Articles tagged with Predators
A team of researchers found that wild birds can learn to avoid distasteful prey by observing what others eat, resolving a long-standing evolutionary problem. This breakthrough highlights the critical role of social information transmission in predator-prey dynamics and eco-evo processes.
A seabird colony on Ascension Island creates a 'halo' of depleted fish stocks, with reduced flying fish numbers detected up to 90 miles from the island. The study provides rare evidence for Ashmole's halo, a pattern of prey depletion first proposed 60 years ago.
A recent study suggests that near-death experiences (NDEs) in humans may be linked to evolutionary mechanisms, specifically thanatosis - the phenomenon of death-feigning or tonic immobility. This defense mechanism is thought to have arisen as a survival strategy in animals and has been preserved across various species, including humans.
Researchers found that non-native species are more successful in the less-diverse Pacific, where they outnumber native species by 30%, compared to the more-diverse Atlantic. Predation also played a crucial role in controlling invasive species, particularly in tropical regions.
A study reveals that hunting pressure affects the behavior of endangered Yellow-breasted capuchin monkeys, causing them to avoid areas with abundant food sources due to increased risk of predation. The research suggests that poachers pose a significant threat, and the risk of predation outweighs the availability of food in their habitat.
A new study suggests that when tyrannosaurs rose to dominance, their juvenile counterparts filled the ecological niche of medium-sized carnivores. The research analyzed 60 dinosaur communities and found no decline in prey species diversity, indicating that juvenile tyrannosaurs took over the role of missing middle-sized predators.
Researchers measured the bite force of juvenile Tyrannosaurus rex fossils, finding they could exert up to 5,641 newtons, between that of adult T. rexes and smaller dinosaurs. This discovery provides insight into how young T. rexes fed and interacted with their environment.
Scientists used accelerometers and audio recorders to study the behavior of Canada lynx, capturing detailed sounds of hunts, escapes, and social interactions. The findings provide valuable insight into the hunting habits and social dynamics of this elusive species.
Researchers study individual bees' decision to sting based on alarm pheromone concentration, revealing a 'stopping effect' at high concentrations. The study suggests environmental factors drove the evolution of pheromone-based communication in honeybees' defensive behaviour.
A study in Wisconsin found that wolf introduction reduced deer-vehicle collisions by 24%, with an economic benefit of 63 times the harm caused by livestock predation. The study suggests that wolves' impact on prey behavior is a key factor in collision reduction.
A study published in Environmental Toxicology and Chemistry reveals high levels of contaminants in killer whales near Norway, affecting their tissues and offspring. The findings also highlight the persistence and mobility of chemicals in marine ecosystems.
New research reveals coral can fight back against juvenile crown of thorns starfish with stinging cells, damaging their arms and delaying growth. The study shows coral's defensive mechanism may not be enough to protect it from other threats like climate change.
A review of over 500 academic papers found that wasps are valuable for agriculture, providing biocontrol services worth $416 billion annually. Wasps also contribute to pollination, visiting 960 plant species, including those dependent on them for reproduction. Their venom and saliva have medicinal properties.
Predatory bacteria grow faster and consume more resources than non-predators in the same soil, according to a study. These active predators play an outsized role in how elements are stored in or released from soil, with some species growing 36% faster and taking up carbon 211% faster.
New research reveals that Seychelles giant trevally's home range increases as it grows, emphasizing the need for long-term tracking and monitoring of threatened species. The study suggests conserving nursery areas like St Joseph Atoll to protect the next generation and finding a balance between harvesting and catch-and-release fishing.
A study published in PLOS Biology found that human screams communicate multiple emotions beyond fear, including pain, anger, fear, pleasure, sadness, and joy. Researchers used four experiments to investigate the acoustic diversity of scream calls and found that listeners responded more quickly and accurately to non-alarm screams.
A new study reveals that gray wolves adapted their diet over thousands of years, shifting from a reliance on horses during the Pleistocene to caribou and moose today. The researchers found that horses accounted for half of the ancient wolf diet, while modern diets consist mainly of caribou and moose.
Researchers at UC Santa Barbara found that coral predators have a significant impact on young coral growth and survival, even when protected by fish. The study suggests that density has little effect on predation, as corals are vulnerable to predators regardless of group size or protection.
Researchers at Tel Aviv University reconstructed the nutrition of stone age humans, finding they were specialized carnivores with a high-fat diet. The study used multiple lines of evidence, including genetics, metabolism, and archaeology, to conclude that humans evolved as apex predators for two million years.
A study at Tel Aviv University reveals that fireflies produce strong ultrasonic sounds that may serve as a defense mechanism against bats. The sounds are undetectable to the fireflies themselves but can be heard by bats, potentially keeping them away from poisonous fireflies.
In a groundbreaking study, researchers discovered that female putty-nosed monkeys recruit males to defend them from predators using alarm calls. The results suggest that females' general alarm requires males to assess the threat and ensure group defense.
A new study by psychologists at Emory University found that people can accurately discern most emotions tied to screams, but those of happiness are often misjudged as fear. Screams convey strong emotions, and researchers speculate that this may be an evolutionary carryover bias, where humans err on the side of caution.
A recent study reveals that coral-eating fish excrete symbiotic dinoflagellate algae by the millions, potentially keeping reefs healthy. This unexpected twist on coral reef symbiosis confirms that poop from coral-eating fish is an important environmental source of beneficial coral symbionts.
Researchers found that Amami tip-nosed frog altered its hind limb length in response to the invasive mongoose, with longer legs potentially aiding escape. The frog's endurance also increased under strong predation pressure from the mongoose, but not its burst movement ability.
A camera-trap study found that black bears are adept at finding and stealing the remains of adult deer killed by pumas. This 'kleptoparasitism' reduces the calories pumas consume, causing them to hunt more often and eat smaller prey when bears are not active.
Researchers found that increased deciduous vegetation leads to higher moose populations, which in turn affects wolves and ultimately caribou. Human land use, like forestry, significantly increases vegetation productivity, contributing to caribou declines.
Researchers found that birds can recognize and remember the wing patterns of artificial butterflies that evaded their attacks, as well as those with a foul flavor. The study suggests that being hard to catch may deter predators at least as effectively as chemical defenses.
Research found that Mexican wolves were 121% more likely to disappear when legal protections were weakened, contrary to theories that lethal removal would reduce poaching. The disappearances were likely caused by poachers hiding evidence of their activities, leading to underreported poaching.
A study found that sea otters in Monterey Bay are maintaining patches of healthy kelp forest despite a decline in overall kelp forests along the California coast due to an outbreak of sea urchins. Sea otters increase their consumption of urchins in the remaining kelp patches, but ignore those in barren areas with low nutritional value.
A new study reveals that the Anteosaurus, a 260-million-year-old predator, was capable of outrunning and tracking down its prey effectively due to its specialized nervous system and fine-tuned sensory organs. The research found that the animal's brain and balance organs were optimized for hunting swiftly and striking fast.
Researchers found that antlion larvae can remain motionless for up to 61 minutes by 'playing dead', confusing predators and encouraging them to search elsewhere. This clever tactic allows the larvae to stay alive in an arms race with their predators.
Researchers discover that male lyrebirds use mimicry to recreate the panicked alarm calls of a mixed-species flock during courtship and mating. This 'acoustic illusion' may be a crucial sexual behavior for males, helping them gain reproductive advantage by tricking females into responding as if they're at risk from a predator.
Researchers found that male superb lyrebirds create an acoustic illusion of a mobbing flock during courtship and copulation to trick females into staying with them. This complex behavior challenges traditional explanations of mimicry in biology, suggesting that elaborate bird songs can be driven by sexual conflict and deception.
A recent UNSW Sydney study pairs satellite imagery with site-based field research to show that removing dingoes leads to overgrazing and reduced soil quality. The effects of dingo removal are visible from space, with vegetation inside the fence having poorer long-term growth than outside.
Researchers found that zooplankton grazing on phytoplankton results in higher DMS concentrations, allowing marine predators to track their prey. The study suggests that large marine animals use DMS concentration gradients to find food sources.
A new study reveals that wolves have evolved specific ambushing tactics to catch and kill beavers by exploiting their poor eyesight and well-developed sense of smell. Researchers found that 89-94% of ambushing sites were downwind, allowing wolves to remain undetected.
A new study has found that American alligator hatchlings are more active and exploratory than spectacled caiman hatchlings, reflecting the strength of maternal protection. This research has important conservation implications for increasing population sizes of endangered crocodilian species.
Researchers used passive acoustics to study shell-crushing behavior in whitespotted eagle rays, distinguishing prey types based on acoustic features. The study provides critical data for conservation efforts and ecosystem monitoring in Florida's coastal waters.
A new study by Queen Mary University of London and the University of Maryland challenges the idea that Spinosaurus was an active aquatic predator. Instead, researchers suggest it likely fed from the shoreline, snatching fish like a heron or stork, while also taking small prey on land or in water.
Research finds that flowers provide essential nectar and pollen for predatory insects, helping them survive up to 8 times longer. This can significantly reduce the need for agricultural pesticides, improving crop production while supporting biodiversity.
A new species of mosasaur with shark-like cutting teeth has been discovered in Morocco, highlighting the diverse range of predators that thrived in ancient seas. The discovery suggests that marine reptiles were expanding their diversity before they went extinct, contradicting previous assumptions about ecosystem decline.
Researchers investigated the flagellar arrangements of 15 unicellular species, revealing their impact on swimming speed and fluid flow architecture. Dinoflagellates were found to excel in both feeding and stealth behaviors due to their unique flagellar arrangement.
Researchers found that high cortisol concentrations in newborn fawns were associated with lower survival rates. Cortisol levels varied between study areas, suggesting other environmental factors may influence mortality rates.
After 40 years of civil war, Gorongosa National Park's animal population has rebounded, with most species returning to the park through conservation efforts. However, researchers found that large herbivores like zebra and wildebeest are rare, while baboons and waterbuck dominate the landscape.
UTA researchers resurrected preserved Daphnia eggs to investigate how species adapt to invaders, finding extensive genetic variation in responses to a novel predator. The team's work allows for real-time observation of evolutionary processes, shedding light on drivers of change in natural settings.
A study by University of California San Diego biologists demonstrates that honey bees use a contagious and honest visual signal to deter Asian hornet attacks. The 'I see you' (ISY) signal involves guard bees shaking their abdomens laterally, increasing in intensity as the threat intensifies.
A Cornell University research team will use acoustic technology to monitor and manage soil-dwelling pests, preventing damage from predators. The project aims to provide turfgrass managers with greater knowledge and decision-making power about pest distributions and management strategies.
Researchers found southern Australian long-finned pilot whales can mimic killer whale calls and engage in 'duetting' with other whales, revealing a complex acoustic communication system. The study's findings raise questions about the extent of home ranges for these whales.
Researchers found that flashier lizards are more likely to be attacked by predators due to their bright colors. However, females prefer brighter males because they may possess high-quality genetic material or resources.
A team of researchers from Penn State describes a system where oil droplets exhibit 'non-reciprocal' interactions, chasing down other droplets that flee like prey. The system is controlled by chemical signaling and can be tuned to understand interactions in many-body systems.
A new study uses transnational genetic monitoring to track population dynamics of brown bears, wolves, and wolverines in Norway and Sweden. The approach reveals evidence of recovery and highlights the impact of humans on apex predator populations.
Pumas and culpeo foxes can successfully coexist due to distinct diets, with pumas primarily feeding on introduced hare species and foxes on smaller mammals. This study sheds light on predator interactions and ecosystem balances in the Andes.
Researchers found that 84% of newly-created and recolonized beaver ponds remained occupied for more than a year. However, when a wolf kills the beaver, no pond remains active. This study suggests wolves can alter wetland creation without changing beaver abundance or behavior.
Researchers found that competing groups of insectivores consume the same type of food, such as chironomids, which could lead to an unprecedented ecocatastrophe. The study sheds new light on the decline in insect populations and highlights the potential cascading effects on ecosystems.
Research found that species-rich plant communities reduce herbivore impacts, supporting natural predators and providing less nutritious food for herbivores. This leads to increased plant biomass per square meter and lower damage from arthropod herbivores.
Researchers develop model that links movement of predators and prey to segregation of oil and vinegar, expanding theoretical framework from inanimate matter. The model reveals universal characteristics of active living matter, including bacteria, enzymes, and motor proteins.
Researchers discovered that ogre-faced spiders can detect both low- and high-frequency sounds using hairs and joint receptors on their legs. The spiders use these sensory systems to hunt flying insects by performing a choreographed backwards strike, which may be aided by directional hearing.
A new species of ancient marine reptile, Brevicaudasus jiyangshanensis, has been identified in China, featuring a short, flattened tail used for balance. This adaptation allowed the creature to float motionless underwater, conserving energy while searching for prey.
Marine predators consume more bait in mid-latitudes than near the equator, according to a new study. The researchers found that feeding intensity declines with increasing distance from the equator, and that warmer waters have little impact on bait consumption rates.
Researchers found that feeding animals is the strongest influence on animal activity in yards, with species like squirrels and raccoons being most common. The study confirms the urban-wildlife paradox, showing that suburban areas can have an abundance of wildlife compared to wild areas.