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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
E.L. Karlstrom
1954
Buffer loreuz (32)
May 28 Stoneman meadow, 4000 ft., Yosemite Valley, Mariposa Co.,
Caliy. in these pools. 11:50 P.M. I returned and
collected samples of tadpoles. One remnant of a pool
in the former ditch paralleling the footpath water
level was dry. 12:10°C.; air 10.5°C., 12:10 P.M. (D.S.) One small
pool 2' x 'x 2" deep contained ≅ 500-800 toad larvae
(few Hyla). I counted 40-50 dead at the puddle margin.
The pools in Pond A average 1" depth. Hundreds of
tadpoles (nearly all Hyla) are congregated where there
is water. Meadow hazy from all the comfics. No
breeze; gusses heavy with drops of dew. Weak Hyla
chasing. Constant traffic cars & people may inhibit them.
May 29 Cardinal meadow, ½ mi. S Gard. Center. Air max-min 12:30
P.M.
84-37°F.; present 50°. Soil max-min. 74-46° F. Present 52° F.
June 3 Stoneman mdw., 4000 ft., Yoz. Valley, Mariposa Co., Cali
Pond A now almost completely dry. The total amount
of water left in 3 shallow depressions would total
less than ½ gallon! Bottom of pool is still soggy
with water bound in the soil. Toads present ad floundering
in each tiny depression. The largest 15"x8"x 1" must
have less than 25 toads, mostly Hyla. Bird chasing
and the absence of dead toads over the bottom of the
pool point to extensive avian predation, probably robins.
Mosquitoes are thick. Time 7:05 P.M. All the water dry
and B (the ditch paralleling the footpath) has dried up
except for one small puddle 30"x16"x 1½" deep. She
is swimming with Bufro tods. Will collect samples
tonight when night check made of this meadow.