Sponsor
Portland State University. Department of Biology
First Advisor
Leonard Simpson
Term of Graduation
Winter 1986
Date of Publication
3-14-1986
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Biology
Department
Biology
Language
English
Subjects
Chitons -- Habitat -- Oregon, Mollusks -- Habitat -- Oregon, Chitons -- Physiology, Salinity
DOI
10.15760/etd.5572
Physical Description
1 online resource (2, viii, 38 pages)
Abstract
Adult specimens of Katharina tunicata (mean weight = 10.23 grams) and Mopalia hindsii (mean weight = 10.90 grams) were tested for osmotic stress tolerance and oxygen consumption rates in a series of salinities (120%, 100%, 80%, 60%, and 40% seawater) at 11°C and 16L:8D photoperiod. K. tunicata and M. hindsii displayed similar trends in percent body weight variation and volume regulatory responses to osmotic stress. However, K. tunicata experienced a significantly higher percent body weight increase than did M. hindsii in response to hypo-osmotic conditions (80%, 60%, and 40% seawater). The mean rates of oxygen consumption per salinity for the two species were not significantly different. Both species, however, showed reduced oxygen consumption rates and significantly increased weight gain in 40% seawater. SEM comparisons of radulae, ctenidia, and shape of the pallial groove revealed no significant differences between the species relevant to differences observed in habitat selection.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
https://archives.pdx.edu/ds/psu/20716
Recommended Citation
Rostal, David Carl, "The Effect of Salinity on Habitat Selection of Two Oregon Chiton Species (Katharina Tunicata and Mopalia Hindsii)" (1986). Dissertations and Theses. Paper 3688.
https://doi.org/10.15760/etd.5572
Comments
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