. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. KLAMATH RIVER STEELHEAD 207 fish. The number of years spent in the stream appears on the left-hand side of a diagonal line and the number of years in the ocean on the right-hand side of the line. For example, steelhead with an indicated age of 2/1 have spent 2 years in the stream, and 1 year in the ocean. The majority of the steelhead sampled were captured during the fall months, well before they had completed their current year's gro
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. KLAMATH RIVER STEELHEAD 207 fish. The number of years spent in the stream appears on the left-hand side of a diagonal line and the number of years in the ocean on the right-hand side of the line. For example, steelhead with an indicated age of 2/1 have spent 2 years in the stream, and 1 year in the ocean. The majority of the steelhead sampled were captured during the fall months, well before they had completed their current year's growth. For the study, the year of capture is considered a full year's growth. For example, a 2/1 fish has been given an age of 3 years, even though its third year represents only a few months in the FIGURE 3. Scale of a 2/1 Klamath River half-pounder. Note the small amount of growth achieved during the first year of life. The year of life in which steelhead smolts enter the sea usually includes both stream and ocean growth. For purposes of clarity and convenience, and because the greatest amount of growth is achieved in the ocean, a year of mixed stream and ocean growth has been indi- cated as ocean growth. All readable scales were measured so that lengths at annuli and other positions of importance could be back-calculated. All readable scales were examined to determine if spawning checks were present at annuli. In this study, an area of moderate to heavy lateral and anterior resorption is considered a spawning check. Small amounts of lateral resorption may appear at almost any annulus of the steelhead scale, but we believe that such resorption does not indicate a spawning-maturation check. Stomach and gonad samples were analyzed by standard techniques. Temperature and flow data were obtained from the U. S. Geological Survey, Eureka, California. A computer program was used in the length-weight regression analysis (Swingle, 1964). The scale radius- length regression anal
Size: 1980px × 1262px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
