. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. SEAWARD MIGRATION OP CHINOOK SALMON. 49 This is shown by the close correspondence in estimated size of the yearUngs at the timie of beginning the more rapid growth of the second year. This correspondence also indicates that the yearlings migrating in the spring are a homogeneous lot and that the check preceding the intermediate growth (in Groups i and 2) is the same as that pre- ceding the new growth (in Group 4); that is, that this check in both instances is in reality the winter band. (See discussion on p. 57.) The mode at 100 m
. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. SEAWARD MIGRATION OP CHINOOK SALMON. 49 This is shown by the close correspondence in estimated size of the yearUngs at the timie of beginning the more rapid growth of the second year. This correspondence also indicates that the yearlings migrating in the spring are a homogeneous lot and that the check preceding the intermediate growth (in Groups i and 2) is the same as that pre- ceding the new growth (in Group 4); that is, that this check in both instances is in reality the winter band. (See discussion on p. 57.) The mode at 100 mm. undoubtedly repre- sents, in the fall migrants, the size at the time of entering the estuary. It is possible that these differences in the estimated size at which the intermediate growth begins may be of value in determining, from the adult scales, the time at which migration took place. 130. Ix June July Aug. Sept. Oct. Nov. De Mqu Jun Jan. Feb. Mch. Apr. rj^ Year Unga. Graph 2.—Estimated length at time of beginning intennediate growth (groups i, 2, and 3) and new growth (group 4). Figures at left of graph indicate length of fish in mm.; a, group i; b, group 2; c, group 3; d, group 4; c, creek at Seufert, Oreg.; /, McKenzie River; and solid line, growth curve for group i (from fig. i). The rate of growth of the migrating fry in the Sacramento River is given in Table 47 and is shown in graph 3. Table 47.—Migrating Fry from Sacramento River. Date. Locality. Length. Date. Locality. Length. Mar. 5 Mm. 38-7 41. 2 4-S. I 57-5 May 15 Shag Slough Mm. Mar 8 May 16 Hass Slough 75- 2 do May 28 Sacramento River 30 miles above Sacramento. Cache Slough Elkhora Jime sand6 JiinpR Woods Break Pond near Butte Slough 95-6 June 241026 Tisdale wier May 8 and 9 Ponds near Knights Landing. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of th
Size: 1738px × 1437px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
