. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. FOWL CHOLERA 189 The disease started in this city lake with fifteen to twenty ducks per day being' picked up. A decline in mortality to seven per day two weeks after the onset of the epizootic, and then in three weeks a sudden increase to 30 ducks a day mortality occurred. The losses continued until the beginning of Figure 47. The northward spread of fowl cholera in wild birds during the 1948-49 outbreak The death wave continu
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. FOWL CHOLERA 189 The disease started in this city lake with fifteen to twenty ducks per day being' picked up. A decline in mortality to seven per day two weeks after the onset of the epizootic, and then in three weeks a sudden increase to 30 ducks a day mortality occurred. The losses continued until the beginning of Figure 47. The northward spread of fowl cholera in wild birds during the 1948-49 outbreak The death wave continued to fan out as illustrated in the accom- panying map. Near Prospect and Ryer Islands on the Rio Farms of the delta 15 ducks were picked up in one hour along a drainage ditch. Mor- tality in this area dropped following the close of the season, and by the. 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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