{"id":122455,"date":"2024-11-05T20:33:20","date_gmt":"2024-11-05T13:33:20","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=122455"},"modified":"2024-11-05T20:33:20","modified_gmt":"2024-11-05T13:33:20","slug":"the-us-navy-put-cameras-on-dolphins-and-the-results-were-wild-sciencealert","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=122455","title":{"rendered":"The US Navy Put Cameras on Dolphins And The Results Were Wild : ScienceAlert"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<\/p>\n<div>\n<p>A buzz of clicks and gleeful victory squeals compose the soundtrack in the first footage ever recorded from the perspective of dolphins freely hunting off the coast of North America.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>For a scientific study published in 2022, the US Navy strapped cameras to <a href=\"https:\/\/www.niwcpacific.navy.mil\/About\/Departments\/Intelligence-Surveillance-and-Reconnaissance\/Marine-Mammal-Program\/\">dolphins, which are trained<\/a> to help identify undersea mines and protect some of America&#8217;s <a href=\"https:\/\/www.military.com\/history\/militarized-dolphins-protect-almost-quarter-of-us-nuclear-stockpile.html\">nuclear stockpile<\/a>, then gave them free rein to hunt in San Diego Bay.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The <a href=\"https:\/\/www.sciencealert.com\/clever-dolphins-can-pick-up-fishing-tricks-from-their-friends\">clever marine mammals<\/a> did not disappoint, offering up exciting chases and even targeting venomous sea snakes to the surprise of the researchers.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>For such popular, well-known animals, there are still so many basic things we don&#8217;t yet know about these <a href=\"https:\/\/www.sciencealert.com\/male-dolphins-use-their-individual-names-to-build-complex-social-networks\">highly social<\/a> and <a href=\"https:\/\/www.sciencealert.com\/scientists-discover-dolphins-taste-friends-pee-to-check-if-they-re-around\">often<\/a> <a href=\"https:\/\/gizmodo.com\/this-is-a-video-of-a-dolphin-masturbating-with-a-decapi-1463711897\">gross<\/a> cetaceans, like precisely how they typically feed.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>Researchers broadly know of at least two techniques: slurping up prey like noodles from a bowl, and ramming them down like a hot dog between rides at a state fair.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>But the footage revealed a whole lot more.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The cameras, strapped to six bottlenose dolphins (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Common_bottlenose_dolphin\"><em>Tursiops truncatus<\/em><\/a>) from the US National Marine Mammal Foundation (NMMF), recorded six months of footage and audio \u2013 providing us with a new level of insight into these mammals&#8217; hunting strategies and communications.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The recording equipment was placed on their backs or sides, displaying disturbingly odd angles of their eyes and mouths.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>While these dolphins aren&#8217;t wild, they are provided with regular opportunities to hunt in the open ocean, complementing their usual diet of frozen fish. So it is likely these animals use similar methods to their wild brethren, as NMMF marine mammal veterinarian Sam Ridgway and colleagues explained in 2022.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;As dolphins hunted, they clicked almost constantly at intervals of 20 to 50 milliseconds,&#8221; they <a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0265382\">report<\/a> in their paper.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;On approaching prey, click intervals shorten into a terminal buzz and then a squeal. On contact with fish, buzzing and squealing was almost constant until after the fish was swallowed.&#8221;<\/p>\n<p><iframe loading=\"lazy\" title=\"Dolphins Hunting With Camera Strapped To Them\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/EQ8YJgWotsg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe> frameborder=&#8221;0\u2033 allow=&#8221;accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share&#8221; referrerpolicy=&#8221;strict-origin-when-cross-origin&#8221; allowfullscreen&gt;<\/iframe><\/p>\n<p>The camera-strapped dolphins caught more than 200 fish, including bass, croakers, halibut, smelt and pipefish. The smelt often flung themselves into the air in desperate attempts to escape the skilful predators.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>But the dolphins tracked their every move, swimming upside down to give their swiveling eyes a clear view \u2013 a technique also observed previously in wild dolphins.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;These dolphins appeared to use both sight and sound to find prey,&#8221; Ridgway and colleagues <a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0265382\">explained<\/a>. &#8220;At distance, the dolphins always used echolocation to find fish. Up close, vision and echolocation appeared to be used together.&#8221;<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The cameras also recorded the sound of the animals&#8217; hearts as they pumped hard to keep up with the strenuous activities, and revealed that rather than ramming their victims down, the dolphins instead used suction to help gulp down their still struggling prey with impressively strong throat muscles.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The dolphins mostly sucked fish in from the sides of their open mouths, throat muscles expanded and tongue withdrawn out of the way. The expanded inner mouth space helps create negative pressure that their sucking muscles add to.<\/p>\n<figure id=\"attachment_73767\" aria-describedby=\"caption-attachment-73767\" style=\"width: 642px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-642x876.png\" alt=\"Image showing a camera strapped onto the side of a dolphin and two views of dolphins capturing prey\" width=\"642\" height=\"876\" class=\"size-medium wp-image-73767\" srcset=\"https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-642x876.png 642w, https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-304x415.png 304w, https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-768x1048.png 768w, https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-1126x1536.png 1126w, https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras-600x818.png 600w, https:\/\/www.sciencealert.com\/images\/2022\/08\/DolphinWithCameraAndTwoViewsFromCameras.png 1500w\" sizes=\"auto, (max-width: 642px) 100vw, 642px\" loading=\"lazy\"\/><figcaption id=\"caption-attachment-73767\" class=\"wp-caption-text\">The camera set-up and dolphins in action. (<a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0265382\">Ridgway et al., <em>PLOS ONE<\/em>, 2022<\/a>)<\/figcaption><\/figure>\n<p>While dolphins have been caught messing around with snakes before, including river dolphins playing with <a href=\"https:\/\/www.sciencealert.com\/scientists-observe-dolphins-swimming-with-anacondas-in-their-mouths-and-what-the-heck\">an absurdly large anaconda<\/a>, the footage confirmed for the first time that they may also eat these reptiles too.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>One dolphin consumed eight highly venomous yellow-bellied sea snakes (<em><a href=\"https:\/\/en.wikipedia.org\/wiki\/Yellow-bellied_sea_snake\">Hydrophis platurus<\/a><\/em>).<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;Our dolphin displayed no signs of illness after consuming the small snakes,&#8221; the researchers <a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0265382\">explained<\/a>, but they acknowledged this could also be unusual behavior since the dolphins are captive animals.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;Perhaps the dolphin&#8217;s lack of experience in feeding with dolphin groups in the wild led to the consumption of this outlier prey.&#8221;<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>The lead author of the study, Sam Ridgway, passed away at age 86, shortly before the study was published, leaving behind a rich legacy of research.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;His creative approach to partnering with Navy dolphins to better understand the species&#8217; behavior, anatomy, health, sonar, and communication will continue to educate and inspire future scientists for generations,&#8221; NMMF ethologist Brittany Jones <a href=\"https:\/\/www.theguardian.com\/environment\/2022\/aug\/17\/mine-hunting-dolphins-filmed-hunting-and-eating-venomous-sea-snakes\">told<\/a> <em>The Guardian<\/em>.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>As for the Navy-trained dolphins, they &#8220;work in open water almost every day&#8221;, NMMF <a href=\"https:\/\/navalunderseamuseum.org\/marinemammals4\/\">explains on their website<\/a>.<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>&#8220;They can swim away if they choose, and over the years a few have. But almost all stay.&#8221;<\/p>\n<p><!-- START single\/mrec --><br \/>\n<!-- END single\/mrec --><\/p>\n<p>This research was published in <a href=\"https:\/\/doi.org\/10.1371\/journal.pone.0265382\"><em>PLOS ONE<\/em><\/a>.<\/p>\n<p><em>An earlier version of this article was published in August 2022.<\/em><\/p>\n<\/p><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<br \/><div data-type=\"_mgwidget\" data-widget-id=\"1660802\">\r\n<\/div>\r\n<script>(function(w,q){w[q]=w[q]||[];w[q].push([\"_mgc.load\"])})(window,\"_mgq\");\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/www.sciencealert.com\/the-us-navy-put-cameras-on-dolphins-and-the-results-were-wild\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A buzz of clicks and gleeful victory squeals compose the soundtrack in the first footage ever recorded from the perspective of dolphins freely hunting off the coast of North America. &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=122455\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8628],"tags":[],"class_list":["post-122455","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/122455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=122455"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/122455\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=122455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=122455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=122455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}