Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Current
Biennial Report

What’s New
At NPRB?

Home

OUR PROGRAMS

Science Foundation

Core Program

Integrated Ecosystem Research

Northern Bering Sea

Arctic Program

Bering Sea Project

Gulf of Alaska Project

Long-Term Monitoring Program

Outreach Program

Graduate Student Research Awards

Project search

News & Events

Contact Us

About NPRB
  • Menu Item 1
  • Menu Item 2
  • Menu Item 3
  • Menu Item 4
  • Menu Item 5
  • Menu Item 6
  • Menu Item 7

Title Goes Here

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the

Title Goes Here

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the

by Wyatt Fournier from the Northwest Explorer


Fish samples for this survey are collected using a mid-water rope trawl that has been modified to fish at the surface by stringing buoys along the head rope. This allows us to catch juvenile and larval fish of our focal species that utilize the upper portion of the water column. In the Gulf of Alaska, this also means we catch a lot of Pacific salmon. During this leg, we have caught all five species of Pacific salmon: Chinook, sockeye, coho, chum and pink. The dominant species is the pink salmon, also known as the “humpy” due to its morphology during maturation. This short-lived species has been forecasted to be abundant this year, partially due to successful hatcheries in Prince William Sound.

Today we were reminded why the Gulf of Alaska has such an abundance of salmonids, as our trawl intercepted a school of adult coho salmon with stomachs that were bursting with prey. Note the size of the removed stomach relative to the body length of the adult Coho (left pic). After dissecting the stomachs, the prey items were identified as capelin, an energy-rich forage fish. Our very next tow caught a large school of capelin (right pic) from which we sampled individuals that will be brought back to the laboratory for caloric content analysis.

http://www.nprb.org/assets/images/uploads/blog/coho_n_capelin.jpg