Abstract
Knowledge of the real size of any wild population is an essential tool to take management and conservation measures and even more so when the population studied may have potential conflicts with humans. Because of this, the objective of this study was to estimate the population size of two South American sea lion male haul-outs using mark-resighting techniques. The results showed that on average, the estimated total number of animals tripled the number of animals recorded by direct counting. These findings demonstrate that it is necessary to continue researching population estimate methods to apply when taking conservation measures in the future.
Acknowledgments
We thank Prefectura Naval Argentina (Puerto Quequén), Consorcio de Gestión de Puerto Quequén, and the lifeguards of “Playa los Patos” for their help in the field. We also thank Professor Laura N. Kloepper and Victoria Lichtschein for reviewing the English version of this article and for her very useful comments and Dr. P. Denuncio for making the map. G. Giardino and M.A. Mandiola were granted Doctoral fellowships by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Society for Marine Mammalogy Grants in Aid of Research (2008, 2012). This study was part of G. Giardino’s PhD program at Universidad Nacional de Mar del Plata.
References
Arbiza J, A. Blanc, M. Castro-Ramos, H. Katz, A. Ponce de León and M. Clara. 2012. Uruguayan Pinnipeds (Arctocephalusaustralis and Otaria flavescens): Evidence of influenza virus and Mycobacterium pinnipedii infections. In: (A. Romero and O. E. Keith, eds.) New approaches to the study of marine mammals. InTech, Rijeka, Croatia. pp. 151–182.10.5772/54214Search in Google Scholar
Bailey, N.T.J. 1951. On estimating the size of mobile populations from recapture data. Biometrika 38: 293–306.10.1093/biomet/38.3-4.293Search in Google Scholar
Bart, J., M.A. Fligner and W.I. Notz. 1998. Sampling and statistical methods for behavioral ecologists. Cambridge University Press, Cambridge, England, UK.10.1017/CBO9780511612572Search in Google Scholar
Bartheld Villagra, J.L., H. Pavés Hernández, F. Contreras, C. Vera, C. Manque, D. Miranda, D. Sepúlveda, P. Artacho and L. Ossman. 2006. Cuantificación poblacional de lobos marinos en el litoral de la I a la IV región. Proyecto FIP N 2006-50.Search in Google Scholar
Bastida R, V. Quse and R. Guichón. 2011. La tuberculosis en grupos de cazadores recolectores de Patagonia y Tierra Del Fuego: Nuevas alternativas de contagio a través de la fauna silvestre. Rev. Argent. Antropol. Biol. 1: 83–95.Search in Google Scholar
Bernardelli A, R. Bastida, J. Loureiro, H. Michelis, M.I. Romano, A. Cataldi and E. Costa. 1996. Tuberculosis in sea lions and fur seals from the south-western Atlantic coast. Rev. Sci. Tech. Off. Int. Epiz. 15: 985–1005.10.20506/rst.15.3.963Search in Google Scholar PubMed
Beron Vera, B., E.A. Crespo, A. Raga and S.N. Pedraza. 2004. Uncinaria hamiltoni (Nematoda: Ancylostomatidae) in South American Sea Lions, Otaria flavescens, from Northern Patagonia, Argentina. J. Parasitol. 90: 860–863.10.1645/GE-182RSearch in Google Scholar PubMed
Bos, K.I., K.M. Harkins, A. Herbig, M. Coscolla, N. Weber, I. Comas, S.A. Forrest, J.M. Bryant, S.R. Harris, V.J. Schuenemann, T.J. Campbell, K. Majander, A.K. Wilbur, R.A. Guichon, D.L. Wolfe Steadman, D.C. Cook, S. Niemann, M.A. Behr, M. Zumarraga, R. Bastida, D. Huson, K. Nieselt, D. Young, J. Parkhill, J.E. Buikstra, S. Gagneux, A.C. Stone and J. Krause. 2014. Pre-Columbian mycobacterial genomes reveal seals as a source of New World human tuberculosis. Nature 514: 494–497.10.1038/nature13591Search in Google Scholar PubMed PubMed Central
Bowden, D.C. and R.C. Kufeld. 1995. Generalized mark-sight population size estimation applied to Colorado moose. J. Wildlife Manage. 59: 840–851.10.2307/3801965Search in Google Scholar
Campagna, C. 1985. The breeding cycle of the Southern sea lion, Otaria byronia, Marine Mammal. Science 1: 210–218.10.1111/j.1748-7692.1985.tb00010.xSearch in Google Scholar
Campagna, C., R. Werner, W. Karesh, M.R. Marin, F. Koontz, R. Cook and C. Koontz. 2001. Movements and location at sea of South American sea lions (Otaria flavescens). J. Zool. 257: 205–220.10.1017/S0952836901001285Search in Google Scholar
Crespo, E.A. and S.N. Pedraza. 1991. Estado actual y tendencia de la población de lobos marinos de un pelo (Otaria flavescens) en el litoral norpatagonico. Ecología. Austral. 1: 87–95.Search in Google Scholar
Crespo, E.A., S.N. Pedraza, S.L. Dans, M. Koen Alonso, L.M. Reyes, N.A. Garcia, M. Coscarella and A.C.M. Schiavini. 1997. Direct and indirect effects of the high seas fisheries on the Marine Mammal populations in northern and central Patagonian coast J. Northwest Atl. Fish. Sci. 22: 189–207.10.2960/J.v22.a15Search in Google Scholar
Curtis, P.D., B. Boldgiv, P.M. Mattison and J.R. Boulanger. 2009. Estimating deer abundance in suburban areas with infrared-triggered cameras. Human-Wildlife Conflicts 3: 116–128.Search in Google Scholar
Dans, S.L., E.A. Crespo, S.N. Pedraza, R. Gonzalez and N.A. Garcia. 1996. Estructura y tendencia de los apostaderos de lobos marinos de un pelo (Otaria flavescens) en el norte de la Patagonia. Informes Técnicos del Plan de Manejo Integrado de la Zona Costera Patagónica 13: 1–21.Search in Google Scholar
Dans, S.L., E.A. Crespo, S.N. Pedraza and M. Koen Alonso. 2004. Recovery of the South American sea lion (Otaria flavescens) population in northern Patagonia. Can. J. Fish. Aquat. Sci. 61: 1681–1690.10.1139/f04-105Search in Google Scholar
Erickson, A.W., M.N. Bester and R.M. Laws. 1993. Marking techniques. Antarctic seals. Research methods and techniques. R.M. Laws. Cambridge U.K, Cambridge University Press, pp. 89–118.10.1017/CBO9780511565281.006Search in Google Scholar
Fattorini, L., M. Marcheselli, A. Monaco and C. Pisani. 2007. A critical look at some widely used estimators in mark-resighting experiments. J. Anim. Ecol. 76: 957–965.10.1111/j.1365-2656.2007.01275.xSearch in Google Scholar PubMed
Gentry, R.L. and J.R. Holt. 1982. Equipment and techniques for handling northern fur seals. NOAA Technical Report NMFS 758: 16.Search in Google Scholar
Giardino, G.V. 2006. Patrones de ingreso y egreso y estimación del tamaño de la colonia de lobos marinos de un pelo de Puerto Quequén. Tesis de grado, Universidad Nacional de Mar del Plata.Search in Google Scholar
Giardino, G. 2014. Estructura y dinámica de las colonias de lobos marinos de un pelo de la Provincia de Buenos Aires, y su relación con pesquerías de la región. Doctoral Thesis, Universidad Nacional de Mar del Plata.Search in Google Scholar
Giardino, G., A. Mandiola, J. Bastida, R. Bastida and D. Rodríguez. 2013. Técnica de marcado por decoloración de pelo en el lobo marino Otaria flavescens: descripción y evaluación del método. Mastozool. Neotrop. 20: 393–398.Search in Google Scholar
Giardino, G.V., M.A. Mandiola, J. Bastida, P.E. Denuncio, R.O. Bastida and D.H. Rodríguez. 2016. Travel for sex: long range breeding dispersal and winter haulout fidelity in Southern sea lion males. Mamm Biol. 81: 89–95.10.1016/j.mambio.2014.12.003Search in Google Scholar
Godoy, J.C. 1963. Caza de Pinnípedos (Lobos Marinos; elefantes marinos y otras focas). Serie Evaluación de los Recursos Naturales de la Argentina. Buenos Aires, Argentina. Consejo Federal de Inversiones. VIII: 133–152.Search in Google Scholar
Grandi, M.F., S.L. Dans and E.A. Crespo. 2008. Social composition and spatial distribution of colonies in an expanding population of South American sea lions. J. Mammal. 89: 1218–1228.10.1644/08-MAMM-A-088.1Search in Google Scholar
Grandi, M. F., d.L.R. Oliveira, S.L. Dans and E.A. Crespo. 2012. A hunted population in recovery: effective population size for South American sea lions from Patagonia. Anim. Biol. 62: 433–450.10.1163/157075612X642941Search in Google Scholar
Hückstädt, L.A. and C.M. Kraus. 2004. Interaction between southern sea lions Otaria flavescens and jack mackerel Trachurus symmetricus commercial fishery off Central Chile: a geostatistical approach. Mar. Ecol-Prog. Ser. 282: 285–294.10.3354/meps282285Search in Google Scholar
Kiers, A., A. Klarenbeek, B. Mendelts, D. Van Soolingen and G. Koëter. 2008. Transmission of Mycobacterium pinnipedii to humans in a zoo with marine mammals. Int. J. Tuberc. Lung Dis. 12: 1469–1473.Search in Google Scholar
Langdon, C.A. 2001. A comparision of white-tailed deer population estimation methods in west Virginia Thesis, West Virginian Univercity. Morgantown, West Virginia.Search in Google Scholar
McClintock, B.T. and G.C. White. 2009. A less field-intensive robust design for estimating demographic parameters with mark: resight data. Ecology 90: 313–320.10.1890/08-0973.1Search in Google Scholar PubMed
Minta, S. and M. Mangel. 1989. A simple population estimate based on simulation for capture recapture and capture-resight data. Ecology 70: 1738–1751.10.2307/1938108Search in Google Scholar
Morley, R.C. and R.J. Van Aarde. 2007. Estimating abundance for a savanna elephant population using mark–resight methods: a case study for the Tembe Elephant Park, South Africa. J. Zool. 271: 418–427.10.1111/j.1469-7998.2006.00225.xSearch in Google Scholar
Nichols, J.D. 1992. Capture-recapture models. BioScience 42: 94–102.10.2307/1311650Search in Google Scholar
Nunney, L. and D.R. Elam. 1994. Estimating the effective population size of conserved populations. Conserv. Biol. 8: 175–184.10.1046/j.1523-1739.1994.08010175.xSearch in Google Scholar
Osman, L. and H. Pavés. 2006. Conflictos entre animales domésticos, el lobo fino de Juan Fernández (Arctocephalus philippii) y el lobo marino común (Otaria flavescens). Memorias del Taller de Trabajo sobre el Impacto de las Actividades Antropogénicas en Mamíferos Marinos en el Pacífico Sudeste, Bogotá, Colombia.Search in Google Scholar
Pavanato Julião, H. 2010. Dinâmica de ocupação do leão-marinho-do-sul nos refúgios do Rio Grande do Sul. Thesis, Universidade Federal do Rio Grande.Search in Google Scholar
Petracci, P.F., M. Sotelo, V. Massola, M. Carrizo, A. Scorolli, S. Zalba and V. Delhey. 2010. Actualización sobre el estado del apostadero de lobo marino de un pelo sudamericano (Otaria flavescens) en la isla Trinidad, estuario de Bahía Blanca, Argentina. Mastozoología Neotropical 17: 175–182.Search in Google Scholar
Ponce de León, A. and O. Pin. 2006. Distribución, reproducción y alimentación del lobo fino Arctocephalus australis y del león marino Otaria flavescens en Uruguay, In: (Bases para la conservación y el manejo de la costa uruguaya. R. Menafra, L. Rodríguez-gallego, F. Scarabino and D. Conde, eds.) VIDA SILVESTRE URUGUAY, Montevideo. pp. 305–313.Search in Google Scholar
Riet-Sapriza, F.G., D.P. Costa, V. Franco-Trecu, Y. Marín, J. Chocca, B. González, G. Beathyate, B. Louise Chilvers and L.A. Hückstadt. 2013. Foraging behavior of lactating South American sea lions (Otaria flavescens) and spatial–temporal resource overlap with the Uruguayan fisheries. Deep-Sea Res. 88–89(Pt II): 106–119.10.1016/j.dsr2.2012.09.005Search in Google Scholar
Rodríguez, D.H. 1996. Biología y Ecología de los Pinnípedos del Sector Bonaerense. Doctoral Thesis, Universidad Nacional de Mar del Plata, Mar del Plata.Search in Google Scholar
Rodríguez, D.H., M. Dassis, A. Ponce de León, C. Barreiro, M. Farenga, R. O. Bastida and R. W. Davis. 2013. Foraging strategies of Southern sea lion females in the La Plata River Estuary (Argentina–Uruguay). Deep-Sea Res. 88–89(Pt II): 120–130.10.1016/j.dsr2.2012.07.012Search in Google Scholar
Schenkel, E. and F. Almeida García. 2015. La política turística y la intervención del Estado: El caso de Argentina. Perfiles Latinoamericanos 23: 197–221.10.18504/pl2346-197-2015Search in Google Scholar
Schwarz, C.J. and G.A.F. Seber. 1999. Estimating animal abundance: review III. Stat. Sci. 14: 427–456.10.1214/ss/1009212521Search in Google Scholar
Sepúlveda, M. and D. Oliva. 2005. Interactions between South American sea lions Otaria flavescens (Shaw) and salmon farms in southern Chile. Aquac. Res. 36: 1062–1068.10.1111/j.1365-2109.2005.01320.xSearch in Google Scholar
Sepúlveda, M., M.J. Pérez, W. Sieldfeld, D. Oliva, L.R. Durán, L. Rodríguez, V. Araos and M. Buscaglia. 2007. Operational interaction between South American sea lions Otaria flavescens and artisanal (small-scale) fishing in Chile: Results from interview surveys and on-board observations. Fish Res. 83: 332–340.10.1016/j.fishres.2006.10.009Search in Google Scholar
Shawn Smallwood, K. and C. Schonewald. 1998. Study design and interpretation of mammalian carnivore density estimates. Oecologia 113: 474–491.10.1007/s004420050400Search in Google Scholar PubMed
Solberg, K.H., E. Bellemain, O.-M. Drageset, P. Taberlet and J.E. Swenson. 2006. An evaluation of field and non-invasive genetic methods to estimate brown bear (Ursus arctos) population size. Biol. Conserv. 128: 158–168.10.1016/j.biocon.2005.09.025Search in Google Scholar
Szteren, D. 2007. Predation of Otaria flavescens over artisanal fisheries in uruguay: opportunism or prey selectivity?, LAJAM 5: 28–39.10.5597/lajam00089Search in Google Scholar
Szteren, D. and C. Lezama. 2006. Interacciones entre lobos marinos y pesca artesanal en la costa de Uruguay. Bases para la conservación y el manejo de la costa uruguaya. In: (R. Menafra, L. Rodríguez-Gallego, F. Scarabino and D. Conde, eds.) Vida Silvestre Uruguay, Montevideo. pp. 321–328.Search in Google Scholar
Thompson, P.M., A. Mackay, D.J. Tollit, S. Enderby and P.S. Hammond. 1998. The influence of body size and sex on the characteristics of harbour seal foraging trips. Can. J. Zool. 76: 1044–1053.10.1139/z98-035Search in Google Scholar
Timi, J.T., M. Paoletti, R. Cimmaruta, A.L. Lanfranchi, A.J. Alarcos, L. Garbin, M. George-Nascimento, D.H. Rodríguez, G.V. Giardino and S. Mattiucci. 2014. Molecular identification, morphological characterization and new insights into the ecology of larval Pseudoterranova cattani in fishes from the Argentine coast with its differentiation from the Antarctic species, P. decipiens sp. E (Nematoda: Anisakidae). Vet. Parasitol. 199: 59–72.10.1016/j.vetpar.2013.09.033Search in Google Scholar PubMed
Werner, R. and C. Campagna. 1995. Diving behavior of lactating southern sea lions (Otaria flavescens) in Patagonia. Can. J. Zool. 73: 1975–1982.10.1139/z95-232Search in Google Scholar
Westergaard, G., D.H. Rodríguez, L. Rivero and R.O. Bastida. 1999. Dinámica y estructura de edades del apostadero de lobos marinos de un pelo (Otaria flavescens) de Puerto Quequén, Argentina. Resúmenes Expandidos del VIII Congreso Latinoamericano de Ciencias del Mar, pp. 265–266.Search in Google Scholar
White, G.C. 1994. Program NOREMARK software reference manual. C. S. University. Fort Collins, Colorado, USA.Search in Google Scholar
White, G.C. 1996. NOREMARK: population estimation from mark-resighting surveys. Wildl. Soc. Bull. 24: 50–52.Search in Google Scholar
White, G.C., D.R. Anderson, K.P. Burnham and D.L. Otis. 1982. Capture-recapture and removal methods for sampling closed populations. Los Alamos, New Mexico, USA, LA-8787-NERP.Search in Google Scholar
©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Studies
- Phylogeny explains better than ecology or body size the variation of the first lower molar in didelphid marsupials
- Morphology and mitochondrial gene divergence in Hipposideros armiger armiger occurs only in China
- Subspecies differentiation of the house mouse Mus musculus Linnaeus, 1758 in the center and east of the Iranian plateau and Afghanistan
- Biogeography and conservation of non-volant mammals from the Urucum Mountains: a Chiquitano dry forest ecoregion in western Brazil
- Update of the distribution and status of the aoudad Ammotragus lervia (Bovidae, Caprini) in Tunisia
- Geographical variation in the body size of adult female sperm whales (Physeter macrocephalus) – an example of McNab’s resource rule?
- Short Notes
- Estimated population size of two South American sea lion male haulouts from the northern coast of Argentina
- A first view of the unseen: nests of an endangered Atlantic Forest rat species
- Predation upon small mammals by Caluromys lanatus (Didelphimorphia: Didelphidae) and Callithrix penicillata (Primates: Callitrichidae) in the Brazilian savanna
- Forest surveys extend the range of the Krau woolly bat (Kerivoula krauensis) in the Malay-Thai Peninsula, Borneo and Sumatra
- A reflection on recent trends in wildlife protection in Italy stemming from the question of the Montecristo wild goat
- Eastern fox squirrel (Sciurus niger, Linnaeus 1758) introduction to the Sonoran Desert
Articles in the same Issue
- Frontmatter
- Original Studies
- Phylogeny explains better than ecology or body size the variation of the first lower molar in didelphid marsupials
- Morphology and mitochondrial gene divergence in Hipposideros armiger armiger occurs only in China
- Subspecies differentiation of the house mouse Mus musculus Linnaeus, 1758 in the center and east of the Iranian plateau and Afghanistan
- Biogeography and conservation of non-volant mammals from the Urucum Mountains: a Chiquitano dry forest ecoregion in western Brazil
- Update of the distribution and status of the aoudad Ammotragus lervia (Bovidae, Caprini) in Tunisia
- Geographical variation in the body size of adult female sperm whales (Physeter macrocephalus) – an example of McNab’s resource rule?
- Short Notes
- Estimated population size of two South American sea lion male haulouts from the northern coast of Argentina
- A first view of the unseen: nests of an endangered Atlantic Forest rat species
- Predation upon small mammals by Caluromys lanatus (Didelphimorphia: Didelphidae) and Callithrix penicillata (Primates: Callitrichidae) in the Brazilian savanna
- Forest surveys extend the range of the Krau woolly bat (Kerivoula krauensis) in the Malay-Thai Peninsula, Borneo and Sumatra
- A reflection on recent trends in wildlife protection in Italy stemming from the question of the Montecristo wild goat
- Eastern fox squirrel (Sciurus niger, Linnaeus 1758) introduction to the Sonoran Desert