Articles tagged with Ethology
Fish have designed their perfect partners in a new experiment, revealing simple male preferences for larger females and more complex female tastes favouring traits like longer tails or brighter colours. This approach mimics sexual selection, where attractive traits become stronger down the generations.
Researchers found that sharks can detect low-frequency sounds from considerable distances and respond by dramatically changing direction away from the source. They detected sounds from up to 243 feet away and were more sensitive to lower frequencies.
Wild orangutans learn survival skills through a combination of social and individual learning. The study, published in Science, found that infants engaged in social learning more frequently than individual learning, with social learning triggering subsequent exploration for up to 2.5 hours.
Researchers discovered that dog brains synchronize with the rhythm of consonant-structured words, similar to human brains, and show a distinct brain response around 400ms after the start of each word. This finding supports the idea that exposure to speech can lead to a consonant bias in dog brains.
Researchers at the University of Warwick found that the indri, the world's only known singing lemur, uses a vocal technique similar to trained opera singers to hit high notes. The indri opens its mouth wider to project higher-pitched vocalizations through the forest, a process that may serve a similar purpose to formant tuning in humans.
Researchers found that adult chimpanzees in Senegal intentionally hand over tools to infants and youngsters, facilitating learning. The study, published in Frontiers in Psychology, reveals a unique form of teaching where adults deliberately provide tools and food to younger individuals.
Research from Eötvös Loránd University and the HUN-REN Research Centre suggests dogs exhibit brain activity similar to human self-control, potentially shedding light on ADHD and obesity. This study uses non-invasive EEG measurement to investigate canine brain activity during restraint commands.
Tadpoles of the Japanese common toad exhibit lower kin recognition and social preference for siblings, contrary to previous studies. Social isolation, not kinship, influences association behavior in these amphibians.
A new study from Virginia Tech scientists reveals the complex relationship between temperature, photoperiod, and bear hibernation behavior. The research found that temperature and day length interact to shape hibernation behavior, potentially disrupting climate-driven changes in hibernation timing.
Researchers studied two closely related fish species in Lake Tanganyika, finding that they share the same preferences for simple choices but diverge when faced with complex decisions. The blue featherfin makes rapid, decisive choices based on one feature, while the golden featherfin takes longer to decide and considers multiple features.
Researchers combined iNaturalist photos with scientific observations to study harvestman care for 85 species, doubling the known data on parental care. The study reveals two evolutionary paths for paternal care and sheds light on the evolution of care in the Gonyleptoidea group.
In contrast to previous studies on human food-sharing practices, female Guinea baboons have diverse sources of meat and do not rely heavily on their primary males. The researchers observed that females often catch prey themselves and access alternative sources of meat.
Research reveals how dogs developed specialized forms in response to human needs, such as compact sled dogs for Arctic regions and lean hunting dogs for tropical forests. Genetic adaptations also emerged to cope with oxygen-poor air at high altitudes, mirroring human populations' genetic traits.
A study found that pumas change deer behavior, reducing the likelihood of deer-vehicle collisions by 67%. Deer alter their use of space and time where pumas are present, overlapping less with roads.
A study of bull shark behavior found that individuals are slightly more likely to associate and socialise with relatives than unrelated sharks. This 'kinfluence' effect may contribute to both proximity-based associations and directed social interactions, particularly among male sharks.
A recent study on orphaned grizzly bears found a high mortality rate of 83%, largely due to human-bear conflicts, illegal killings, and intraspecific killing. The study also highlights the risk of habituation to humans, which can lead to serious conflicts, particularly when combined with oversized size from excessive growth during reha...
Elephants released from human care successfully reintegrate into the wild, exhibiting behaviors comparable to those of their wild neighbors. While some individuals show age- and sex-related differences, overall, rewilded elephants adapt well, with most stress levels within normal ranges.
A study found that people behave more curiously than cautiously around a service robot, noticing it more often and even grabbing multiple candies at once. However, some visitors felt slightly uncomfortable when the robot came close, highlighting the need for deeper user assessments.
Researchers at Osaka Metropolitan University successfully generated red blood cell-like cells from canine induced pluripotent stem cells (iPSCs), marking a significant step towards artificial cell production for blood bank reserves. The study used CRISPR-Cas9 genome editing to target glycophorin A, allowing the team to visualize and tr...
Social animals exhibit a range of pre-war preparations, including environmental cues and memories of past events. These behaviors can impact socio-cognitive evolution, population dynamics, and community structures. Preemptive behavior is widespread in social species, depending on the current threat level.
A new study assesses how climate change affects predator-prey dynamics in a semi-arid ecosystem. Researchers found that during periods of low precipitation, owls shifted to different prey, increasing dietary overlap variability. Temperature was the strongest driver of these changes.
A study published in Proceedings of the National Academy of Sciences found that bumblebees display observable 'liking and disliking' behaviours after consuming different liquids. This suggests that insects can evaluate tastes as pleasant or unpleasant, pushing the understanding of their inner life.
A UMD-led study reveals that wild bats balance different types of immune defenses based on sex, age, and competition for mates. The researchers found that male bats rely more on rapid-response immune defenses, while females invest in targeted responses to pathogens.
A new study has found that changes in a senior dog's gait can be an early warning sign of dementia. The research tracked the stride length of 88 geriatric dogs over time, revealing a significant decrease in front leg stride length with worsening cognitive decline. This change was found to be more pronounced than age-related decline alone.
New research reveals orangutans selectively consume certain medicinal plants in specific sequences, suggesting 'self-medication' behaviors. The study, based on 20 years of observations, found plant combinations with known medicinal benefits are eaten consistently beyond simple nutrition needs.
Researchers at Oregon State University found that bat rays produce a chemical cue to alert other rays of potential danger. The study used three tanks with individual bat rays and simulated a predator in one tank, causing the other rays to exhibit a flight response.
A new study from Stockholm University found that young guppies raised with visual contact to live fish developed larger brains and relatively larger olfactory bulbs compared to those with only screen-based exposure. This suggests that interactive social experiences during development may be important for normal brain growth.
Urban male bowerbirds collect more colorful and larger human-made items than rural rivals, suggesting a preference for these traits in females. Researchers found that red decorations are more vivid in urban areas, while green decorations are duller.
A new study found that participating in awe-inspiring natural phenomena, like a solar eclipse, increases people's identification with science and sense of belonging. The researchers also discovered that awe plays a powerful role in this process.
A recent study found that homing pigeons use simple route averaging to improve their navigation when flying together. This strategy allows the birds to generate social routes from solitary ones, providing evidence for a simpler mechanism of social learning than previously thought.
Researchers found that the gut responds to protein deficiency by activating a fast neural circuit and a slower hormonal signal, which selectively changes dietary priorities. The study reveals a previously unknown gut-brain signaling system that rapidly alters feeding behavior in animals.
Scientists analyzed GPS tracking data from 37 animal species paired with cellphone location data to reveal how humans impact wildlife. The study found that 57% of species were impacted by human presence and landscape modification, with varied responses between species.
Researchers have captured the behavior of scissor-tailed nightjars creating a unique sound by snapping their wrists together during courtship and copulation. The study sheds light on lesser-known bird communication methods and raises questions about the nuances of mechanical sounds.
A novel imaging pipeline called Neuroplex enables simultaneous measurements of up to nine distinct neuronal populations in living mice. This approach accelerates the pace of scientific exploration into how the brain controls behavior by overcoming fundamental limitations in miniscope recordings.
Scientists found that queen bumblebees are faster learners and better at identifying scents than worker bees. This skill helps them differentiate between flowers, find the best ones, and ensure colony survival. Understanding their cognitive abilities could reveal fundamental insights into learning and evolution.
A study found that psilocybin, a key magic mushroom ingredient, significantly reduces aggressive attack behavior and energetically costly social behaviors in mangrove rivulus fish. The compound selectively dampens escalated social conflict without suppressing lower-energy social display behaviors.
A team of researchers created a touchscreen-based game task inspired by hide-and-seek to elicit curiosity in resident Japanese macaques. The monkeys preferred moderate uncertainty, spending nearly 100 trials without rewards. This study supports the goldilocks principle, where animals seek moderately complex or uncertain stimuli.
A 33-year study of wild capuchin monkeys in Costa Rica reveals how climate fluctuations impact social dynamics, changing the costs and benefits of living together. Larger groups can offset internal competition by expanding their range and claiming areas from smaller groups, but this strategy is sensitive to climate variability.
A study found that wild sulphur-crested cockatoos learn about novel food through social learning, with juveniles more likely to conform to the majority's preferences. The birds' dietary knowledge spread rapidly through their community, influenced by age groups and sex.
In a unique behavior, monkeys on Gibraltar have learned to eat dirt to help them digest the junk food consumed by tourists, which disrupts their gut microbiome. The researchers found that geophagy is socially learned and has become part of the macaques' culture, with different troops having preferences for certain types of soil.
A Linköping University study shows that playing with dogs for just a few minutes a day can significantly improve the emotional bond between owners and their pets. Dog training did not have the same effect, suggesting that playtime is crucial for building strong relationships.
Researchers found that crabs' iconic sideways walk originated from a single, forward-walking ancestor around 200 million years ago. This rare innovation likely contributed to the ecological success of true crabs by making their escape direction unpredictable.
A new study provides the first direct evidence of cuckoo egg-laying behaviour in cavity nests, rejecting a centuries-old myth about egg-carrying. Cuckoos use two distinct strategies to parasitize host nests, involving trade-offs between accuracy and risk.
A study shows how a kea parrot with a missing upper beak uses innovative fighting techniques to dominate his group and gain social status. He achieves this through 'beak jousting,' which proves more effective than other methods, leading to improved health benefits and social recognition.
Researchers at Salk Institute discovered that naked mole rats can transition to peaceful queen succession, demonstrating flexibility in their social order. This finding challenges previous understanding of colony dynamics and opens new avenues for studying eusocial mammals.
A new study reveals that sunbirds employ tongue suction to slurp nectar, a novel mechanism in vertebrates. This finding highlights the power of convergent evolution, where different species adapt to similar ecological challenges in distinct ways.
Entomologist Mark Moffett observes harvester ants congregating with smaller cone ants in Arizona's Chiricahua Mountains. The unusual behavior involves the cone ants licking and nibbling the harvester ants' body surfaces, possibly consuming calorie-rich dust-size morsels.
Wild grey squirrels show a preference for almonds over pumpkin seeds, even when they require a longer climb to reach. This suggests that animals may benefit from waiting or working harder for a better outcome in natural decision-making scenarios.
A study by University of California, Berkeley biologists found detectable alcohol in at least one flower of 26 of the 29 species of plants tested. Hummingbirds and other animals consume small doses throughout the day without apparent effects, but may metabolize ethanol like mammals do.
Researchers found that mosquitoes' rectal cells interact with their nervous system, influencing appetite and behavior. The study suggests the gut plays a key role in regulating behavior across species, with implications for understanding mosquito feeding habits and potential treatments.
A recent study published in Science found that humans and animals have overlapping preferences for certain qualities of an animal's call, with agreement strongest for lower-frequency sounds. The study used a gamified citizen science experiment involving over 4,000 human participants from around the world.
Researchers found that bull sharks have active social preferences and choose their social partners, similar to humans. The study revealed that adult sharks form the core of the social network, while younger sharks are less socially connected.
Ravens use spatial memory and navigation to find food scattered over the landscape, visiting areas with a history of frequent wolf kills. They can remember the long-term 'resource landscape' created by wolves, allowing them to locate kills across tens or hundreds of kilometers
Researchers found that bonobos and chimpanzees exhibit similar levels of aggression in zoos, contradicting their differing reputations. The study suggests that aggression levels vary within each species, with some groups displaying higher aggression, and that environmental factors may play a role in shaping their behavior.
Researchers engineered a 3D-printed robotic rattlesnake to test how 38 zoo animals responded to rattling behavior. The study found that the rattling display functions as an effective deterrent, with species sharing natural geographic range with rattlesnakes exhibiting stronger fear responses.
Researchers mapped GLP-1 expression in 25 brain regions in each sex, uncovering striking differences in key circuits. The atlas reveals sex-biased expression in certain medullary nuclei, with higher Glp1 densities and numbers of Glp1-expressing neurons in females compared to males.
Researchers observed finless porpoises in Ise Bay, Japan, interacting with adults beyond their mothers, challenging the long-held assumption of their solitary nature. Infants approach and swim alongside adults who are not their mothers, suggesting a potential weaker mother-calf bond compared to other species.
Researchers found that jackdaw chicks learned to associate predator sounds with danger when paired with adult alarm calls, becoming more vigilant. However, they did not learn from contact calls or a non-predatory birdcall, suggesting an evolutionary process to ensure only biologically meaningful links are learned.
Research found that dogs and 16-month-old toddlers exhibited similar prosocial behaviour when searching for a hidden object, with over 75% of them indicating or retrieving the object. In contrast, companion cats rarely showed such behaviour, suggesting domestication may not be enough to produce human-like cooperation.
Researchers found caterpillars mimic ant signals using precise rhythmic beats to gain acceptance, feeding, and protection. The most ant-dependent species produce regular, complex rhythms similar to those used by ants.