Articles tagged with Wild Populations
A recent study using DNA barcoding technology has updated the list of Israel's freshwater fish species, revealing 37% previously unknown. The research highlights the unique genetic distinctiveness of these populations and their implications for conservation efforts in arid regions.
A recent study suggests that many nocturnal Strepsirrhines live in pairs of males and females, challenging the long-held assumption that these primates are solitary. Researchers found that pair-living was the most common social organization among ancestors 70 million years ago.
A new method can help estimate the prevalence of disease in free-ranging wildlife by accounting for animal clustering. This approach may reduce the number of samples needed to detect a disease. The researchers focused on Chronic Wasting Disease (CWD) in deer, which tends to cluster in family groups, making this method particularly useful.
A new study has overturned conventional wisdom on wild turkey nesting survival, revealing that precipitation levels during nesting season are not related to reproductive success. The researchers found that temperatures above historical averages were associated with higher rates of daily nest survival during incubation.
Researchers found that commercial ship noise completely masks Cook Inlet beluga whales' most commonly used calls, compromising their critical communication. The study documents the complex vocal repertoire of the population and provides a quantified measure of masking by ship noise on their communication.
A study of wild orangutan males reveals that simply beating rivals in competitions does not lead to siring success. Instead, successful fathers spend more time near the females with whom they mate, suggesting a strategy of concentrating on one neighborhood rather than roaming widely is key.
A new study compiled over 600,000 records from US and Canadian wildlife rehabilitation centers to investigate the threats facing more than a thousand species by region, highlighting human activities such as climate change and extreme weather events
The study found that England's only resident population of bottlenose dolphins has declined to just 48 individuals due to various human impacts. The researchers call for urgent measures to protect the population and its habitats.
Researchers conducted extensive surveys and collected data from local communities, but found no evidence of Arabian leopards in Saudi Arabia. The study concludes that human-designed breeding programs and reintroductions are necessary for the recovery of leopard populations.
A recent study found that half of commercial caviar products in Europe are illegal, and some don't contain any trace of sturgeon. The research analyzed DNA and isotope patterns on 149 samples of caviar and sturgeon meat, revealing widespread poaching and violation of trade laws.
Researchers observed Canada goose flocks before and after a population-management cull, finding that the birds strengthened existing relationships rather than forming new connections. This social conservatism helps reduce the potential for increased disease transmission.
Researchers found that pollutants in green sea turtle eggs can feminize broods, increasing the risk of extinction due to a lack of males. The study suggests that climate change and pollution may be driving this trend, which could have severe consequences for the species' survival.
A new conservation tool, Lion Localizer, helps authorities track the origin of illegally traded lion parts by analyzing mitochondrial DNA. The tool provides critical information on population impact and resource allocation, supporting efforts to protect tiny West African lion 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.
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.
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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.
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.
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 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.