. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. <;<; CALIFORNIA PISH AND GAME handle filler for handle spring barrel- trigger plunger Otolith Punch Ss3. /T\ zn& r 41 front side /cocked for Waking otoliths ) FIGURE 1—Construction details of the punch used to remove otoliths from steelhead trout and other large salmonids. 1lirough the plunger at the bottom of the slot. The plunger was then removed and the cutting end of the barrel sharpened. Finally, the spring was placed i
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. <;<; CALIFORNIA PISH AND GAME handle filler for handle spring barrel- trigger plunger Otolith Punch Ss3. /T\ zn& r 41 front side /cocked for Waking otoliths ) FIGURE 1—Construction details of the punch used to remove otoliths from steelhead trout and other large salmonids. 1lirough the plunger at the bottom of the slot. The plunger was then removed and the cutting end of the barrel sharpened. Finally, the spring was placed in the barrel, followed by the plunger, which was sufficiently depressed to permit the rod to be centered through the hole. The otolith puneh was now completed. By compressing the spring and rotating the plunger so the rod caught in the hooked ends of the slots, the punch could be cocked. USE OF THE OTOLITH PUNCH Taking otoliths by this technique depended on cutting the core from the appropriate area of the cranium. The scales of salmonids end in a broad "V" shape at the nape (Figure 2). When the core was taken just anterior to the "V," the region of the cranial cavity directly above the sagittae was exposed. The tip of the puneh was allowed just to break through the skull so that a core was withdrawn without forcing. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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License: Licensed
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Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
