The effects of sex ratios other than one-to-one on survival estimates produced by Murphy's method of estimating third-year survival of silver (coho) salmon (Oncorhynchus kisutch) are discussed. Techniques are described for determining sex of fingerling king (chinook) salmon (O. tshawytscha) over 40 mm in total length by gross gonad examination. Sex composition of 970 fingerling king salmon at the Coleman National Fish Hatchery was 490 males and 480 females. Evidence is presented which suggests that fish cultural practices may alter the initial sex ratio among propagated silver salmon stocks.
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