Comparative anatomy and biology of two species of the asteroid genus pisaster

<p>Interest in the endemic Pisaster was first aroused by the great variation of external color in Pisaster ochraceus. This in turn led to observations of the diversity of the spinous patterns of this sea star. Following the suggestion of Dr. Jool D. hedgepeth it was decided to make an extensive comparison of the common species of Pisaster.</p><p>Detailed comparison between Pisaster brevispinus and Pisaster ochraceus have been made only by Fisher (1930) and Verrill (1914). Both of these investigators restricted their observations largely to the endoskeleton and its calcareous protuberances. In addition to analyzing the work of Fisher, an attempt to differentiate between the two species regarding behaviour, tolerances, gross anatomy and natural history has been made. In addition some mention of the relationships with other members of the family Asteriidae is recorded in this study.</p>

Name thesis:degree_name

Master of Arts (M.A.)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Biological Sciences

Year dc:date.available

1963

Author dc:creator

• Mayer, Norman William

Contributors dc:contributor

• Joel W. Hedgpeth

• Starfishes
• Biology
• Life Sciences

Licence

• http://rightsstatements.org/vocab/NKC/1.0/

Repository record dc:identifier

https://scholarlycommons.pacific.edu/uop_etds/1548

OAI identifier oai:identifier

oai:scholarlycommons.pacific.edu:uop_etds-2547