Friday April 17, 2026
NOAA —
Blood, guts, and gore! Those words sound like a review for a horror movie, but it’s actually the basis of my field work. I’ve been looking at and evaluating a lot of fish guts for the Cooperative Research Branch Conversion Factor Project.
Giving Groundfish Conversion Factors a Refresh
Many fish are gutted at sea, which means the internal organs are removed to prevent spoiling. Once these fish are offloaded from a commercial trip, scientists apply a conversion factor to the gutted weight to convert it to a whole weight which they use to evaluate the abundance of a fish stock. As the ocean changes, fluctuations in temperature and shifting prey availability impact fish metabolism and physiology. That can cause changes in average fish size and weight.