Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

Vianna, Thaís dos S.; Loch, Carolina; Castilho, Pedro Volkmer de; Gaidzinski, Morgana Cirimbelli; Cremer, Marta Jussara; Simões‐Lopes, Paulo C.

doi:10.1590/s1984-4689zool-20160089

Cited by 9 publications

(13 citation statements)

References 17 publications

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“…Strandings were diffusely distributed along the Espírito Santo coast, without well-defined hotspots. The number of strandings of this species in this study was relatively high compared to similar surveys conducted in other portions of the Brazilian coastline ( Prado et al 2016 , Vianna et al 2016 , Costa et al 2017 ), which is consistent with at-sea surveys showing that melon-headed whales are occasionally seen along the coast of Espírito Santo ( Wedekin et al 2009 , 2014 ). It is worth noting that there was one instance where a live individual stranded in the state, but it later died and its death was attributed to plastic ingestion ( Costa et al 2012 ), illustrating the impacts of plastic pollution can have on this species.…”

Section: Discussionsupporting

confidence: 90%

“…At-sea observations suggest that sperm whales tend to concentrate along the central coast of Bahia, especially at the Camamu-Almada Basin, and occur at much lower densities in Espírito Santo (Batista et al 2012). The number of strandings of this species in this study was relatively high compared to similar surveys conducted in other portions of the Brazilian coastline (Prado et al 2016, Vianna et al 2016, Costa et al 2017, which suggests this species probably forages along the Vitória-Trindade ridge and occasionally approaches the Espírito Santo coast. It is worth noting that previous studies suggested that the species might be most abundant in Espírito Santo waters in winter and spring, from July to November (Batista et al 2012), but this was not evident in the strandings recorded in this study.…”

Section: Sperm Whale Physeter Macrocephalus Linnaeus 1758supporting

confidence: 39%

“…Lastly, it is worth highlighting that strandings of sperm whales and melon-headed whales occurred with an unexpectedly high frequency in comparison to other similar surveys conducted in portions of the Brazilian coastline (Meirelles et al 2009, Prado et al 2016, Vianna et al 2016, Costa et al 2017, which suggests that these deep-oceanic species might aggregate off the southern coast of Espírito Santo. Additional studies employing aerial and boat transects, telemetry and acoustic surveys are therefore warranted to investigate this hypothesis and determine important areas for cetaceans in the region.…”

Section: Implications For Conservationmentioning

confidence: 77%

“…Although the species' distribution extends as far north as 5°46'S on the Pacific coast (northern Peru), its distribution on the Atlantic coast is generally considered to be restricted south of 27°55'S (Santa Catarina state, Brazil) (International Union for Conservation of Nature and Natural Resources 2019). This species is rare in southern Brazil, with only one record in Santa Catarina and six records in Rio Grande do Sul despite over 30 years of systematic beach surveys (Prado et al 2016, Vianna et al 2016. Therefore, the Burmeister's porpoise recorded in Espírito Santo, more than 1,120 km from the species' northern Atlantic distribution limit, clearly represents an extra-limital record.…”

Section: Other Speciesmentioning

confidence: 96%

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Strandings of cetaceans on the Espírito Santo coast, southeast Brazil, 1975–2015

Mayorga¹,

Vanstreels²,

Bhering³

et al. 2020

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Espírito Santo state is located on the eastern margin of Brazil, in a transitional tropical-subtropical area (18°S–21°S) dominated by oligotrophic waters. With the exception of humpback whales (Megaptera novaeangliae), the cetacean community of Espírito Santo has been understudied. In addition to the chronic impacts from fisheries, marine pollution, urban development, and coastal habitat degradation, in November 2015 the cetacean communities of Espírito Santo were challenged by the greatest environmental disaster in Brazil’s history. The Mariana dam disaster caused 60 million cubic meters of mining waste to be washed into the Doce River, which ultimately flowed to the coastal waters of Espírito Santo, with a high concentration of heavy metals. This study reviews and updates information on cetacean strandings in the state of Espírito Santo (excluding humpback whales) prior to this disaster. From 1975 to September 2015, there were 461 recorded cetacean strandings, representing 20 species. An average 1.18 strandings per 100 km per month were recorded since a state-wide daily beach survey program was implemented in October 2010, contrasting with the 0.14 strandings per 100 km per month in previous years. Six species comprised the majority (94.7%) of stranding events: Guiana dolphin (Sotalia guianensis), Franciscana (Pontoporia blainvillei), rough-toothed dolphin (Steno bredanensis), bottlenose dolphin (Tursiops truncatus), sperm whale (Physeter macrocephalus), and melon-headed whale (Peponocephala electra). Oceanic cetaceans stranded most frequently on the southern portion of Espírito Santo, where the continental platform is narrower, whereas the strandings of coastal cetaceans such as Guiana dolphins and Franciscanas were concentrated near estuaries, especially the Doce River. This is particularly concerning in face of the Mariana dam disaster, which drastically altered the estuarine and coastal environment associated with the Doce River.

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Section: Discussionsupporting

confidence: 90%

Section: Sperm Whale Physeter Macrocephalus Linnaeus 1758supporting

confidence: 39%

Section: Implications For Conservationmentioning

confidence: 77%

Section: Other Speciesmentioning

confidence: 96%

See 2 more Smart Citations

Strandings of cetaceans on the Espírito Santo coast, southeast Brazil, 1975–2015

Mayorga¹,

Vanstreels²,

Bhering³

et al. 2020

View full text Add to dashboard Cite

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“…Strandings of marine animals occur all over the world. Although not exist global statistics on such events (ARAGONES et al, 2010), several countries (like the United States, Canada, Brazil, Peru, United Kingdom, Italy, Ireland, Australia, the Philippines, among others) have established formal monitoring programs (SWINGLE et al, 2013;VIANNA et al, 2016). In 1972 was established in the United States a National Register Network of stranding of marine animals, composed of six regional centers, whose data is stored in a central database (ARAGONES et al, 2010;Swingle et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Stranding of Marine Mammals in the Period From 2003 to 2016, in the South Ern Coast of Santa Catarina, Brazil

Freitas

Cancillier

Sá

et al. 2021

Int J Innov Educ Res

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Stranding is the event in which a marine animal comes ashore after death or comes and is unable to return to the sea, which may occur due to natural, spatial tendencies and anthropic actions. It occurs in many countries, several of which have created formal programs to monitor. Mammals are at the top of the food chain, suffering more from changes in the environment, which is why they indicate the quality of the ecosystem. In the southern region of Brazil, inventories of marine mammal biodiversity emerged in the 1980s. Registering stranded data makes it possible to discover important information about marine animals and the oceans. This work aimed to collect information to identify the composition and abundance of strandings of marine mammals. The studied area is located on the southern coast of Santa Catarina, between the municipality of Jaguaruna and Passo de Torres. Data refer to collections made by the Zoology Museum Morgana Cirimbelli Gaidzinski , from the University of the Extreme South of Santa Catarina (UNESC), during the period from 2003 to 2016, through third-party activations and systematic monthly monitoring. The stranding frequency in this period was 344 mammals, belonging to 15 species, 10 genera, six families and two different orders. The occurrence of rare and unpublished animals was observed, such as Balaenoptera physalus, Kogia breviceps and Arctocephalus gazela.

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Ups and downs: An insight on the stranding pattern of Guiana dolphins, Sotalia guianensis, in the Amazon Estuary, Northern Brazil

Ruenes,

Costa,

Laeta

et al. 2024

Aquatic Conservation

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Long‐term systematic records of cetacean strandings are valuable indicators of temporal responses of specific cetacean populations and communities to natural or anthropogenic pressures. They also help guide management objectives and conservation actions. Generalized additive models (GAMs) were used to analyse 10 years of systematic and opportunistic surveys of Guiana dolphin strandings in the Amazon Estuary region, Northern Brazil. The spatial distribution of strandings was assessed through kernel density maps, and age‐at‐death structure of this population was described. The model results revealed marked seasonality in the strandings and, by extension, the mortality of Guiana dolphins in the Amazon Estuary. This seasonality varied between the inner estuarine regions and Atlantic coastal area, reflecting the environment's characteristics. Long‐term decline of strandings in the Amazon Estuary inner region and unusual high mortality of young sexually mature individuals were detected. These results, besides the high stranding rate detected for the species, are mostly attributed to the species' interaction with intense fishing activity in the region. Conservation efforts should consider the seasonality of Guiana dolphin strandings in the Amazon Estuary. The systematic monitoring of strandings, especially in high‐frequency areas, is recommended for assessing long‐term species mortality. Additionally, implementing management actions related to the species' interaction with fishing activities, such as regulatory enhancements, gillnet modifications and seasonal no‐fishing zones, is advised. Educational campaigns targeting fishermen and riverine communities are essential to reduce bycatch and the folkloric use of the species. This study underscores the effectiveness of stranding data as a source of biological and ecological information, and as a tool for understanding human actions affecting coastal populations of aquatic mammals. It emphasizes the need for urgent studies to characterize this population, clarify the influence of bycatch as an anthropogenic pressure and implement effective conservation actions to preserve the Guiana dolphin population.

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Review of thirty-two years of toothed whale strandings in Santa Catarina, southern Brazil (Cetacea: Odontoceti)

Cited by 9 publications

References 17 publications

Strandings of cetaceans on the Espírito Santo coast, southeast Brazil, 1975–2015

Strandings of cetaceans on the Espírito Santo coast, southeast Brazil, 1975–2015

Stranding of Marine Mammals in the Period From 2003 to 2016, in the South Ern Coast of Santa Catarina, Brazil

Ups and downs: An insight on the stranding pattern of Guiana dolphins, Sotalia guianensis, in the Amazon Estuary, Northern Brazil

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