{"id":2380,"date":"2017-04-28T13:31:38","date_gmt":"2017-04-28T16:31:38","guid":{"rendered":"http:\/\/biologo.com.br\/bio\/?p=2380"},"modified":"2023-09-12T11:39:44","modified_gmt":"2023-09-12T14:39:44","slug":"os-peixes-eletricos-da-amazonia","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/os-peixes-eletricos-da-amazonia\/","title":{"rendered":"Os peixes el\u00e9tricos da Amaz\u00f4nia"},"content":{"rendered":"<p><span style=\"font-size: 14pt; color: #000000;\"><span style=\"color: #3366ff;\"><strong>Os peixes el\u00e9tricos da Amaz\u00f4nia:<\/strong><\/span> A Amaz\u00f4nia\u00a0tem a maior diversidade de peixes de \u00e1gua doce do planeta. Entre eles, destacam-se os peixes el\u00e9tricos.<\/span><\/p>\n<p><span style=\"font-size: 14pt; color: #000000;\">Enquanto a eletricidade s\u00f3 existe para n\u00f3s h\u00e1 pouco mais de cem anos, esses animais fazem uso dela h\u00e1 mais de 200 milh\u00f5es de anos. Nesse document\u00e1rio voc\u00ea conhece esses formid\u00e1veis peixes.<\/span><\/p>\n<h2 style=\"text-align: center;\"><span style=\"font-size: 24pt; color: #000000;\"><strong><span style=\"font-family: 'courier new', courier, monospace;\">Os peixes el\u00e9tricos da Amaz\u00f4nia<\/span><\/strong><\/span><\/h2>\n<p><iframe loading=\"lazy\" title=\"Entenda como o poraqu\u00ea d\u00e1 choque!\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/36ib9lk_3vU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/p>\n<p><span style=\"color: #000000;\">O poraqu\u00ea \u00e9 apenas uma entre mais de 120 esp\u00e9cies de peixes el\u00e9tricos que existem na Am\u00e9rica do Sul.<\/span><\/p>\n<p><span style=\"color: #000000;\">As descargas produzidas prestam-se tanto \u00e0 subsist\u00eancia alimentar, sendo utilizadas para atordoar as presas das quais o animal se alimenta (geralmente peixes menores), quando \u00e0 autodefesa do animal em raz\u00e3o de perigo iminente.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt;\"><strong><a href=\"http:\/\/biologo.com.br\/bio\/amazonia-desconhecida\/\">Amaz\u00f4nia Desconhecida<\/a><\/strong><\/span><\/li>\n<li><span style=\"font-size: 14pt;\"><strong><a href=\"http:\/\/biologo.com.br\/bio\/o-futuro-da-amazonia\/\" target=\"_blank\" rel=\"noopener noreferrer\">O futuro da Amaz\u00f4nia<\/a><\/strong><\/span><\/li>\n<\/ul>\n<h3><span style=\"font-size: 12pt; color: #000000;\"><strong>Peixes el\u00e9tricos\u00a0<\/strong><\/span><\/h3>\n<figure id=\"attachment_2382\" aria-describedby=\"caption-attachment-2382\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2382\" data-permalink=\"https:\/\/biologo.com.br\/bio\/os-peixes-eletricos-da-amazonia\/poraque\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"poraque\" data-image-description=\"&lt;p&gt;By KoS (Own work) [GFDL (http:\/\/www.gnu.org\/copyleft\/fdl.html) or CC BY-SA 3.0 (http:\/\/creativecommons.org\/licenses\/by-sa\/3.0)], via Wikimedia Commons&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;&amp;#8220;Electrophorus electricus&amp;#8221; Aquarium tropical du Palais de la Porte Dor\u00e9e. Paris. France. By KoS&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-2382 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque-300x167.jpg?resize=300%2C167\" alt=\"Os peixes el\u00e9tricos da Amaz\u00f4nia - Electrophorus electricus\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/04\/poraque.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-2382\" class=\"wp-caption-text\"><span style=\"color: #000000;\"><span style=\"font-size: 10pt;\"><em>Electrophorus electricus.<\/em> Aquarium tropical du Palais de la Porte Dor\u00e9e.<\/span><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">As esp\u00e9cies de peixes el\u00e9tricos podem ser de diversos de g\u00eaneros, de \u00e1gua doce\u00a0ou salgada e com cargas el\u00e9tricas vari\u00e1veis.\u00a0<\/span><span style=\"color: #000000;\">S\u00e3o dotados de c\u00e9lulas especiais em regi\u00e3o espec\u00edfica do corpo (parte m\u00e9dio-posterior, at\u00e9 a cauda).<\/span><\/p>\n<p><span style=\"color: #000000;\">S\u00e3o capazes de gerar diferen\u00e7as de potencial el\u00e9trico e suscet\u00edveis de, por associa\u00e7\u00e3o em s\u00e9rie, desenvolver capacidade de descarga externa total apreci\u00e1vel, a variar de poucas dezenas a muitas centenas de volts, em correntes tamb\u00e9m vari\u00e1veis de fra\u00e7\u00e3o de um a alguns amperes, os valores destas correntes a dependerem da resist\u00eancia el\u00e9trica do receptor (presa aqu\u00e1tica ou amea\u00e7a potencial ou ser humano em encontro eventual).<\/span><\/p>\n<p><span style=\"color: #000000;\">Cada vez que os eletr\u00f3citos s\u00e3o estimulados por um comando que vem do c\u00e9rebro, eles produzem uma pequena descarga el\u00e9trica de aproximadamente 120 mil\u00e9simos de volt (120 milivolts).<\/span><\/p>\n<p><span style=\"color: #000000;\"> Como o \u00f3rg\u00e3o el\u00e9trico \u00e9 formado por milhares de eletr\u00f3citos que se descarregam ao mesmo tempo, um peixe como o brasileiro poraqu\u00ea (<em>Electrophorus electricus<\/em>), com mais de 2 metros de comprimento\u00a0capaz de gerar mais de 600 volts numa \u00fanica descarga.<\/span><\/p>\n<h4><span style=\"color: #000000; font-size: 12pt;\"><em><strong>O poraqu\u00ea (Electrophorus electricus)\u00a0<\/strong><\/em><span style=\"color: #ffffff;\"><strong>Os peixes el\u00e9tricos da Amaz\u00f4nia<\/strong><\/span><\/span><\/h4>\n<p><span style=\"color: #000000;\">O poraqu\u00ea (<em>Electrophorus electricus<\/em>) \u00e9 uma esp\u00e9cie de peixe actinopter\u00edgio, gimnotiforme, que pode chegar a dois metros de comprimento e pesar cerca de vinte quilogramas. \u00c9 uma das conhecidas esp\u00e9cies de peixe-el\u00e9trico, com capacidade de gera\u00e7\u00e3o el\u00e9trica que varia de cerca de trezentos volts a cerca de 0,5 amp\u00e8res at\u00e9 cerca de 1 500 volts a cerca de tr\u00eas amp\u00e8res.<\/span><\/p>\n<blockquote><p><span style=\"color: #ffffff; font-size: 14pt;\">O termo &#8220;poraqu\u00ea&#8221; vem da l\u00edngua tupi e significa &#8220;o que faz dormir&#8221; ou &#8220;o que entorpece&#8221;, em refer\u00eancia \u00e0s descargas el\u00e9tricas que produz. Al\u00e9m deste nome, tamb\u00e9m \u00e9 chamado de enguia, enguia-el\u00e9trica, mu\u00e7um-de-orelha, pixund\u00e9, pixundu ou peixe-el\u00e9trico (embora n\u00e3o seja o \u00fanico peixe-el\u00e9trico existente).<\/span><\/p><\/blockquote>\n<p><span style=\"color: #000000;\">\u00c9 t\u00edpico da Bacia amaz\u00f4nica (rios Amazonas, Orinoco, Madeira), bem como dos rios do estado brasileiro do Mato Grosso, Rond\u00f4nia. Tamb\u00e9m encontra-se em quase toda a Am\u00e9rica do Sul.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"font-size: 10pt;\">fonte: Wikip\u00e9dia.org<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Os peixes el\u00e9tricos da Amaz\u00f4nia: A Amaz\u00f4nia\u00a0tem a maior diversidade de peixes de \u00e1gua doce do planeta. Entre eles, destacam-se<\/p>\n","protected":false},"author":1,"featured_media":2382,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"video","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[129,143,19,126,27],"tags":[],"class_list":["post-2380","post","type-post","status-publish","format-video","has-post-thumbnail","hentry","category-biodiversidade","category-biofisica","category-ictiologia","category-videos","category-zoologia","post_format-post-format-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Os peixes el\u00e9tricos da Amaz\u00f4nia: Document\u00e1rio - Ictiologia e biof\u00edsica<\/title>\n<meta name=\"description\" content=\"A Amaz\u00f4nia tem a maior diversidade de peixes de \u00e1gua doce do planeta. 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