Studying mating habits of a pair of tanner crabs. To calculate the sustainable
harvest that can be expected, biologists must have a thorough understanding
of the life history of a species and how it reacts to changes in the
environment.
Image ID: fish7921, NOAA's Historic Fisheries Collection Credit: NOAA Central Library Historical Fisheries Collection; P. 88 of "Our Changing Fisheries" 1970 Centenary NMFS centenary volume
