Early development of eye and retina in lanternfish larvae

Early development of eye and retina in lanternfish larvae

14 pages, 9 figures, 3 tables

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Bibliographic Details
Main Authors: Bozzano, Anna, Pankhurst, Patricia M., Sabatés, Ana
Format: artículo biblioteca
Language:English
Published: Cambridge University Press 2007-05-03
Subjects:Larvae, Myctophidae, Eye shape, Retina, Development,
Online Access:http://hdl.handle.net/10261/18296
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spelling dig-icm-es-10261-182962019-03-06T14:04:25Z Early development of eye and retina in lanternfish larvae Bozzano, Anna Pankhurst, Patricia M. Sabatés, Ana Larvae Myctophidae Eye shape Retina Development 14 pages, 9 figures, 3 tables The morphological characteristics of the eyes and the retinae of lanternfish larvae of Lampanyctus crocodilus, Benthosema glaciale, and Myctophum punctatum were analyzed in pre-flexion, flexion, and post-flexion stages. Pre-flexion larvae of L. crocodilus, the species with the shallowest depth distribution, had spherical eyes located antero-laterally on a strongly laterally-compressed head, suggesting a forward binocular visual field. B. glaciale and M. punctatum larvae live deeper in the water column and had eyes elongated in the dorsal-ventral plane. The eyes of B. glaciale were prominent, projecting slightly outward from a laterally-compressed head, suggesting a strongly laterally-directed visual field. M. punctaum had stalked elongated eyes projecting from a dorso-ventrally flattened head. The eyes can be freely rotated allowing lateral, anterior and dorsally-directed vision. A prominent choroidal gland was situated beneath the ventral portion of the eye in M. punctatum and B. glaciale, while a smaller gland was present in the dorsal and ventral portions of the eye of L. crocodilus. In pre-flexion stage larvae, the retina of all three species was differentiated with numerous rod photoreceptors in the peripheral retinal areas and fewer cone photoreceptors mainly distributed in the central retina. This distribution suggests concomitant enhancement of scotopic sensitivity in the vertical visual plane and improved photopic acuity in the lateral and forward visual directions. The concurrent development of cones and rods, as observed in the pre-flexion stage of myctophid larvae, is consistent with meeting the special demands of visual planktivory in sub-surface waters. During larval development a gradual increase of ROS length was also accompanied by a progressive loss of cones that were almost totally absent in post-flexion larvae. This can be interpreted as an adaptive response to an impending deep mesopelagic adult life. This work was supported by the European Union in the framework of the MAST Program (MAS-CT96-0051) and by a Spanish grant (REN 2002-013390MAR). Peer reviewed 2009-11-04T12:25:10Z 2009-11-04T12:25:10Z 2007-05-03 artículo http://purl.org/coar/resource_type/c_6501 Visual Neuroscience 24, 423–436 (2007) 0952-5238/07 http://hdl.handle.net/10261/18296 10.10170S0952523807070484 en http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=1317648&fulltextType=RA&fileId=S0952523807070484 none 22195 bytes application/pdf Cambridge University Press
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Larvae
Myctophidae
Eye shape
Retina
Development
Larvae
Myctophidae
Eye shape
Retina
Development
spellingShingle Larvae
Myctophidae
Eye shape
Retina
Development
Larvae
Myctophidae
Eye shape
Retina
Development
Bozzano, Anna
Pankhurst, Patricia M.
Sabatés, Ana
Early development of eye and retina in lanternfish larvae
description 14 pages, 9 figures, 3 tables
format artículo
topic_facet Larvae
Myctophidae
Eye shape
Retina
Development
author Bozzano, Anna
Pankhurst, Patricia M.
Sabatés, Ana
author_facet Bozzano, Anna
Pankhurst, Patricia M.
Sabatés, Ana
author_sort Bozzano, Anna
title Early development of eye and retina in lanternfish larvae
title_short Early development of eye and retina in lanternfish larvae
title_full Early development of eye and retina in lanternfish larvae
title_fullStr Early development of eye and retina in lanternfish larvae
title_full_unstemmed Early development of eye and retina in lanternfish larvae
title_sort early development of eye and retina in lanternfish larvae
publisher Cambridge University Press
publishDate 2007-05-03
url http://hdl.handle.net/10261/18296
work_keys_str_mv AT bozzanoanna earlydevelopmentofeyeandretinainlanternfishlarvae
AT pankhurstpatriciam earlydevelopmentofeyeandretinainlanternfishlarvae
AT sabatesana earlydevelopmentofeyeandretinainlanternfishlarvae
_version_ 1777665699418734592

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