{"id":249879,"date":"2017-12-05T17:49:34","date_gmt":"2017-12-05T19:49:34","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=249879\/"},"modified":"2017-12-05T17:49:34","modified_gmt":"2017-12-05T19:49:34","slug":"tiny-spiders-have-different-mechanisms-for-recognizing-colors","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/tiny-spiders-have-different-mechanisms-for-recognizing-colors\/","title":{"rendered":"Tiny spiders have different mechanisms for recognizing colors"},"content":{"rendered":"<div id=\"attachment_249880\" style=\"max-width: 310px\" class=\"wp-caption alignright\"><a href=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2017\/12\/012-notas_255_12.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-249880\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2017\/12\/012-notas_255_12-300x272.jpg\" alt=\"\" width=\"300\" height=\"272\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">Jurgen Otto | Wayne P. Maddison\/Wikimedia Commons<\/span><\/a> Two species of the Australian spider <em>Maratus<\/em> (<em>above and right<\/em>) and one of the <em>Habronattus<\/em> species from North America (<em>below<\/em>): retina cells to see blue and red<span class=\"media-credits\">Jurgen Otto | Wayne P. Maddison\/Wikimedia Commons<\/span><\/p><\/div>\n<p>Different species of jumping spiders, smaller than a thumbnail, have distinct mechanisms for seeing colors, according to a study by the University of Cincinnati (UC) in the United States. \u201cIt\u2019s very rare to see bright colors on most spiders, as they don\u2019t usually have the visual sensitivity to perceive color beyond drab blues, greens and browns,\u201d says Nate Morehouse, a biologist at UC, in a statement to the National Science Foundation, the federal agency that funded the study. \u201cBut certain groups of jumping spiders deviate from this pattern. They recognize reds, yellows and oranges, and the males display their bodies with bright colors that they use during courtship dances.\u201d The males also exhibit abdomen appendices that move like airplane flaps. Researchers identified various selection mechanisms and combinations of colors in the eyes of the spiders of the two genera studied \u2013 the <em>Habronattus<\/em> of North America and the <em>Maratus<\/em> of Australia, both of the Saticidae family, with 5,000 species. The visual systems evolved independently. <em>Habronattus<\/em> have a filter that is sensitive to red, which produces a new type of retina cell that sees red. <em>Maratus<\/em> have no filters, but they have two additional types of photoreceptors, one-blue sensitive and one red-sensitive. The UC team characterized the sensitivity of spiders to colors using microspectrophotometry by measuring photoreceptor cells in the retina directly and by mathematically modeling the visual system.<\/p>\n","protected":false},"excerpt":{"rendered":"Tiny spiders have different mechanisms for recognizing colors","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1651],"tags":[206,209,218,236,266],"coauthors":[785],"class_list":["post-249879","post","type-post","status-publish","format-standard","hentry","category-notes","tag-biodiversity","tag-biology","tag-ethology","tag-physiology","tag-zoology"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/249879","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=249879"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/249879\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=249879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=249879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=249879"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=249879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}