Articles tagged with Predators
A team of evolutionary biologists used mathematical models to determine that ancient carnivores could bring down massive herbivores like mastodons and giant ground sloths. The largest cave hyena might have been able to take down a 5-year-old juvenile mastodon weighing over a ton.
A study by University of Liverpool scientists found that amphibians using toxins for defense are at higher risk of extinction, contradicting a long-held evolutionary hypothesis. This discovery challenges our understanding of the relationship between defense mechanisms and species diversification.
Researchers found that predators benefit from eating invasive prey only when their traditional diet remains intact. Native prey is necessary for predators to stay healthy and prosper. Invasive species may provide a supplemental food source, but they don't replace native prey, which is essential for predator survival.
A new study reveals that viewers of 'Law and Order' have a better grasp of sexual consent than those who watch other crime dramas, suggesting a link between punishment of sexual predators and reduced predatory behavior. The study explores the influence of watching crime drama franchises on attitudes towards sexual consent.
Researchers find overexploitation of resources by adaptable predators can cause long-term negative effects on food webs. The change in prey can trigger an extinction cascade where species are wiped out in a domino effect.
Scientists at STRI in Panama compared the diets of two caterpillar species and found that generalist moth caterpillars could actively store toxic plant chemicals in their bodies. This discovery opens new avenues for understanding plant-insect coevolution and has potential medical applications.
New research emphasizes the importance of preserving large fish populations to maintain carbon cycling in blue carbon ecosystems. The loss of top predators can have serious environmental consequences, including reduced carbon storage in coastal wetlands.
A study found that male lizards' bright colors signal attraction to females but increase risk of being attacked by birds. Despite this, 83% of male lizard models survived over five days due to color adaptations.
A Dartmouth College study found that Arctic mosquitoes are thriving under climate change, emerging earlier and growing faster due to warmer temperatures. This boosts their population, threatening caribou and other wildlife, with a predicted 53% increase in survival probability by 2°C warming scenario.
A single gene mutation in a bacterial species triggered dramatic changes across its microbial community, altering biofilm production and affecting other species. This study suggests that fine-scale genetic differences within populations can have significant impacts on ecosystems.
Researchers found that relative amounts of predator and prey biomass are predicted by a simple mathematical function called a power scaling law. This means that even in diverse ecosystems, from oceans to savannas, there are always fewer top predators than expected in resource-rich environments.
A new study reveals that the ratio of predator-to-prey biomass decreases as prey biomass increases in diverse ecosystems, including grasslands, forests, lakes, and oceans. The study analyzed tens of thousands of populations across 2,260 ecosystems globally, finding a consistent pattern of biomass scaling.
Researchers found a consistent pattern that in crowded settings, prey reproduce less, leading to fewer predators. This discovery suggests a new law of nature governing ecosystems globally.
The newly discovered Pentecopterus was found in a 5km meteorite crater, providing insights into the evolution of eurypterids. The species, lived 467 million years ago, has well-preserved fossils that show its diverse developmental stages.
A study on túngara frogs reveals the 'decoy' effect, where females choose less attractive mates over more appealing options when a third, inferior mate is introduced. This challenges rational choice models used in sexual selection theory and highlights the influence of context on mating decisions.
Research reveals differences in growth rates, parental care, and survival rates among tropical and temperate songbirds. Tropical birds tend to grow faster and have higher parental investment per offspring, leading to improved survival rates outside the nest.
A study published in Science reveals that humans exploit adult fish populations at 14 times the rate of marine predators and hunt large land carnivores nine times faster than their wild counterparts. This unprecedented level of predation highlights humanity's role as a 'super predator' driving widespread wildlife extinctions.
A new model presents a common mathematical structure underlying food-web interactions, allowing ecologists to view all species' connections using a single language. The model reveals previously unobserved similarities between different ecological reactions and has profound implications for infectious diseases, fisheries, and conservation.
A new study reveals that humans prey on adult species at rates up to 14 times higher than other predators, leading to widespread extinction and restructuring of food webs. This behavior alters observable traits in prey populations and transforms ecological interactions.
In a study of Bahamas mosquitofish, female genitalia evolve to show 'no means no' to predators and interbreeding males. Females in areas with high predation risk have smaller genital openings, while those without predation risk have larger, more oval-shaped openings.
Dogs evolved to pursue-pounce predators in response to climate change, shifting from ambushing to endurance running, according to a new fossil study. The research suggests that predators adapt to changing habitats rather than their prey's anatomy.
Research suggests that stripes do not provide an advantage for animals living in groups when multiple targets are presented simultaneously. This contradicts the long-held assumption that stripes evolved to make it difficult for predators to capture animals moving in a group.
A new UNSW Australia study suggests that reintroducing Tasmanian devils to the mainland could restore ecosystem health by controlling red foxes and feral cats. The devil's presence would also benefit small and medium-sized animals, such as bandicoots and ringtail possums.
A study of 214 species finds that vertical slits indicate ambush predators, while horizontally elongated pupils suggest grazing prey. Researchers believe this shapes allows for optimal vision in dim light and panoramic view.
A new genus of water mites has been discovered in the Brazilian Atlantic rainforest, with the species found only in bromeliad tank environments. The research reveals that these mites are top predators in their aquatic microcosms.
Researchers tracked five pandas with GPS collars for three years, finding they exhibit three daily activity peaks - morning, afternoon, and midnight. This unique pattern may be linked to their low nutrition quality from bamboo consumption, allowing them to adapt to their environment.
Researchers found that the risk of white shark attack for individual ocean users in California has fallen strikingly by over 91 percent since 1950. Information on coastal population growth, seasonal and weekly beach going, surfing, scuba diving, and swimming empowers ocean users to avoid large predators.
Researchers studied seahorse's unusual skeletal structure and found its square-tail design provides flexibility and strength, allowing for energy-efficient grasping mechanisms and crushing resistance. This discovery may inspire robotics applications in laparoscopic surgery, industrial systems, or search & rescue robots.
Grey seal pups who practice in pools have improved breathing patterns and longer breath-holding periods during their transition to sea life. Researchers believe this may be due to stimulation of facial nerves causing a drop in heart rate, helping them conserve oxygen.
Research published in BMC Evolutionary Biology found that male nightingales' songs contain specific features, such as repeated song sequences and varied song types, which signal their ability to care for offspring. These song features are linked to greater paternal efforts, including more frequent feeding and defense of the nest.
Research found that ladybird color reveals toxicity to predators, with more conspicuous species being less likely to be attacked. The study used modified cameras and artificial versions of each species to test predation risk, revealing that brighter colors act as warning signals.
A recent study examines the resurgence of major predators on the US West Coast and in Yellowstone, revealing rising conflicts with humans and other species. The researchers suggest multi-species approaches to address these tensions and develop more effective management strategies.
Researchers found that applying a fence around a nest protects it from harvesting operations and predators, with a map directing citizen science efforts for maximum benefit. However, predation can counterbalance the positive impacts of protection.
Researchers found that snails vary in their ability to remember and respond to training, with those good at one type of memory being poor at others. The study reveals that there is no universally smart snail, but rather individuals are smart at some things but not everything.
A new UT study suggests that prey emit warning cues to survive and also help predators avoid danger. The theory proposes a mechanism called concurrent reciprocal selection, where both prey and predators benefit from the signals, ensuring their survival.
Researchers found that trap-jaw ants use their spring-loaded mandibles to jump out of harm's way when an ant-trapping predator stalks, doubling their survival rate. The study verifies that the mandibles aid the ants' survival by allowing them to eject themselves from a dangerous predicament.
A study published in PLOS ONE found that trap-jaw ants use their spring-loaded mandibles to jump out of harm's way when threatened by an antlion. This behavior increases the ants' survival rate, with 15% of encounters resulting in escape.
A new species of dinosaur, Saurornitholestes sullivani, discovered by University of Pennsylvania researcher Steven Jasinski had an unusually large olfactory bulb, implying a powerful sense of smell. This keen sense may have made the species an intimidating predator.
A Virginia Tech researcher has made a groundbreaking discovery about the origins of bioluminescence in millipedes. By studying a rare species that glows in the dark, he found that its early evolutionary role may have been related to antioxidant properties, not warning predators.
Researchers found that bold field crickets suffer from higher mortality rates compared to shy individuals, likely due to increased predation. This study, published in Behavioral Ecology, highlights the importance of considering individual personality traits when studying animal survival and ecology.
Research from Concordia University and Memorial University of Newfoundland found that the introduction of foreign species has resulted in an increase in prey per predator, which could lead to a decrease in prey species. This study sheds light on the impact of invasive mammals on the island's food web.
Túngara frogs exhibit different escape responses when attacked by ground versus aerial predators. They flee from snakes on the ground but move towards bats in the air, effectively undercutting their flight path. This study highlights the flexibility of prey strategies to evade predators with diverse attack modes.
Researchers at NYU Tandon School of Engineering have developed a robotic predator that can spook zebrafish just as well as a real one, revealing new insights into fear and anxiety in animal populations. The robot's effectiveness was comparable to that of live red tiger oscar, but with more consistent avoidance responses.
Researchers have deciphered gibbons' subtle 'hoo' calls in response to specific events like foraging and predator encounters, revealing context-specific vocal communication. The study's findings suggest that gibbon vocalisations may hold clues about the evolution of human speech.
Elephant soundscapes tested for effectiveness in deterring night-time raids on farmland in southern India, with results showing 90% success rate using tiger sounds and 73% using leopard sounds. The study's findings suggest a potential solution to the growing problem of human-elephant conflict in agriculture.
Flocking behavior of European starlings is studied in a computational model called Star Display. Researchers found that agitation waves form when individuals repeat the fear reaction or escape maneuver of a close neighbor.
A previously undiscovered species of giant salamander-like amphibian was identified in southern Portugal, growing up to 2m in length and feeding mainly on fish. The discovery reveals that this group of primitive amphibians was more geographically diverse than previously thought.
A newly discovered crocodilian ancestor, Carnufex carolinensis, filled one of North America's top predator roles before dinosaurs arrived on the continent. The 9-foot long land-dwelling crocodylomorph likely preyed upon smaller inhabitants like armored reptiles and early mammal relatives.
A new study reveals that dottyback reef fish can change color to imitate various damselfish species, allowing it to sneak up on unsuspecting young and avoid detection by larger predators. This unique ability makes it harder for prey to develop strategies to evade the dottyback.
A study published in Current Biology reveals that the dusky dottyback, a small predatory fish found on coral reefs, changes its color to mimic other fish species to hunt juvenile offspring. This clever strategy also helps the fish avoid detection by predators.
A study by USF biologists reveals that an abundance of predators can help control parasite transmission in amphibians, potentially reducing disease risk. The researchers identified a key trait of predators that predicts their ability to dilute disease risk.
A study found that diverse small predators, like dragonfly larvae, reduce parasitic flatworm infections in frogs. The research suggests a link between dwindling global biodiversity and increased infectious diseases.
Researchers have created a reliable growth curve for white sharks in the western North Atlantic, revealing they grow more slowly and mature later than initially estimated. The study found males reach maturity at around age 26 and females at around 33, leading to new estimates of population replacement rates.
A new variant of the rabbit hemorrhagic disease virus is threatening the survival of the Iberian lynx, a predator that relies heavily on wild rabbits for prey. The study found a significant decline in rabbit populations and a notable drop in the number of Iberian lynx cubs born in the wild.
Research reveals Norwegian lemmings use aposematism to signal their defensiveness through warning calls and conspicuous coloration. This strategy helps reduce the risk of becoming prey, making their long-distance movements more conspicuous.
Researchers found that aphids which consistently display risk-averse or risk-prone behavior tend to thrive better than those that exhibit mixed strategies, especially when faced with predators. The study suggests that committing to a consistent behavioral type can be key to achieving overall fitness and reproductive success.
A new study reveals three regional mysteries about blue mussels in the Northeast coast, including generation gaps and predator activity. The research suggests that mussels can be a good sentinel species for rocky shores but requires more knowledge about their behavior in different estuarine settings.
A recent study analyzing over 326 interactions between corvids and their prey found that they have a much smaller impact on other bird species than previously believed. In 81% of cases, corvids did not affect their potential prey, while in 6% of cases, some beneficial relationships were observed.
Researchers study goshawk attack tactics, finding birds hold victims in gaze for initial stage before switching to parallel pursuit. Prey evade capture by making sharp sideways turns, exploiting predator's visual guidance.
A new study from University of Michigan researchers reveals that competition between predators and parasites can strengthen biological control systems, rather than weaken them. This counterintuitive finding has potential applications for organic farming and pest control, where synthetic pesticides are not allowed.