Caucaia do Alto (pitfall traps)
Basic information
Sample name: Caucaia do Alto (pitfall traps)
Reference: F. Umetsu, L. Naxara, and R. Pardini. 2006. Evaluating the efficiency of pitfall traps for sampling small mammals in the Neotropics. Journal of Mammalogy 87(4):757-765 [ER 850]
Geography
Country: Brazil
State: São Paulo
Coordinate: 24° 44' S, 47° 3' W
Latlng basis: estimated from map
Geography comments: five sites were in the Morro Grande Reserve and the others were to the west
altitude 850 to 1100 m
altitude 850 to 1100 m
Environment
Habitat: tropical/subtropical dry broadleaf forest
Substrate: ground surface
MAT: 19.0
MAP: 1350.0
Habitat comments: "a transition between the coastal Atlantic rain forest and the Atlantic semideciduous forest, classified as 'Lower Montane Atlantic Rain Forest'"; 23 of 26 sites were in "secondary forest from 50 to 80 years old"
mean max/min 27/11
rainfall 1300 to 1400 mm and is "seasonably variable"
mean max/min 27/11
rainfall 1300 to 1400 mm and is "seasonably variable"
Methods
Life forms: rodents, other small mammals
Sites: 26
Sampling methods: drift fences, pitfall traps
Sample size: 1420 individuals
Years: 2002 - 2005
Days: 74
Nets or traps: 11
Net or trap nights: 462
Basal area status: not applicable
Sampling comments: at each of the 26 sites there was "a 100-m sequence of 11 pitfall traps... connected by a 500-mm-tall plastic drift fence"; pitfall trap sessions totalled 74 days and 462 trap nights
Metadata
Sample no: 1202
Contributor no: John Alroy
Enterer: John Alroy
Created: 2015-02-14 19:54:52
Modified: 2015-02-14 08:57:12
Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
28 species
2 singletons
total count 1420
geometric series index: 37.5
Fisher's α: 4.944
geometric series k: 0.8101
Hurlbert's PIE: 0.8805
Shannon's H: 2.4161
Good's u: 0.9986
Register
| Marmosops incanus (gray slender opossum) | 254 | 52.2 g |
| Didelphis aurita (big-eared opossum) | 86 | 1.1 kg |
| Monodelphis americana (northern three-striped opossum) | 66 | 36.0 g |
| Gracilinanus microtarsus (Brazilian gracile opossum) | 41 | 33.4 g |
| Monodelphis scalops (long-nosed short-tailed opossum) | 11 | 52.0 g |
| Philander frenatus (southeastern four-eyed opossum) | 3 | |
| Lutreolina crassicaudata (big lutrine opossum) | 2 | 586.0 g |
| Monodelphis sp. | 2 | |
| Monodelphis sorex (southern red-sided opossum) | 2 | 35.3 g |
| Marmosops paulensis (Brazilian slender opossum) | 1 | 52.6 g |
| Oligoryzomys nigripes (black-footed pygmy rice rat) | 295 | 17.7 g |
| Akodon montensis (montane grass mouse) | 179 | 35.7 g |
| Delomys sublineatus | 151 | |
| Sooretamys angouya | 106 | |
| "Oryzomys angouya" | ||
| Brucepattersonius aff. soricinus | 63 | 33.0 g |
| Euryoryzomys russatus | 63 | |
| "Oryzomys russatus" | ||
| Thaptomys nigrita | 32 | 21.2 g |
| Juliomys pictipes | 17 | |
| Oxymycterus dasytrichus | 11 | |
| Phyllomys nigrispinus | 11 | |
| Calomys tener | 9 | 10.6 g |
| Rhagomys rufescens | 3 | |
| Rhipidomys cf. mastacalis | 3 | 66.2 g |
| Bibimys labiosus | 2 | 30.8 g |
| Necromys lasiurus (hairy-tailed bolo mouse) | 2 | |
| "Bolomys lasiurus" | ||
| Cavia aperea | 2 | 530.0 g |
| Nectomys squamipes | 2 | 224.0 g |
| Blarinomys breviceps | 1 | 22.0 g |