. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 216 CALIFORNIA FISH AND GAME. SCU£: 0 1000 iiobothi in feci FIGURE 1. Locations of study areas for visual fish observations at baited stations: CW60 = deep west control, CW30 = shallow west control, T60 = deep trestle site, T30 = shallow trestle site, CE60 — deep east control, CE30 = shallow east control. fishes. At the signal of the diver team leader, each diver began recording the nunnbers of each species of fish that entered the ci
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 216 CALIFORNIA FISH AND GAME. SCU£: 0 1000 iiobothi in feci FIGURE 1. Locations of study areas for visual fish observations at baited stations: CW60 = deep west control, CW30 = shallow west control, T60 = deep trestle site, T30 = shallow trestle site, CE60 — deep east control, CE30 = shallow east control. fishes. At the signal of the diver team leader, each diver began recording the nunnbers of each species of fish that entered the circle and within one meter of the bottom. The counts were recorded on a minute-by-minute basis for ten min- utes. The ten minute observation period was selected by using pre-survey data to plot numbers of fishes (all species) observed each minute for ten minutes at all stations. The resulting curve peaked at five minutes (Figure 2). Based on this curve we selected the ten minute observation period as a compromise between increasing the number of fishes that might occur with a longer observational pe- riod and the number of stations the divers could complete on a single tank of air. The divers also kept track of and recorded the total number of each species that entered the circle during the ten minute count. At the completion of the first count, the divers laid out a 30-m transect line due north of the first station. At the terminus of the 30-m transect, a second ten minute count was conducted. At the shallow study areas a third ten minute count was conducted 30-m west of the second station. At each station the divers also recorded depth, substrate type, presence of Macrocystis and Pterygophora, and horizontal visibilities as mea- sured on the transect tape. Immediately upon completion of the dives, the divers. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust
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