Collection trips to Devil's Hole, v4441
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Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
C99 67-5 Trap Depth (ft.) Number Captured Remarks If a 19-20 note 1, 0> b 25 0 c 35 0 d 45 0 Note - Since all but the floata were weighted and lines tied to the west bank, the traplines were not vertical, but traps rested on the western slope to the lower shelf. If a - the 19-20' depth indicates generally that the rest of the line was nearly vertical, but that this trap rested on the edge of the small cliff or drop-off which is at approx. 28' before its sudden plunge to 45'. If a - Although no capture was made at this trap, a juvenile (approx. 12mm) was seen at the surface near this trap. Also, snail casings and dead dytiscids were present in the traps - presumably remains from trapping done at Saratoga Springs over a week earlier. Scum dispersed because of setting traps + seining. Water very clear - viewing device needed for by-passing scum. Time required to set traps because of tangling of lines & placing. Inner tubes used to place traps.