{"id":162900,"date":"2020-06-28T18:51:58","date_gmt":"2020-06-28T16:51:58","guid":{"rendered":"https:\/\/www.myza.co.za\/getting-closer-to-a-much-better-count-of-africas-lions-the-conversation\/"},"modified":"2020-06-28T18:51:58","modified_gmt":"2020-06-28T16:51:58","slug":"getting-closer-to-a-much-better-count-of-africas-lions-the-conversation","status":"publish","type":"post","link":"https:\/\/www.myza.co.za\/press\/getting-closer-to-a-much-better-count-of-africas-lions-the-conversation\/","title":{"rendered":"Getting closer to a much better count of Africa’s lions | The Conversation"},"content":{"rendered":"

Getting closer to a much better count of Africa’s lions<\/a>: <\/p>\n

A young lion cub rests in the branches of a large euphorbia tree in Uganda's Queen Elizabeth Conservation Area. <\/span> Alex Braczkowski<\/span>, Author provided<\/span><\/span><\/figcaption><\/figure>\n

African lions are one of the world\u2019s favourite animals. But their numbers have been shrinking over the past century, especially over the past 30 years. Some scientists estimate that their numbers have halved since 1994.<\/p>\n

Estimates of the total population of Africa\u2019s king of beasts vary, but a recent CITES report suggested that only about 25,000 remain in the wild, across 102 populations in Africa. But the numbers in this report aren\u2019t particularly reliable. Most used traditional survey approaches \u2013 like counts of lion footprints, audio lure surveys or expert opinion – and many were not peer-reviewed.<\/p>\n

These traditional methods of counting lions produce highly uncertain estimates. A count of lions using their footprints may give you an estimate of, say, 50 lions in an area. But the uncertainty around this estimate could be between 15 and 100 individuals. This large uncertainty makes tracking how lion populations change from year to year nearly impossible. Our recent review shows that the majority of methods used to count African and Asiatic lions use these less robust methods.<\/p>\n

\"\"
Two young lions rest in the branches of a Euphorbia tree on the Kasenyi Plains of Queen Elizabeth National Park.<\/span> Alex Braczkowski<\/span><\/span> <\/figcaption><\/figure>\n

Making sure that lion numbers are accurate and reasonably precise is key for the species\u2019 conservation. Estimates of lion numbers underpin their classification as \u2018vulnerable\u2019. They also form the backbone for controversial management practices like the setting of trophy hunting quotas.<\/p>\n

The good news is that better ways of counting lions are being developed. So called spatially explicit capture-recapture methods are useful for conservation because they tell us not only how many animals live in an area, but how they move in a landscape, what their sex ratios are and even where their highest numbers are located. This method has been used to count tigers, leopards, jaguars and mountain lions for over a decade but it is only now becoming popular for lions. <\/p>\n

\"\"
A review of 169 peer-reviewed scientific articles (Web of Science and Google Scholar) showed many lion abundance and density estimates rely on traditional methods like audio lure or track surveys.<\/span> <\/figcaption><\/figure>\n

Spatially explicit capture-recapture methods use a mathematical model which incorporates the individual identity of animals (usually from photographs of natural body markings, spot patterns or even whisker spots) and their location in a landscape. By identifying and \u201cmarking\u201d individuals over a period of time an estimate can be made of the total number of animals that live in an area. <\/p>\n

Better methods from East Africa<\/h2>\n

This method was first used to count lions in a 2014 study in Kenya\u2019s Maasai Mara. The lead authors capitalised on a historic way of identifying lions: their whiskers. Every lion in the wild has a unique whisker spot pattern, very much like a human fingerprint. <\/p>\n

Recently, some of us applied this technique in a count of African lions in southwestern Uganda, in a region known as the Queen Elizabeth Conservation Area. These lions are interesting because they have a rare culture of tree-climbing. This means they have great local tourism value as each lion raises about USD$ 14 000 annually in park fees. <\/p>\n

The status of lions in Uganda was not previously very well understood. After a wave of intense poaching during the unstable Idi Amin and Milton Obote regimes – 1971 to 1985 – during which time wildlife numbers plummeted. <\/p>\n

But recent aerial surveys and radio-collaring studies suggested that lion prey numbers were recovering. A radio collaring study of lions from 2006 to 2010 also showed that lion home range sizes were small, and because range size is predicted by abundant prey, this suggested lions here were in good health.<\/p>\n

Uganda\u2019s lions in peril<\/h2>\n

From October 2017 to February 2018 we drove more than 8 000 km in 93 days searching for lions in the Queen Elizabeth Conservation Area. We obtained 165 lion detections. Using individual identifications from photos, we calculated that on average one could expect to find about 3 individual lions per 100 square kilometres, with a total of 71 lions in the entire area. <\/p>\n

\"\"
Scientists during a census of the lions in Uganda\u2019s Queen Elizabeth Conservation Area.<\/span> Steve Winter<\/span><\/span> <\/figcaption><\/figure>\n

We used the spatially explicit capture-recapture method to assess how lion movements had changed from the home range study performed a decade earlier. Worryingly, our results showed that lions had increased their ranges significantly in just 10 years – above 400% for male lions and above 100% for females. <\/p>\n

Also, there was only one female for every male in the wild. This is very different to other African lion populations which have a much higher proportion of females relative to males (about two females for every male). <\/p>\n

Next steps<\/h2>\n

From the standpoint of lion conservation and recovery these results are concerning. But, on a positive note, this finding has provided a timely alert. And we recommend the use of this relatively novel survey methodology to assess other lion populations across Africa.<\/p>\n

\"\"
Four young lion cubs trigger a camera trap set on a waterbuck kill on Queen Elizabeth\u2019s Kasenyi Plains.<\/span> Alex Braczkowski<\/span><\/span> <\/figcaption><\/figure>\n

More recently, in 2020, another rigorous study at Lake Nakuru National Park, Kenya, applied this approach and found that this method estimated lion population size to be about a sixth of what was previously thought. The Kenya Wildlife Service, in collaboration with local partners is now using spatially explicit capture-recapture in an ambitious nationwide survey of lions and other large carnivores at all potential strongholds across Kenya.<\/p>\n

More broadly, these results further bolster the view that by relying on ad hoc, indirect methods to detect lion population trends, we may end up with misleading answers and fail to direct scarce conservation resources optimally. <\/p>\n

We argue that all stakeholders involved in lion conservation across Africa and Asia should use rigorous survey methods to keep track of lion populations. These results should then form appropriate baselines for continent-wide reports on lion abundance, and help inform strategies aimed at their recovery.<\/p>\n

\"The <\/p>\n

Alexander Richard Braczkowski received funding from National Geographic Society, the Scientific Exploration Society, a Rufford Small grant, the School of Earth and Environmental Sciences and the Siemiatkowski Foundation for the lion census work. <\/span><\/em><\/p>\n

Duan Biggs receives funding from the Australian Research Council and the Luc Hoffmann Institute<\/span><\/em><\/p>\n

Martine Maron receives funding from The Australian Research Council, the Science for Nature and People Partnership, and the Australian Government's National Environmental Science Program. She is President of BirdLife Australia, a Governor of WWF-Australia, and a member of the Alliance of Leading Environmental Researchers and Thinkers and the Wentworth Group of Concerned Scientists.<\/span><\/em><\/p>\n

James R. Allan does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.<\/span><\/em><\/p>\n

Source:<\/strong> The Conversation \u2013 Articles (AFRICA)<\/a><\/small>
\n<\/p>\n

Read more on The Conversation<\/a>.<\/p>\n

Join the fun:<\/strong> Add Your event<\/a> | Submit a Press Release<\/a> | Add your listing<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Getting closer to a much better count of Africa’s lions: A young lion cub rests in the branches of a large euphorbia tree in Uganda's Queen Elizabeth Conservation Area. Alex Braczkowski, Author provided African lions are one of the world\u2019s favourite animals. But their numbers have been shrinking over the past century, especially over the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","ngg_post_thumbnail":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4584],"tags":[4635,4328,4582,8890,20085,2481,1359,8689],"class_list":{"0":"post-162900","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-africa-news-2","7":"tag-africas","8":"tag-better","9":"tag-closer","10":"tag-conversation","11":"tag-count","12":"tag-getting","13":"tag-lions","14":"tag-much","15":"entry"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/posts\/162900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/comments?post=162900"}],"version-history":[{"count":0,"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/posts\/162900\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/media?parent=162900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/categories?post=162900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.myza.co.za\/press\/wp-json\/wp\/v2\/tags?post=162900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}