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Internship Opportunity

Pacific Lamprey from Marine Waters

Posted on: 12/14/2018

Summary / Description

Pacific lamprey (Entosphenus tridentata) are native to the rivers along the West Coast of North America, but their populations have declined dramatically in recent years for reasons that are largely unknown. There is a massive effort currently underway to help restore lamprey populations by understanding their habitat needs and fixing apparent bottlenecks, such as passage at mainstem dams and entrapement of ammocoetes (=larval lamprey) by water withdrawals. This effort was started by Columbia River Indian tribes (www.youtube.com/watch?v=RIsRfSoCvXA), with support from US Fish and Wildlife Service, the States, and fish conservation groups.
While this effort has greatly increased our understanding of lamprey while they are in freshwater, Pacific lamprey are anadromous (reproduces in freshwater but spends part of its life in the ocean) and very little is known about their marine existence. Major questions to be resolved include: where they go in the ocean, how long they stay in marine waters, what species they parasitize, how quickly they grow, and whether some aspects of their marine ecology have contributed to their decline. Ocean surveys run by NOAA Fisheries’ Northwest and Alaska Fisheries Science Centers and fishery observers on commercial vessels collected over 700 Pacific lamprey from marine waters in 2017 and an equivalent number in 2018. This collection represents a gold mine of information on the marine ecology of Pacific lamprey.
The goal of this internship is twofold: first, to process the lamprey collected in 2018 (which are frozen) and second, to do initial analysis on the generated data, with comparisons to data from 2017 collections. Processing the fish includes: recording collection information; take lengths and weights, measure and preserve stomach contents (for genetic analysis of diets), collect fin clips (for genetics), and remove heads for statolith analysis (structures similar to otoliths [fish ear bones] from which freshwater origin and age can be determined). Analysis will include: develop a length-weight relationship for ocean-caught lamprey; map the latitudes and longitudes of collected fish and use spatial statistics to examine distributional patterns; estimate growth rates and age of lamprey based on changes in size over time and size distributions.
There are also opportunities to participate in other projects that occur at HMSC.

Skills Required

Interest in biology and ecology, use dissecting gear, ability to follow a protocol, basic statistically/spreadsheet skills, able to work alone.


Newport, Oregon

Other Information

Intern Supervisor:
Laurie Weitkamp
Number of Slots Available:
Is free housing available:
Can international students be placed:


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