How Many More Brumadinhos and Marianas Will We be Faced with Yet?

Lopes, Norberto Peporine; Freitas, Rossimiriam Pereira de; Rocha‐Filho, Romeu C.

doi:10.21577/0103-5053.20190034

Cited by 6 publications

(6 citation statements)

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“…Anthropogenic activities such as changes in the natural courses of rivers, pollution, deforestation, introduction of alien species and overfishing are deleterious to natural fish populations (Sobjak et al, 2017). Moreover, environmental disasters, such as occurred in the Brazilian cities of Mariana (2015) and Brumadinho (2019), leads to almost instantaneous death of hundreds of thousands of fish species and other life forms, strongly affecting the natural fish stocks and, consequently, the regional socioeconomic activities (Carvalho et al, 2017;Santos et al, 2018;Lopes et al, 2019;Pereira et al, 2019;Rudorff et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Domestication strategies for the endangered catfish species Pseudopimelodus mangurus Valenciennes, 1835 (Siluriformes: Pseudopimelodidae)

et al. 2021

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Wild fish domestication can be considered a strategic approach to endangered species conservation, supporting studies and reducing economic and environmental costs. Three of the most important strategies in the domestication processes of fish are the adaptation of wild fish to captivity, the reproduction of the adapted fish and the production and maintenance of the young individuals. That being said, the present study is divided in three experiments: the 1st aimed to adapt wild Pseudopimelodus mangurus to captivity environment using different feeding approaches and a prophylactic strategie; the 2nd aimed to reproduce the adapted individuals from the 1st experiment; and the 3rd aimed to train the P. mangurus juveniles to accept commercial diets. The 1st and 2nd experiments were successful at the maintenance and artificial reproduction of P. mangurus kept in tanks between the reproductive seasons. The results suggest that the reproductive performance of animals kept in captivity (initial relative fertility-IRF = 609.25 ± 36.6 eggs/g) was similar (p > 0,05) to the performance found in wild individuals (IRF = 679.21 ± 45.66 eggs/g). Feed training of P. mangurus juveniles (3rd experiment) was also conducted, evaluating three feeding treatments with different concentrations of bovine heart and ration. At the end of the experiment, the treatment containing half bovine heart and half commercial feeding resulted in the highest values of weight gain (0.10 ± 0.16 g), specific growth rate (0.37 ± 0.11 mm), length (47.78 ± 2.35 mm) and growth (2.15 ± 2.27 mm), suggesting reasonable acceptability to artificial diets in the cultivation of this species. As conclusion, the present study contributes with the development of techniques for the domestication of fresh water fish species with commercial value or andangered of extinction, showing the domestication and reproduction of wild P. mangurus in captivity. However, more studies have to be conducted in order to improve the acceptance of artificial feeding by juveniles and to increase their survival rate.

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Section: Introductionmentioning

confidence: 99%

Domestication strategies for the endangered catfish species Pseudopimelodus mangurus Valenciennes, 1835 (Siluriformes: Pseudopimelodidae)

et al. 2021

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“…Some studies endorse the hypothesis that deforestation in the Amazon is also one of the factors behind the lack of water in São Paulo [28,29]. In addition, two recent accidents in mines (2015 and 2019) are considered the worst environmental disasters that occurred in Brazil [30]. The first one resulted in the death of 19 people and rendered more than 300 families homeless.…”

Section: Discussionmentioning

confidence: 99%

Perception-Based Study on the Value of Nature to People and Land Sparing for Nature in Brazil and Poland

et al. 2020

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Understanding perception about nature is paramount to understanding human behavior and decision making on the environment. We performed a survey-based study in Brazil and Poland to better understand the perception of land sparing for nature and the perceived value of nature. The countries were selected by intentional sampling and given their importance for local and global biodiversity conservation, and complex socio-ecological context of conservation versus agroforestry business. We performed an online questionnaire (N = 1030) in Brazil and face-to-face interviews in Poland (N = 322). We found that Brazilian respondents demonstrated more pro-environmental attitudes than Polish survey participants. Regarding the question: “How much nature that is left should be spared?”, nearly 51% of Brazilians answered “everything”, compared with 13% of Polish respondents. Just under half of the respondents from Poland (45.6%) indicated that half of the nature that is left should be spared. Brazilian respondents also perceived the intrinsic value of nature to a greater extent compared with Polish respondents; in total, 76% of Brazilians respondents entirely agreed that “Nature, its plants and animals have a value on their own, independent of their usefulness for us” versus 25% of Polish respondents. Our study contributes to a better understanding of the leverage points driving pro-environmental attitudes in both countries.

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“…Besides, a recent article shows the possible impact of downgrading Brazilian protection areas to allow mining activities, which makes this scenario even worse (Villén-Pérez et al 2017). Impacts arising from these activities were observed recently in Brazil, when two mine dams failed in Mariana and Brumadinho, both in the state of Minas Gerais, releasing a large amount of iron ore tailings and causing the death of entire populations of aquatic species, with irreversible and immeasurable impacts (Fernandes et al 2016, Lopes et al 2019.…”

Section: Discussionmentioning

confidence: 99%

Vulnerability of Phyllocycla Species (Odonata: Gomphidae) to Current and Planned Anthropic Activities by the Brazilian Government

et al. 2019

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Although most species distribution modeling (SDMs) are constructed at the species level, an appreciation of evolutionary processes has led to modeling above this level. In view of the difficulty in estimating the impacts of human actions on rare or deficient data species, we proposed a new approach to vulnerability assessment based on concepts already well established in the literature (ecological niche, niche conservatism, and extinction thresholds). We used distribution modeling to predict where species of the genus Phyllocycla (Calvert 1948) are most vulnerable to local extinctions and how the implementation of planned anthropic activities by the Brazilian government may modify the potential distribution of the genus in Brazil. We chose that genus because its conservation status is little known, especially due to the data gap about its geographical distribution. We proposed modeling the whole genus and used the niche conservatism theory to justify our methods. The anthropic activities considered in our analysis were agriculture and livestock, rural settlements, energy production installations, transportation, oil extraction, mining, and urbanization. We found that only 55.3% of the original potential distribution of Phyllocycla in Brazil remains available. The area compromised by anthropic activities comprises mainly the Cerrado and Atlantic Forest biomes, with less impact on the Amazon. However, with the implementation of activities planned by the Brazilian government, it is possible that an additional 13.6% of this area will be unavailable to species of Phyllocycla, especially in the Amazon, where interest in mining and the implementation of new hydroelectric production have increased.

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How Many More Brumadinhos and Marianas Will We be Faced with Yet?

Cited by 6 publications

References 0 publications

Domestication strategies for the endangered catfish species Pseudopimelodus mangurus Valenciennes, 1835 (Siluriformes: Pseudopimelodidae)

Domestication strategies for the endangered catfish species Pseudopimelodus mangurus Valenciennes, 1835 (Siluriformes: Pseudopimelodidae)

Perception-Based Study on the Value of Nature to People and Land Sparing for Nature in Brazil and Poland

Vulnerability of Phyllocycla Species (Odonata: Gomphidae) to Current and Planned Anthropic Activities by the Brazilian Government

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