Reproduction and population genetics of the New Zealand brooding brittle star Ophiomyxa brevirima
Garrett, Frank Kim

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Garrett, F. K. (1994). Reproduction and population genetics of the New Zealand brooding brittle star Ophiomyxa brevirima (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/2962
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http://hdl.handle.net/10523/2962
Abstract:
A study of the reproductive mechanism of the brooding brittle star Ophiomyxa brevirima (H. L. Clark) was first undertaken. Isozyme electrophoresis was employed to uncover the genetic relationship of parent to offspring, aiding interpretation of the observed genetic structures of populations separated by geographic distance. The genetic structure of four intertidal populations of this ophiuroid was investigated by examination of variation at seven polymorphic loci. Mean levels of heterozygosity ranged from 0.238 to 0.332. Hardy-Weinberg equilibrium was observed at all but one locus in all populations. Values of Nei's unbiased genetic identity (I), distance (D) and standardised genetic variation between populations (F(ST)) were used to analyse the connectedness of populations assessed. These values suggested moderate connectivity between populations. Measures of genotypic diversity were used to interpret the degree of clonal structuring within each population.
Date:
1994
Advisor:
Mladenov, Philip; Wallis, Graham
Degree Name:
Master of Science
Degree Discipline:
Marine Science
Publisher:
University of Otago
Research Type:
Thesis
Languages:
English
Notes:
x, 133 leaves :ill. (some col.) :30 cm. Includes bibliographical references. "December 1994." University of Otago department: Marine Science
Collections
- Marine Science [171]
- Thesis - Masters [3332]