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  • 1
    Online Resource
    Online Resource
    Table_4.DOCX
    Frontiers Media SA ; 2021
    In:  Frontiers in Ecology and Evolution Vol. 9 ( 2021-6-10)
    Details
    In: Frontiers in Ecology and Evolution, Frontiers Media SA, Vol. 9 ( 2021-6-10)
    Abstract: Non-native fish (NNF) can threaten megadiverse aquatic ecosystems throughout the planet, but limited information is available for the Amazon Region. In this study we review NNF data in the Amazonian macroregion using spatiotemporal records on the occurrence and the richness of NNF from a collaborative network of 35 regional experts, establishing the Amazon NNF database (ANNF). The NNF species richness was analyzed by river basin and by country, as well as the policies for each geopolitical division for the Amazon. The analysis included six countries (Brazil, Peru, Bolivia, Ecuador, Venezuela, and Colombia), together comprising more than 80% of the Amazon Region. A total of 1314 NNF occurrence records were gathered. The first record of NNF in this region was in 1939 and there has been a marked increase in the last 20 years (2000–2020), during which 75% of the records were observed. The highest number of localities with NNF occurrence records was observed for Colombia, followed by Brazil and Bolivia. The NNF records include 9 orders, 17 families and 41 species. Most of the NNF species are also used in aquaculture (12 species) and in the aquarium trade (12 species). The most frequent NNF detected were Arapaima gigas, Poecilia reticulata and Oreochromis niloticus . The current data highlight that there are few documented cases on NNF in the Amazon, their negative impacts and management strategies adopted. The occurrence of NNF in the Amazon Region represents a threat to native biodiversity that has been increasing “silently” due to the difficulties of large-scale sampling and low number of NNF species reported when compared to other South American regions. The adoption of effective management measures by decision-makers is urgently needed and their enforcement needed to change this alarming trend and help protect the Amazon’s native fish diversity.
    Type of Medium: Online Resource
    ISSN: 2296-701X
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.3389/fevo.2021.646702
    DOI: 10.3389/fevo.2021.646702.s001
    DOI: 10.3389/fevo.2021.646702.s002
    DOI: 10.3389/fevo.2021.646702.s003
    DOI: 10.3389/fevo.2021.646702.s004
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2745634-1
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  • 2
    Online Resource
    Online Resource
    Parasitism of Arapaima gigas (Schinz, 1822) in fish farms of the state of Amazonas, Brazil
    FapUNIFESP (SciELO) ; 2022
    In:  Revista Brasileira de Parasitologia Veterinária Vol. 31, No. 4 ( 2022)
    Details
    In: Revista Brasileira de Parasitologia Veterinária, FapUNIFESP (SciELO), Vol. 31, No. 4 ( 2022)
    Abstract: Resumo O objetivo deste trabalho foi investigar as ocorrências de parasitos e determinar as taxas de infestação/infecção parasitária em juvenis de Arapaima gigas de sete pisciculturas do Estado do Amazonas, relacionando às características dessas pisciculturas. Dos 70 A. gigas avaliados, 43 estavam infestados/infectados, com um total de 133 parasitos coletados. As pisciculturas 2, 4 e 6 apresentaram os maiores níveis de prevalência de parasitas (100%, 70%, 70%), intensidade média (4,1±2,6, 8,1±9,2 e 2,1±1,3) e abundância média (4,1±2,6, 5,7±8,1 e 1,5±1,5), respectivamente. A prevalência variou de 30% a 100%, intensidade média de 1,0 a 8,1 e abundância média de 0,3 a 5,7. Monogenea, Digenea, Nematoda (Hysterothylacium sp. e Spirocamallanus sp.) e Acanthocephala (Neoechinorhynchus sp. e Polyacanthorhynchus sp.) foram identificados. Os parasitas Hysterothylacium sp. e Neoechinorhynchus sp. foram os mais prevalentes com 31,43% e 15,71%, respectivamente. Os peixes apresentaram alometria negativa no crescimento e fator de condição constante. Foram discutidas as medidas de prevenção e controle das doenças parasitárias diagnosticadas, assim como práticas profiláticas que contribuam para a biossegurança das fazendas.
    Type of Medium: Online Resource
    ISSN: 1984-2961 , 0103-846X
    Uniform Title: Parasitismo de Arapaima gigas (Schinz, 1822) em pisciculturas do estado do Amazonas, Brasil
    URL: Article
    DOI: 10.1590/s1984-29612022064
    Language: English , Portuguese
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2022
    detail.hit.zdb_id: 2578912-0
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  • 3
    Online Resource
    Online Resource
    Identification of fish specimens of the Tocantins River, Brazil, using DNA barcoding
    Wiley ; 2024
    In:  Journal of Fish Biology Vol. 104, No. 6 ( 2024-06), p. 1924-1939
    Details
    In: Journal of Fish Biology, Wiley, Vol. 104, No. 6 ( 2024-06), p. 1924-1939
    Abstract: The fish fauna of the Tocantins River possesses many endemic species; however, it is little studied in molecular terms and is quite threatened by the construction of several hydroelectric dams. Therefore, the objective of this study was to identify the ichthyofauna of the Tocantins River using DNA barcoding. For this, collections were carried out in five points of this river, which resulted in the capture of 725 individuals from which partial sequences of the cytochrome oxidase subunit I (COI) gene were obtained for genetic analysis. A total of 443 haplotypes were recovered with the mean intraspecific K2P genetic distance of 1.82%. Altogether, 138 species were identified based on morphological criteria, which was a quantity that was much lower than that indicated by the four molecular methods (assemble species by automatic partitioning [ASAP], barcode index number [BIN] , generalized mixed Yule coalescent (GMYC), and Bayesian Poisson tree processes [bPTP]) through which 152–157 molecular entities were identified. In all, 41 unique BINs were obtained based on the data generated in the BOLDSystems platform. According to the result indicated by ASAP (species delimitation approach considered the most appropriate in the present study), there was an increase of 17 molecular entities (12.32%), when compared to the number of species identified through their morphological criteria, as it can show cryptic diversity, candidates for new species, and misidentifications. There were 21 incongruities indicated between the different identification approaches for species. Therefore, it is suggested that these taxonomic problems be cautiously evaluated by experts to solve such taxonomic issues.
    Type of Medium: Online Resource
    ISSN: 0022-1112 , 1095-8649
    URL: Issue
    URL: Article
    DOI: 10.1111/jfb.v104.6
    DOI: 10.1111/jfb.15721
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 410564-3
    detail.hit.zdb_id: 1471958-7
    SSG: 21,3
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Fish, upper Purus River, state of Acre, Brazil
    Pensoft Publishers ; 2008
    In:  Check List Vol. 4, No. 2 ( 2008-06-01), p. 198-
    Details
    In: Check List, Pensoft Publishers, Vol. 4, No. 2 ( 2008-06-01), p. 198-
    Abstract: The ichthyofauna of the headwaters of the main tributaries of the mighty Solimões/Amazonas River  has been little studied. Considering the importance of those environments for the overall fish  diversity in that river system, we surveyed the composition of the fish fauna of the upper portion  of Purus River and two of its tributaries (Caeté and Macapá rivers), state of Acre, Brazil. The collections were done in November 2004, using a seine net and a set of gillnets of different mesh  sizes. A total of 735 specimens belonging to 86 species and 28 families were collected. Eight  species, Creagrutus occidaneus, Phenacogaster pectinatus, Prionobrama filigera, Moenkhausia cf.  lepidura, Leptagoniates pi (Characidade), Henonemus punctatus (Trichomycteridae), Toracocharax  stellatus (Gateropelecidae), and Eigenmannia macrops (Sternopygidae) composed nearly half of the  specimens collected. This survey adds 48 new records to the ichthyofauna of Purus River and  elevates to 243 the number of known fish species in that river, but a greater sampling effort is necessary to produce a reasonably complete picture of the fish diversity in the basin.
    Type of Medium: Online Resource
    ISSN: 1809-127X
    URL: Article
    DOI: 10.15560/4.2.198
    Language: Unknown
    Publisher: Pensoft Publishers
    Publication Date: 2008
    detail.hit.zdb_id: 2252867-2
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  • 5
    Online Resource
    Online Resource
    Biologia reprodutiva e hábitos alimentares do rodóstomo (Hemigrammus bleheri) um peixe ornamental da Bacia do Médio Rio Negro, Estado do Amazonas, Brasil.
    Boletim do Instituto de Pesca ; 2017
    In:  Boletim do Instituto de Pesca Vol. 43, No. 1 ( 2017-03-21)
    Details
    In: Boletim do Instituto de Pesca, Boletim do Instituto de Pesca, Vol. 43, No. 1 ( 2017-03-21)
    Abstract: Esse estudo teve como objetivo descrever a biologia reprodutiva e os hábitos alimentares de Hemigrammus bleheri do médio Rio Negro, estado do Amazonas-Brasil, ao longo de um ciclo hidrológico. Para tanto, analisaram-se os estádios de maturação gonadal, tamanho de primeira maturação sexual (L50), fecundidade e perí­­odo reprodutivo de 260 indiví­­duos, assim como pesquisou-se o conteúdo estomacal e calculou-se do í­­ndice de repleção estomacal de 177 indiví­­duos. Os resultados obtidos demonstram que a espécie possui desova parcelada, com oócitos variando entre 0,06 e 0,66 mm de dií­¢metro e fecundidade entre 101 e 721 oócitos. O L50 foi estimado em 2,8 cm para fêmeas e 2,6 cm para machos. As fêmeas amadurecem com a subida do rio (dezembro a maio) e as desovas ocorrem em maior proporção no final da enchente (março a maio). A espécie é oní­­vora, consumindo grande parte dos alimentos de origem autóctone. A dieta básica mostrou variações sazonais em sua composição, pois observou-se que microcrustáceos são frequentes nos perí­­odos de enchente/cheia, e que algas filamentosas, quironomí­­deos e fragmentos vegetais são mais frequentes na vazante/seca. Alterações sazonais na atividade alimentar foram registradas provavelmente influenciadas pelo pulso de inundação. O grau de repleção estomacal foi maior na enchente/cheia e menor na vazante/seca.
    Type of Medium: Online Resource
    ISSN: 1678-2305 , 0046-9939
    URL: Article
    DOI: 10.20950/1678-2305.2017v43n1p65
    Language: Unknown
    Publisher: Boletim do Instituto de Pesca
    Publication Date: 2017
    detail.hit.zdb_id: 2155666-0
    SSG: 21,3
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  • 6
    Online Resource
    Online Resource
    FISHING PRODUCTION OF 〈i〉Pinirampus pirinampu〈/i〉 AND 〈i〉Brachyplatystoma platynemum〈/i〉 CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)
    Boletim do Instituto de Pesca ; 2020
    In:  Boletim do Instituto de Pesca Vol. 46, No. 2 ( 2020-10-09)
    Details
    In: Boletim do Instituto de Pesca, Boletim do Instituto de Pesca, Vol. 46, No. 2 ( 2020-10-09)
    Abstract: The present work analyzed landing events of commercial fishing boats carrying two species of large catfish in 11 fishing landing sites along the Madeira River, temporally and spatially characterizing the exploitation of these species before and after the closure of the Jirau and Santo Antônio hydroelectric dams. Our results show that the Madeira River dams may be negatively impacting the fishing production of Pinirampus pirinampu and Brachyplatystoma platynemum catfish, drastically reducing these species’ biomass as well as the incomes of regional fishers. If the irreversible loss of these species of Amazonian catfish is to be avoided, public policies and measures for the management and sustainable handling of this fishery resource must be urgently carried out.
    Type of Medium: Online Resource
    ISSN: 1678-2305 , 0046-9939
    URL: Article
    DOI: 10.20950/1678-2305.2020.46.2.581
    Language: Unknown
    Publisher: Boletim do Instituto de Pesca
    Publication Date: 2020
    detail.hit.zdb_id: 2155666-0
    SSG: 21,3
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