Articles tagged with Swimming
Research by Brown University scientists found that paramecia's buoyancy affects their ability to navigate flat surfaces. Under normal conditions, they use their sensory systems to turn and swim away, but with altered buoyancy, they get stuck at an angle, unable to complete the turn.
Researchers discovered that elephant seals dive more efficiently with moderate body fat by changing their buoyancy. As they add fat stores during months-long migrations, the seals become neutrally buoyant, reducing energy costs and increasing time spent feeding at depth.
Scientists at UW-Madison and FAU developed models of swimming turtles, revealing that longer, rotund turtles outperform slender counterparts in terms of energy efficiency. The study's findings have significant implications for understanding animal behavior and predicting environmental interactions.
A Brunel University study found that people are more likely to drop swimming if faced with higher prices, with a 29% decrease in activity. In contrast, other forms of exercise such as working out and brisk walking show minimal impact, suggesting targeted subsidies could boost participation.
Swimming-induced pulmonary edema is a potentially life-threatening condition affecting highly fit individuals who engage in strenuous or competitive swims, particularly in cold water. The unique combination of factors can lead to an accumulation of fluid in the lungs, resulting in fatal consequences if not addressed.
Researchers replaced live males with robotic replicas and found that female killifish were more likely to swim near yellow-colored replicas than other colors. The yellow pigment may be perceived as a "superstimulus", resulting in the females' preference for yellow mates.
Researchers question widely-held assumptions about hippo migration patterns, citing a lack of evidence for their ability to swim. Despite this, hippos have been found on several islands, sparking debate about the role of land bridges in their colonization.
Researchers discovered a simple scaling law that describes how the speed of an organism changes with its size, movement speed, and other factors. The study found that all animals, from tiny fish larvae to massive whales, can be described by one of two equations, indicating general principles at work.
Salmon that force themselves to move quickly through fast-moving water are more likely to die after passing through turbulent waters. Researchers found that burst swimming, a behavior similar to sprinting, can lead to impaired oxygen supply and increased stress metabolites in the blood.
New research by University of British Columbia scientists found that sockeye salmon forced to 'sprint' through fast-moving waters are more likely to die during their upstream migration. The study, published in Physiological and Biochemical Zoology, suggests that excessive burst swimming creates stress and impairs survival.
A study found that juvenile loggerhead turtles in the South Pacific Ocean swim against prevailing currents at a rate of 30 cm/sec. The turtles use multiple sensory cues to detect current flow and orient themselves for swimming.
Researchers found that bacteria like Caulobacter crescentus actively carve out a helical trajectory through the water using their entire body, contributing to swimming motion. This discovery sheds light on the evolution of cell body shape and has implications for understanding disease propagation and fertility.
Researchers have explained the emergence of a bacterial vortex by understanding its relation to physical mechanisms like collisions, boundary interactions, and fluid flow. Computer modeling and experimentation confirm that bacteria align themselves in the same direction due to their flagellar motion, creating a two-way fluid flow.
A new study led by the University of Miami Rosenstiel School found that Deepwater Horizon crude oil exposure harms mahi-mahi swimming capabilities, affecting survival and foraging abilities. The study revealed a 22-37% decrease in swimming velocity among juvenile fish exposed to oil.
Tropical ants have developed swimming abilities to navigate flooded forests, with over 50% of species exhibiting this trait. The ants' swimming techniques, such as using one leg to propel themselves forward and the other for stability, were analyzed in a study published in The Journal of Experimental Biology.
Researchers have discovered a clearer understanding of how mussels attach themselves to surfaces, which can lead to new classes of adhesives that work underwater and inside the body. The technology is based on the properties of catechol, a molecule found in mussel glue.
Researchers found that collegiate swimmers recovered faster and swam significantly faster when consuming chocolate milk compared to traditional sports drinks. Chocolate milk's unique carb-to-protein ratio provides essential nutrients for muscle refueling, supporting improved swim performance.
New research reveals that zebra fish use optic flow but steer towards stronger flows instead of away from them. This may be due to the turbid underwater environment where visibility is limited.
Harvard scientists produce the first realistic simulated shark skin, which reduces drag and increases swimming speed by 6.6% while decreasing energy expenditure by 5.9%. The artificial skin's performance is comparable to that of real shark skin, with improved drag reduction at slower flow speeds.
Researchers found that zebrafish exposed to alcohol exhibited increased swimming speeds in the presence of peers, while unexposed fish modulated their behavior accordingly. This social influence may constitute a form of leadership, challenging traditional views on individual responses to alcohol.
Researchers at Northwestern University developed a new metric to measure energy consumption efficiency in animals of different sizes. Contrary to expectations, the study found that the gray whale and skipjack tuna are almost equally efficient, with the whale's higher fuel consumption being an unavoidable consequence of physics.
A new study reveals that uric acid in urine generates hazardous 'volatile disinfection byproducts' in swimming pools when combined with chlorine. This reaction can lead to toxic compounds like cyanogen chloride and trichloramine, posing health risks to swimmers.
Researchers found that uric acid from urine combines with chlorine to form NCl3 and CNCl, potentially hazardous compounds. Swimmers can improve pool conditions by urinating in bathrooms, not in the pool.
A soft-bodied robotic fish with a flexible spine can mimic real fish swimming motions and perform rapid accelerations. The innovative design enables the robot to adapt to various environments, showcasing advancements in soft robotics.
Researchers documented dramatic differences in swimming ability between domesticated and wild trout, calling into question the effectiveness of hatcheries in conserving native populations. The study found that domesticated trout tend to grow faster but are slower sprinters than their wild relatives.
Sharks are tracked using instruments ingested by researchers gaining new awareness into their feeding habits and role in the ocean ecosystem. The 'shark's eye' view provides unprecedented understanding of shark behavior and movements.
Researchers found that flowing water impeds bacterial movement, making microbes more likely to attach to surfaces. This discovery has implications for studying marine ecosystems and preventing infections in medical devices.
Researchers at Oregon State University confirmed a correlation between ocean salmon's migration patterns and the Earth's magnetic field, revealing an innate navigation system. The study found that juvenile salmon can detect and respond to magnetic fields, using them to determine their location and direction.
Researchers will characterize and compare shark behavior when human noises are detectable versus masked, aiming to disrupt detection of humans. They plan to use speakers or personal maskers to broadcast artificial signals that mimic or mask the detected sound cue.
Engineers developed tiny self-propelled swimming bio-bots that can traverse viscous fluids and sense chemicals, opening up possibilities for medical and environmental applications. The bio-bots use heart cells to create movement through a wave-like motion, enabling unique navigation capabilities.
Researchers measured dolphin force using bubble DPIV, proving Gray's paradox was incorrect. Dolphins produce impressive power, even accelerating rapidly at 5400 W.
Scientists discovered that Atlantic slipper shell larvae control their swimming speed by subtly shifting the position of their velar lobes, demonstrating complex neuromuscular control. The ability to make small movements with these lobes allows the larvae to swim at varying speeds, determining individual dispersal and survival.
Researchers discovered that marine snail larvae control their swimming speed by shifting the position of their velar lobes, exhibiting complex neuromuscular control. The larvae can vary their speed from one body length per second to four body lengths per second within a single day.
Seahorses use their specially shaped heads to capture prey, including copepods, which are notoriously difficult to catch due to their speed. In calm conditions, seahorses achieve a 90% success rate in catching their intended prey.
Research shows ocean warming reduces swimming ability of large reef fish, impacting hunting, mating, and reproduction. The study suggests that coral trout populations may adapt to warmer temperatures, but further research is needed.
Researchers study stingray movement to develop more efficient unmanned underwater vehicles, allowing for deeper ocean exploration and rescue efforts. The unique swimming style of stingrays may lead to breakthroughs in submarine design, inspired by nature's optimal swimming gait.
A team of researchers at Montana State University has verified that microorganisms produce methane by swimming towards hydrogen gas. The discovery sheds light on the movement of biological cells towards hydrogen gas and its implications for climate change, carbon cycle, and early Earth processes.
A team of researchers has created a microfluidic device that sorts sperm cells based on their motility and ability to swim through narrow channels. This approach shows promising results in increasing the concentration of highly motile sperm, which could enhance the success of assisted reproductive technologies like in vitro fertilization.
Max Planck researchers demonstrate how the green alga Chlamydomonas synchronizes its two flagella using a resourceful rocking movement. The resulting mechanism is based solely on the coupling of the two movements, with no special sensors or chemical signals required.
Researchers discovered how jellyfish move with lowest cost of transport, using a critical pause between contraction and expansion to create a vortex that propels them forward. This feat allows the creature to travel 30% farther each stroke cycle, reducing metabolic energy demand by swimming muscles.
Researchers studied C. elegans worm's swimming patterns to gain insights into human health and disease, leading to potential applications in drug screening and designing smart soft robots. The study aims to provide powerful tools for developing sensitive screens to test drug compounds that affect nerve cells or muscles.
Researchers at Tel Aviv University found that triathletes experience lower pain intensity and have a higher pain tolerance due to a combination of physiological and psychological factors. They were able to withstand pain for longer periods and had better pain regulation, which may be attributed to their attitude towards pain.
Researchers from the University of Washington have discovered differences in dried filters from filter-feeding rays that allow them to be identified as either giant mantas or devil rays. The study provides valuable insights into the conservation of these gentle-natured rays, which are often hunted for their supposed health benefits. Th...
Researchers found that about 25% of mature female tiger sharks migrate from remote atolls to the main Hawaiian Islands between September and October, potentially to give birth. This study provides insight into tiger shark migration patterns and their potential link to attacks in Hawaii.
A quarter of mature female tiger sharks migrate from Northwestern to Main Hawaiian Islands, coinciding with shark birth season and months of highest bite risk. The researchers found that tiger sharks do not stay resident in specific bays for long periods, debunking the territoriality hypothesis.
A deep-sea squid, Grimalditeuthis bonplandi, has been found to use its long, thin tentacles with fin-like membranes to create the illusion of swimming clubs. This unique strategy may attract prey and deter predators by mimicking the movements of small animals.
Researchers from Brown University and the University of Wisconsin discovered that a high-angle helix enables bacteria to swim faster in viscoelastic fluids, clearing up previously conflicting findings. The study's findings have implications for understanding bacterial infection and fertility.
A French study found a significantly lower incidence of sports-related sudden death in women compared to men. The average age of sudden death was also lower for women. The study estimates an incidence rate of 0.51 per million female sports participants, highlighting the need for tailored screening strategies.
Conservation scientists work a substantial amount of their time outside regular office hours, with Japanese and Chinese researchers submitting nearly 40% of their manuscripts outside regular office hours. This trend is increasing, with potential negative impacts on the quality of scientific work and life-work balance.
Researchers found antibiotic-resistant strains in specific spots along the Hudson River, including Flushing Bay and Newtown Creek, which are likely linked to untreated sewage. The microbes identified pose risks to human health, particularly for those with compromised immune systems.
Researchers at MIT used high-speed video to record individual marine bacteria and found that a small flexible rod called the hook bucks during forward swims, causing the cell to tumble and reorient. This unusual mechanism helps bacteria navigate toward food in nutrient-sparse ocean waters.
Research by Adrian Bejan reveals that elite athletes in these sports are taller and heavier, allowing for more force to be applied as they move forward. This applies to pitchers like Max Scherzer, golfers like those in the top 10 of driving distance, and boxers who maximize punching power by gaining size.
The study reveals that species with low muscle activation frequency and high body stiffness are most successful in swimming. The researchers found the optimal values for each property, including a predicted stiffness similar to that of undulatory swimmers with a backbone.
A new study found that similar timing patterns govern the motion of swimmers like trout and sandfish lizards. The researchers developed a simple model to explain how these animals produce undulating swimming motions, which could also be used to design efficient swimming robots.
Researchers studied zebrafish larvae's hunting behavior using virtual reality, revealing two unknown types of neurons involved in processing movement stimuli. The findings show that the larvae's brain must filter and evaluate visual information rapidly to select appropriate motor patterns.
Scientists attached a device to entangled whales, showing how fishing lines change their behavior and deplete energy. The study highlights the dangers of added drag and buoyancy from fishing gear, posing significant threats to whales' ability to eat, migrate, and survive.
Researchers have identified evidence of a dinosaur's ability to swim with coordinated leg movements, as indicated by 15-meter claw marks found on a Chinese riverbed. The marks suggest the presence of a two-legged dinosaur that was swimming along the river and only its tippy toes were touching bottom.
A new rapid water-quality test could prevent unnecessary beach closures while better protecting the health of swimmers. The test's same-day results can help managers across the country determine whether beaches are safe for recreational use.
Researchers discovered that copepods switch to big power strokes in cold water, allowing them to overcome changing water temperature and viscosity. This adaptation helps copepods escape predators, but also makes them vulnerable to pollution-related changes in water viscosity.
Researchers found that whale baleen traps food particles at natural swimming speeds by tangling in flowing water. The flexible material, composed of keratin, forms plates with internal fibrous cores and bristly fringes that trap particles as whales skim or lunge through the ocean.