Use of Peninsula Valdes (Patagonia Argentina) by migrating Red Knots (Calidris canutus rufa)
Luciana R. Musmeci A B D , María de los Ángeles Hernández A C , Luis O. Bala A C and José A. Scolaro A CA Centro Nacional Patagónico, Boulevard Brown 2915 (U9120ACV), Puerto Madryn, Argentina.
B Fundación Patagonia Natural, Marcos A. Zar 760 (U9120ACV), Puerto Madryn, Argentina.
C Universidad Nacional de la Patagonia San Juan Bosco, Boulevard Brown 3700 (U9120ACV), Puerto Madryn, Argentina.
D Corresponding author. Email: lumusmeci@cenpat.edu.ar
Emu 112(4) 357-362 https://doi.org/10.1071/MU10079
Submitted: 22 October 2010 Accepted: 16 June 2011 Published: 3 September 2012
Abstract
Red Knots (Calidris canutus rufa) that winter in southern South America stop on Peninsula Valdes, Patagonian Argentina, on their northern passage. The Peninsula comprises two large gulfs, each of which has two high and two low tides per day; high tides in San José Gulf correspond to low tides in Nuevo Gulf and vice versa. We conducted weekly censuses of Red Knots on several beaches on these gulfs between March and May in 2006 and 2007 and observed marked individuals. We undertook an aerial survey of the coasts of the two gulfs each April. The use of the different beaches on the two gulfs by Red Knots varied significantly in both years of the study, and the patterns of use differed between 2006 and 2007. In both years, maximum numbers of Red Knots were counted in April. Observations of marked individuals confirmed that Red Knots use more than one beach on Peninsula Valdes, and on one occasion marked individuals were seen on the same day using beaches on both gulfs, thereby maximising their foraging time. Our observations suggest that Peninsula Valdes is an important place on the northern migration route of Red Knots.
Additional keywords: beach use, conservation, ecology, migration, stopover.
References
Baker, A. J., González, P. M., Piersma, T., Minton, C. D. T., Wilson, J. R., Sitters, H., Graham, D., Jessop, R., Collins, P., de Goeij, P., Peck, M., Lini, R., Bala, L., Pagnoni, G., Vila, A., Bremer, E., Bastida, R., Ieno, E., Blanco, D., De Lima Serrano Do Nascimiento, I., Scherer, S. S., Schneider, M. P., Silva, A., and Rodrigues, A. A. F. (1999). Northbound migration of Red Knots Calidris canutus rufa in Argentina and Brazil: report on results obtained by an international expedition in March–April 1997. Wader Study Group Bulletin 88, 64–75.Baker, A. J., González, P. M., Piersma, T., Niles, L. J., de Lima Serrano do Nascimento, I., Atkinson, P. W., Clark, N. A., Minton, C. D. T., Peck, M. K., and Aarts, G. (2004). Rapid population decline in Red Knots: fitness consequences of decreased refuelling rates and late arrival in Delaware Bay. Proceedings of the Royal Society of London. Series B, Biological Sciences 25, 125–129.
Bala, L. O., Hernández, M. A., and D’Amico, V. L. (2001a). The importance of Fracasso Beach (Peninsula Valdes, Argentina) as a stop-site used by migrating shorebirds. Wader Study Group Bulletin 95, 22.
Bala, L. O., D’Amico, V. L., and Hernández, M. A. (2001b). Changes in patterns of wetland utilization by the Red Knot, Calidris canutus rufa, in Peninsula Valdes: a need or an approximation to the optimum? Wader Study Group Bulletin 95, 21.
Bala, L. O., D’Amico, V. L., and Stoyanoff, P. (2002). Migrating shorebirds at Peninsula Valdes, Argentina: report for the year 2000. Wader Study Group Bulletin 98, 6–9.
Blanco, D. E., Pugnali, G. D., and Rodríguez Goñi, H. (1992). La importancia de Punta Rasa, Provincia de Buenos Aires, en la migración del chorlo rojizo Calidris canutus. Hornero 13, 203–206.
Cohen, J. B., Karpanty, S. M., Fraser, J. D., and Truitt, B. R. (2010). The effect of benthic prey abundance and size on Red Knot (Calidris canutus) distribution at an alternative migratory stopover site on the US Atlantic Coast. Journal fur Ornithologie 151, 355–364.
| The effect of benthic prey abundance and size on Red Knot (Calidris canutus) distribution at an alternative migratory stopover site on the US Atlantic Coast.Crossref | GoogleScholarGoogle Scholar |
Escudero, G., Abril, M., Murga, M. G., and Henández, N. (2003). Red Knots wintering in Bahía Bustamante, Argentina: are they lost? Wader Study Group Bulletin 101/102, 59–61.
Gillings, S., Atkinson, P. W., Baker, A. J., Bennett, K. A., Clark, N. A., Cole, K. B., González, P. M., Kalasz, K. S., Minton, C. D. T., Niles, N. J., Porter, R. C., De Lima Serrano, I., Sitters, H. P., and Woods, J. L. (2009). Staging behaviour in Red Knot (Calidris canutus) in Delaware Bay: implications for monitoring mass and population size. Auk 126, 54–63.
| Staging behaviour in Red Knot (Calidris canutus) in Delaware Bay: implications for monitoring mass and population size.Crossref | GoogleScholarGoogle Scholar |
Hernández, M. A. (2007). Ecología trófica del Playero Rojizo (Calidris canutus rufa), Playero de Rabadilla Blanca (Calidris fuscicollis) y Playero Blanco (Calidris alba) en Península Valdés. Phd dissertation. Universidad Nacional del Comahue. San Carlos de Bariloche, Argentina.
Hernández, M. A., Bala, L. O., and Musmeci, L. R. (2010). Optimización del tiempo de alimentación por parte del Playero Rojizo (Calidris canutus rufa) en Valdés Península, Patagonia Argentina. Ornitologia Neotropical 21, 445–451.
Morrison, R. I. G., and Ross, R. K. (1989). Atlas of Nearctic Shorebirds on the Coast of South America. Special Publication, Canadian Wildlife Service, Ottawa, ON.
Morrison, R. I. G., Ross, R. K., and Niles, L. J. (2004). Declines in wintering populations of Red Knots in southern South America. Condor 106, 60–70.
| Declines in wintering populations of Red Knots in southern South America.Crossref | GoogleScholarGoogle Scholar |
Musmeci, L. R. (2005). Evaluación de playa Colombo (Península Valdés, Chubut) por la utilización de las aves playeras migratorias. Ph.D. Thesis, Universidad Nacional de la Patagonia San Juan Bosco, Puerto Madryn, Argentina.
Niles, L. J., Sitters, H. P., Dey, A. D., Atkinson, P. W., Baker, A. J., Bennett, K. A., Carmona, R., Clark, K. E., Clark, N. A., Espoz, C., Gonzalez, P. M., Harrington, B. A., Hernandez, D. E., Kalasz, K. S., Lathrop, R. G., Matus, R. N., Minton, C. D. T., Morrison, R. I. G., Peck, M. K., Pitts, W., Robinson, R. A., and Serrano, I. L. (2008). Status of the Red Knot (Calidris canutus rufa) in the western hemisphere. Studies in Avian Biology 36, 1–185.
Piersma, T., Rogers, D. I., González, P. M., Zwarts, L., Niles, L. J., de Lima Serrano do Nascimento, I., Minton, C. D. T., and Baker, A. J. (2005). Fuel storage rates in Red Knots worldwide: facing the severest ecological constraint in tropical intertidal environments? In ‘Birds of Two Worlds’. (Eds R. Greenberg and P. P. Marra.) pp. 262–273. (Smithsonian Institution Press: Washington, DC.)
van Gils, J. A., and Piersma, T. (1999). Day- and night-time movements of radiomarked Red Knots staging in the western Wadden Sea in July–August 1995. Wader Study Group Bulletin 89, 36–44.
van Gils, J. A., Dekinga, A., Spaans, B., Vahl, W. K., and Piersma, T. (2005). Digestive bottleneck affects foraging decisions in Red Knots (Calidris canutus). II. Patch choice and length of working day. Journal of Animal Ecology 74, 120–130.
| Digestive bottleneck affects foraging decisions in Red Knots (Calidris canutus). II. Patch choice and length of working day.Crossref | GoogleScholarGoogle Scholar |
Vila, A. R., Bremer, E. R., and Beade, M. S. (1994). Censos de chorlos y playeros migratorios en la Bahía de Samborombón, Provincia de Buenos Aires, Argentina. Boletín Técnico 22, Fundación Vida Silvestre, Buenos Aires, Argentina.