Working on Alaska pinniped projects during the SAFS-MML internship

Each year, UW students embark on the SAFS-NOAA Marine Mammal Laboratory internship program, spending a month or so working on projects related to marine mammals such as whale, seals, sea lions and porpoises. Project topics include marine mammal behavior, population dynamics, life history, migration patterns, distribution, and trends in abundance, with research taking place with the Marine Mammal Laboratory, a division of the  NOAA Alaska Fisheries Science Center (AFSC). This year during June to August, two students – Kenna Daily (ESRM) and Sofia Denkovski (Marine Biology) – split their time working on two Alaska pinniped projects: remote camera imagery and food habits.

Under the mentorship of Molly McCormley from AFSC, they helped assess the efficacy of NOAA’s machine learning model for detecting Steller sea lions in digital images. They manually reviewed over 21,000 images of Steller sea lions rookery sites in the Aleutian Islands, marking locations of branded sea lion individuals which will be compared to observations found by the machine learning model.

NOAA
Screenshot of the PhotoCount program used by Kenna and Sofia to review remote camera images for marked Steller sea lions. Known individuals are marked with a letter or symbol (indicates where they were born) and a unique number. In this example, Steller sea lion ~176 (behavior = Unknown) was identified in an image taken 26 May 2018 on Attu Island, Alaska.

While being mentored by Katie Luxa, also from AFSC, Kenna and Sofia processed ~300 frozen Steller sea lion and northern fur seal diet samples (i.e., scats and spews). The fish otoliths, bones, and squid beaks they recovered from samples are now ready to be identified by Marine Mammal Lab staff. They also helped prep northern fur seal vibrissae for stable isotope analysis and inventoried over 1,600 cephalopod specimens in the Lab’s food habits reference collection.

NOAA
Photo of fish bones in a metal sieve. This was part of a very large spew (regurgitation) sample from a Steller sea lion (Eumetopias jubatus) that was processed by Sofia. There were several different species present; the large V-shaped bone in the middle is a lower jaw from a wolffish (family Anarhichadidae).

In addition to their research tasks, Kenna and Sofia used this unique opportunity to connect with other MML and Alaska Fisheries Science Center researchers, setting up one-on-one meetings to learn more about their study animals and research projects. Their mentors reported that Kenna and Sofia did a fantastic job. They were enthusiastic, their work was impeccable, and they asked excellent questions, with both students being invited to stay on as part-time (<4 hrs/week) lab volunteers.

Interested in previous SAFS-MML interns? Read their stories here

 

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