LEOPARD'S VS HYENAS

Spotted apex predator being pressured by spotted pack hunters – and it's our fault

UNIVERSITY OF COPENHAGEN - FACULTY OF SCIENCE

 

IMAGE: 

IMAGES FROM CAMERA TRAPS IN UDZUNGWA. FROM THE LEFT: FEMALE LEOPARD, HYENA, MALE LEOPARD

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CREDIT: RASMUS W. HAVMØLLER

Who’s stronger? A solitary leopard or cackle of hyenas? And which is best at getting along with humans?

University of Copenhagen researchers closely studied this in a large East African natural area surrounded by rural settlements. The study demonstrates that the presence of humans has a direct impact on the competitive relationship between the two large predator species: leopards (Panthera pardus) – the iconic spotted feline and the spotted hyena (Crocuta crocuta) – a kleptoparasite and pack hunter known for its comical appearance and characteristic 'laugh'.

"We humans continue eating our way into the little bit of wilderness left in the world. As we do, we impact wildlife. This study demonstrates that human disturbance upsets the balance between competing species and that this advantages hyenas," says Rasmus W. Havmøller, the study’s first author and a postdoc at the University of Copenhagen’s Natural History Museum of Denmark.

For months, Havmøller have been using camera traps to observe the dynamics between hyenas and leopards living in Tanzania’s Udzungwa Mountains – an approximately 2,000 km2 national park that is completely surrounded by agricultural and populated areas. The study is the first to combine camera observations of large predators over both time and space in a single analysis.

While the hyena as a species seems to be increasing in numbers, the population of leopards has been in significant decline for decades, both in Africa and worldwide. Since hyenas are the leopards' only competitor in this particular natural area, the ability of the two species to coexist is important for their survival. And here, the local population is an important factor:

"As the local people definitely don’t' like leopards, the leopards retreat as far away from humans as possible. Hyenas, on the other hand, benefit from the fact that humans don’t feel threatened by or pursue them. Consequently, hyenas live in close to human populations and may even exploit humans as shields against the leopards," says Havmøller.

"But the areas nearest to humans are also the areas with the most prey. And as hyenas assert dominance over these areas, it increases their ability to outcompete leopards and potentially threaten the leopard's adaptability," adds Havmøller.

Size matters

The researchers' observations confirm that size matters. While male leopards, which are larger, retain their dominance over hyenas, the situation is different for female leopards, which are smaller.

"Even though the male leopards are the ones in charge, the hyenas aren’t exactly scared off by them. They simply hang out in the background – probably to follow the leopards and steal their prey. But the physical inferiority of the hyenas seems to be compensated for in the areas closest to humans, because male leopards pull out," says Rasmus W. Havmøller, who continues:

"Female leopards, on the other hand, completely change their behavior when hyenas are in the area. They become diurnal, whereas hyenas are primarily nocturnal. This is probably because female leopards are smaller than hyenas, and that they will likely lose in any fight over prey."

Overall, the study shows that the hyenas benefit from living near humans.

"This suggests that the hyena's ability to adapt to areas of human activity may strengthen their overall success as a species and their competitive advantage over other large predators as we humans disturb more and more nature," says Havmøller.

When leopards are pressured, cascade effects may follow

According to the researcher, the shift in female leopard hunting patterns may have negative consequences:

"If you open up for more tourism and build more roads in the national park, the female leopards will be pressured immediately. They aren’t able to differentiate between safari tourists – who are most active during the day – and poachers. In time, they will probably learn that safari guests aren’t dangerous. But if there is a large and rapid influx into the area, you will probably see a decline in their population," says Rasmus W. Havmøller.

If leopards are seriously pressured out of the food chain, one should expect the emergence of what are known as cascade effects in the ecosystem:

"Plucking a large predator like leopards out of a food chain, which can be the ultimate consequence of human disturbances, may have very violent effects. Populations of other species, such as certain monkeys, whose populations are kept in check by leopards, will suddenly become too large and change the balance of the entire ecosystem," says the researcher.

As such, Havmøller hopes that the study will serve to encourage restraint when it comes to managing wilderness areas.

"Our results clearly indicate that human disturbances can change the competitive relationship between important predators. So, I hope that considerations will be made when expanding activities in wilderness areas, so as to roll them out slowly and give animals a chance to adapt. Furthermore, it would be good if the effects of human disturbances were monitored in more places using camera traps," concludes Rasmus W. Havmøller.

 

 

HYENAS VS. LEOPARDS 

• Leopards are unpopular among local people in many places because they may hunt livestock and attack humans. Hyenas, on the other hand, "clean up" by eating sick or dead livestock and don’t pose a problem for humans.
• Female leopards (approx. 20-43 kg.) are about half the size of male leopards (approx. 51-72 kg). Hyenas are in the middle in terms of weight (approx. 48-56 kg).
• Leopards are solitary hunters, whereas hyenas hunt in large cackles (clans), which can be an advantage for hyenas in confrontations with leopards.
• Hyenas are kleptoparasites that regularly steal the prey of other carnivores – including leopards.
• Leopards on the other hand, are masterful tree-climbers, which allows them to protect their prey from hyenas.

 

ABOUT THE STUDY

• The researchers behind the study are: Rasmus W. Havmøller and Linnea W. Havmøller from the Natural History Museum of Denmark, University of Copenhagen; Arielle W. Parsons from Lincoln Park Zoo, USA and Roland Kays from North Carolina State University, USA.
• The study has been published in the scientific journal Ecosphere.
• The research is supported by the ERC under the EU’s Horizon 2020 programme.

  

Map of Udzungwa Mountains, Tanzania

CREDIT

(map from the scientific article)

JOURNAL

Ecosphere

DOI

10.1002/ecs2.4913 

ARTICLE TITLE

Sex and size matter: Intricate dominance relationships in an East African large carnivore guild

Hyenas die also in road accidents

What factors influence the risk of fatal collisions between vehicles and spotted hyenas in the Serengeti? Findings from a long-term study over three decades

Peer-Reviewed Publication

LEIBNIZ INSTITUTE FOR ZOO AND WILDLIFE RESEARCH (IZW)

 

IMAGE: TWO ADULT FEMALE SPOTTED HYENAS KILLED BY A CAR ON A MAIN GRAVEL ROAD IN THE SERENGETI NATIONAL PARK. view more 

CREDIT: SONJA METZGER/LEIBNIZ-IZW

The Serengeti in Tanzania is home to large populations of wildlife species, including spotted hyenas (Crocuta ocaliz). While many human activities are prohibited in the national park, driving is allowed in and through the protected area. Using a 34-year long-term data set, a scientific team from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) analysed which factors contribute significantly to hyenas being run over and killed by vehicles. The results of the analyses indicate that mainly two factors play a role: firstly, the characteristics of the road and secondly, the annual migration of the large ungulate herds in the Serengeti and the associated seasonal changes in the ocalization of the prey animals of the spotted hyenas. These findings provide new insights into which ecological and individual factors influence predators’ risk of fatal collisions with vehicles and were published in the scientific journal Biological Conservation.

 

Even in protected areas, many wild animals are killed by vehicles worldwide, and these negative impacts of roads continue to increase due to the rise of human populations on the borders of protected areas and the growing interest in wildlife tourism. However, the factors that contribute to fatal collisions between vehicles and wildlife are still poorly understood. 

As part of a long-term study in the Serengeti National Park, the Leibniz-IZW scientists found a total of 104 spotted hyenas that had been run over between 1989 and 2023. Based on these cases, they investigated the question of which spatial and temporal factors particularly contribute to spotted hyenas being run over and killed by vehicles, and whether spotted hyenas of one age group, sex or social status are particularly affected. Long-term studies of this kind are rare. The Serengeti is criss-crossed by a network of roads. The main roads are gravel roads used not only by tourist vehicles, scientists and park staff, but also by trucks, supply vehicles and national bus lines throughout the year. In addition, there are a large number of unpaved wildlife observation and camp access “tracks”.

Overall, two factors proved to be crucial. Firstly, hyenas were more often run over on main roads than on “tracks”, probably because there is more traffic on main roads and vehicles travel faster there. Secondly, the timing and location of fatal collisions varied with the seasonal migration of the large herds of ungulates (wildebeest, zebra and Thomson’s gazelles), which are the main prey of Serengeti spotted hyenas. The results are consistent with other studies showing that the risk of being killed by a vehicle increases with the mobility and distance travelled by the animals. In addition, killed hyenas were found particularly close to watercourses, human dwellings, to which the hyenas are presumably attracted by the presence of human food waste.

“Contrary to expectations, the seasonal variation in the number of tourists in the region did not seem to play a role in the level of mortality,” says Marwan Naciri, who joined the Leibniz-IZW for this project and is the lead author of the publication. 

A special feature of the dataset used in this study is that some of the hyenas that were run over were individually known and therefore factors of their life history could be included in the analysis. For example, the analyses show that adult females were most frequently run over, probably because they are the ones who regularly have to travel long distances between their den and migrating prey herds in order to be able to hunt on the one hand and nurse their cubs left at the den on the other.

“Injuries from illegally laid wire snares also particularly affect adult female hyenas, as we found in a previous study,” says Leibniz-IZW scientist Sarah Benhaiem, involved in both research projects. In summary, roadkills and death by snares could be one of the main causes of death for adult hyenas in the Serengeti.  It is still unclear whether this mortality, which mainly affects adult females, threatens the continued existence of the spotted hyena population in the Serengeti.

Road networks in the Serengenti are likely to expand in the coming decades, including in protected areas. Knowledge of the factors that contribute to fatal collisions between vehicles and wildlife, such as road characteristics, will help design effective mitigation measures, such as reducing the speed and number of vehicles on main roads. Good planning of road construction and implementation of mitigation measures will be essential to ensure wildlife conservation in protected areas.

Publication

Naciri M, Planillo A, Gicquel M, East ML, Hofer H, Metzger S, Benhaiem S (2023): Three decades of wildlife-vehicle collisions in a protected area: Main roads and long-distance commuting trips to migratory prey increase spotted hyena roadkills in the Serengeti. Biological Conservation 279, https://doi.org/10.1016/j.biocon.2023.109950.

 

Benhaiem S, Kaidatzi S, Hofer H, East ML (2023): Long-term reproductive costs of snare injuries in a keystone terrestrial by-catch species. Anim Conserv 26, 61-71. https://doi.org/10.1111/acv.12798.

Photo caption

Two adult female spotted hyenas killed by a car on a main gravel road in the Serengeti National Park. Photo: Sonja Metzger

Contacts

Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW)
in the Forschungsverbund Berlin e.V.
Alfred-Kowalke-Str. 17, 10315 Berlin

Dr. Sarah Benhaiem (German, English and French)
Scientist Dept. Ecological Dynamics 
Tel.: +49 30 5168-466
E-Mail: benhaiem@izw-berlin.de

Steven Seet (German, English)
Head Science Communication 
Tel.: +49 30 5168-125
E-Mail: seet@izw-berlin.de

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JOURNAL

Biological Conservation

DOI

10.1016/j.biocon.2023.109950 

ARTICLE TITLE

Three decades of wildlife-vehicle collisions in a protected area: Main roads and long-distance commuting trips to migratory prey increase spotted hyena roadkills in the Serengeti

 

Small birds spice up the already diverse diet of spotted hyenas in Namibia

LEIBNIZ INSTITUTE FOR ZOO AND WILDLIFE RESEARCH (IZW)

 

IMAGE: 

SPOTTED HYENA HUNTING BIRDS AT A WATERHOLE IN NAMIBIA

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CREDIT: PHOTO BY MIHA KROFEL

Hyenas are generalist predators (and scavengers) with a broad range of prey species. They are known for hunting (or scavenging) larger mammals such as antelopes and occasionally feed on smaller mammals and reptiles. Being flexible in the choice of prey is a strategy of generalists – and this even extends to small passerine birds, as scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) and the University of Ljubljana observed in Namibia: Spotted hyenas pursued red-billed queleas, picked them from the ground or the surface of a waterhole and swallowed them whole, at a success rate of approximately one bird every three minutes. These observations were described for the first time in word, photos and videos in the scientific journal “Food Webs”.

The diet breadth of hyenas is matched by few other carnivores. Spotted hyenas (Crocuta crocuta) are known to hunt a variety of larger mammals such as zebras and antelopes in southern and eastern Africa – but also ostriches, flamingos, reptiles, other carnivores. They also scavenge on carcasses from giraffes to elephants and cattle. Until now very few observations of hyenas feeding on small birds were reported. “In our paper we describe for the first time the hunting and feeding behaviour of spotted hyenas on red-billed queleas (Quelea quelea), a passerine bird known for its huge flocks, at a waterhole in the Etosha National Park in Namibia”, say Rubén Portas and Dr. Miha Krofel, scientists working for the Leibniz-IZW and the University of Ljubljana. On two different days they observed, filmed and photographed spotted hyenas chasing flying birds or picking them from the ground or the water surface, and devouring them whole at the waterhole. “We observed that a single hyena can catch on average one bird every three minutes”, the scientists conclude from their observations.

The scientists could draw some conclusions about the feeding behaviour of spotted hyenas from their observations. “It adds to the known variety of the spotted hyena diet and hunting tactics, since this behaviour has not been documented before”, says Portas. “It confirms their flexibility and ability to exploit foraging opportunities and obtaining food from unusual sources. We can also provide a first estimate on the capture rates and the food intake of hyenas hunting passerine birds.” As the observations were limited to a single waterhole, it is possible that the described foraging tactic was specific to the hyenas from the observed clan and occurred as an opportunistic response to an abundant food source, the authors say. Between May and August, thousands of wintering red-billed queleas gather at waterholes in Namibia.

Portas and Krofel regularly carry out field research on vultures, lions, leopards and hyenas and investigate carnivore-scavenger interactions and information transfer in the scavenger community for the GAIA Initiative and InterMuc projects in Etosha National Park. The GAIA Initiative is an alliance of research institutes, conservation organisations and companies with the aim of creating a high-tech early warning system for environmental changes. In several projects, the GAIA partners conduct wildlife research on selected species, their interaction and the functioning of ecosystems they inhabit. On this basis, the GAIA scientists and engineers build and utilize high-tech interfaces to the senses and intelligence of sentinel animals in order to detect critical changes or incidents in ecosystems fast and effectively. To this end, they develop a new generation of animal tags equipped with on-board artificial intelligence (AI), a camera, energy-efficient electronics and satellite-based communication technology.

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JOURNAL

Food Webs

DOI

10.1016/j.fooweb.2024.e00340 

METHOD OF RESEARCH

Observational study

SUBJECT OF RESEARCH

Animals

ARTICLE TITLE

Spotted hyena (Crocuta crocuta) predation on passerine birds in Namibia

When inequality is more than “skin-deep”: Social status leaves traces in the epigenome of spotted hyenas in Tanzania

LEIBNIZ INSTITUTE FOR ZOO AND WILDLIFE RESEARCH (IZW)

 

IMAGE: 

SPOTTED HYENAS RESTING AT THE COMMUNAL DEN IN THE SERENGETI NATIONAL PARK IN TANZANIA (PHOTO BY SARAH BENHAIEM/LEIBNIZ-IZW)

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CREDIT: PHOTO BY SARAH BENHAIEM/LEIBNIZ-IZW

A research consortium led by scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) provide evidence that social behaviour and social status are reflected at the molecular level of gene activation (epigenome) in juvenile and adult free-ranging spotted hyenas. They analysed non-invasively collected gut epithelium samples from both high-ranking and low-ranking female hyenas and showed that rank differences were associated with epigenetic signatures of social inequality, i.e., the pattern of activation or switching off of genes that regulate important physiological processes such as energy conversion and immune response in several genome regions. The results, published in the scientific journal Communications Biology, contribute to a better understanding of the role of epigenetic mechanisms in the interplay of social, environmental and physiological factors in the life of a highly social mammal.

In mammals, social behaviour and social status can substantially influence the survival, reproductive performance and health of individuals. However, it is not yet fully understood how the translation of social and environmental factors into the physiology of an organism is reflected in molecular processes. Now, scientists from the Leibniz-IZW Department of Evolutionary Genetics and the Serengeti Hyena Project at the Leibniz-IZW’s Department of Ecological Dynamics found that social status influenced epigenetic patterns, more specifically the methylation of DNA in both young and adult female spotted hyenas (Crocuta crocuta) which determines the activation of genes. They analysed DNA from gut epithelium cells from 18 adult female hyenas and 24 cubs with known social status from three clans in the Serengeti National Park, Tanzania. The scientists identified and validated 149 genome regions, where high-ranking and low-ranking individuals differed in the methylation of DNA (differentially methylated regions, DMRs). “We could, for the first time, provide evidence for epigenetic signatures of social inequalities in both young and adult spotted hyenas”, says Dr Alexandra Weyrich, head of the working group “Wildlife Epigenetics” in the Leibniz-IZW Department of Evolutionary Genetics and senior author of the paper.

The findings show that these epigenetic signatures are stable across life stages – and that they are linked to important physiological processes: Many of the identified DMRs were involved in the regulation of energy conversion, immune response, glutamate receptor signalling and ion transportation. “Especially the large number of DMRs in genes involved in energy conversion caught our eye”, says first author Colin Vullioud, data scientist in Weyrich’s working group. Co-author Dr Sarah Benhaiem, co-head of the Serengeti Hyena Project, explains: “We suspect that this may be driven by differences in behaviour and specifically the greater use of long-distance foraging trips by low-ranking than high-ranking females – the latter monopolising resources in their clan territory.” Interestingly, these genes were more methylated (or hypermethylated) in low-ranking adult females but not in cubs. This could indicate an adjustment of low-ranking adult females to higher energetic costs of frequent long-distance commuting, a behaviour not displayed by cubs. “Although the exact physiological consequences of the observed hypermethylation remain to be investigated, these findings are consistent with our observations and hint at the sought-after missing link between social and physiological factors”, Weyrich and Benhaiem conclude.

The analyses built on the expertise in epigenetics of the Leibniz-IZW as well as on the long-term research on spotted hyenas in the Serengeti, which started in 1987. The females in this investigation are individually known and their social status has been tracked for generations. This provided ideal conditions to study the links between behaviour, physiological factors, epigenetic modifications and fitness in terms of survival and reproduction in a wild population. “We collected our samples without invading the life of the hyenas”, say Dr Marion L. East and Professor Dr Heribert Hofer, founders of the Serengeti hyena project and co-authors of the paper. “We followed our study animals, collected super-fresh droppings immediately after they were produced and preserved gut epithelium samples from the surface of the faeces.” The use of samples collected in a non-invasive manner is one of the strengths of the investigation, the authors surmise. “The capture methylation method we used enriches methylated DNA as well as mammalian DNA, which improved the amount of hyena DNA over bacterial DNA and the quality of the sequencing data”, explains Weyrich.

DNA methylation is a chemical modification of the basic building blocks of a cell's genetic material. This modification is enabled by the transfer of methyl groups to nucleobases at certain positions in the DNA. As the basic structure of the respective nucleobase is unaltered, DNA methylation is not a genetic mutation, but a modification which determines whether this part of the DNA is ‘being used’ (activated) or switched off. DNA methylation is the most important epigenetic modification and thus a pivotal part of making genetic information available to the physiological processes within a cell.

Spotted hyenas are highly social and a model for social status-related differences in life history traits that are accompanied by differences in physiological processes and health. In hyena clans, females and their offspring socially dominate all immigrant males, and social status is behaviourally “inherited” by cubs from mothers who gain privileges associated with maternal social status. “As in some primate species, young hyenas receive social support from their mothers during interactions with group members. From these they learn that they can dominate all individuals which are submissive to their mother, but have to submit to those which their mother is submissive to”, explains East. Therefore, social status is stable and predictable because it is determined by family relationships and behavioural conventions.

“Additionally, the effects of social status on life history trajectories and health are typically passed across generations”, adds Hofer. For example, high-ranking females have priority access to resources in the clan territory and do not need to commute as much as low-ranking females to find food. They are therefore much more often present at the communal den and more frequently nurse their young. The milk-dependent cubs disproportionally benefit at this early stage in their life – by growing faster, having a higher chance of surviving to adulthood and starting reproduction at an earlier age than the offspring of low-ranking females.

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JOURNAL

Communications Biology

METHOD OF RESEARCH

Data/statistical analysis

SUBJECT OF RESEARCH

Animals

ARTICLE TITLE

Epigenetic signatures of social status in female free-ranging spotted hyenas (Crocuta Crocuta)

ARTICLE PUBLICATION DATE

28-Mar-2024

LA REVUE GAUCHE - Left Comment: Search results for HYENA 

Daytime pastoralist activities do not negatively affect spotted hyenas in Tanzania

by Forschungsverbund Berlin e.V. (FVB)

Spotted hyena with Maasai pastoralist and cattle in Ngorongoro Crater.

 Credit: Oliver Höner/Leibniz-IZW

Pastoralists herding their livestock through the territories of spotted hyena clans along dedicated paths during daytime do not reduce the reproductive performance of hyena clans, nor elevate the physiological "stress" of spotted hyenas. This is the result of a new study led by scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) and the Ngorongoro Conservation Area Authority (NCAA).

The scientists analyzed 24 years of demographic and physiological data from eight spotted hyena clans—two of which were exposed to activities by pastoralists. The activities of pastoralists were predictable, diurnal and did not disrupt important behaviors in the mostly nocturnal hyenas. This may have allowed the population to perform well, the scientists suggest. The open access paper is published in the Journal of Animal Ecology.

Human activities can strongly affect wildlife but the effects can vary greatly, depending on the type of activity and the characteristics of the wildlife species involved. To promote human-wildlife coexistence, it is therefore important to assess which activities are sustainable for a given species.

Most past research has documented major changes in the behavioral response of such species to human activities, but did not examine whether such changes are indicative of the Darwinian fitness of wildlife (in terms of its survival and reproductive success) or physiological effects such as "stress" or allostatic load, which are much more relevant to conservation.

"Acquiring the long-term data for such research—especially on large, group-living carnivores, which may be particularly conflict-prone—is not easy because of the enormous financial and temporal demands involved. We assessed for the first time the Darwinian fitness and the physiological effects of a common human activity—livestock herding—in light of the biology and social system of our wildlife species," explains first author Arjun Dheer, doctoral student at the Leibniz-IZW.

The investigation was conducted on eight clans of spotted hyenas (Crocuta crocuta) living in the Ngorongoro Crater, a UNESCO World Heritage Site in northern Tanzania. "Livestock grazing and using mineral licks occurred predictably on a near-daily basis within the territories of two of our eight study clans between 1996 and 2016," adds Dheer.

This created a natural experiment of exposed and unexposed clans which the scientists exploited. "We tested whether the hyenas of the exposed clans had fewer surviving offspring than the unexposed hyenas and whether the herding activities increased the physiological 'stress' of the hyenas," explains Dr. Oliver Höner (Leibniz-IZW), head of the Ngorongoro Hyena Project and senior author of the paper.

To assess the fitness effects, the scientists used 24 years of detailed demographic data from the eight clans and to estimate physiological stress, they measured the concentration of glucocorticoid metabolites (fGMC) in 975 feces from 475 hyenas. The team also accounted for the effects of additional ecological parameters such as disease outbreaks and the abundance of African lions (Panthera leo), the hyenas' main competitor, and prey.

The main result was that hyena clans exposed to Maasai pastoralists moving through their territory with their livestock had similar juvenile recruitment and fGMC levels as unexposed clans. "Our results suggest that the hyenas in the Ngorongoro Crater coped well with daytime pastoralism," explains Dheer. A likely explanation for the lack of detectable effect on hyenas is that the activity was predictable and minimally disruptive because it occurred during daytime.

"Hyenas are mostly nocturnal when it comes to critical behaviors such as hunting," explains Höner. Even if pastoralist activities forced other critical hyena behaviors such as the nursing of young cubs into nighttime, it might not have been too much of an adjustment for them to make. "Spotted hyenas are behaviourally flexible. In other areas, they were observed to move their cubs to dens further away from the paths that pastoralists used, or to nurse more at night," Höner says.

The authors caution that such results should not be extrapolated in uncritical fashion. "In areas where pastoralism is more intense and environmental conditions such as the abundance of wild prey are less favorable than in the Ngorongoro Crater, pastoralist activities may well have a significant detrimental effect even on a behaviorally highly flexible species such as the spotted hyena," explains Höner.

"Our investigation highlights the need to develop evidence-based coexistence strategies within a local context to benefit both stakeholders and wildlife. It also underscores the importance of interpreting the effects of human activity in light of the socio-ecology of the species of conservation interest," concludes Victoria Shayo (Head, Department of Wildlife and Rangeland Management, Ngorongoro Conservation Area Authority). Additional scientific analyses that cover a variety of anthropogenic activities and species—and that measure effects on fitness and physiology—will be conducive to promoting human-wildlife coexistence.Emotions and culture are most important for acceptance of carnivore management strategies

More information: Arjun Dheer et al, Diurnal pastoralism does not reduce juvenile recruitment nor elevate allostatic load in spotted hyenas, Journal of Animal Ecology (2022). DOI: 10.1111/1365-2656.13812

Journal information: Journal of Animal Ecology 

Provided by Forschungsverbund Berlin e.V. (FVB) 

 

Both humans, nature change where lions and hyenas move

Lions and hyenas sometimes avoid people but can also adapt to human presence

University of Georgia

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The researchers found lions and hyenas tended to avoid particularly crowded roads, especially during the dry season. 

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Credit: Stephanie Periquet Pearce

Lions and hyenas are a familiar sight to tourists visiting Africa, with many looking forward to seeing them in person. But the animals may occasionally spend less time near roads crowded by humans, according to new research from the University of Georgia.

Etosha National Park in Namibia is a popular site to see animals like lions and hyenas. There are many human-made waterholes that animals gather around, often near the main road frequented by vehicles so tourists can get a good look.

But the presence of tourists can disrupt animals’ usual habits and schedules.

“The message here is not that tourism is bad. These large predators need large areas to roam and access prey, and tourism is a huge driver of many economies,” said Jim Beasley, co-author of the study and a professor in UGA’s Warnell School of Forestry and Natural Resources.

A main goal of his lab is understanding how carnivores and other wildlife use space to protect them from conflict with humans. This is especially important for extremely large parks like Etosha, which has many areas for animals to go where humans are less frequent.

“It’s important that we have these large parks that are accessible to tourists so they can come see these animals in the wild,” Beasley said. “But we should make sure that there are areas within these parks that these animals can go where there’s less tourism pressure.”

Animals partial to less crowded areas

The researchers used GPS collars to track the movements of 14 lions and nine hyenas from 2016 to 2024. They found that while lions and hyenas didn’t avoid busy areas completely, they did tend to stay near roads that weren’t as crowded, especially during the dry season.

“The dry season is when tourism is highest, so there’s going to be a lot more traffic,” said Jessy Patterson, lead author of the study and a doctoral candidate in UGA’s Warnell School of Forestry and Natural Resources. “The animals are still staying in that area because that’s where a number of waterholes are found, but they’re going to be found in the parts that are closer to the less trafficked roads.”

Lions seek out water more than hyenas

But the animals weren’t moving just because of people, the researchers said. Lions often stayed near waterholes, likely to drink or hunt.

Hyenas, however, didn’t stay near water as often. This could be because they get more water from their prey. But the animals could also be trying to avoid competition with lions that frequent the waterholes.

Lions also preferred areas with less plant cover compared to hyenas. Lions are ambush predators that use vegetation to hide, so the researchers said this finding was surprising.

“Sometimes, if the vegetation is really dense, lions aren’t able to hunt as successfully,” Patterson said. “Also, herbivores are more fearful on a landscape with large predators. They know if they’re near these areas of vegetation, lions can hide and ambush them. So, herbivores may be avoiding those areas for that reason, which means lions have to go hunt more in the open areas.”

By contrast, hyenas preferred places with more tree cover, likely so they could get out of the sun and cool off in the shade.

Studying animal behavior important for park management

Though no two regions have the exact same landscape, the researchers stressed the importance of understanding areas where large predators choose to rest and hunt. Knowing this could help park officials manage roads and waterholes while making sure animals stay safe and visible to tourists.

“National parks where these large carnivores occur are really important areas for conservation but also tourism,” Beasley said. “Tourism brings in a huge amount of revenue to a lot of countries, and many people want to go see large carnivores in the wild.”

The study was published in Global Ecology and Conservation and co-authored by Stephanie Periquet-Pearce, Madeline H. Melton, Brennan PetersonWood, Dipanjan Naha, and Claudine Cloete.

Hyenas were less likely to stay near waterholes, possibly to avoid confrontations with lions.

Credit

Brennan Peterson Wood

Journal

Global Ecology and Conservation

DOI

10.1016/j.gecco.2025.e03681 

Article Title

Effects of tourism on seasonal movements and fine-scale habitat selection of African lions and spotted hyenas in Etosha National Park, Namibia