Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence

Bibliographic Details
Main Author:	Aseltine, Deborah Ann
Language:	English
Published:	The Ohio State University / OhioLINK 1982
Subjects:	Zoology
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1392107416

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu13921074162021-08-03T06:21:45Z Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence Aseltine, Deborah Ann Zoology <p>Within the barrier-reef lagoon off the northeast side of Andros Island, Bahamas, the distributions of the echinoids Tripneustes ventricosus and Lytechinus variegatus are different. Tripneustes predominantly occurs on limestone shelves and within exposed grassbeds where water flow is high and percent fines small. Lytechinus predominantly occurs within grassbeds in quiet waters where percent fines is high. Within one study area, however, both species co-occur on all three substrates studied. Thus, substrate alone can not be used to define the habitats of these urchins. Using a stepwise discriminant analysis, differences in habitat use by these two species can be characterized by sediments and hydraulic conditions. These variables also may influence the distribution of Tripneustes and Lytechinus. Water flow experiments in the field and laboratory document that the direction in which Lytechinus moves is determined by water flow. However, the intensity of ultraviolet light may influence whether this species does, in fact, move. The field experiments also suggest that both water flow and predation contribute to Lytechinus' absence from limestone shelves.</p> 1982 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1392107416 http://rave.ohiolink.edu/etdc/view?acc_num=osu1392107416 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Zoology
spellingShingle	Zoology Aseltine, Deborah Ann Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
author	Aseltine, Deborah Ann
author_facet	Aseltine, Deborah Ann
author_sort	Aseltine, Deborah Ann
title	Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
title_short	Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
title_full	Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
title_fullStr	Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
title_full_unstemmed	Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence
title_sort	tripneustes ventricosus and lytechinus variegatus (eschinoidea: toxopneustidae): habitat differences and the role of water turbulence
publisher	The Ohio State University / OhioLINK
publishDate	1982
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1392107416
work_keys_str_mv	AT aseltinedeborahann tripneustesventricosusandlytechinusvariegatuseschinoideatoxopneustidaehabitatdifferencesandtheroleofwaterturbulence
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Tripneustes ventricosus and Lytechinus variegatus (Eschinoidea: Toxopneustidae): habitat differences and the role of water turbulence

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