Title: California fish and game
Identifier: californiafishga38_4cali (find matches)
Year: [1] (s)
Authors: California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game
Subjects: Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons
Publisher: (San Francisco, etc. ) State of California, Resources Agency, Dept. of Fish and Game
Contributing Library: California Department of Fish and Game
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
538 CALIFORNIA FISH AND GAME strip of plastic four inches wide is fastened to the bottom of the measur- ingr board. As eacli fish is slid onto the board, its nose is placed against the board's head block and its tail over the plastic. A short pencil mark on the plastic records the length to the fork of the tail fin; a different mark is used for each species. AVhile one man examines for marks and slides the fish onto the measuring- board, the other man records length and species, and slides the fish in a position ready for cutting to the butchers. Transposing tlie pencil marks on the plastic strip into a length fre- quency record is done later at the sampler's leisure with the aid of a transparent plastic template accurately inscribed at half centimeter intervals. This template is placed over the strip of marked plastic, and the number of pencil marks between each two lines on the template is totaled and recorded at the proper length interval on a record sheet. For example, the template is so placed tliat the mark for a fish which would measure exactly 70 centimeters falls at the midpoint of the space similarly labeled on the template. Marked fish are put aside for a more complete examination when time permits. Scales are taken to establish the age of the fish, and thus serve as a check on the validity of the mark. The place and date of recovery is recorded, as well as the weight of the fish, length, sex and species. Also recorded is the particular combination of missing fins and the per- centage of regeneration. The above data are recorded on an envelope in
Text Appearing After Image:
FIGURE 1. Aluminum measuring board for salmon sampling. The shape is such that fish slide readily into position. The snout is held against the wooden block and a pencil mark is made on the plastic sheet to indicate the length of the fish. The millimeter and inch rules are not used in routine length frequency sampling. The inch rule is convenient when some bystander wonts to know the length of a fish. Photograph by D. H. Fry, Jr.

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