You are here

FAU Collections » FAU Research Repository » FAU Theses and Dissertations

Morphology of Astarte borealis (Mollusca: bivalvia) of Camden bay, northern Alaska

Download pdf | Full Screen View

Date Issued:
2013
Summary:
The genus Astarte is known for variable shell morphology and polymorphism within living and fossil species. Astarte borealis, the most common living species, is recognizable and common among mid-to-high latitude North Pacific, Arctic Ocean and North Atlantic waters, and has been divided into many subspecies and varieties based on overall shell shape. A collection of recent A. borealis specimens from Camden Bay, northern Alaska (641 specimens) with outline intact were used for analyses. Bivariate analysis of height vs. length and morphometric analysis of shell outline determined variants within a population of A. borealis, and then compared to Pliocene A. borealis and Oligocene A. martini. The computer program SHAPE uses elliptic Fourier coefficients of shell outline to evaluate and visualize shape variations. The multivariate outline analysis indicates that A. borealis intraspecies variation is based upon a common shape that grades into other shapes, rather than grade between two or more end-forms.
Title: Morphology of Astarte borealis (Mollusca: bivalvia) of Camden bay, northern Alaska.
416 views
334 downloads
Name(s): Chrpa, Michelle E., author
Oleinik, Anton E., Thesis advisor
Charles E. Schmidt College of Science, Degree grantor
Department of Geosciences
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: single unit
Date Created: Fall 2013
Date Issued: 2013
Publisher: Florida Atlantic University
Physical Form: Online Resource
Extent: 109 p.
Language(s): English
Summary: The genus Astarte is known for variable shell morphology and polymorphism within living and fossil species. Astarte borealis, the most common living species, is recognizable and common among mid-to-high latitude North Pacific, Arctic Ocean and North Atlantic waters, and has been divided into many subspecies and varieties based on overall shell shape. A collection of recent A. borealis specimens from Camden Bay, northern Alaska (641 specimens) with outline intact were used for analyses. Bivariate analysis of height vs. length and morphometric analysis of shell outline determined variants within a population of A. borealis, and then compared to Pliocene A. borealis and Oligocene A. martini. The computer program SHAPE uses elliptic Fourier coefficients of shell outline to evaluate and visualize shape variations. The multivariate outline analysis indicates that A. borealis intraspecies variation is based upon a common shape that grades into other shapes, rather than grade between two or more end-forms.
Identifier: FA0004010 (IID)
Note(s): Includes bibliography.
Thesis (M.S.)--Florida Atlantic University, 2013.
Subject(s): Bivalves -- Alaska -- Camden Bay -- Geographical distribution
Mollusks, Fossil -- Alaska -- Camden Bay -- Morphology
Held by: Florida Atlantic University Digital Library
Sublocation: Boca Raton, Fla.
Persistent Link to This Record: http://purl.flvc.org/fau/fd/FA0004010
Restrictions on Access: All rights reserved by the source institution
Restrictions on Access: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU