File:California fish and game (20487380546).jpg

Title: California fish and game
Identifier: californiafishga64_2cali (find matches)
Year: [1] (s)
Authors: California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game
Subjects: Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons
Publisher: (San Francisco, etc. ) State of California, Resources Agency, Dept. of Fish and Game
Contributing Library: California Department of Fish and Game
Digitizing Sponsor: Internet Archive

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COLORADO CUTTHROAT TROUT TAXONOMY 101 Detailed morphometric data on western Salmo are generally lacking, and some authors (e.g. Schreck and Behnke 1971) feel that these characters have little discriminatory value in western Salmo taxonomy. However, comparing morphometric characteristics of 5. c. pleuriticus from Williamson Lakes with those of 5. gairdneri (Needham and Card 1959) and 5. apache (Miller 1972), we found that pleuriticus has a narrower head than both S. gairdneri and S. apache, and is shorter than 5. apache in occiput to snout tip length, head length, length of dorsal fin base, and pectoral and pelvic fin lengths. All 2J( specimens from Williamson Lakes had well developed basibranchial teeth (X = 12.5, range = 2-22). The teeth were arranged fairly uniformly, usu- ally in 1 to 3 anterior to posterior rows. The unusal glossohyal teeth, found occasionally on the undescribed redband trout and rarely on 5. aguabonita (Gold 1977), were not observed. Life colors and spotting of 5. c. pleuriticus irom Williamson Lakes are similar to those described by Behnke (1970, 1974) for 5. c. pleuriticus. The ventral region is a bright, almost gaudy crimson. Laterally, the colors become bronze- gold with overlying shades of light red. The blood-red cutthroat marks are conspicuous. Spots on the body are large, pronounced, and concentrated post- eriorly; they are most numerous on the caudal peduncle. Spots on the dorsal, anal, and particularly the caudal fins are numerous (Figure 1).
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Figure 1. S. c. pleuriticus from Williamson Lakes, California. Photograph by E. P. Pister, 1974. No apparent differences in meristic characters exist between 5. c. pleuriticus from Williamson Lakes and 5. c. pleuriticus ixom Wyoming, Colorado, and Utah (Table 3). In conjunction with the similarities in coloration and spotting, and the presence of basibranchial dentition, we conclude that the Williamson Lakes trout are a phenotypically pure population of 5. c. pleuriticus. We also note that the

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