Defense Date


Document Type


Degree Type

Master of Science

Degree Name

Marine Science

First Advisor

Mahmood Shivji, Ph.D

Second Advisor

Andrea Bernard, Ph.D

Third Advisor

George Duncan, Ph.D


Genetics, Elasmobranch, AMOVA, Genes, Management, Endangered, Conservation


This study provides the first genomics-level, population structure and genetic diversity assessment of the shortfin mako (Isurus oxyrinchus) shark. The assessments were based on mitogenome sequences from makos distributed throughout the Atlantic Ocean, with Pacific mako mitogenomes used as a comparative outgroup. In addition to complete mitogenome-based analyses, I assessed individual mitochondrial coding gene and non-coding (Control Region) sequences for their comparative resolution properties as markers for revealing matrilineal population structure and genetic diversity. Sequencing of 125 makos in the western and eastern Atlantic across northern and southern hemispheres yielded 92 complete mitogenomes (16,698-16,702 bp) and 33 partial mitogenome sequences (522-12,489 bp). Analyses revealed significant (p