Note
Thesis (M.S.)--Florida Atlantic University, 2007.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
2007
EDTF Date Created
2007
Description
Species that are ontogenetic migrators have early life stages (juveniles) that live
shallower in the water column than the adults and therefore experience a brighter
environment than the adults. This work provides evidence that juveniles and adults of the
ontogenetically migrating crustacean species Gnathophausia ingens, Oplophorus
gracilirostris, and Systellaspis debilis have evolved visual adaptations to their respective
environments. The juveniles use apposition optics that provide greater resolution,
whereas the adults use superposition optics that maximize sensitivity. These animals also
have regional specializations to aid in viewing a light field that is brighter above than
below, such as accessory screening pigments located dorsally and superposition type
optics ventrally. The non-ontogenetic migrators Notostomus elegans and Notostomus
gibbosus possess superposition optics as both juveniles and adults, implying that the
changes seen in ontogenetic migrators are indeed visual adaptations.
shallower in the water column than the adults and therefore experience a brighter
environment than the adults. This work provides evidence that juveniles and adults of the
ontogenetically migrating crustacean species Gnathophausia ingens, Oplophorus
gracilirostris, and Systellaspis debilis have evolved visual adaptations to their respective
environments. The juveniles use apposition optics that provide greater resolution,
whereas the adults use superposition optics that maximize sensitivity. These animals also
have regional specializations to aid in viewing a light field that is brighter above than
below, such as accessory screening pigments located dorsally and superposition type
optics ventrally. The non-ontogenetic migrators Notostomus elegans and Notostomus
gibbosus possess superposition optics as both juveniles and adults, implying that the
changes seen in ontogenetic migrators are indeed visual adaptations.
Language
Type
Form
Extent
63 p.
Subject (Topical)
Identifier
FA00000854
Additional Information
Thesis (M.S.)--Florida Atlantic University, 2007.
Date Backup
2007
Date Created Backup
2007
Date Text
2007
Date Created (EDTF)
2007
Date Issued (EDTF)
2007
Extension
FAU
IID
FA00000854
Organizations
Attributed name: Florida Atlantic University
Person Preferred Name
Whitehill, Elizabeth A. G.
author
Graduate College
Physical Description
application/pdf
63 p.
Title Plain
Visual Adaptations of Ontogenetically Migrating Deep-Sea Crustaceans
Use and Reproduction
Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
http://rightsstatements.org/vocab/InC/1.0/
Origin Information
2007
2007
Florida Atlantic University
Boca Raton, Fla.
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
Visual Adaptations of Ontogenetically Migrating Deep-Sea Crustaceans
Other Title Info
Visual Adaptations of Ontogenetically Migrating Deep-Sea Crustaceans