Notícia

Agencia Brasil (espanhol)

Researchers embark on expedition in search of electric fish in Amazon (235 notícias)

Publicado em 25 de fevereiro de 2024

Rádio GuarujaMix Digitado AM News Observador Regional Acessa.com Revista Go Outside online Cenário MT Paracatu News Clic Portela Capital Liberal Jornal O Diário (MT) online - Clique F5 Mix Vale Preto no Branco (Cascavel, PR) Diário de Petrópolis (RJ) online Imediato Repórter PB Blog Searadionaotoca JBNews Portal MPiauí Tribuna do Sertão TV Brusque NX1 Água Boa News ABC do ABC Jornal Correio (Salvador, BA) online Portal 38 news Ata News CGN Alto Tietê Agora Correio Central Hoje em Dia online O Dia Mais Banzeiro comVc Portal O Otimista online Jornal Dia Dia Blog do Mário Adolfo Perfil (Brasil) Um Só Planeta Portal JE - Jornal Eletrônico Panorama Capixaba Voz do Bico Portal do Jota Jornal NH online Amambai Notícias Idest Correio de Carajás Blog do Miro Amazonas 1 ID News DF na Mídia Correio do Brasil online A Onça Informativo MS Jornal Roraima Hoje A Província do Pará Economia em Pauta Aracaju Agora Notícias Jovem Pan News Santos Blog da Amazônia Atual MT O Democrata online Liberal FM 92,7 Eixo Capital Revista Cenarium online Bacana News O Dia (RJ) online Jornal A Cidade (Ponta Porã, MS) Rádio Sanca Web TV Meia Hora online Oeste 360 Folha Machadense Bomba Bomba Jornal do Oeste (Toledo, PR) online Centro Oeste News Revelando São Carlos Folha Nobre News Rondônia Viu isso aqui? Jornal do Vale (Ceres, GO) online Rondônia Dinâmica Nitro News Brasil Hoje São Paulo VoxMS Jornal Floripa São Bento em Foco Planeta Amazônia Novo Cantu Notícias Giro Marília ZUG São Paulo Jornal Portal do Marcos Santos Jornal Guthenberg Portal Edilene Mafra Flipboard Brasil TV Caeté O Chefão da Notícia Manaus Alerta Macuxi Última Pauta Cacoal Notícias Portal Uno Midias 18 Horas Portal Você Online Rolim Notícias O Acre Agora Agro2 A Gazeta News (MS) online Blog da Luciana Pombo Tá no site Portal Vamos O Alfenense Plantão dos Lagos Alagoas ao Vivo Rondônia ao Vivo Jornal Opinião (Caeté, MG) Tribuna do Agreste O Contestado O Correio do Povo (Jaraguá do Sul, SC) online AM Post Metropolitana MS Acre ao Vivo Expresso Regional Salvador Notícias SiteBarra Rádio BandNews Difusora Manaus 93.7mhz O Observador online Alta Floresta Notícias Gente de Opinião Rondônia Dinâmica News Rondônia Portal P1 Tudo Rondônia Artigos em Foco Dimensi Aktual Portal do Governo do Estado de Rondônia Real Radio Tv Brasil Badalo Canal Rural Buobe Dipu - Diário Popular (São Paulo, SP) Acontece no RS Conexão MT O Empallador Passando a Limpo Jornal Floripa Rádio Magnus O Correspondente Fala Piauí Jornal Correio de Uberlândia TV Web Goiás TV Play Regional (MG) DF Mais Novidades MT TV Notícias 24 Horas ABC Mais Koiote Gazeta da Amazônia Osalim Agribusiness Notícia Marajó Planeta 92 (AM) CNA7 CN Cariri MRZ Notícias Jornal Integração Conquista de Fato Portal Deri (PI) Portal Ponta Porã MS JNA Notícias (MS) Portal Paranatinga Jornal Correio Centro Oeste online A Tribuna (Santos, SP) online Portal de Notícias de Barra Mansa Diário Digital (MS) Jornal O Popular HB Jornal a Voz do Triângulo (MG) Cenário News Minuto MT O Estadão Mato Grossense online Portal Casa Nova Radar Digital Brasília Voz MT EniNews Estação Livre MT Veja Popular Bahia10 Bom Dia Baixada Portal Nordeste MS em Foco OffNews O Gazetão BR230 Aparecida do Taboado Notícias CNBV - Centro de Notícias Boa Vista Toda Hora Fatos e Fotos News Portal DF Noticias Minha Três Lagoas Reverbero Portal MT News Juína News Mato Grosso Mais Notícias Ponto de Vista com Nelson Freire Barbacena em Tempo

A group of researchers began an expedition this week to search the depths of the Negro River, in the state of Amazonas, in streams and other environments in the region for species belonging to the Gymnotiformes order, known as electric fish. Besides identifying new species, the researchers intend to contribute to raising awareness and preserving local biodiversity.

The expedition is part of the Diversity and Evolution of Gymnotiformes project, coordinated by Naercio Menezes, a professor at the Zoology Museum of the University of São Paulo (MZ-USP), which has been running since 2017. Over the years, one of the results was the discovery and description, in 2019, of two species of Electrophorus electricus, known in the Amazon as poraquê.

"In one of our collections, one of our researchers discovered two new species, one of which produces 650 volts through its electric organ, enough to knock a person over, so to speak. This discovery caused quite a stir," said Menezes, who reported that it was published in the New York Times.

He points out that the Zoology Museum is highly representative of freshwater fish from all over Brazil and part of South America. He also emphasizes that the work is aimed at preservation, stating, “Our intention is to showcase the existing diversity and highlight the threat posed by the disappearance of species due to the construction of hydroelectric power stations, fires, mining, and deforestation.”

One of the species the researchers will be searching for is Iracema caiana, which was collected only once in 1968 in the region of the expedition. They will also be looking for other species that could contribute to ongoing studies or even lead to the description of new species. The expedition, which is expected to last until March 2, will involve around 20 people on the boat, including crew and researchers, who will travel upriver from Manaus to Santa Isabel do Rio Negro.

Amazon drought

Menezes stated that the expedition's favorable conditions, including the use of a net that drags along the riverbed and a large team of researchers, make the possibility of collecting specimens very high. This is further enhanced by the specific period in which the expedition will take place.

"We're aiming to collect at an opportune time. Last year's significant drought in the Amazon basin led to increased turbidity in the waters of the Negro and Branco, our collection sites. We hope that this circumstance concentrated the fish in specific areas," he explained.

The researchers will also employ molecular studies, where tissue samples undergo DNA analysis. This method allows for more precise species identification and aids in morphological and anatomical research.

Menezes explains that electric fish use the electricity they produce for feeding and communication. The Diversity and Evolution of Gymnotiformes project also revealed that one species, the poraquês, engages in social predation, where prey is captured in groups.

"In the past, it was believed that they fed in isolation. However, they have the ability to surround the minnows (piabinhas)—small freshwater fish—and emit continuous shocks. The species then jumps out of the water and the poraquês consume their prey. This behavior was previously unknown," he explained.

Translation: Mário Nunes - Edition: Nádia Franco