Marine debris ingestion and human impacts on the Pygmy sperm whale (Kogia breviceps) in southern Brazil

Brentano, Renata; Petry, Maria Virgı́nia

doi:10.1016/j.marpolbul.2019.110595

Cited by 20 publications

(11 citation statements)

References 44 publications

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“…The pygmy sperm whale was the most frequent deep diving species to experience litter-related strandings which is consistent with the findings of Beatson (2007). The ingestion of plastic by pygmy sperm whales was also reported by (Brentano and Petry 2020) in southern Brazil where ingested plastic bags caused gastric obstruction. Pygmy sperm whales forage on commercially important fish species such as hake (Brentano and Petry 2020), and it has been suggested that they are more likely to ingest litter due to the depletion of their prey from fishing activities, such as deep-sea trawling (Baird and Hooker 2000).…”

Section: Deep Diving Foragers and Ingestionsupporting

confidence: 86%

Contribution of social media to cetacean research in Southeast Asia: illuminating populations vulnerable to litter

et al. 2021

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Litter in the marine environment, in particular plastic, is a significant threat to marine megafauna. Cetaceans are known to ingest or become entangled in marine debris, likely impacting individuals and populations. Southeast Asia is a biodiversity hotspot and harbours a diverse cetacean assemblage. However, there are key knowledge gaps relating to the impact of litter in this region due the lack of experts to survey its vast coastlines. This study aims to address such gaps by using social media, gathering data from Facebook posts relating to cetacean strandings and litter across Southeast Asia between 2009 and 2019. Results show that at least 15 cetacean species have been negatively affected by litter, with ingestion most commonly affecting deep-diving species. Epipelagic and mesopelagic foragers were most vulnerable to entanglement. Davao in the Philippines was identified as a litter-related stranding hotspot. The Irrawaddy dolphin (Orcaella brevirostris) and pygmy sperm whale (Kogia breviceps) are particularly vulnerable to litter. The combination of social media and peer reviewed literature can help build a more complete picture of the spatial distribution of marine litter and the scale of the impact it has on cetacean populations. In this study we provide details of a valuable online tool for helping to understand the impact of marine litter on cetaceans and other charismatic species that are a focus of community engagement.

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Section: Deep Diving Foragers and Ingestionsupporting

confidence: 86%

Contribution of social media to cetacean research in Southeast Asia: illuminating populations vulnerable to litter

et al. 2021

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“…In this investigation, we report the occurrence of a carbapenem-resistant NDM-1-producing E. coli isolated from a pygmy sperm whale. In this regard, the pygmy sperm whale is a small cetacean from the Kogiidae family that is found in mesopelagic regions near the continental shelves (between 600 and 1,200 m depth) of the tropical and temperate Atlantic, Indian, and Pacific Oceans (Moura et al, 2016;Brentano and Petry, 2020;Kiszka and Braulik, 2020). Although cetacean research in oceanic waters has significantly progressed over the last decades, there is scarce information on the population, distribution, and behavior of pygmy sperm whales (Kiszka and Braulik, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…This could be explained by their short surfacing interval, cryptic surface behavior, and long deep dives, which make challenging to see these whales in the ocean (Kiszka and Braulik, 2020). Indeed, most data come from stranded animals, being generally affected by anthropogenic material, including accidental ingestion of plastic debris (Brentano and Petry, 2020). Alarmingly, increasing reports of WHO critical priority Gram-negative pathogens (MCR-type, carbapenemaseand/or ESBL-producing bacteria) on the Brazilian coast have been occurred in the last decade, which may indicate, in part, the adaptation of such pathogens in the sea.…”

Section: Resultsmentioning

confidence: 99%

Genomic Analysis of a Highly Virulent NDM-1-Producing Escherichia coli ST162 Infecting a Pygmy Sperm Whale (Kogia breviceps) in South America

et al. 2022

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Carbapenemase-producing Enterobacterales are rapidly spreading and adapting to different environments beyond hospital settings. During COVID-19 lockdown, a carbapenem-resistant NDM-1-positive Escherichia coli isolate (BA01 strain) was recovered from a pygmy sperm whale (Kogia breviceps), which was found stranded on the southern coast of Brazil. BA01 strain belonged to the global sequence type (ST) 162 and carried the blaNDM–1, besides other medically important antimicrobial resistance genes. Additionally, genes associated with resistance to heavy metals, biocides, and glyphosate were also detected. Halophilic behavior (tolerance to > 10% NaCl) of BA01 strain was confirmed by tolerance tests of NaCl minimal inhibitory concentration, whereas halotolerance associated genes katE and nhaA, which encodes for catalase and Na+/H+ antiporter cytoplasmic membrane, respectively, were in silico confirmed. Phylogenomics clustered BA01 with poultry- and human-associated ST162 lineages circulating in European and Asian countries. Important virulence genes, including the astA (a gene encoding an enterotoxin associated with human and animal infections) were detected, whereas in vivo experiments using the Galleria mellonella infection model confirmed the virulent behavior of the BA01 strain. WHO critical priority carbapenemase-producing pathogens in coastal water are an emerging threat that deserves the urgent need to assess the role of the aquatic environment in its global epidemiology.

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“…To date, very little is known about the additive or synergistic effects of POPs and other micropollutants, but there is evidence of increased toxicity in the pollutant mixture, as well as their bioavailability in tropical marine environments while facing climate change . Cumulative effects of multiple impacts must also be addressed for the studied populations of rough-toothed dolphins, such as habitat degradation, , ingestion of plastic (MAQUA, unpublished data) due to increased pollution, , entanglement in fishing gears, , and anthropogenic noise pollution, all of which are easily detected and present in a daily basis within the SE and S Brazilian coast.…”

Section: Resultsmentioning

confidence: 99%

Long-Term Consequences of High Polychlorinated Biphenyl Exposure: Projected Decline of Delphinid Populations in a Hotspot for Chemical Pollution

Oliveira-Ferreira

Carvalho

Santos-Neto

et al. 2021

Environ. Sci. Technol.

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Rough-toothed dolphins, Steno bredanensis, are closely associated with coastal waters in the Southwestern Atlantic Ocean, increasing the exposure to multiple stressors, such as chemical pollution. Persistent organic pollutants (POPs) are known to affect the health of cetacean species. To comprehend the potential impacts of POPs on populations’ viability, it is necessary to distinguish populations and predict their risk of long-term exposure. Blubbers of rough-toothed dolphins (n = 28) collected along the southeastern (SE) and southern (S) Brazilian coast were screened for polychlorinated biphenyls (PCBs) and pesticides in a gas chromatograph coupled to a mass spectrometer. Based on the contamination profile, a discriminant function analysis separated the rough-toothed dolphins into three ecological populations: two coastal and one offshore. POP concentrations were the highest reported for the species worldwide and highest among the delphinids in Brazilian waters, reaching 647.9 μg g–1 lw for PCBs. The SE population presented 212.9 ± 163.0, S population presented 101.0 ± 96.7, and OCS/S population presented 183.3 ± 85.3 μg g–1 lw (mean ± SD) of PCBs. The potential risk of effects triggered by elevated PCB concentrations was assessed in an individual-based model. A risk of severe decline in population size is projected for the three populations in the next 100 years, especially in SE Brazil, varying between 67 and 99%.

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Marine debris ingestion and human impacts on the Pygmy sperm whale (Kogia breviceps) in southern Brazil

Cited by 20 publications

References 44 publications

Contribution of social media to cetacean research in Southeast Asia: illuminating populations vulnerable to litter

Contribution of social media to cetacean research in Southeast Asia: illuminating populations vulnerable to litter

Genomic Analysis of a Highly Virulent NDM-1-Producing Escherichia coli ST162 Infecting a Pygmy Sperm Whale (Kogia breviceps) in South America

Long-Term Consequences of High Polychlorinated Biphenyl Exposure: Projected Decline of Delphinid Populations in a Hotspot for Chemical Pollution

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