. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. EFFECT OF MINING SILT ON YIELD OF FRY FROM SALMON BEDS 39 earlier silt additions extending back into the incubation period pro dueed progressively lower yields which reached beginning of the incubation period. In this undeveloped eggs thai were coated and preset steadily with earlier and longer periods of si fish that hatched failed to emerge but many forward through a screen rather than upward deposited silt. zero with silting at the
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. EFFECT OF MINING SILT ON YIELD OF FRY FROM SALMON BEDS 39 earlier silt additions extending back into the incubation period pro dueed progressively lower yields which reached beginning of the incubation period. In this undeveloped eggs thai were coated and preset steadily with earlier and longer periods of si fish that hatched failed to emerge but many forward through a screen rather than upward deposited silt. zero with silting at the series the number of ved with silt increased It addition. Very few fry apparently worked through the gravel and <nV^3 ESS SILT EMERGENCE PERIODS YIELD 1 BASKET INCUBATION M„ 'PERIOD OF EXPERIMENT- DAYS NESTI FINAL PERCENT YIELD OF FRY FROM EGGS. Fir:. 17. Graphic summary showing- 19 nests of the experiment, with days to emer- gence of first fry, total emergence periods, and yield from each nest of unsilted gravels (Trough 1) and silted gravels (Troughs 2 and 3) as com- pared with hatching time of 30-38 days in hatchery baskets ("Basket Incubation") which yielded fry. Delayed emergence and decreased yields are particularly evident for Trough '1, with early silt 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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