. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 236 CALIFORNIA FISH AND CAME North Cove: Of nine nests, the first appeared on 16 December and peak nesting occurred on 25 March with five guarded nests present. Nest deposition occurred through April. One guarded nest was present in the study site area until 17 May. Depths ranged from to m. Shady Cove: Fourteen nests were observed at Shady Cove. The first ap- peared 4 January and peak nesting occurred on 2 March with 11 nests
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 236 CALIFORNIA FISH AND CAME North Cove: Of nine nests, the first appeared on 16 December and peak nesting occurred on 25 March with five guarded nests present. Nest deposition occurred through April. One guarded nest was present in the study site area until 17 May. Depths ranged from to m. Shady Cove: Fourteen nests were observed at Shady Cove. The first ap- peared 4 January and peak nesting occurred on 2 March with 11 nests present. Nest deposition occurred until 2 March and males were present on nests until early April. Depths ranged from to m. <0 0) E. 1978-1979 1979-1980 FIGURE 2. Number of lingcod nest sitings by month. Predation Most nests incurred some form of predation, usually by invertebrates feeding upon the exposed peripheral layer of eggs. Diatom flora was present on many of the egg masses during later stages of development. Guarded, unguarded, and loose nests had present upon them one or both of the gastropods Amphissa columbiana and Calliostoma ligatum. No active de- fense of the nest against these organisms was observed, although the stomachs of several male lingcod examined in the sport fishery during another study in the spring of 1979 and 1980 contained several Amphissa sp. and Callistoma sp. as well as some lingcod eggs. Moulton (1977) also found these two gastropods in the stomachs of lingcod recovered by hook and line in the winter period. Predators observed upon guarded nests were hermit crabs, Pagurus sp., the sharp-nose crab, Scyra acutifrons, the scalyhead sculpin, Artedius harringtoni, and the Puget Sound rockfish, Sebastes emphaeus. Predators observed on un- guarded nests included the red sea urchin, Strongylocentrotus franciscanus, the pyple sea urchin, 5. purpuratus, hermit crabs, and some small unidentified. Please note that these images are extracted fr
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