Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat
The anatomy of the eyes of several species of mesopelagic decapods (family Oplophoridae), obtained from the eastern north Atlantic, is described and related to the unique light environment of the deep seas. The oplophorid eyes are of the reflecting superposition type, but they show a number of regio...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0025315400048785 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400048785 |
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crcambridgeupr:10.1017/s0025315400048785 2024-09-15T18:23:34+00:00 Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat Gaten, E. Shelton, P. M. J. Herring, P. J. 1992 http://dx.doi.org/10.1017/s0025315400048785 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400048785 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 72, issue 1, page 61-75 ISSN 0025-3154 1469-7769 journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0025315400048785 2024-09-04T04:04:23Z The anatomy of the eyes of several species of mesopelagic decapods (family Oplophoridae), obtained from the eastern north Atlantic, is described and related to the unique light environment of the deep seas. The oplophorid eyes are of the reflecting superposition type, but they show a number of regional morphological variations. The main rhabdom, formed by retinula cells Rl to R7, comes in a variety of shapes, from fusiform rhabdoms in the dorsal region of the eyes of Oplophorus spinosus to multi-lobed interdigitating rhabdoms in deepwater species. The distal rhabdom, contributed to each ommatidium by retinula cell R8, gradually increases in size towards the ventral part of the eye in Systellaspis debilis and O. spinosus. Histological examination of the tapetum shows that it is incomplete dorsally in some species from the upper mesopelagic zone (S. debilis, O. spinosus), and that the amount of reflecting pigment in the tapetal cells increases in the ventral part of the eye. The tapetum is complete in some deep-water species (Systellaspis cristata, Acanthephyra kingsleyi, A. pelagica). These adaptations of the rhabdoms and tapeta are thought to be concerned with increased sensitivity to the dim up-welling irradiance and to bioluminescence. A dorsal accessory compound eye consisting of a small group of apparently functional apposition-type ommatidia is described. Article in Journal/Newspaper North Atlantic Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 72 1 61 75 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The anatomy of the eyes of several species of mesopelagic decapods (family Oplophoridae), obtained from the eastern north Atlantic, is described and related to the unique light environment of the deep seas. The oplophorid eyes are of the reflecting superposition type, but they show a number of regional morphological variations. The main rhabdom, formed by retinula cells Rl to R7, comes in a variety of shapes, from fusiform rhabdoms in the dorsal region of the eyes of Oplophorus spinosus to multi-lobed interdigitating rhabdoms in deepwater species. The distal rhabdom, contributed to each ommatidium by retinula cell R8, gradually increases in size towards the ventral part of the eye in Systellaspis debilis and O. spinosus. Histological examination of the tapetum shows that it is incomplete dorsally in some species from the upper mesopelagic zone (S. debilis, O. spinosus), and that the amount of reflecting pigment in the tapetal cells increases in the ventral part of the eye. The tapetum is complete in some deep-water species (Systellaspis cristata, Acanthephyra kingsleyi, A. pelagica). These adaptations of the rhabdoms and tapeta are thought to be concerned with increased sensitivity to the dim up-welling irradiance and to bioluminescence. A dorsal accessory compound eye consisting of a small group of apparently functional apposition-type ommatidia is described. |
format |
Article in Journal/Newspaper |
author |
Gaten, E. Shelton, P. M. J. Herring, P. J. |
spellingShingle |
Gaten, E. Shelton, P. M. J. Herring, P. J. Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
author_facet |
Gaten, E. Shelton, P. M. J. Herring, P. J. |
author_sort |
Gaten, E. |
title |
Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
title_short |
Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
title_full |
Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
title_fullStr |
Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
title_full_unstemmed |
Regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
title_sort |
regional morphological variations in the compound eyes of certain mesopelagic shrimps in relation to their habitat |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0025315400048785 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400048785 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 72, issue 1, page 61-75 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400048785 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
72 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
75 |
_version_ |
1810463802245775360 |