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New data on South American fur seals and sea lions' occupation of the Wildlife Refuge of Ilha dos Lobos, southern Brazil

Published online by Cambridge University Press:  28 July 2023

Natália Procksch ,
Paulo Henrique Ott ,
Natalia Bragiola Berchieri ,
Daniel Danilewicz ,
Rafael Kenji Horota ,
Murilo Guimarães ,
Marcelo Zagonel ,
Maurício Roberto Veronez  and
Larissa Rosa de Oliveira Open the ORCID record for Larissa Rosa de Oliveira [Opens in a new window]
Natália Procksch
Affiliation:
Laboratório de Ecologia de Mamíferos (LEM), Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, São Leopoldo, RS 93022-750, Brazil
Paulo Henrique Ott
Affiliation:
Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). Rua Bento Gonçalves, Saldanha da Gama, 937, Torres, RS 95560-000, Brazil Universidade Estadual do Rio Grande do Sul (UERGS). Laboratório de Biodiversidade e Conservação (LABeC). Rua Machado de Assis, 1456, Osório, RS 95520-000, Brazil
Natalia Bragiola Berchieri
Affiliation:
Universidade Federal do Piauí, Departamento de Biologia, Avenida Universitária, lado ímpar, Teresina, PI 64049-550, Brazil
Daniel Danilewicz
Affiliation:
Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). Rua Bento Gonçalves, Saldanha da Gama, 937, Torres, RS 95560-000, Brazil Instituto Aqualie. Avenida Doutor Paulo Japiassú Coelho, 714, salas 201 e 202, Juiz de Fora, MG 36033-310, Brazil
Rafael Kenji Horota
Affiliation:
Advanced Visualization & Geoinformatics Laboratory (VizLab), Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, São Leopoldo, RS 93022-750, Brazil Svalbard (UNIS), University Centre in Svalbard (UNIS), Longyearbyen 9170, Svalbard, Norway University of Bergen (UiB), 5007 Bergen, Norway
Murilo Guimarães
Affiliation:
Universidade Federal do Piauí, Departamento de Biologia, Avenida Universitária, lado ímpar, Teresina, PI 64049-550, Brazil
Marcelo Zagonel
Affiliation:
Advanced Visualization & Geoinformatics Laboratory (VizLab), Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, São Leopoldo, RS 93022-750, Brazil
Maurício Roberto Veronez
Affiliation:
Advanced Visualization & Geoinformatics Laboratory (VizLab), Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, São Leopoldo, RS 93022-750, Brazil
Larissa Rosa de Oliveira*
Affiliation:
Laboratório de Ecologia de Mamíferos (LEM), Universidade do Vale do Rio dos Sinos (UNISINOS), Av. Unisinos 950, Cristo Rei, São Leopoldo, RS 93022-750, Brazil Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). Rua Bento Gonçalves, Saldanha da Gama, 937, Torres, RS 95560-000, Brazil
*
Corresponding author: Larissa Rosa Oliveira; Email: larissaro@unisinos.br
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Abstract

We present the most recent data on the seasonal and spatial occupation of South American sea lions (Otaria flavescens) and fur seals (Arctocephalus australis) in the Wildlife Refuge of Ilha dos Lobos (WRIL) in southern Brazil throughout the year, based on aerial photographic counts. Thirty-one aerial photographic counts were conducted between July 2019 and November 2020 to assess monthly differences in the abundance of pinnipeds in the WRIL. The results were analysed using a generalized linear model. Spatial analysis was performed using kernel density. Subadult males of South American sea lion were the most abundant pinniped in the WRIL, followed by juveniles of South American fur seal. A juvenile of Southern elephant seal (Mirounga leonina) was also recorded. South American fur seals showed a marked seasonality, occurring only between July and October, while South American sea lions occurred year-round. Among the months analysed, September exhibited the highest mean abundance (mean 113.75; SD: ± 8.58), followed by August (mean 103.00; SD: ± 15.69). The pinnipeds were more often concentrated in the northern and central parts of the island. This study reinforces the importance of the WRIL as a haulout site for pinnipeds. Considering the seasonal occupation of the island by South American pinnipeds, monitoring is recommended prior to the development of activities in the area.

Keywords

Aerial countsArctocephalus australisKernel densityOtaria flavescens
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 103 , 2023 , e58
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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References

Aires, AS (2020) Evaluation of digital outcrop model generation from SFM digital photogrammetry using multiple spherical panoramic images. Trabalho de Conclusão de Curso (Bacharelado em Engenharia Cartográfica e de Agrimensura). Universidade do Vale do Rio dos Sinos, São Leopoldo, BRA.Google Scholar
Bastida, R and Rodríguez, D (1994) Hallazgo de un apostadero estacional de lobos marinos de dos pelos, Arctocephalus australis (Zimmermann, 1783), en bajos fondos frente a la costa de Mar del Plata (Provincia de Buenos Aires, Argentina). Anales 4ª Reunión de Trabajo de Especialistas en Mamíferos Acuáticos de América del Sur, 1–22.Google Scholar
Bates, D, Maechler, M, Bolker, B and Walker, S (2015) Fitting linear mixed-effects models using lme4. Journal of Statistical Software 67, 1–48.CrossRefGoogle Scholar
Bombau, A and Szteren, D (2017) Seasonal variability of South American Fur Seals (Arctocephalus australis) and sea lions (Otaria flavescens) in two haul-outs and interactions with small-scale fisheries off the coast of Montevideo, Uruguay. Aquatic Mammals 43, 479–491.CrossRefGoogle Scholar
Brasil, (1983) Decreto no. 88.463, de 4 de julho de 1983. Cria a Reserva Ecológica Ilha dos Lobos, e dá outras providencias. Diário Oficial da República Federativa do Brasil 129, 12009.Google Scholar
Brasil, (2005) Decreto de 4 de julho de 2005. Presidência da República-Casa Civil- Subchefia para Assuntos Jurídicos. 04 de julho de 2005. Brasília, BRA. Available at https://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2005/Dnn/Dnn10578.htm (Accessed online 18 July 2023).Google Scholar
Campagna, C (1985) The breeding cycle of the southern sea lion, Otaria byronia. Marine Mammal Science 1, 210–218.CrossRefGoogle Scholar
Chandler, J and Buckeley, S (2016) Structure from motion (SFM) photogrammetry vs terrestrial laser scanning. In Carpenter, MB and Keane, CM (eds), Geoscience Handbook. Alexandria, VA: AGI Data Sheets, Section 20.1. Available at https://hdl.handle.net/2134/21673 (Accessed online 10 July 2023)Google Scholar
Crespo, EA (1988) Dinámica poblacional del lobo marino de un pelo Otaria flavescens (Shaw, 1800), en el norte del Litoral Patagónico (PhD Thesis). Universidad Nacional de Buenos Aires, Buenos Aires, ARG.Google Scholar
Danilewicz, D, Moreno, I, Tavares, M and Sucunza, F (2017) Southern right whales (Eubalaena australis) off Torres, Brazil: group characteristics, movements, and insights into the role of the Brazilian-Uruguayan wintering ground. Mammalia 81, 225–234.CrossRefGoogle Scholar
Engel, MT, Marchini, S, Pont, AC, Machado, R and Oliveira, LR (2014) Perceptions and attitudes of stakeholders towards the Wildlife Refuge of Ilha dos Lobos, a marine protected area in Brazil. Marine Policy 45, 45–51.CrossRefGoogle Scholar
Franco-Trecu, V, Costa, P, Scharam, Y, Tassino, B and Inchausti, P (2014) Sex on the rocks: reproductive tactics and breeding success of South American fur seal males. Behavioral ecology 25, 1513–1523.CrossRefGoogle Scholar
Franco-Trecu, V, Drago, M, Grandi, MF, Soutullo, A, Crespo, EA and Inchausti, P (2019) Abundance and population trends of the South American Fur Seal (Arctocephalus australis) in Uruguay. Aquatic Mammals 45, 48–55.CrossRefGoogle Scholar
Grandi, MF, Dans, SL, García, NA and Crespo, EA (2010) Growth and age at sexual maturity of South American sea lions. Mammalian Biology 75, 427–436.CrossRefGoogle Scholar
Groch, KR, Palazzo, JT, Flores, PAC, Adler, FR and Fabian, ME (2005) Recent rapid increases in the right whale (Eubalaena australis) population off southern Brazil. Latin American Journal of Aquatic Mammals 4, 41–47.CrossRefGoogle Scholar
King, JE (1983) Seals of the World. British Museum of Natural History. Ithaca, New York: Cornell University Press.Google Scholar
Lewis, M (1996) Elefante marino del sur: biología de la especie, descripción general de la agrupación de la Península Valdés y protocolos de trabajo. Informes Técnicos del Plan de Manejo Integrado de la Zona Costera Patagónica 16, 1–29.Google Scholar
Moura, J, Di Dario, B, Lima, L and Siciliano, S (2010) Southern elephant seals (Mirounga leonina) along the Brazilian coast: review and additional records. Marine Biodiversity Records 3, 1–5.CrossRefGoogle Scholar
Oliveira, LR (1999) Caracterização dos padrões de ocorrência dos pinípedes (Carnivora: Pinnipedia) ocorrentes no litoral do Rio Grande do Sul, Brasil, entre 1993 e 1999 (Master Dissertation). Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, BRA.Google Scholar
Oliveira, LR (2013) Carnívoros marinhos. In Weber, MM, Roman, C and Cáceres, NC (eds), Mamíferos do Rio Grande do Sul. Santa Maria: Editora UFSM. 405–227.Google Scholar
Oliveira, LR, Danilewicz, D, Martins, MB, Ott, PH, Moreno, IB and Caon, G (2001) New records of the Antarctic fur seal, Arctocephalus gazella (Peters, 1875) to the Brazilian coast. Com. Museu de Ciência e Tecnologia da PUCRS 14, 201–207.Google Scholar
Oliveira, LR, Gehara, MCM, Fraga, LD, Lopes, F, Túnez, JI, Cassini, MH, Majluf, P, Cárdenas-Alayza, S, Pavés, HJ, Crespo, EA, García, N, Castro, RL, Hoelzel, AR, Sepúlveda, M, Olavarría, C, Valiati, VH, Quiñones, R, Pérez-Alvarez, MJ, Ott, PH and Bonatto, SL (2017) Ancient female philopatry, asymmetric male gene flow, and synchronous population expansion support the influence of climatic oscillations on the evolution of South American sea lion (Otaria flavescens). PloS one 12, e0179442.CrossRefGoogle ScholarPubMed
Oliveira, LR, Pont, AC, Machado, R, Engel, MT, Ott, PH, Crespo, EA and Marchini, S (2020) Assessing the economic impact caused by South American sea lions based on onboard check versus fishermen's perception: the two sides of the same coin. Marine Policy 121, 104193.CrossRefGoogle Scholar
Oliveira, LR, Machado, R, Alievi, MM and Würdig, NL (2006) Crabeater seal (Lobodon carcinophaga) on the coast of Rio Grande do Sul State, Brazil. Latin American Journal of Aquatic Mammals 5, 145–148.CrossRefGoogle Scholar
Ott, PH, Brandão, MV, Sucunza, F and Oliveira, LR (2022) O Turismo Embarcado no Refúgio de Vida Silvestre da Ilha dos Lobos, Sul do Brasil: Estado Atual e Perspectivas Futuras. Gestão do Uso Público: Turismo e Lazer em Áreas Protegidas 12, 1–24.Google Scholar
Pavanato, H, Silva, KG, Estima, SC, Monteiro, DS and Kinas, PG (2013) Occupancy dynamics of South American Sea-Lions in Brazilian Haul-outs. Brazilian Journal of Biology 73, 855–862.CrossRefGoogle ScholarPubMed
Pinedo, MC (1990) Ocorrência de pinípedes na costa brasileira. Garcia de Orta – Serie de Zoologia 15, 37–48.Google Scholar
Pont, AC, Marchini, S, Engel, MT, Machado, R, Ott, PH, Crespo, EA, Coscarella, M, Dalzochio, MS and Oliveira, LR (2016) The human dimension of the conflict between fishermen and South American sea lions in southern Brazil. Hydrobiologia 767, 1–16.Google Scholar
Procksch, N, Grandi, MF, Ott, PH, Groch, K, Flores, PAC, Zagonel, M, Crespo, EA, Machado, R, Pavez, G, Guimarães, M, Veronez, M and Oliveira, LR (2020) The northernmost haulout site of South American sea lions and fur seals in the western South Atlantic. Scientific Reports 10, 20008.CrossRefGoogle ScholarPubMed
Procksch, N, Berchieri, NB, Horota, RK, Sales, V, Ott, PH, Danilewicz, D, Guimarães, TT, Guimarães, M, Veronez, MR and Oliveira, LR (2023) Habitat use by South American fur seals (Arctocephalus australis) and sea lions (Otaria flavescens) in a marine protected area in southern Brazil. Marine Policy 155, 105693.CrossRefGoogle Scholar
R Core Team (2019) R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing. Auckland, NZ. Available at https://www.R-project.org/ (Accessed online 04 July 2022).Google Scholar
Rosas, FCW, Pinedo, MC, Marmotel, M and Haimovici, M (1994) Seasonal movements of the South American sea lion (Otaria flavescens Shaw, 1800) of the Rio Grande do Sul coast, Brazil. Mammalia 58, 51–59.CrossRefGoogle Scholar
Sanfelice, D, Vasques, VC and Crespo, EA (1999) Ocupação sazonal por duas espécies de Otariidae (Mammalia, Carnivora) da Reserva Ecológica Ilha dos Lobos, Rio Grande do Sul, Brasil. Iheringia Serie de Zoologia 87, 101–110.Google Scholar
Schossler, V, Simões, JC, Aquino, FE and Viana, DR (2018). Precipitation anomalies in the Brazilian southern coast related to the SAM and ENSO climate variability mode. Brazilian Journal of Water Resources 23, e14.Google Scholar
Silva-Jr, JM, Miranda, AV, Attademo, LFN, Zanoni, SA and Luna, FO (2019) Manual de boas práticas em interação com mamíferos marinhos, 1st edn. Brasília: ICMBio/CMA.Google Scholar
Silva, KG (2004) Os pinípedes no Brasil: ocorrências, estimativas populacionais e conservação (PhD thesis). Fundação Universidade Federal de Rio Grande, Rio Grande, BRA.Google Scholar
Silva, KG, Araújo, TG, Crivellaro, CVL and Menezes, RB (2014) Os Mamíferos Marinhos do Litoral do Rio Grande do Sul, 1st Edn. Rio Grande: NEMA.Google Scholar
Silverman, BW (1986) Density Estimation for Statistics and Data Analysis, 1st edn. London: Chapman & Hall.Google Scholar
Simões-Lopes, PC, Drehmer, CJ and Ott, PH (1995) Nota sobre os Otariidae e Phocidae (Mammalia: Carnivora) da costa norte do Rio Grande do Sul e Santa Catarina, Brasil. Biociências 3, 173–181.Google Scholar
VanWormer, E, Mazet, JAK, Hall, A, Gill, VA, Boveng, BL, London, JM, Gellat, T, Fadely, BL, Lander, ME, Sterling, J, Burkanov, VN, Ream, RR, Brock, PM, Rea, LD, Smith, BR, Jeffers, A, Henstock, M, Rehberg, MJ, Burek-Huntington, KA, Cosby, SL, Hammond, JA, Goldstein, T (2019) Viral emergence in marine mammals in the North Pacific may be linked to Arctic sea ice reduction. Scientific Reports 9, 15569.CrossRefGoogle ScholarPubMed
Vaz-Ferreira, R (1982a) Arctocephalus australis (Zimmermann): South American fur seal. Mammals in the Seas, FAO Fisheries Series 4, 497–508.Google Scholar
Vaz-Ferreira, R (1982b) Otaria flavescens (Shaw): South American sea lion. Mammals in the Seas. FAO Fisheries Series 4, 477–495.Google Scholar