Articles tagged with Predators
A Dartmouth study suggests that increasing competitor and predator beetle populations can prevent population explosions of pine beetles, a major forest pest. The research confirms that some species, like the southern pine beetle, exhibit extreme fluctuations in abundance with no middle ground.
Researchers found that embryonic sharks can detect electric fields emitted by potential predators and respond by reducing respiratory movements. This innate avoidance response allows them to recognize dangers and try to escape, even in vulnerable egg cases.
A University of Illinois study found that global warming could lead to increased nocturnal activity in ratsnakes, making them better adapted to warmer temperatures. This shift could result in a population expansion and altered ecosystem dynamics, with potential impacts on native bird populations.
The 244-million-year-old Thalattoarchon saurophagis, a giant ichthyosaur, provided significant findings on the recovery of modern marine ecosystems following a severe Permian extinction. The discovery sheds light on the dynamics of evolving planet and its impact on today's environment.
A new study in the Bering Sea found that predator-prey relationships prioritize prey density over total biomass. This discovery challenges conventional management methods, which often rely on biomass data.
A study found that peacock courtship calls attract distant females, suggesting a potential advantage for males in securing mates. The calls may serve as a form of advertising, warning predators of the male's vulnerability and increasing his attractiveness to females.
Researchers found elk become more vigilant and consume less food when humans approach, affecting health and calving success. Human activity type, not just numbers of people, influences elks' reactions.
Researchers discovered that some mantis shrimp species use muscle to propel their spears, unlike their larger cousins which rely on ballistics. The study found that smaller mantis shrimps use a spring-loaded catapult mechanism.
A new study by UBC researchers reveals that whales and dolphins require specific high-energy diets to survive, contradicting conventional wisdom. The study compared the diets of 11 species in the Northeast Atlantic Ocean, finding differences in prey consumed and muscle performance.
Land-based hermit crabs remodel their shells to accommodate growth, but rare empty snails on land require them to kick others out of their homes. This unusual behavior is a result of the crabs' evolution to take advantage of a niche, leading to socialization in a typically solitary animal.
A new study by Professor Grant Brown and colleagues reveals that a fish's personality affects its ability to recall predator threats. Shy trout retain information about predator odors for up to eight days, while bold trout forget within 24 hours.
Researchers found that silvery fish have evolved a multilayer structure in their skin containing two types of guanine crystals, allowing them to maintain high reflectivity and conceal themselves from predators. This adaptation could lead to better optical devices, such as LED lights and low-loss optical fibers.
Researchers observed phytoplankton fleeing from zooplankton and even from chemical scents of predators. Fleeing helps the alga survive and makes a difference between life and death.
A new study reveals that sundew plants use catapulting snap tentacles to propel prey into their leaf trap, enhancing digestion and capture efficiency. This unique mechanism increases the plant's ability to capture larger insects and improves overall carnivory capabilities.
A new study finds that climate change could lead to significant changes in Pacific ecosystem distribution, affecting thousands of marine animals and coastal communities. Some species, like loggerhead turtles and sharks, may face harsh impacts, while others, such as seabirds and tunas, may benefit from shifting habitats.
Researchers have discovered a small wasp that hunts and paralyses redback spiders, reducing their population. The Agenioideus nigricornis wasp, previously forgotten for over 200 years, is widespread across Australia and plays a crucial role in controlling the redback spider population.
Researchers have successfully used papaya as a banker plant to control silverleaf whiteflies, reducing pesticide use and promoting environmentally friendly pest management. The system involves using non-stinging wasps to feed on the whiteflies and is being tested in commercial greenhouses.
A new study found that changes in lake water chemistry, caused by acid rain and logging, are leaving small water organisms like plankton without adequate armor, making them easy prey for predators. The researchers warn that this could have significant consequences for the entire ecosystem.
Researchers found evidence that a feathered, but flightless dinosaur, Sinocalliopteryx, was able to snag and consume small flying dinosaurs. The fossilized remains of three Confuciusornis were found in the belly of Sinocalliopteryx, revealing its voracious eating habits.
Researchers at Princeton University used a unique simulation to study collective motion in animal groups, finding that coordinated movements can dissuade predators. The study shows that group formation itself is an evolved defense mechanism, mirroring the behaviors of real animals.
A study by University of Exeter researchers found that the demise of one carnivore species can indirectly cause another to become extinct due to ripple effects on a food web. This supports growing evidence against 'single species' conservation approaches, favoring instead ecosystem-centric strategies.
A deep-sea squid species has been observed using a unique defensive strategy where it counter-attacks and then leaves its arm tips attached to the predator. This behavior allows the squid to create a diversion and escape from predators.
A study found that bats eavesdrop on fly sex sounds to earn two flies for one, increasing the risk of being attacked and eaten. This demonstrates that increased conspicuousness during mating is a significant cost.
Researchers found that southern dumpling squid's prolonged mating rituals result in temporary muscle fatigue, affecting their swimming ability for up to 30 minutes. This discovery provides new insight into the evolution of reproductive strategies and behaviours.
A study by Purdue University researchers reveals that hornworm caterpillars adapt to increase the efficiency of converting food into energy when threatened by predators. They also increase nitrogen extraction and lipid content. However, this adaptation comes at a cost in later developmental stages.
Research reveals that copper from brake linings and mining operations impacts salmon's ability to detect predators via their sense of smell. This altered state makes them more susceptible to attack by predators.
A new study confirms cougars are re-populating their historical range across the US Midwest. The research reveals cougar populations have spread from Texas to Ontario and Manitoba, with males traveling long distances.
Barbara Block's research on large predators in the California Current has led to groundbreaking discoveries about marine hotspots and migratory highways. Her award-winning project aims to protect these areas by building 'predator cafés' and increasing public awareness through real-time tracking data.
Researchers at the University of Leeds found that wire bridges built to help bats cross busy roads do not work. Bats prefer their original routes over the bridges, crossing at low heights and showing no change in behavior despite prolonged exposure.
Researchers discovered that T cells employ a Lévy walk strategy, characterized by short and long movements, to track down parasites like animal predators. This insight into immune-cell movement patterns can inform novel approaches to combat diseases such as cancer and HIV/AIDS.
Researchers at University of Alberta identify new coelacanth fossil, Rebellatrix, which challenges theory of evolutionary stagnation. Found in British Columbia, the 240-million-year-old species had a forked tail, indicating it was a fast-moving predator.
Research conducted by Oregon State University reveals that the loss of predators in the Northern Hemisphere has led to an increase in populations of moose, deer, and other large herbivores. This surge in population density is crippling young tree growth and reducing biodiversity, contributing to deforestation and reduced carbon sequest...
A new study has found that sublethal concentrations of Roundup can alter the morphology of amphibian tadpoles, causing them to change shape in ways that mimic predator-induced changes. This is the first study to show a pesticide inducing morphological changes in a vertebrate animal.
A new study has shed light on how species and their natural enemies have chased each other across continents for millions of years. The research used population genetics to analyze the DNA of small insects and their wasp enemies, finding that some plant-eating insects have outrun their predators for hundreds of thousands of years
Researchers from Notre Dame and two universities are studying the impact of speciation on parasitic wasps and their fruit fly prey. The study may help control pests in orchards, saving the apple industry millions annually.
A fossilized bushcricket from the Jurassic period has revealed a new species' musical call, shedding light on the acoustic environment and potential auditory capacity of other animals. The song was reconstructed using biomechanical principles and is believed to have been used for long-distance communication.
Research by the Universities of Exeter and Liverpool reveals that redder ladybirds are more poisonous than their paler peers, with better-fed individuals producing stronger warning signals and toxic chemicals. This variation in coloration is linked to diet in early life, making redder ladybirds less likely to be eaten by predators.
High CO2 levels in ocean water disrupt fish's central nervous system, impairing hearing, smell, turning, and predator evasion. Fish with high oxygen consumption are likely to be most affected.
A new study reveals that predation on juvenile Steller sea lions is significantly underestimated and may be preventing the population from recovering. The study suggests that predators, such as orcas, are targeting more juveniles as populations decline, leading to a 'productivity pit' where breeding females are reduced.
Researchers at the University of Georgia have found that releasing ladybird beetles in the upper crown of infested trees can effectively control hemlock woolly adelgid populations. The study suggests a new approach to managing the invasive pest, which has been killing Eastern hemlocks across the southeastern US.
Researchers discovered that predators choose diets with optimal balance of protein and fat to produce healthy eggs, outperforming those without nutritional balance. This finding challenges the assumption that predators focus solely on calorie quantity, highlighting their selective eating behavior.
The study found that long, thin teeth and delicate dentition were associated with thicker forelimbs, suggesting an evolutionary trade-off between the two traits. This convergence of traits suggests that these prehistoric predators may have relied on their forelimbs to catch and kill prey without fracturing their fangs.
A new study found that prehistoric predators with large canines had beefier arm bones, a combination seen in sabertooth cats and other extinct mammals. The researchers discovered this pattern through the analysis of fossilized arm bones and teeth, finding convergence across multiple species.
Researchers found that caterpillars in Neotropical regions mimic the warning coloration of toxic species for protection. The study reveals that mimicry is a common survival tactic among caterpillars, with some species forming Müllerian mimicry rings to avoid predators.
Researchers found highly acute vision in Anomalocaris, rivalling that of modern insects and crustaceans. The giant marine predator's compound eyes were exceptionally preserved, with each eye containing over 16,000 lenses.
Anomalocaris, a 515 million-year-old fossil, demonstrated highly acute vision to support its predatory lifestyle. Its compound eyes contained over 16,000 lenses, providing exceptional clarity while hunting in well-lit waters.
A species of ancient predator, varanopid 'pelycosaur', survived a major extinction event in the Permian Period. Varanopids had sleek bodies, saw-like teeth, and a diet consisting of over 70% meat, contributing to their long survival.
Fishing practices have led to a 90-per-cent decrease in top predators in North Atlantic and Pacific waters since the 1950s. The impacts are now being felt globally, with southern hemisphere predators facing a similar decline. This study highlights the need for strict management and enforcement to prevent further biodiversity loss.
McGill researchers have created a unified theory of ecosystem change that considers complex interactions between predators and prey in space and time. Generalist species like foxes play a crucial role in maintaining biodiversity by connecting different food webs.
Atlantic salmon in the Gulf of Maine face mortality risks from a changing climate, including warmer ocean temperatures and increased predator populations. The study suggests that post-smolts are more likely to survive if they avoid areas with high predator densities.
Researchers at the University of Toronto found that juvenile dragonflies exposed to predatory fish had survival rates 2.5 to 4.3 times less than those not exposed. This stress caused more dragonflies to fail metamorphosis and die, with 11% of larvae dying during this process.
Researchers found that Carnotaurus' unique tail structure supported a massive caudofemoralis muscle, allowing for exceptional straight-ahead speed. The muscle's attachment to the upper leg bones also enabled powerful flexing, giving the dinosaur increased power and speed.
In a cooperative breeding system, cichlid males who sire offspring defend more effectively against predators and stay closer to the breeding shelter. Subordinate males' helping behavior is linked to direct fitness benefits, including paternity and increased safety.
Research suggests that illusory memories can enhance survival by providing extra protection against predators. Additionally, these false memories can also contribute to improved problem-solving skills and a more optimistic self-concept. Memory illusions are seen as an adaptive mechanism, essential for human psychological well-being.
Biologists have discovered that glow-in-the-dark millipedes use their bioluminescence as a warning signal to avoid attacks by nocturnal predators. In the experiment, four times more non-glowing millipedes showed evidence of predation compared to glowing ones.
Research found that wolves and elk avoided high-quality habitat near trails with human activity above two persons per hour, suggesting a refuge zone for elk from predators. Thresholds of human activity on trails lead to wildlife disturbance and ecological change, according to the study.
In a remarkable discovery, ground beetle larvae have evolved to lure and consume amphibians, reversing the typical predator-prey relationship. The larvae use unique movements and sit-and-wait strategies to draw in prey, before attaching themselves using double-hooked mouthparts.
Researchers at University of Washington discovered that salmon and other fish predators maintain huge gut capacity to capitalize on unpredictable pulses of food. This 'no guts, no glory' survival tactic allows them to survive despite regular periods of famine.
A recent study discovered a large, reproductive population of king crabs in the Palmer Deep along the west Antarctic Peninsula. The species is now established on the continental shelf in West Antarctica and has the potential to drastically reduce seafloor biodiversity. This finding highlights the invasive nature of the king crab popula...
A new study published in the Journal of Zoology found that the Tasmanian tiger's weak jaws made it unlikely to catch large prey like sheep. The research suggests that its inability to kill large prey may have hastened its extinction, highlighting the vulnerability of large predators with specialized diets.