Reflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis)

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Reflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis). / Partridge, J. C.; Douglas, R. H.; Marshall, N. J.; Chung, W. -S.; Jordan, Thomas M; Wagner, H. -J.

In:

Proceedings of the Royal Society B: Biological Sciences

, Vol. 281, No. 1782, 20133223, 07.05.2014.

Research output: Contribution to journal › Article

Harvard

Partridge, JC, Douglas, RH, Marshall, NJ, Chung, W-S

, Jordan, TMReflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis)

‘,

Proceedings of the Royal Society B: Biological Sciences

, vol. 281, no. 1782, 20133223.

https://doi.org/10.1098/rspb.2013.3223

APA

Partridge, J. C., Douglas, R. H., Marshall, N. J., Chung, W. -S.

, Jordan, T. M.Reflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis)

.

Proceedings of the Royal Society B: Biological Sciences

,

281

(1782), [20133223].

https://doi.org/10.1098/rspb.2013.3223

Vancouver

Author

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@article{52fbabea28be4390b97fbe0f769d8f48,

title = “Reflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis)”,

abstract = “We describe the bi-directed eyes of a mesopelagic teleost fish, Rhynchohyalus natalensis, that possesses an extensive lateral diverticulum to each tubular eye. Each diverticulum contains a mirror that focuses light from the ventrolateral visual field. This species can thereby visualize both downwelling sunlight and bioluminescence over a wide field of view. Modelling shows that the mirror is very likely to be capable of producing a bright, well focused image. After Dolichopteryx longipes, this is only the second description of an eye in a vertebrate having both reflective and refractive optics. Although superficiallysimilar, the optics of the diverticular eyes of these two species of fish differ in some important respects. Firstly, the reflective crystals in theD. longipes mirror are derived from a tapetum within the retinal pigment epithelium, whereas in R. natalensis they develop from the choroidal argentea. Secondly, in D. longipes the angle of the reflective crystals varies depending on their position within the mirror, forming a Fresnel-type reflector, but in R. natalensis the crystals are orientated almost parallel to themirror’s surface and image formation is dependent on the gross morphology of the diverticular mirror. Two remarkably different developmental solutions have thus evolved in these two closely related species of opisthoproctid teleosts to extend the restricted visual field of a tubular eye and provide a well-focused image with reflective optics.”,

keywords = “Rhynchohyalus natalensis, vision, mirror optics, deep-sea, TUBULAR EYES, BIOLUMINESCENCE, VISION, OPTIMIZATION, SYSTEM, LIGHT, SKIN”,

author = “Partridge, {J. C.} and Douglas, {R. H.} and Marshall, {N. J.} and Chung, {W. -S.} and Jordan, {Thomas M} and Wagner, {H. -J.}”,

year = “2014”,

month = “5”,

day = “7”,

doi = “10.1098/rspb.2013.3223”,

language = “English”,

volume = “281”,

journal = “Proceedings of the Royal Society B: Biological Sciences”,

issn = “0962-8452”,

publisher = “The Royal Society”,

number = “1782”,

}

RIS – suitable for import to EndNote

TY – JOUR

T1 – Reflecting optics in the diverticular eye of a deep-sea barreleye fish (Rhynchohyalus natalensis)

AU – Partridge, J. C.

AU – Douglas, R. H.

AU – Marshall, N. J.

AU – Chung, W. -S.

AU – Jordan, Thomas M

AU – Wagner, H. -J.

PY – 2014/5/7

Y1 – 2014/5/7

N2 – We describe the bi-directed eyes of a mesopelagic teleost fish, Rhynchohyalus natalensis, that possesses an extensive lateral diverticulum to each tubular eye. Each diverticulum contains a mirror that focuses light from the ventrolateral visual field. This species can thereby visualize both downwelling sunlight and bioluminescence over a wide field of view. Modelling shows that the mirror is very likely to be capable of producing a bright, well focused image. After Dolichopteryx longipes, this is only the second description of an eye in a vertebrate having both reflective and refractive optics. Although superficiallysimilar, the optics of the diverticular eyes of these two species of fish differ in some important respects. Firstly, the reflective crystals in theD. longipes mirror are derived from a tapetum within the retinal pigment epithelium, whereas in R. natalensis they develop from the choroidal argentea. Secondly, in D. longipes the angle of the reflective crystals varies depending on their position within the mirror, forming a Fresnel-type reflector, but in R. natalensis the crystals are orientated almost parallel to themirror’s surface and image formation is dependent on the gross morphology of the diverticular mirror. Two remarkably different developmental solutions have thus evolved in these two closely related species of opisthoproctid teleosts to extend the restricted visual field of a tubular eye and provide a well-focused image with reflective optics.

AB – We describe the bi-directed eyes of a mesopelagic teleost fish, Rhynchohyalus natalensis, that possesses an extensive lateral diverticulum to each tubular eye. Each diverticulum contains a mirror that focuses light from the ventrolateral visual field. This species can thereby visualize both downwelling sunlight and bioluminescence over a wide field of view. Modelling shows that the mirror is very likely to be capable of producing a bright, well focused image. After Dolichopteryx longipes, this is only the second description of an eye in a vertebrate having both reflective and refractive optics. Although superficiallysimilar, the optics of the diverticular eyes of these two species of fish differ in some important respects. Firstly, the reflective crystals in theD. longipes mirror are derived from a tapetum within the retinal pigment epithelium, whereas in R. natalensis they develop from the choroidal argentea. Secondly, in D. longipes the angle of the reflective crystals varies depending on their position within the mirror, forming a Fresnel-type reflector, but in R. natalensis the crystals are orientated almost parallel to themirror’s surface and image formation is dependent on the gross morphology of the diverticular mirror. Two remarkably different developmental solutions have thus evolved in these two closely related species of opisthoproctid teleosts to extend the restricted visual field of a tubular eye and provide a well-focused image with reflective optics.

KW – Rhynchohyalus natalensis

KW – vision

KW – mirror optics

KW – deep-sea

KW – TUBULAR EYES

KW – BIOLUMINESCENCE

KW – VISION

KW – OPTIMIZATION

KW – SYSTEM

KW – LIGHT

KW – SKIN

U2 – 10.1098/rspb.2013.3223

DO – 10.1098/rspb.2013.3223

M3 – Article

VL – 281

JO – Proceedings of the Royal Society B: Biological Sciences

JF – Proceedings of the Royal Society B: Biological Sciences

SN – 0962-8452

IS – 1782

M1 – 20133223

ER –

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