File:A manual of fish-culture, based on the methods of the United States commission of fish and fisheries (1897) (14577615088).jpg

Identifier: manualoffishcult00unit (find matches)
Title: A manual of fish-culture, based on the methods of the United States commission of fish and fisheries
Year: 1897 (1890s)
Authors: United States. Bureau of Fisheries Brice, John J. (from old catalog) Moore, H. F. (Henry Frank), 1867-1948 Chamberlain, F. M. (Frederick M.)
Subjects: Fish culture Oyster culture Frogs
Publisher: Washington, Govt. print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
-hatched salmon is to burrowfor concealment, and this habit persists until the necessity for activefeeding compels them to come from their hiding-places. The retentionof salmon in troughs for a number of months after they begin to feednaturally leads to a considerable change in their instincts and makesthem less liable to escape from their enemies after being planted. Thefry are liberated on the natural spawning-grounds, as a rule, as soonas the umbilical sac is exhausted and they show a disposition to feedat the surface, When, for any reason, the fry are held longer, theirgrowth varies in accordance with the character and temperature of thewater in which they are reared and the food they receive. The youngfry reared at Baird station grow to a length of 2£ inches from the timewhen they begin to feed in February until the middle of May, when,on account of the rising temperature of the water, they are liberated inthe McCloud River. Report U. S. F. C. i 897. ^To face page 23 ) Plate 10.
Text Appearing After Image:
MANUAL OF FISH-CULTURE. 23 SALMON-HATCHING AT BATTLE CREEK. While the manner of taking and impregnating salmon eggs differsbut little at the hatchery of the United States Fish Commission atBattle Creek, California, from that at other places, the magnitude ofthe operations warrants separate description. This is now the most remarkable salmon-propagating station in theworld, the total number of eggs secured for hatching during the seasonof 1896 being 25,852,880, which is about 15,000,000 more than havebeen taken hitherto at any one station. This phenomenal take of eggswould have been still larger had not a flood washed away the rackand allowed the heavy run of salmon to pass upstream. This station is situated near the mouth of Battle Creek, a tributaryof the Sacramento, and although less than 40 miles below Baird station,receives the fall run of salmon only, while at Baird this run is light ascompared with the summer run. Immediately above its confluence with the Sacramento, Battle Cree

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