. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. I JUNE JULY AUGUST ICEHOUSE BEAROSLEY SPAULDING 114) r>. SEPT OCT FIGURE 6—Mean daily net primary production in study reservoirs, all years combined (sample size in parentheses). daily net primary production (June through October com- •aried the most between years in Spaulding, ranging from 92 in 1963 to 142 mgC m2 in 1964 and 172 mgC/m2 in 1965. varied less between years, averaging 294 mgC/m2 in 1961 mgC/m2 in 1966. Beardsley aver
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. I JUNE JULY AUGUST ICEHOUSE BEAROSLEY SPAULDING 114) r>. SEPT OCT FIGURE 6—Mean daily net primary production in study reservoirs, all years combined (sample size in parentheses). daily net primary production (June through October com- •aried the most between years in Spaulding, ranging from 92 in 1963 to 142 mgC m2 in 1964 and 172 mgC/m2 in 1965. varied less between years, averaging 294 mgC/m2 in 1961 mgC/m2 in 1966. Beardsley averaged 227 mgC/m2 in 1962, 210 in 1964. and 247 mgC/m2 in 1965. The mean values for all mbined (Table 3) were significantly different from one an- Mean bined \ CI / 9 Icehouse and 326 mgC/m2 years co other A decline in net production commonly has been associated with aging in other reservoirs. Measurements in the three study reservoirs do not indicate a decline in any of them. However, the data are not extensive enough to form firm conclusions in regard to production and aging. This is especially true of Icehouse Eeservoir. since sampling in 1961 did not begin until July 12. when spring phytoplankton blooms may have passed. The main groups of zooplankters to occur in the samples from each reservoir were Cladocera : Daphnia Bosmina eoregoni, Holopediuw gibberum; and Copepoda: both cyclopoid and calanoid types, and nauplii (Figure 7). Polyphemus pediculus occurred in a small number of samples in Beardsley only and is not included. Actually, rotifers were numerically the most abundant zooplankter in all the samples; however, they did not contribute significantly to the total weight of the 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
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