Estudios comparativos de los etogramas de Otaria flavescens, Arctocephalus australis y otros Otaríidos (Mammalia)

Vaz-Ferreira, Raúl; Vallejo, Silvana; Huertas, M.D

doi:10.1590/s0101-81751983000300009

Cited by 4 publications

(2 citation statements)

References 3 publications

(1 reference statement)

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“…However, the decline in this population remains a mystery for population geneticists. Nevertheless, it has been attributed to long-term commercial sealing (Vaz-Ferreira et al ., 1984), fishery interactions (De María et al ., 2014), disruption of the social structure (Franco-Trecu et al ., 2015), or unknown reasons (Páez, 2006).…”

Section: Introductionmentioning

confidence: 99%

Low genetic variability and high isolation of a post-harvest South American pinniped population as revealed by genome-wide SNPs

Peralta,

Ibañez,

Lucero

et al. 2023

Preprint

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Otaria flavescenshas been one of the most heavily exploited pinnipeds during the last 200 years with depletions of about 90% in some colonies. After the prohibition on sealing in South America, populations became stabilized except for the Uruguayan population, which showed a constant decrease. The underlying causes of its decline have remained unknown. This study used the RAD-seq approach to assess the variability and connectivity of some of the most overexploited sea lion colonies in the Atlantic Ocean. Our results revealed low allelic richness, nucleotide diversity and heterozygosity in the Uruguayan population and evidence of complete isolation from the Argentinean populations under study. In contrast, the Patagonian populations showed a high degree of connectivity, which could explain their recovery and high levels of current diversity. Our research emphasizes the precarious genetic status of the Uruguayan sea lion population, calling for the immediate implementation of conservation measures.

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Section: Introductionmentioning

confidence: 99%

Low genetic variability and high isolation of a post-harvest South American pinniped population as revealed by genome-wide SNPs

Peralta,

Ibañez,

Lucero

et al. 2023

Preprint

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“…These are gregarious sea mammals that spend time in the sea but also on the shore, particularly in the reproductive season. During that time, pinnipeds can become very aggressive (Cappozzo 1995;Pérez-Álvarez et al 2013;Vaz-Ferreira et al 1984). Since hunter-gatherers did not develop boat technology in this area, hunting must have taken place on the land with particular hunting strategies, as it has been proposed by Cañete Mastrángelo (2019).…”

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confidence: 99%

Hunting on the coast: An image gallery of Rompecráneos

Mastrángelo

2021

JLS

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The Rompecráneo is a special kind of lithic artifact which was, presumably, involved in the capture of pinnipeds carried out along the Patagonian coast of Argentina during prehistoric times. Recent papers had offered some information about their morphology but up to now they are poorly studied. In order to offset this situation in a previous work we addressed their role in hunting technics developed at the archaeological locality of Punta Entrada (Santa Cruz, Argentina). This allowed us to propose that rompecráneos were used in combination with spears when hunting on the coast. With the aim of expanding this information, here we present an image gallery of some rompecráneos recovered there. Two of these pieces share a similar morphology but were made of different lithic raw materials. The other one has the appearance of a bola stone but its weight is higher than other bola stones in Patagonia. That is why it is considered a different kind of artifact. The importance of studying these kinds of artifacts is that they have the potential of providing information about the way people interacted with the different resources (biotic and abiotic) in the past so that a better understanding of human behavior can be developed. Gallery Figure 1. Geographic location of Punta Entrada. Figure 2. Rompecráneo made of andesite. The base can be seen in the lower part of the image. Weight: 593 g. Figure 3. Different view of the rompecráneo shown in Figure 2 Figure 4. Rompecráneo made of coquina. The base can be seen in the lower part of the image. Weight: 421 g. Figure 5. Different view of the rompecráneo shown in Figure 3. Figure 6. Bola stone made of andesite. Weight:1.476 kg. Figure 7. Detail of the groove of the bola stone shown in Figure 6 Figure 8. Context of recovery of bola stone presented in Figure 6.

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