirwan; Josefine Graf; Jochen Smolka; Georg Mayer; Miriam J. Henze; Dan-Eric Nilsson ABSTRACT Onychophorans, also known as velvet worms, possess a pair of simple lateral eyes, and are a key lineage with regard to the evolution of vision. They resemble ancient Cambrian forms, and are closely...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (6): 915–922.
Published: 15 March 2015
...Holger Beckmann; Lars Hering; Miriam J. Henze; Almut Kelber; Paul A. Stevenson; Georg Mayer ABSTRACT Onychophorans typically possess a pair of simple eyes, inherited from the last common ancestor of Panarthropoda (Onychophora+Tardigrada+Arthropoda). These visual organs are thought to be homologous...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (22): 4190–4195.
Published: 15 November 2013
...Kevin van Doorn; Jacob G. Sivak SUMMARY The eyes of snakes are shielded beneath a layer of transparent integument referred to as the ‘reptilian spectacle’. Well adapted to vision by virtue of its optical transparency, it nevertheless retains one characteristic of the integument that would otherwise...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (20): 3577–3586.
Published: 15 October 2012
... sensitivity in the proximal retinas of both principal eyes of these larvae. As expected from their microvillar orientation, cells of type T1 are most sensitive to vertically polarized light, while cells of type T2 are most sensitive to horizontally polarized light. In addition, T3 cells probably constitute...
Journal Articles
J Exp Biol (2012) 215 (8): 1278–1286.
Published: 15 April 2012
...Ajna S. Rivera; Nuri Ozturk; Bryony Fahey; David C. Plachetzki; Bernard M. Degnan; Aziz Sancar; Todd H. Oakley SUMMARY Many larval sponges possess pigment ring eyes that apparently mediate phototactic swimming. Yet sponges are not known to possess nervous systems or opsin genes, so the unknown...
Journal Articles
J Exp Biol (2011) 214 (21): 3524–3531.
Published: 1 November 2011
...Srdjan Maksimovic; John E. Layne; Elke K. Buschbeck SUMMARY The principal eyes of sunburst diving beetle, Thermonectus marmoratus , larvae are among the most unusual eyes in the animal kingdom. They are composed of long tubes connecting bifocal lenses with two retinas: a distal retina situated...
Journal Articles
J Exp Biol (2009) 212 (24): 4010–4018.
Published: 15 December 2009
... , and the blacknose shark, Carcharhinus acronotus . Additionally, eye rotation and head yaw were quantified to determine if species compensate for large blind areas anterior to the head. The winghead shark possessed the largest anterior binocular overlap (48 deg.) and was nearly four times larger than...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2009) 212 (23): 3781–3794.
Published: 1 December 2009
...Srdjan Maksimovic; Tiffany A. Cook; Elke K. Buschbeck SUMMARY Larvae of the sunburst diving beetle, Thermonectus marmoratus , have a cluster of six stemmata (E1-6) and one eye patch on each side of the head. Each eye has two retinas: a distal retina that is closer to the lens, and a proximal retina...
Journal Articles
J Exp Biol (2008) 211 (24): 3879–3888.
Published: 15 December 2008
.... Retin. Eye Res. 11 , 1 -32. Dann, S. G., Allison, W. T., Levin, D. B., Taylor, J. S. and Hawryshyn, C. W. ( 2004 ). Salmonid opsin sequences undergo positive selection and indicate an alternative evolutionary relationship in Oncorhynchus. J. Mol. Evol. 58 , 400 -412. Dartnall, H. J...
Journal Articles
J Exp Biol (2007) 210 (16): 2819–2828.
Published: 15 August 2007
...Srdjan Maksimovic; John E. Layne; Elke K. Buschbeck SUMMARY Compound eyes are typically composed of hundreds to thousands of ommatidia,each containing 8–10 receptors. The maximal spatial frequency at which a compound eye can sample the environment is determined by the inter-ommatidial angle. Males...
Journal Articles
J Exp Biol (2006) 209 (19): 3758–3765.
Published: 1 October 2006
...Melissa M. Coates; Anders Garm; Jamie C. Theobald; Stuart H. Thompson; Dan-Eric Nilsson SUMMARY Box jellyfish, or cubomedusae (class Cubozoa), are unique among the Cnidaria in possessing lens eyes similar in morphology to those of vertebrates and cephalopods. Although these eyes were described over...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2005) 208 (2): 261–265.
Published: 15 January 2005
... with laterally placed eyes use monocular cues, such as the accommodative state of their eye, to determine their separation from an object( Collett and Harkness, 1982 ). However eyes with a single small aperture have a large depth of field,minimising the need for accommodation. Consequently animals...
Journal Articles
J Exp Biol (2003) 206 (8): 1409–1417.
Published: 15 April 2003
... © The Company of Biologists Limited 2003 2003 otolith ocellus eye ascidian larva swimming behavior Ascidians are considered chordates, because their tadpole-like larvae share a basic body plan with those of vertebrates( Sorrentino et al., 2000 ; Corbo et al., 2001...
Journal Articles
J Exp Biol (1992) 170 (1): 57–69.
Published: 1 September 1992
...JAN-OLOF SEYER The winkle Littorina littorea (L.) has camera-type (simple) eyes. Light and electron microscopy were used to generate an accurate geometrical model of the eye, and this was used to predict the eye's visual performance. The lens is spherical with a diameter of 112 μm, and examination...
Journal Articles
J Exp Biol (1990) 148 (1): 221–233.
Published: 1 January 1990
...M. F. LAND; D.-E. NILSSON Macrocypridina lives at depths of 800 m, where residual daylight is very weak. It has a pair of mobile apposition compound eyes with large lenses, wide rhabdoms and high acceptance angles, all of which contribute to a calculated sensitivity comparable...
Journal Articles
J Exp Biol (1983) 107 (1): 293–310.
Published: 1 November 1983
...HOWARD L. GILLARY Following amputation of the eye of Strombus luhuanus , a morphologically equivalent one is regenerated. Early regenerates exhibited a relatively simple, single-peaked electroretinogram (ERG) that progressively matured to display two ‘on’ peaks, a ‘steady state’ during sustained...