Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
E. Heske
1981
Journal
January
6.4mi NE El Machin to Oaxaca, Oaxaca, Mexico
Arose ~0700. Sunny, very cold but warming fast. There is frost on the trap boxes, etc. Wind ~30-40 mph.
I caught 7 P. melanocarpus and 1 Reithrodon tomys. One of the Peromyscus died in the trap (hypothermia).
The results were somewhat disappointing - my first 20 traps were set in an area with numerous large mossy logs + only yielded 1 capture (a double capture - 1 large & P. melanocarpus and a smaller subadult or (possibly from last litter?). Traps set in more open "corridors" and at tree bases were notably unvisited. Most of the captures were from a couple dense thicket areas. Duke caught 10 mice on his 40-trap line: 6 P. melanocarpus, 3. P. tomasi, 1 Drytomys (alfaroi-type?) - 4 died in traps (all P. melanocarpus). The 20 traps in the drier slope yielded 4 P. melanocarpus, 1 of which died in trap.
After breakfast, we continued S on Hwy 175, looking for a site where David wants to look for herps. Rd. on right at town of La Cumbre, ~20 km N of Oaxaca. Top of mt. range has lots of pine-oak forest - looks like good trapping area, although some steep slopes. S side of range dry, some cacti, trees thinner. The area we looked for herps in has pine-oak but trees are smaller (DBH < 1ft), dry leaf litter + needles on floor, no herbaceous growth (but some brush in open crevas), mossy logs. Didn't find any lizards, but found 12 salamanders, primarily under