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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
W. Riemer
1949
Journal
17 Sept. Calif., Contra Costa Co., Pinehurst Objective
on this trip merely to observe condition
of stream and note development of
larvae of Triturus. One hour survey of
entire study area revealed: Growth
of plants during summer near stream
extensive whereas much of annual
cover away from stream now dry.
Stream level has dropped until in
upper portion of area most of water
confined to large disconnected pools.
In lower portion only a few small
muddy pools remain. Temp. of water
12.0°C; air 16.0°C. Only one larva
seen. In lower area 103.2-2.3 one
half-grown larva in murky pool
2 x 5 ft. X 8.5 cm. deep. Water striders
and beetles of various sorts present.
Larva wary and only brief glimpse
obtained while animal resting in
shallow water at edge of pool. Did
not reappear even after long wait.
24 Sept. Objective today was to note what changes
might have occurred in water level
during past week and to measure
a few larvae to determine degree of
development. Entire course of stream from
point 1-2.5 to a point about a quarter