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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
EL Karlstrom
1955
Bufo boreas
July 20
6 mi W Elberts Pass, 7700 ft., Owyhee Co. Calif.
9:10 A.M. Tadpoles discovered in a small meadow
seygore pond. Kodakhine #10 taken from NW
1/8th at 59. Meadow sure NW x SE 120 yards
by 30-40 yds wide. Lodgepole pine - set for
association. A small trickling creek were length
of low gradient meadow, averaging 2' width
but holes to 14-16 " deep. Rora adult numerous.
Ambystoma macrodetylum under logs edge of
boggy meadow. Pond irregularly shaped 25 x 8'
with max depth 8" middle. Water clear but
half broken by green grasses to 16" height.
Would appear to be a single food hotel.
Larvae find legs developed, are large - to 1"
total length. Water temp. 14.6° C. at 9:20 1"
below surface. Air temp. 1" above damp grass
18.2° C. Hydra present but few in number.
Rora adult in pond. Predation on tadpoles?
Total toad population may be less than 500
Common morning flower predominant meadow bloom
scattered corn lilies. Bottom of pool muck and
adsilt. He tadpoles well spread out, it took
Paul Elberts and me over 1/2 hour to collect 30-40
tadpoles. They were carried out in a carton.
No sign of adults under logs meadow margin.
Again B. boreas does not appear to be found
at higher elevations. This locality puts bores
within 5 miles of Iviey's 1952 corrine locality