Biology Colloquium - Dr. Joshua Reece

Biology Colloquium - Dr. Joshua Reece

Postby cdouglas » Mon Sep 26, 2016 8:18 am

Department of Biology

Dr. Joshua Reece
Department of Biology, Fresno State

“Phylogenetic reconstructions of deep-water sharks: things just ain't what they seem. Again.”

Friday, September 30, 2016
3:00 PM
Science 2, Room 109

ABSTRACT. The genus Squalus includes about thirty species of sharks, commonly known as spurdogs. Several of these species are commercially harvested and listed as Vulnerable by the IUCN. Most Squalus species are deep-water sharks. Historically, marine biologists have considered the deep ocean to be ecologically homogenous. In fact, many deep-water species have near global distributions, suggesting tremendous dispersal capabilities and/or a lack of ecological barriers to dispersal. Here, we used molecular phylogenetics to ask two simple questions: 1) Are species of the genus Squalus “good” species, or are there cryptic species throughout the genus? And 2) is there evidence that the most morphologically similar and/or geographically clustered groups are also each other’s closest relatives phylogenetically? This talk will explore yet another example of molecular phylogenetics rewriting taxonomy and our understanding of the deep ocean and species boundaries.

For further information: or phone 278-2001. If you need a disability-related accommodation or wheelchair access information, please contact Lindasue Garner at the Department of Biology @ 278-2001 or e-mail (at least one week in advance of event).
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