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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ANALYSIS OF TRAWL CATCHES 111 Thus, the catches from area 1 show a moderate affinity with those from areas 2 and 3, and a very low affinity with those from area 4. Also, most of the coefficients are found to be less than 50 when areas 2 and 3 are compared with area 4. A mean coefficient of 25.2 is obtained when area 2 is compared with area 4, indicating that the catches from these two areas have a low affinity with one another, and the catches from areas 3 and 4 show a moderate degree of affinity as indicated by the mean coefficent of 41.3.
Text Appearing After Image:
FIGURE 2. Trellis diagram comparing fish catches taken in the four study areas. A Black square represents a coefficient of community of 50 or more, a blank square one of less than 50. When areas 2 and 3 are compared, most of the coefficients are found to be greater than 50, and a mean coefficient of 51.9 is obtained from this comparison. Thus, examination of the trellis diagram and the mean coefficients of community indicates that three distinctly different species assemblages are defined in the four study areas. These differences are undoubtedly caused primarily by differ- ences in the bathymetric ranges of the areas studied. Similar differences in fish populations with depth were described by Stephens, et al. (1973).

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