. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 273 NOTES ON SHARK SPECIES IN NEARSHORE WATERS NEAR POINT CONCEPTION, CALIFORNIA Ongoing quarterly biological surveys of the marine biota associated with a kelp bed near Point Conception have yielded data on local shark species inhabit- ing waters less than 18-m (60-ft) deep. Since September 1974, monofilament- multimesh and nylon twine singlemesh surface and bottom gill nets have been deployed at three distinct depths: m (2
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 273 NOTES ON SHARK SPECIES IN NEARSHORE WATERS NEAR POINT CONCEPTION, CALIFORNIA Ongoing quarterly biological surveys of the marine biota associated with a kelp bed near Point Conception have yielded data on local shark species inhabit- ing waters less than 18-m (60-ft) deep. Since September 1974, monofilament- multimesh and nylon twine singlemesh surface and bottom gill nets have been deployed at three distinct depths: m (25 ft), m (40 ft), and m (55 ft) near Cojo Anchorage, approximately 5 nautical miles southeast of Point Conception (Figure 1). Each "set" was 12-hr duration and each station was sampled for 2 days (~4 sets/station) every 3 months. Mesh sizes were to cm ( to inches) in ( increments). Each net was (80-ft) long and (8-ft deep). One surface and one bottom net were deployed simultaneously at each POINT CONCEPTION 25 FEET () '?S FEET () 55 FEET () GOVERNMENT POINT PACIFIC OCEAN SAMPLING STATIONS COJO ANCHORAGE 1974-1975 V. POINT V CONCEPTION T^^""^ -VLpS ANGELES COJO V* ANCHORAGE ^, ^ \ FIGURE 1. Sampling Stations, Cojo Anchorage—1974-1975 This discussion is based on 1-year's data. Continuing studies in the Cojo Anchorage area may well yield additional data, therefore, no conclusions will be drawn from this interim data synopsis. Only five shark species have been collected thus far. In order of overall abundance, they are: (i) Squalusacanthias, (ii) Cephaloscyllium ventriosum, (iii) Galeorhinus zyopterus, (iv) Triakis semi- fasciata, and (v) Squatina californica. The data indicate that spiny dogfish, 5. acanthias, is present in varying num- bers throughout the year (Table 1). Except in December 1974 and March 1975, females were more abundant than males. In June 1974, females outnumbered
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