Estimating Pelagic Longline Bycatch
Over the years, Dr. C. Phillip Goodyear, TBF’s billfish scientist has developed “species distribution models” for highly migratory species that estimate time-varying, three-dimensional distribution of habitat. These models are useful in estimating abundances, visualizing stock boundaries and estimating abundance from catch per unit of effort. They incorporate a wide range of biological and environmental data. Examples include depth, annual average estimated total chlorophyll by latitude and longitude, water temperature and oxygen by latitude, longitude, and depth by month and year. This year, Goodyear and a team of scientists led by Elizabeth Babcock, demonstrated that a bycatch estimation tool, created
