Articles tagged with Wild Populations
Research reveals that European wildcats and domestic cats generally avoided mating for 2,000 years after domestic cat introduction. However, rates of interbreeding rose rapidly around 50 years ago in Scotland, likely due to dwindling wildcat populations and habitat loss.
A global study reveals that regions with abundant large herbivores have a more variable tree cover, benefiting biodiversity. This finding highlights the crucial role of megafauna in shaping ecosystems and underscores the need for conservation strategies to protect these species.
Asian longhorned ticks, originating from East Asia, have been detected in Ohio, with over 1 million estimated in a single pasture. Researchers stress the need for early detection and targeted control measures to manage these persistent pests.
Researchers discovered a bacterium, Bisgaard taxon 45, responsible for the deaths of six elephants in Zimbabwe and possibly more in neighboring countries. The finding highlights infectious diseases as a threat to endangered African elephant populations.
Rising Arctic temperatures are causing a mass migration of zooplankton, which Pacific right whales rely on for food. This shift is also drawing industrial fishing fleets northward, increasing the risk of ship collisions and gear entanglements.
A recent study by the University of Exeter and Wildlife Conservation Society found tens of thousands of endangered sharks and rays are caught annually off the Republic of the Congo. Most of these species are juveniles and vulnerable to extinction.
Researchers found a 70% reduction in wild pig populations and a corresponding decline in environmental rooting damage within 24 months of control efforts. The study suggests that management efforts exceeding 40-60% population removal per year can significantly reduce populations, but unknown is the rate of recovery if efforts cease.
Researchers found that seabird couples with compatible personalities have better parenting success and lower divorce rates. This is because they can make informed decisions together when one parent is away finding food at sea.
A genetic study reveals that Pennsylvania's ruffed grouse population has more genetic diversity and connectivity than expected, despite decades of decline. The findings suggest that implementing appropriate protections could prevent further declines in the species.
Researchers analyzed 78 documented incidents of porpoise harassment by Southern Resident killer whales from 1962 to 2020. The study suggests three plausible explanations: mismothering behavior, limited opportunities to care for young due to malnutrition, and a specialized salmon diet that makes eating porpoises highly unlikely.
The illegal wildlife trade is a significant financial portfolio that creates state-level security and development risks. Implementing AML laws and sharing intelligence with banks can boost IWT law enforcement. Countries like Singapore, UK, and Australia are making progress in combating money laundering and IWT.
A new study by uOttawa and Trent University found that the development of Terry Fox Drive in Ottawa has led to a 70% decline in Blanding's turtle populations despite wildlife fencing and new wetlands. The researchers predict that the turtle will reach quasi-extinction threshold within the next few years.
A Texas A&M research team found that a population of endangered red-crowned parrots is thriving in urban areas, with four main roosts in the Rio Grande Valley. The parrots' adaptability to human environments and lack of competition for food sources make them an unusual example of a species doing well in urban areas.
Researchers found that two common songbirds have smaller eyes than their counterparts from less bright outskirts, adapting to urban light. This study suggests that sensory pollutants like human-caused light may play a role in the decline of bird populations.
Scientists have mapped the reproductive strategies and life cycle of an endangered coral species, offering a glimmer of hope for its recovery. The purple cauliflower soft coral's findings can inform conservation strategies and potential restoration efforts, including the creation of new coral colonies to repopulate areas of habitat.
Researchers found that huckleberry patches and forestry road density significantly affect grizzly bears' mortality risk. Securing critical food resources through reduced human access near roads is crucial for bear conservation.
A new study provides a comprehensive genetic dataset of the black rhinoceros, shedding light on its evolutionary history and population structure. The research reveals six major historical populations and four subpopulations, highlighting the impact of tectonic rifts and human activity on the species' genetic diversity.
A study analyzing data from KoalaBASE found that car strikes, dog attacks, and chlamydia-related illnesses are responsible for a significant number of koala deaths in South East Queensland. The research suggests that interventions such as road signs, overpasses, and information campaigns can help reduce these fatalities.
Accelerometer sensors can detect sickness behavior in wild boar, allowing for early detection of African Swine Fever. The study found that infected boars were 10-20% less active daily than healthy ones, making this technology a potential tool for disease control and prevention.
Research finds that water movement between lakes can transport environmental DNA, making eDNA a promising tool for tracking aquatic species and monitoring biodiversity. The study highlights the importance of considering landscape connectivity when designing eDNA surveys to ensure accurate biodiversity assessments.
African lion populations are declining due to various threats including habitat loss, prey depletion, and human-wildlife conflict. A new study reveals the importance of considering both ecological and socio-political factors in conservation strategies.
Researchers used drones to track Przewalski's horses and found a complex, multilevel social structure similar to human societies. The herd's movements revealed kinship-based relationships and familiarity between animals, with mare-mare bonds playing a significant role in harem formation.
Researchers from Cornell University and University of Wisconsin-Madison developed a new audio technique to estimate the Spotted Owl population across the entire Sierra Nevada ecosystem. The analysis yielded an estimated 2,218 to 2,328 adult owls on federally managed lands, providing critical conservation baseline.
Researchers found that genetically modified tobacco mutants, impaired in their defenses, outperformed wild-type plants in years with low herbivore pressure. The mutants' prioritization of growth and reproduction over defense allowed them to thrive in environments with limited insect damage.
The recovery of gray wolf populations in the United States has been broadly successful over the past 30 years, with many regions now sporting robust populations. However, these growing populations face significant threats, including fragmented habitats, barriers to dispersal, and increased encounters with humans, pets, and livestock.
A study led by Max-Planck-Gesellschaft researchers uncovered the conditions that trigger curiosity in wild orangutans, including social and environmental factors. Young orangutans were more likely to observe and approach novel objects, while the presence of association partners increased their curiosity.
A survey of 1,000 Japanese respondents found that people's attitudes towards lethal wildlife management (LWM) were more species-specific than previously thought. Largemouth basses, crows, and wild boars were deemed most acceptable for LWM, while carp, parrots, and monkeys were considered the least acceptable. The study also revealed no...
Scientists will use AI-powered monitoring stations to track species populations and assess the effectiveness of agri-environment schemes in improving biodiversity. The study aims to demonstrate how different farming systems and practices affect species populations, providing crucial evidence for sustainable land management policies.
Researchers tracked eastern wild turkey nesting in five southern U.S. states over eight years, finding slight changes in nest timing linked to temperature and rainfall. However, these shifts were minimal and less than three hours, suggesting turkeys may be inflexible in their reproductive activities.
A new fish species, Garra panitvongi, has been discovered in Myanmar's Ataran River basin, shedding light on its unique biology and habitat. The species, previously unknown to science, was identified by researchers who encountered it during fieldwork in the region.
Scientists have developed a new genetic technology called Ifegenia that suppresses populations of Anopheles gambiae mosquitoes, which primarily spread malaria in Africa. The system targets females, which are the primary disease carriers, and kills them, halting parasite transmission.
A study by Max Planck Institute of Animal Behavior found that American mink can regain almost full ancestral brain size within 50 generations after escaping captivity. This reverses the long-held assumption that domestication causes permanent brain size loss in animals.
A new study reveals that elephants' dietary habits are more varied than previously thought, with individual preferences playing a significant role. The research used DNA metabarcoding to analyze fecal and hair samples from two groups of elephants in Kenya, finding that even family members may eat different plants on the same day.
A study by the Netherlands Institute of Ecology found that great tits are struggling to adapt their breeding timing to cope with climate change, leading to a decline in population numbers. The researchers used innovative methods to speed up evolution and predict the impact of climate change on natural selection.
Researchers warn that exploding wild pig and macaque populations in Southeast Asia pose significant zoonotic disease risks to humans. The study, led by the University of Queensland, found that these animals can carry diseases that can be transmitted to people, highlighting the need for urgent management solutions.
Researchers found that orangutans can produce two separate sounds simultaneously, like songbirds or human beatboxers. This phenomenon may hold clues about the evolution of human language and its similarities to beatboxing.
A new study highlights the potential of living cell banks to contribute to global conservation priorities. Cryo-banked samples provide crucial genetic diversity and reintroduction opportunities to increase adaptability and resilience in threatened species.
A new UK project, GEMALOR, monitors hatchery-reared lobsters to ensure wild populations remain genetically diverse. Researchers will assess genetic diversity in both captive and wild environments to improve broodstock management.
Researchers found that giraffes on either side of the rift have not interbred for over 1,000 years, with females showing no signs of migration. The study suggests that Masai giraffes are more endangered than previously thought, requiring separate but coordinated conservation efforts.
A new biodiversity study shows that even seemingly healthy ecosystems with increasing species numbers may already be on the path to decline and loss of species. The study's findings suggest that species richness is not a reliable metric for monitoring ecosystems, as it can mask negative trends in species extinction.
Climate change affects giraffe populations differently than expected, with higher temperatures positively affecting adult survival but rainier wet seasons negatively impacting both adults and calves. Heavy rains increase parasites and reduce nutritional value of vegetation, further threatening giraffe survival.
A study published in PLOS Biology found that polar fish reproduce later and produce more eggs than tropical fish, confirming model predictions. As a result, polar fishes tend to produce more eggs than tropical fishes.
Current measures to protect grasslands in the Qinghai-Tibetan Plateau are damaging the ecosystem and should be stopped. Small burrowing mammals, like the plateau pika and zokor, play crucial ecological roles in maintaining ecosystem health and biodiversity.
A new holistic framework evaluates mental and psychological wellbeing in wild animals, including physical and behavioral indicators for positive and negative experiences. This approach has the potential to provide crucial early warning signals about species challenges and population declines.
The US federal government's management of wild horses is flawed due to conflicting societal views, leading to unsustainable population growth. A clear definition of feral equids is needed to implement effective management plans that balance ecosystem health and fiscal responsibility.
A new Concordia University study found that the rapid growth of urban honeybee-keeping is adversely affecting nearby wild bee populations. The researchers compared bee population data collected from sites around Montreal in 2013 and 2020, finding a decline in wild bee species richness associated with increasing honeybee abundance.
Researchers used drones to capture images of corn fields damaged by wild pigs in Texas, finding an average loss of 3,416 kg of corn per hectare and a direct cost to producers of up to $48.24 per hectare. The damage occurred mainly in later growth stages, when corn ears were maturing.
A study found that more than 70% of Chinook populations have declined over the last 50 years, but some populations are recovering due to their diverse migration and spawning strategies. Cold water and marine habitats play a key role in their success, particularly for fall and summer stocks.
A study published in Scientific Reports predicts that less than 20% of endangered mountain gorillas would survive more than 100 days past the first confirmed case of Ebola infection. Vaccination strategies are suggested to increase survival rates, with at least half of habituated gorillas vaccinated within three weeks of confirmation.
A new study reveals that the most endangered turtles and crocodiles are those with unique life strategies, which carry out critical processes in their ecosystems. The researchers highlight the urgent need for effective conservation management plans to protect these species and their habitats.
A study found that human-caused mortality is the leading source of death for mountain lions in California, primarily driven by conflicts with humans over livestock and collisions with vehicles. The research also suggests that human tolerance plays a crucial role in conserving large carnivores in landscapes shared with humans.
A recent study published in The Science of Nature found that parasites and body condition are crucial factors in determining the vulnerability of fish to angling. The research revealed that fish with high body condition and parasites, as well as those with low body condition but no parasites, were less likely to be caught by anglers.
Research found that inbreeding is a major factor contributing to the decline of the endangered Southern Resident killer whale population. The study, published in Nature Ecology and Evolution, indicates that inbred individuals have lower survival rates and birth rates compared to those with lower levels of inbreeding.
Bald eagles in northwestern Washington state have become a boon to dairy farmers due to climate change, deterring pests and removing animal carcasses. The shift in salmon spawning schedule has reduced available carcasses on rivers, forcing eagles to seek alternative food sources from dairy farm by-products.
A new study reveals that whooper swans thrive in UK nature reserves, with survival rates significantly higher and population growth up to 6% annually. This could lead to a doubling of the species' wintering population in the UK by 2030.
Researchers from Xi'an Jiaotong-Liverpool University identify vital differences between the plants, including pollinators and lifespan, confirming their classification. The study highlights the importance of recognizing every species for conservation programs.
A new study reveals that northern and southern resident orcas differ in their hunting behaviors, with males catching more salmon per hour than females. Southern resident males outperform females by 152%, highlighting a distinct pattern of foraging that may contribute to the population decline.
A new study by Monterey Bay Aquarium reveals the key components contributing to successful releases of orphaned southern sea otters back into the wild. The research emphasizes the strong maternal drive of surrogate female sea otters in nurturing and caring for pups, resulting in a three-quarters success rate.
A new study finds that releasing captive-bred native fish into the wild negatively impacts entire ecosystems, disrupting delicate balances and leading to reduced genetic diversity. The practice, which has been used for over a century, may be doing more harm than good.
Researchers suggest that returning to spawn at different ages can lessen the impact of a bad year and increase population stability for Sacramento River fall-run Chinook salmon. Changes in hatchery practices and fishery management could help restore the age structure of the population, making it more resilient to climate change.