Terrestrial Vertebrate Monitoring, Channel Islands National Park, 1994 Annual Report
Schwemm CA. 1996. Terrestrial Vertebrate Monitoring, Channel Islands National Park, 1994 Annual Report. CHIS Technical Report 96-03
Amphibians and reptiles, deer mice (Peromyscus maniculatus), and island fox (Urocyon littoralis) were sampled to estimate abundance, population size and density on three islands from December 1993 to November 1994. Population index values were calculated for one salamander and two lizard species, whereas insufficient data was obtained to calculate such values for two additional lizard species. Weight/length regressions were performed for populations of the same three species. The discovery of Hanta virus in several of the island deer mouse populations halted further sampling until the summer season at which time it resumed only on Santa Barbara Island. Consequently, deer mouse populations were insufficiently sampled to provide estimates of density and population numbers on San Miguel and Anacapa islands in 1994. Island fox populations were sampled for population size and density on three grids on San Miguel Island, an increase of one grid from 1993. With only two years of sampling completed on these populations, no significant trends or changes are notable; however, this year's sampling provided important additions to the long-term database.
- Type
- Published Report
- Authors
- Schwemm, Catherine
- Date of Issue
- 1996-12
- Units
- CHIS , MEDN
- Keywords
- Amphibians (Amphibia), Anacapa Island, Animal Studies, CA, Channel Islands National Park, Deer Mouse (Peromyscus maniculatus), Deer Mouse Monitor, Island Fox Monitor, Island Gray Fox (Urocyon littoralis), Monitoring, Reptiles (Reptilia), San Miguel Island, Santa Barbara Island, Terrestrial Herpetofauna Monitor