{"id":134552,"date":"2024-12-08T01:59:10","date_gmt":"2024-12-07T18:59:10","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=134552"},"modified":"2024-12-08T01:59:10","modified_gmt":"2024-12-07T18:59:10","slug":"l-a-mountain-lions-become-more-nocturnal-to-avoid-people-study-finds","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=134552","title":{"rendered":"L.A. mountain lions become more nocturnal to avoid people, study finds"},"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 data-element=\"story-body\" data-subscriber-content=\"\">\n<p>Griffith Park\u2019s late celebrity mountain lion <a class=\"link\" href=\"https:\/\/www.latimes.com\/california\/story\/2022-12-14\/p-22-mountain-lion-2022-los-angeles-griffith-park\">P-22<\/a> took the night shift to avoid hordes of hikers, bikers and dawdlers who frequented his home in the heart of Los Angeles \u2014 and it\u2019s a pattern replicated by other pumas in the region, according to a new study. <\/p>\n<p>The move to a later schedule is an encouraging example of a species doing its part to coexist in a bustling megalopolis, according to researchers from UC Davis and other institutions who conducted the study. <\/p>\n<p>But the temporal gymnastics they perform may come at a cost, experts said, consuming energy and limiting the amount of time they can spend on critical tasks such as hunting. And it may compound other urban stressors, like <a class=\"link\" href=\"https:\/\/www.latimes.com\/environment\/story\/2023-02-02\/cars-are-killing-mountain-lions-faster-than-they-can-breed\">whizzing traffic<\/a> and <a class=\"link\" href=\"https:\/\/www.latimes.com\/environment\/story\/2024-10-01\/california-enacts-unprecedented-ban-on-rat-poisons\">rat poison<\/a>. <\/p>\n<p>The <a class=\"link\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0006320724003744?ref=pdf_download&amp;fr=RR-2&amp;rr=8ebe9f935ff72ac8\" target=\"_blank\" rel=\"noopener\">study<\/a>, published last month in the journal Biological Conservation, found that Southland mountain lions became more nocturnal and less crepuscular \u2014 i.e., active at dusk or dawn \u2014 in popular recreation areas.<\/p>\n<p>To examine the impact of recreation on the lions, researchers used GPS and activity data gleaned from the tracking collars of 22 mountain lions roaming the Santa Monica Mountains and surrounding region between 2011 and 2018. <\/p>\n<p>They also drew data from <a class=\"link\" href=\"https:\/\/www.strava.com\/get-started?utm_source=google&amp;utm_medium=cpc&amp;utm_campaign=&amp;utm_term=strava&amp;utm_content=Brand_Universal&amp;gad_source=1&amp;gclid=Cj0KCQiAu8W6BhC-ARIsACEQoDDCeYsaq-ase05S5vtJNKek5lzxXGQY30B1PJRFR_hJOcwUutSOX-8aAtryEALw_wcB\" target=\"_blank\" rel=\"noopener\">Strava<\/a>, a popular app in which users publicly document runs, hikes and more to determine how much recreation was happening in each lion\u2019s home range, and to test how it influenced the patterns and timing of their activity. <\/p>\n<p>The \u201cmost nocturnal\u201d puma in the study was the late <a class=\"link\" href=\"https:\/\/www.nps.gov\/articles\/000\/puma-profiles-p-41.htm\" target=\"_blank\" rel=\"noopener\">P-41<\/a>, who inhabited the Verdugo Mountains, a range bounded by freeways and development on the northeast edge of the San Fernando Valley, and a recreation haven. Ranked second was <a class=\"link\" href=\"https:\/\/www.nps.gov\/articles\/000\/puma-profiles-p-22.htm\" target=\"_blank\" rel=\"noopener\">P-22<\/a>, affectionately called the <a class=\"link\" href=\"https:\/\/www.latimes.com\/california\/story\/2022-04-21\/whats-next-for-p-22-mountain-lion-los-angeles\">Brad Pitt of mountain lions<\/a> when he stalked the Hollywood Hills. <\/p>\n<div class=\"enhancement\" data-click=\"enhancement\" data-align-center=\"\">\n<figure class=\"figure\"> <picture><source type=\"image\/webp\" srcset=\"https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/d20d804\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/320x213!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 320w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/00300d5\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/568x379!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 568w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/b5aadd3\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/768x512!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 768w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/651c471\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1080x720!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1080w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/6d18ce1\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1240x826!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1240w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/1c33b14\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1440x960!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1440w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/a3da352\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/2160x1440!\/format\/webp\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 2160w\" sizes=\"100vw\"\/><img class=\"image\" alt=\"A den of mountain lion kittens found in 2020 in the Santa Monica Mountains. \" srcset=\"https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/640b363\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/320x213!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 320w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/c7d619a\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/568x379!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 568w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/d6b448e\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/768x512!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 768w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/d27cba1\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1080x720!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1080w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/203a963\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1240x826!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1240w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/76582e8\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/1440x960!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 1440w,https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/c65caf8\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/2160x1440!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115 2160w\" sizes=\"auto, 100vw\" width=\"2000\" height=\"1333\" src=\"https:\/\/ca-times.brightspotcdn.com\/dims4\/default\/f8b5872\/2147483647\/strip\/true\/crop\/5184x3456+0+0\/resize\/2000x1333!\/quality\/75\/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F21%2F3d%2F98d5027d2b99676444a41bbc0b69%2Fb1e6a8344f414d0d9197ebbfd3699115\" decoding=\"async\" loading=\"lazy\"\/>   <\/picture>\n<div class=\"figure-content\">\n<p>The study revealed that female lions were less nocturnal than males, possibly because males pose a threat to them and their kittens. <\/p>\n<p>(National Park Service via Associated Press)<\/p>\n<\/p><\/div>\n<\/figure><\/div>\n<p>Researchers wondered if mountain lions who were exposed to more recreation would become immune to it \u2014 and simply not care. <\/p>\n<p>\u201cWe saw the opposite,\u201d said Ellie Bolas, lead author and a PhD candidate at UC Davis. <\/p>\n<p>\u201cSeeing that mountain lions are flexible in their activity and sensitive to recreation is, I think, a reason we can feel optimistic that they\u2019re willing to avoid us and want to avoid us,\u201d she added. <\/p>\n<p>Other institutions involved included Cal Poly Pomona, the National Park Service, UCLA, the University of Nebraska and Harvard Westlake High School. <\/p>\n<p>The findings are good news for Angelenos worried about becoming a lion\u2019s lunch \u2014 given that the cats are steering clear of people. And it helps explain how the apex predators manage to hack it in an intensely urban environment. Los Angeles is just one of two megacities in the world that are  home to a big cat; the other is Mumbai, in India, where leopards <a class=\"link\" href=\"https:\/\/theethicalist.com\/king-urban-jungle-protecting-leopards-of-mumbai\/#:~:text=A%20megacity%20with%20a%20population,of%20Maharashtra%2C%20for%20decades%20now.\" target=\"_blank\" rel=\"noopener\"><u>prowl the streets<\/u><\/a>. <\/p>\n<p>So why are local lions rearranging their schedules for people? The new study notes that animals might high-tail it to areas where there are less people when they can. But in the greater L.A. metropolitan area, with more than 18 million people, even natural areas get gridlocked. So they adopted another strategy. <\/p>\n<p>The National Park Service <a class=\"link\" href=\"https:\/\/www.nps.gov\/samo\/learn\/nature\/pumapage.htm\" target=\"_blank\" rel=\"noopener\">has monitored lions<\/a> in and around the Santa Monica Mountains for more than 20 years, which is where the long-term data for the recent research came from. <\/p>\n<p>\u201cA major thing that we\u2019ve been studying all along is the effects of urbanization and fragmentation on  these animals,\u201d said Seth Riley, study co-author and branch chief for wildlife at  Santa Monica Mountains National Recreation Area, a unit of the park service.<\/p>\n<p>The new study revealed that the lions\u2019 timing shifts weren\u2019t more pronounced on weekends when recreation spikes, contrary to what researchers expected.<\/p>\n<p>There were also differences between the sexes, with female mountain lions found to be more active during the day and closer to sunrise. Researchers surmised that they avoid overlapping with male lions who will kill kittens in tow \u2014 and sometimes even the females themselves.<\/p>\n<p>The least nocturnal puma tracked was <a class=\"link\" href=\"https:\/\/www.nps.gov\/articles\/000\/puma-profiles-p-13.htm\" target=\"_blank\" rel=\"noopener\">P-13<\/a>, a female with a home range in the central and western Santa Monicas. <\/p>\n<p>Beth Pratt, California regional executive director for the National Wildlife Federation, said that while it\u2019s good news that the charismatic cats are \u201ccoping,\u201d there are likely tradeoffs.<\/p>\n<p>\u201cBy switching their hunting strategy, it\u2019s not ideal,\u201d said Pratt, who was one of P-22\u2019s biggest boosters. \u201cIt takes more energy, it doesn\u2019t give them as many options, but the animals here are doing their part.\u201d <\/p>\n<p>People should pitch in, too, by minimizing challenges, she said. Panthers stalking the Santa Monica Mountains are imperiled by inbreeding because of  freeways that essentially lock them in \u2014 and visitors with needed genetic diversity out. <\/p>\n<p>\u201cAt a certain point they\u2019re not going to be able to cope with all these challenges stacked up,\u201d she said, pointing to threats such as cars and rodenticides \u2014 both of which took a toll on P-22. He was <a class=\"link\" href=\"https:\/\/www.latimes.com\/california\/story\/2022-12-17\/why-officials-euthanized-ailing-mountain-lion-p22\">captured and euthanized<\/a> in late 2022, deemed too sick to return to the wild because of injuries and infection. <\/p>\n<p>One way to give lions \u201cthe edge\u201d is by putting up wildlife crossings, said Pratt, who is <a class=\"link\" href=\"https:\/\/www.latimes.com\/environment\/story\/2021-12-11\/beth-pratt-raised-millions-for-a-cougar-overpass\">a major force<\/a> behind the largest such passageway in the world <a class=\"link\" href=\"https:\/\/www.latimes.com\/lifestyle\/story\/2024-10-29\/agoura-hills-wildlife-crossing-101-freeway-native-shrubs-wildflowers-to-come\">rising over the 101 Freeway<\/a> in Agoura Hills.<\/p>\n<p>The more than $90-million <a class=\"link\" href=\"https:\/\/101wildlifecrossing.org\/\" target=\"_blank\" rel=\"noopener\">Wallis Annenberg Wildlife Crossing<\/a> currently under construction is seen as a potential lifeline for the lions of the Santa Monicas. Without an outlet, the population is <a class=\"link\" href=\"https:\/\/www.latimes.com\/local\/california\/la-me-ln-mountain-lion-extinction-shuttle-service-20190320-story.html\">at risk of blinking ou<\/a>t.<\/p>\n<p>Pratt said the new study shows that actions as seemingly innocuous as how we site  trails and enjoy the outdoors can impact the species \u2014 and that it would behoove us to consider our approach as we navigate a biodiversity crisis.<\/p>\n<p>\u201cIt\u2019s not that we shouldn\u2019t do them, but how can we do them differently so that animals aren\u2019t as impacted,\u201d she said.<\/p>\n<p>Bolas said there\u2019s currently no research to tell us if the lions\u2019 flexibility in the timing of their activity is also a cost to them, but that \u201cit very well may be.\u201d<\/p>\n<p>Revelations from the study arrive as some Southern California and Central Coast cougars are at a crossroads.<\/p>\n<p>California wildlife officials are poised to decide whether to designate six isolated clans of pumas as endangered or threatened species under state law. <\/p>\n<p>The state Fish and Game Commission in 2020 granted the cougars who are roaming regions between Santa Cruz and the U.S.-Mexico border <a class=\"link\" href=\"https:\/\/www.latimes.com\/environment\/story\/2020-04-16\/state-panel-studying-threatened-species-protection-for-southern-california-cougars\">temporary endangered status<\/a> as a candidate to be listed under the state Endangered Species Act. <\/p>\n<p>A final decision is expected next year.<\/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.latimes.com\/environment\/story\/2024-12-07\/mountain-lion-southern-california-uc-davis-study\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Griffith Park\u2019s late celebrity mountain lion P-22 took the night shift to avoid hordes of hikers, bikers and dawdlers who frequented his home in the heart of Los Angeles \u2014 &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=134552\" 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-134552","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/134552","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=134552"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/134552\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}