{"id":60275,"date":"2012-08-03T00:00:00","date_gmt":"2012-08-03T00:00:00","guid":{"rendered":"https:\/\/www.uri.edu\/news-draft\/uncategorized\/uri-researcher-deep-sea-squid-can-jettison-its-arms-as-defensive-tactic\/"},"modified":"2012-08-03T00:00:00","modified_gmt":"2012-08-03T00:00:00","slug":"uri-researcher-deep-sea-squid-can-jettison-its-arms-as-defensive-tactic","status":"publish","type":"post","link":"https:\/\/www.uri.edu\/news\/2012\/08\/uri-researcher-deep-sea-squid-can-jettison-its-arms-as-defensive-tactic\/","title":{"rendered":"溏心vlog免费B站 researcher: Deep-sea squid can \u2018jettison its arms\u2019 as defensive tactic"},"content":{"rendered":"<div class=\"press-release-import\">\n\t\tKINGSTON, R.I. \u2013 August 3, 2012 \u2013 A postdoctoral researcher at the 溏心vlog免费B站 has observed a never-before-seen defensive strategy used by a small species of deep-sea squid in which the animal counter-attacks a predator and then leaves the tips of its arms attached to the predator as a distraction.<\/p>\n<p><iframe loading=\"lazy\" width=\"420\" height=\"315\" src=\"http:\/\/www.youtube.com\/embed\/-SxLl6Sj6s0\" frameborder=\"0\" allowfullscreen=\"\"\/><\/p>\n<p>&#13;<br \/>\nStephanie Bush said that when the foot-long octopus squid (Octopoteuthis deletron) found deep in the northeast Pacific Ocean \u201cjettisons its arms\u201d in self-defense, the bioluminescent tips continue to twitch and glow, creating a diversion that enables the squid to escape from predators.<\/p>\n<p>&#13;<br \/>\n\t\u201cIf a predator is trying to attack them, they may dig the hooks on their arms into the predator\u2019s skin. Then the squid jets away and leaves its arm tips stuck to the predator,\u201d explained Bush. \u201cThe wriggling, bioluminescing arms might give the predator pause enough to allow the squid to get away.\u201d<\/p>\n<p>&#13;<br \/>\n\tThe discovery was published in the July issue of the journal Marine Ecology Progress Series.<\/p>\n<p>&#13;<br \/>\n\tWhile Bush was a graduate researcher working with the Midwater Ecology Lab at the Monterey Bay Aquarium Research Institute, she observed that many octopus squid had arms of different lengths.  Scientists had speculated that they may release their arms, just as lizards can release their tails when attacked, but no one had seen it happen.  Using a remotely operated vehicle in the Monterey Bay Submarine Canyon off the coast of California, Bush poked at a squid with a bottlebrush.<\/p>\n<p>&#13;<br \/>\n\t\u201cThe very first time we tried it, the squid spread its arms wide and it was lighting up like fireworks,\u201d she said.  \u201cIt then came forward and grabbed the bottlebrush and jetted backwards, leaving two arms on the bottlebrush.  We think the hooks on its arms latched onto the bristles of the brush, and that was enough for the arms to just pop off.\u201d<\/p>\n<p>&#13;<br \/>\n\tThe squid are able to re-grow their missing arms.<\/p>\n<p>&#13;<br \/>\n\t\u201cThere is definitely an energy cost associated with this behavior, but the cost is less than being dead,\u201d Bush said.<\/p>\n<p>&#13;<br \/>\n\tIn further experiments, Bush found that some octopus squid appeared hesitant to sacrifice their limbs, but some did so after being prodded several times.  When she provoked seven other squid species similarly, none dropped their arm tips.<\/p>\n<p>&#13;<br \/>\n\tBush\u2019s research on squid began in 2003 when she decided to investigate the assumptions that some scientists had made about deep-sea animals.<\/p>\n<p>&#13;<br \/>\n\t\u201cScientists had assumed that squid living in the deep-sea would not release ink as a defensive measure, but all the species I\u2019ve observed did release ink,\u201d she said. \u201cThey assumed that because they\u2019re in the dark all day every day that they\u2019re not doing the same things that shallow water squids are doing. They also assumed that deep-sea squid don\u2019t change color because of the dark, but they do.\u201d<\/p>\n<p>&#13;<br \/>\n\tThe 溏心vlog免费B站 scientist\u2019s current research focuses on a tiny squid that lives in the Gulf of California that migrates every day from the dark depths where there is little oxygen to the surface waters to feed.  She is examining their oxygen consumption rates and how increasing water temperatures will affect their survival.<\/p>\n<p>&#13;<br \/>\n\t\u201cThey\u2019re a really abundant species in the Gulf, so presumably if they are that abundant, they must be feeding on lots of different things and there must be lots of things feeding on them,\u201d Bush said.  \u201cThey could be very important to the health of the ecosystem.\u201d<\/div>\n","protected":false},"excerpt":{"rendered":"<p>KINGSTON, R.I. \u2013 August 3, 2012 \u2013 A postdoctoral researcher at the 溏心vlog免费B站 has observed a never-before-seen defensive strategy used by a small species of deep-sea squid in which the animal counter-attacks a predator and then leaves the tips of its arms attached to the predator as a distraction. &#13; Stephanie Bush [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"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-60275","post","type-post","status-publish","format-standard","hentry","category-archives"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/60275","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=60275"}],"version-history":[{"count":0,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/60275\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/media?parent=60275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/categories?post=60275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/tags?post=60275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}