First giant otter distribution survey in the southeast of Roraima, Brazil, with notes on the OSG Guidelines for a Standardization of Survey Methods

Emanuela Evangelista, Chiara Tosi

Abstract


A distribution survey of giant otter was conducted for the first time in the southeast corner of Roraima, bordering  the state of Amazonas, in Brazil (1° 4' S, 61°36' O). The region has recently been recognized as a protected area and is currently elaborating its own management plan. Our survey was carried out according to the guidelines for a standardisation of survey methods as recommended by the IUCN/SSC Otter Specialist Group. The short expedition covered two squares of 100x100km on the UTM grid and interested tree different river basins, investigating black-water as well as white-water watercourses. With the aim of contributing to the optimisation of the standard survey methodology, we carried out some field tests during the survey and present the results in this paper. The expedition revealed the presence of giant otter in all the basins investigated and recorded a series of human activities that may represent a threat to the species survival in the future. Although the results presented are preliminary, we discuss the implication of the presence of the giant otter in the region from a conservation perspective and provide suggestions for the protected area management plan.

Keywords


Pteronura brasiliensis, distribution survey method, apex predator, Roraima, Lower Rio Branco APA

Full Text:

PDF

References


Albert, J.S. and Reis, R.E., Eds (2011) Historical Biogeography of Neotropical Freshwater Fishes. University of California Press, Berkeley, California, USA. http://dx.doi.org/10.1093/sysbio/syr113

Azevedo-Ramos, C., Domingues do Amaral, B., Nepstad, D.C., Soares Filho, B. and Nasi, R. (2006) Integrating ecosystem management, protected areas and mammal conservation in the Brazilian Amazon. Ecology and Society 11(2): 17.

Carrera-Ubidia, P.M. (2007) Giant otters (Pteronura brasiliensis) and humans in the Lower Yasuní basin, Ecuador: spacio-temporal activity patterns and their relevance for conservation. M.Sc. Wildlife Science Thesis. Department of Fisheries and Wildlife, Oregon State University. Corvallis, Oregon, USA. 244 pp.

Davenport, L.C. (2008) Behavior and ecology of the giant otter (Pteronura brasiliensis) in oxbow lakes of the Manu Biosphere Reserve, Peru. Ph.D. Dissertation. University of North Carolina at Chapel Hill, North Carolina, USA. 244 pp.

Duplaix, N., Evangelista, E. and Rosas, F.C.W. (2015) Advances in the study of giant otter (Pteronura brasiliensis) ecology, behavior, and conservation: a review. The Latin American Journal of Aquatic Mammals 10(2): 71-94. http://dx.doi.org/10.5597/lajam00200

Evangelista, E. (2004) Change of partners in a giant otter alpha couple. IUCN Otter Specialist Group Bulletin 21(1): 1-5.

Evangelista, E. and Rosas, F.C.W. (2011a) The home range and movements of giant otters (Pteronura brasiliensis) in the Xixuau Reserve, Roraima, Brazil. IUCN Otter Specialist Group

Bulletin 28A: 31–37.

Evangelista, E. and Rosas, F.C.W. (2011b) Breeding behavior of giant otter (Pteronura brasiliensis) in the Xixuau Reserve, Roraima, Brazil. IUCN Otter Specialist Group Bulletin 28A:

-10.

Groenendijk, J. and Hajek, F. (2004) Giant Otter Project in Peru: Field Trip and Activity Report - 2003. IUCN Otter Specialist Group Bulletin 21(1): 40–46.

Groenendijk, J., Hajek, F., Duplaix, N., Reuther, C., Van Damme, P., Schenck, C., Staib, E., Wallace, R., Waldemarin, H., Notin, R., Marmontel, M., Rosas, F., De Mattos, G.E., Evangelista, E., Utreras, V., Lasso, G., Jacques, H., Matos, K., Roopsind, I. and Botello, J.C. (2005) Surveying and monitoring distribution and population trends of the giant otter (Pteronura brasiliensis) – Guidelines for a standardisation of survey methods as recommended by the Giant Otter Section of the IUCN/SSC Otter Specialist Group. Habitat 16:1-100.

Küchler, I.L., Miekeley, N. and Forsberg, B.R. (2000) A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil. Journal of the Brazilian Chemical Society 11(3): 286-292. http://dx.doi.org/10.1590/S0103-50532000000300015

Naka, L.N., Cohn-Haft, M., Mallet-Rodrigues, F., Santos, M.P.D. and Torres, M. F. (2006) The avifauna of the Brazilian state of Roraima: bird distribution and biogeography in the Rio Branco basin. Revista Brasileira de Ornitologia 14(3): 197-238.

Prance, G.T. (1979) Notes on the vegetation of Amazonia III. The terminology of forest types subject to inundation. Brittonia31: 26-38. doi: http://dx.doi.org/10.2307/2806669

Ritchie, E.G. and Johnson, C.N. (2009) Predator interactions, mesopredator release and biodiversity conservation. Ecology Letters 12: 982–998. http://dx.doi.org/10.1111/j.1461-0248.2009.01347.x

Rosas, F.C.W., Zuanon, J.A.S. and Carter, S.K. (1999) Feeding ecology of the giant otter, Pteronura brasiliensis. Biotropica 31: 502-506. http://dx.doi.org/10.1111/j.1744-7429.1999.tb00393.x

Tosi, C. and Evangelista, E. (2011) Interaction between giant otter (Pteronura brasiliensis) and fresh-water Amazon dolphin (Inia geoffrensis). Hystrix, The Italian Journal of Mammalogy (n.s.) supp. (2011): 119.




DOI: http://dx.doi.org/10.5597/lajam00206

Refbacks

  • There are currently no refbacks.




footer_lajam_eb_540_540