Exclusão social e lutas por moradia na cidade de Manaus

Santos, Carolina Cássia Batista

doi:10.26512/ser_social.v0i3.12836

Cited by 4 publications

(3 citation statements)

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“…Por outro lado, os argumentos utilizados pelos entrevistados para justificar sua preferência pelo tambaqui selvagem demostrou-se basear nas características sensoriais do sabor e na crença da artificialidade do tambaqui de Outras demonstram possuir algum fundamento como no caso do tamanho da cabeça, característica que possivelmente foi citada devido à dificuldade dos consumidores em diferenciar entre o tambaqui e seus híbridos que apresentam uma menor circunferência e peso da cabeça, como é o caso da tambatinga (Paula, 2009), resultado do cruzamento da fêmea do tambaqui (Colossoma macropomum) com o macho da pirapitinga (Piaractus brachypomus). O mesmo deve ser ressaltado quanto à coloração do corpo do peixe que, para ambientes naturais, é descrita na literatura como dependente da cor da água em que o tambaqui está inserido, em locais de água preta a coloração do tambaqui é mais escura e em locais de água barrenta ele apresenta uma coloração mais clara (Santos et al, 2009).…”

Section: Discussionunclassified

A aceitabilidade do tambaqui (Colossoma macropomum) oriundo de piscicultura em Santarém – Pará

Lopes,

Lima,

Braga

2024

Cad. Pedagógico

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Neste trabalho foi descrito como está a aceitabilidade do peixe tambaqui, oriundo de piscicultura no município de Santarém, Pará. Os dados foram coletados semanalmente e em dias alternados durante todo o ano de 2020 mediante a aplicação de questionários semiestruturados e padronizados para os consumidores e comerciantes de pescado. Os dados foram armazenados em planilhas eletrônicas e submetidos à estatística descritiva. Foram realizadas um total de 135 entrevistas para consumidores e 27 para os comerciantes. Os resultados apontam a preferência pelo tambaqui do ambiente natural, considerado mais saboroso e saudável. Apesar disso, já há uma aceitabilidade pelo peixe de cultivo devido à baixa disponibilidade do tambaqui oriundo da natureza no mercado.

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Section: Discussionunclassified

A aceitabilidade do tambaqui (Colossoma macropomum) oriundo de piscicultura em Santarém – Pará

Lopes,

Lima,

Braga

2024

Cad. Pedagógico

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“…When fresh, these three species can be distinguished based on their coloration and the shape and configuration of the body, adipose fin, and maxillary barbels ( Lundberg & Littmann, 2003 ; Santos, Ferreira & Zuanon, 2009 ), although this is not an easy task for non-experts, which may often lead to their misidentification when marketed for human consumption. This problem is accentuated when the fish is sold in the form of frozen fillet or steaks, which removes the morphological characteristics necessary for the visual discrimination of the species.…”

Section: Introductionmentioning

confidence: 99%

Development of rapid and cost-effective multiplex PCR assays to differentiate catfish of the genus Brachyplatystoma (Pimelodidae–Siluriformes) sold in Brazil

Freitas

Barbosa

Vale

et al. 2023

PeerJ

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The catfishes Brachyplatystoma filamentosum (Kumakuma), Brachyplatystoma vaillantii (Laulao catfish), and Brachyplatystoma rousseauxii (gilded catfish) are important fishery resources in Brazil, where they are sold both fresh and in the form of fillets or steaks. These species have morphological similarities, thus, they can be easily misidentified or substituted, especially after processed. Therefore, accurate, sensitive, and reliable methods are needed for the identification of these species to avoid commercial fraud. In the present study, we develop two multiplex PCR assays for the identification of the three catfish species. Each multiplex protocol combined three species-specific forward primers and a universal reverse primer to produce banding patterns able to discriminate the target species unequivocally. The length of the cytochrome C oxidase subunit I (COI) fragments was approximately 254 bp for B. rousseauxii, 405 bp for B. vaillantii, and 466 bp for B. filamentosum, while the control region (CR) assay produced fragments of approximately 290 bp for B. filamentosum, 451 bp for B. vaillantii, and 580 bp for B. rousseauxii. The protocols were sensitive enough to detect the target species at a DNA concentration of 1 ng/µL, with the exception of the CR of B. vaillantii, in which the fragment was only detectable at 10 ng/µL. Therefore, the multiplex assays developed in the present study were sensitive, accurate, efficient, rapid, and cost-effective for the unequivocal identification of the target species of Brachyplatystoma. They can be utilized by fish processing industries to certify their products, or by government agencies to authenticate products and prevent fraudulent commercial substitutions.

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“…On the other hand, A. crassipinnis was categorized as omnivorous with a carnivorous tendency in the Amazon and the São Francisco basins, feeding mainly on small fish and shrimps (Rebelo et al, 2010;Costa et al, 2018). Furthermore, the congeneric Astronotus ocellatus (Cuvier, 1829) displays a carnivorous diet, consuming a large amount of fish (Santos et al, 2009;Trindade & Queiroz, 2012).…”

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Feeding strategy of the introduced Astronotus crassipinnis (Cichlidae) in upper Paraná river floodplain

Lopes

Ganassin

Oliveira

et al. 2022

Iheringia, Sér. Zool.

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The cichlid Astronotus crassipinnis (Heckel, 1840) known as “oscar” or “apaiari” is native to the Amazon basin and presents an omnivorous feeding habit, with a tendency to carnivory. The species was introduced in the upper Paraná River floodplain, where the trophic strategies adopted by the species are not well-known. The objective of this study was to characterize the diet of A. crassipinnis in different size classes to identify ontogenetic differences in diet composition and to determine its feeding behavior in the invaded floodplain. In addition, we experimentally compared the feeding behavior of A. crassipinnis with Hoplias sp. 2, a native piscivorous. We evaluated the predation rate of the two species with different prey (fish and shrimp). Astronotus crassipinnis consumed items from several trophic levels in the juvenile stage, characterizing an omnivore feeding. In the adult stage, A. crassipinnis displayed a specialist strategy in which fish and mollusks dominated the diet. Under controlled conditions, A. crassipinnis consumed more shrimp than Hoplias sp. 2. The preference for shrimp during the experiment contrasted to its feeding in natural environments, showing the potential trophic plasticity of A. crassipinnis. The piscivorous habit in the invaded environment can be considered a trophic strategy of A. crassipinnis, which feeds on an abundant resource in the upper Paraná River floodplain. In conclusion, the ontogenetic diet shifts and the trophic opportunism of the carnivore adults can be the strategies used by the species to invade and settle the floodplain. The piscivorous strategy of A. crassipinnis may impact fish biodiversity, altering ecosystem functioning.

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Exclusão social e lutas por moradia na cidade de Manaus

Cited by 4 publications

References 0 publications

A aceitabilidade do tambaqui (Colossoma macropomum) oriundo de piscicultura em Santarém – Pará

A aceitabilidade do tambaqui (Colossoma macropomum) oriundo de piscicultura em Santarém – Pará

Development of rapid and cost-effective multiplex PCR assays to differentiate catfish of the genus Brachyplatystoma (Pimelodidae–Siluriformes) sold in Brazil

Feeding strategy of the introduced Astronotus crassipinnis (Cichlidae) in upper Paraná river floodplain

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