. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 104 CALIFORNIA PISH \Nl> GAME. FIGURE 3. Striped bass larvae shortly after hatching. Photograph by William E. Schafer, June 1963. Measurements of egg diameter and specific gravity were made in quarter stages of onx development, based upon a hatching time of 48 hours at 62°F. Drawings from Mansueti (1958a) aided in aging the collected eggs. The vertical distribution of developing bass eggs was studied by fishing three plankton nets
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 104 CALIFORNIA PISH \Nl> GAME. FIGURE 3. Striped bass larvae shortly after hatching. Photograph by William E. Schafer, June 1963. Measurements of egg diameter and specific gravity were made in quarter stages of onx development, based upon a hatching time of 48 hours at 62°F. Drawings from Mansueti (1958a) aided in aging the collected eggs. The vertical distribution of developing bass eggs was studied by fishing three plankton nets simultaneously at different depths and com- paring catches. Subsurface nets were fished slightly longer than the surface net, but the number of eggs collected per minute of sampling was determined for each ne1 and employed in calculating egg density at various depths. Ne1 sets ranged from 10 to 20 minutes in duration. "Water velocity was recorded with an Ott current meter. RESULTS Suspension of Developing Eggs In all laboratory experiments, eggs kepi suspended by air bubble agitation of the water hatched better than those allowed to rest on a substrate (Table 1). Eggs suspended in flasks without any substrate had a mean hatch of 81 percent, and eggs suspended over a gravel substrate had an average hatch of 61 percent. The lower hatch in the latter case may have been due to difficulties encountered in keeping eggs suspended over the gravel substrate. In comparison, no eggs al-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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