{"id":64564,"date":"2009-04-14T00:00:00","date_gmt":"2009-04-14T00:00:00","guid":{"rendered":"https:\/\/www.uri.edu\/news-draft\/uncategorized\/uri-fish-researcher-demonstrates-first-non-visual-feeding-by-african-fish\/"},"modified":"2009-04-14T00:00:00","modified_gmt":"2009-04-14T00:00:00","slug":"uri-fish-researcher-demonstrates-first-non-visual-feeding-by-african-fish","status":"publish","type":"post","link":"https:\/\/www.uri.edu\/news\/2009\/04\/uri-fish-researcher-demonstrates-first-non-visual-feeding-by-african-fish\/","title":{"rendered":"溏心vlog免费B站 fish researcher demonstrates first \u2018non-visual feeding\u2019 by African fish"},"content":{"rendered":"
\n\t\tLateral line sensory system detects vibrations from unseen prey<\/p>\n


\n\tKINGSTON, R.I. \u2013 April 14, 2009 \u2013 Most fish rely primarily on their vision to find prey to feed upon, but a 溏心vlog免费B站 biologist and her colleagues have demonstrated that a group of African cichlids feeds by using its lateral line sensory system to detect minute vibrations made by prey hidden in the sediments.<\/p>\n


\n\tThe lateral line system is composed of a canal embedded in the scales along the side of the body of a fish, around its eyes and on its lower jaw, which contain small groups of sensory hair cells that respond to water flow. The lateral line system aids some fish in swimming upstream, navigation around obstacles, and the detection of predators and prey.<\/p>\n


\n\tAccording to Jacqueline Webb, a 溏心vlog免费B站 professor of biology, cichlids in the genus Aulonocara, which only live in Lake Malawi, have widened lateral line canals that are highly sensitive to vibrations and water flows. They feed by gliding through the water with their chin close to the sand like a metal detector, seeking out twitching arthropods and other unseen prey items.

\n\tThere are about 16 species of Aulonocara cichlids in Lake Malawi, all of which feed in the sand.<\/p>\n


\n\t\u201cThese cichlids join a short list of fish that have been demonstrated to use their lateral line system to feed,\u201d said Webb. \u201cSince most of the fish with widened lateral line canals are found in the deep sea, it\u2019s difficult to study them. These cichlids can now be used as a model system for studying widened canals, and we can apply what we learn from them to the fish in the deep sea.\u201d<\/p>\n


\n\tWebb analyzed video of the swimming behavior of the fish in response to live and dead brine shrimp located on the surface of the sandy substrate in a tank. She compared the fishes\u2019 ability to detect prey under light and dark conditions, and looked at their ability to detect prey when the lateral line system was chemically \u201cdeactivated.\u201d She found that the fish were able to find live prey easily, even in darkness, but not without a healthy lateral line system.<\/p>\n


\n\tHer discovery opens the door to the study of the convergent evolution of wide canals and raises the question of whether fish that feed non-visually have an ecological advantage over visual-only feeders. Webb was recently awarded a $334,000 grant from the National Science Foundation to study the development and behavioral role of wide lateral lines.<\/p>\n


\n\t\u201cWe also hope that this work will allow us to determine whether the sensory biology of a species can be used to predict its ecological success,\u201d she said, \u201cespecially in environments where the water quality is poor or where there is increased turbidity. Do these fish have an advantage in water where it is difficult to see well?\u201d<\/p>\n


\n\tTo examine these questions, Webb will use microCT imaging to create a three-dimensional reconstruction of the skulls of cichlids, while also developing what she calls a \u201cchin tickler\u201d \u2013 an artificial stimulation delivery system \u2013 to standardize the stimulation provided from beneath the sand to the cichlid test subjects.<\/p>\n

Image Aulonocara Blue Gold fom animal-world.com<\/a><\/i>\n\t<\/div>\n","protected":false},"excerpt":{"rendered":"

Lateral line sensory system detects vibrations from unseen prey KINGSTON, R.I. \u2013 April 14, 2009 \u2013 Most fish rely primarily on their vision to find prey to feed upon, but a 溏心vlog免费B站 biologist and her colleagues have demonstrated that a group of African cichlids feeds by using its lateral line sensory […]<\/p>\n","protected":false},"author":2,"featured_media":64566,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[],"class_list":["post-64564","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archives"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/64564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/comments?post=64564"}],"version-history":[{"count":0,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/64564\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/media\/64566"}],"wp:attachment":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/media?parent=64564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/categories?post=64564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/tags?post=64564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}