[All-postdocs] Biology Seminar this Thursday: Dr. Mark Royer, University of Hawai’i Mānoa

[Margot McKlveen]

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*Biology Department Virtual Seminar*

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Thursday, April 15 at Noon

Zoom link: https://us02web.zoom.us/j/87694076875 
<https://us02web.zoom.us/j/87694076875>


Dr. Mark Royer

University of Hawai’i Mānoa, Hawai’i Institute of Marine Biology PhD 
Graduate (2020)


Deep Secrets of the Scalloped Hammerhead Shark – Evidence of a 
Marine-Mammal Like Dive Reflex

Abstract: Temperature is one of the most important factors affecting the 
distribution, behavior, and physiological performance of animals. Some 
marine ectotherms move between thermal environments to take advantage of 
foraging habitats and select optimal ambient temperatures for 
bioenergetic efficiency. We used a novel package of telemetry devices to 
compare the thermoregulatory strategies of two large-bodied ectothermic 
sharks, the bluntnose sixgill and the scalloped hammerhead, as they move 
between drastically different thermal environments. These two species 
use highly contrasting approaches to achieve the same goal of broadening 
their thermal niche presumably enabling them to exploit resources that 
would otherwise be off limits. Large body masses allow adult bluntnose 
sixgill sharks to exploit thermally disparate habitats through simple 
thermal inertia. In contrast, scalloped hammerhead sharks employ a 
complex, marine-mammal-like ‘breath holding’ technique to reduce heat 
loss when they conduct rapid deep dives into cold water.



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Meeting ID: 876 9407 6875

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-- 
Margot McKlveen | she/her
Senior Administrative Assistant
Woods Hole Oceanographic Institution
Redfield Building Room 305 | MS 32
266 Woods Hole Rd.
Woods Hole, MA 02543
508-289-2334
mmcklveen at whoi.edu

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