Articles tagged with Larvae
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A study published in Archives of Dermatology found that wet combing is more accurate than visual inspection for identifying active head lice infestations. The method correctly identified 90.5% of cases, while visual inspection only detected 28.6%. This finding has implications for the diagnosis and management of pediculosis capitis.
A University of Pittsburgh research team designed a propulsion system harnessing natural surface tension to propel small boats and robots. The technique uses an electric pulse to destabilize surface tension, causing the craft to move via the water's natural pull.
Farming of fish in ocean cages promotes infection and lowers fitness of wild fish, leading to higher death rates. Sea lice are a major example of disease transfer in ocean fish farming, causing widespread decline of wild fish populations.
Researchers discovered a Seychelles fly species that lays larvae instead of eggs, potentially revealing an evolutionary step to live birth. The study found that these flies' eggs hatch quickly and develop advanced structures, suggesting a unique reproductive strategy.
Scientists studying the larvae of a marine ragworm discovered that nerve connections between the photoreceptor cell and cilia regulate swimming motion. This finding sheds light on how early eyes evolved to sense direction and drive phototaxis in marine plankton.
Dr. Elizabeth North's research team will use in-water sampling and computer modeling to identify factors influencing oyster larvae transport in the Choptank River. The study aims to enhance oyster restoration efforts throughout the entire Chesapeake Bay.
Researchers at Caltech have found a signaling molecule in nematode worms that serves as both a population-control mechanism and a sexual attractant. The discovery could lead to new strategies to control parasitic nematodes, which affect the health of over a billion people.
Researchers at Johns Hopkins Medicine found that fruit flies use TRPA1 to sense single degree changes in the comfortable range, adapting to different temperatures through a multistep process. This discovery raises the possibility that mammals may also be able to sense small changes in internal body temperature.
Researchers found that parasitic flies in bee cells affect the size and behavior of emerging bees. Smaller bees are more likely to act as workers, while larger ones become queens. The study suggests that parasites may promote sociality in certain situations.
A new species of Bagworm Moth with predatory larvae has been discovered in Panama's tropical forest. The larvae construct portable structures called 'bags' to capture prey, including spiders and insects.
The study found that physical changes caused by damming have a disproportionate adverse effect on native fish, which are more vulnerable due to their life history differences. The researchers suggest recreating the high-flow, sediment-rich waters of the Colorado River to reverse the decline in native species.
Researchers at NYU found that photoreceptors in an insect's eye change their traditional color detection roles during metamorphosis. The study used the fruit fly Drosophila as a model system to understand biological processes like vision.
A parasitoid wasp induces its moth caterpillar host to stop feeding, remain close to the pupae, and defend against predators, resulting in increased pupae survival. The caterpillar's behavioral changes appear to outweigh potential risks of increased transmission for the parasite.
Researchers report transformation of y-larvae into a previously unseen parasitic form, challenging current understanding of crustacean taxonomy. The discovery highlights the potential ecological importance of adults in this enigmatic group.
Researchers have discovered a timing mechanism in the brain of fruit fly larvae that controls their avoidance of food and could lead to new pain relief methods. This mechanism has counterparts in mammalian models involved in psychological processes such as food response, anxiety suppression, and pain perception.
Researchers have discovered a new mechanism of infection for American Foulbrood, the deadliest bee disease, allowing for potential prevention and control measures to be developed. The study provides a better understanding of pathogen-host interactions, crucial for combating infectious diseases in honeybees.
A two-year study is underway to collect data on ichthyoplankton in the St. Johns River, aiming to predict vulnerability to water withdrawals and environmental changes.
Larval sand dollars use cloning as a survival mechanism to reduce size and visibility to predators when threatened. By creating clones, they increase chances of survival by having multiple individuals, but this may come at the cost of reduced size later in life.
A recent study by NOAA scientists suggests that changes in ocean-atmosphere conditions may be a primary factor in declining European eel reproduction and survival rates. The North Atlantic Oscillation is believed to be a key driver of these changes, which can impact the development of glass eels, the juvenile stage of the eel population.
A new research tool, OWNFOR, will enable scientists to study how tiny coral reef fish larvae locate their habitat across vast expanses of water. The system uses a drifting observational device with an infrared camera to observe marine larvae naturally influenced by ocean currents.
Researchers discovered that insect larvae can detect and respond to non-pathogenic bacteria in their diet, triggering an immune response. This reaction affects pupation time and mass, highlighting the trade-offs of a balanced diet for insects.
Researchers found that vacuuming is an effective way to kill fleas, with a high success rate in killing adult fleas (96%) and destroying younger stages (100%). The study suggests that the physical abuse caused by the vacuum's brushes and fans leads to flea death.
Researchers discovered the essential design features of coiled coil silks in bees, ants, and wasps, which are produced by larvae using different methods. The unique protein structure produces a lightweight yet tough silk, likely contributing to the social insects' evolutionary success.
A new light trap design has led to the discovery of a new species of goby, with DNA barcoding technology confirming its unique genetic profile. The capture of larvae using the innovative trap provided access to previously inaccessible species, shedding new light on marine biodiversity.
Consumers eating raw fish may be at risk of intestinal parasitic infection Anisakiasis, which can cause sudden abdominal pain, nausea, and vomiting. Diagnosed by endoscopy or imaging tests, the condition is often treatable with fluid replacement and rest.
Research by NSW DPI has identified the Whitefringed weevil larvae as the culprit behind small holes in leaky irrigation pipes. The larvae can chew through plastic piping using their dark brown pincers, leading to significant yield loss and water waste for lucerne growers.
Researchers will use a novel technique to track the dispersal of coral reef larvae and assess the effectiveness of marine protected areas in protecting fish stocks. The new approach, known as TRAnsgenerational Isotope Labeling (TRAIL), involves introducing an artificial tag into mature female fish just before spawning.
Researchers at the University of Leeds discovered that leaf-cutting ant larvae can switch development based on environmental stimuli and colony needs. This flexible genetic coding allows colonies to adapt to changing workforce demands.
Research reveals that rare genetic variants in fruit flies can provide a survival advantage, with individuals with unique traits being less conspicuous to predators. The study's findings offer insights into why genetic variation persists in nature and may have implications for understanding human food-related disorders.
Oyster larvae are attracted by adult scent but face a nearly 90% death risk if caught by cannibalistic adults. Despite this, more than 95% of an oyster reef is safe for larvae settlement, driving the evolution of gregarious settlement cues.
Scientists have found that a group of sea snails can regain the lost larval stage, breaking Dollo's Law. This discovery suggests that animals may carry the potential for evolutionary change around with them.
Researchers at Salk Institute discovered a 2-step mechanism for cilia to agree on direction, enabling directional fluid flow. Cilia refinement phase ensures coordinated movement of up to 200 cilia per cell.
Researchers at Purdue University have discovered genes in wheat that neutralize toxic compounds produced by the Hessian fly larvae, making them vulnerable to attack. The study provides insight into the biochemical mechanisms involved in insect-plant interactions and may lead to novel strategies for enhancing wheat resistance.
A newly identified wheat gene produces proteins that bind to the stomach lining of Hessian fly larvae, causing them to starve. The gene's role in creating resistance to Hessian flies was a surprise to researchers, who found that it triggers a localized defense response that reduces energy costs for the plant.
New research from MBL reveals that some fish larvae can discriminate odors in ocean currents and use scent to return to their birthplace. This homing behavior could support population isolation and genetic divergence, leading to the formation of new species. The study suggests that smell plays a crucial role in guiding larvae back to t...
A new study from the University of North Carolina at Chapel Hill found that ocean temperature affects the distance marine larvae travel before maturing. This discovery has significant implications for managing commercially important or invasive species.
Male crickets sing less and for longer in autumn due to parasitic fly presence, while females are reluctant to approach singing males. This finding sheds light on the interplay between sexual selection and natural selection.
A team of biologists at the University of California - San Diego has identified 27 different Tweedle genes in fruit flies, which they believe strengthen the cuticle. This discovery could lead to novel insecticides as the gene family appears to be unique to insects.
Researchers discovered that Antarctic midge larvae continuously produce heat-shock proteins to withstand environmental stresses, whereas adult midges only express these proteins during extreme stress. This unique mechanism offers the larvae protection and allows them to thrive in Antarctica's harsh conditions.
Researchers used carnivorous pitcher plant food webs to study habitat loss effects on species abundance. Trophic interactions, such as predator-prey relationships, dominated abundance predictions, unlike previous modeling frameworks that relied on habitat contraction or keystone species effects.
Researchers used a genetic tool to activate specific neurons in fruit flies, revealing that two subsets of neurons are responsible for assigning positive or negative values to stimuli. This discovery advances our understanding of how animals learn to associate cues with experiences and has implications for more complex mammalian brains.
A new computer model combines ocean current simulations and genetic forecasting to predict coral reef ecology and animal dispersion patterns. The model was tested with empirical data from threatened staghorn corals, showing successful predictions of genetic patterns on a regional scale.
Researchers found sulfur-eating bacteria infect giant tubeworm larvae through their skin, not stomach as previously thought. The bacteria then induce tissue differentiation to form the trophosome, a specialized organ housing the symbionts.
Researchers found that caterpillars respond to variations in plant volatile production to reduce encounters with parasitic wasps. The study demonstrates that plant volatiles, rather than light, control the daily behavior of caterpillars.
A recent study reveals that wasp helpers are more likely to take risks when they have a better chance of becoming the next queen or breeder. Brighter wasps face a fundamental trade-off between helping and ensuring their own survival, ultimately leading them to become lazier as their future reproductive success increases.
Research reveals that fish larvae can't maintain a horizontal body position while coasting, leading to increased drag and poor swimming abilities. This conclusion refutes previous theories on poor hatchling swimming, providing new insights into pectoral fin development and swimbladder formation.
Researchers analyzed the fatty acid composition of Blue Morpho butterflies and their larvae to discover that the transformation from larva to butterfly drastically reduces total fatty acid content. This significant loss in body fat may be essential for the health and survival of the butterfly during metamorphosis.
A new study found that rapid larval growth in warm Caribbean waters is often disrupted by complex oceanographic processes, leading to variable settlement rates. Understanding these dynamics is crucial for managing and conserving fish populations.
The article discusses Nicol's model of krill's life history, which separates the species into different stages and explains how it drives its evolution. The study reveals that this life cycle keeps adult krill separate from younger stages, reducing competition for food and minimizing predation on juveniles.
University of Washington researchers found a gland in fruit flies that assesses the fly's size and sends hormonal signals to initiate metamorphosis. By genetically manipulating the prothoracic gland, scientists could alter the size at which the fly would reach adulthood, providing new insights into an organism's growth process.
Insects use unique postures and forces to propel themselves up steep, slippery menisci in water. Researchers found two species of water treaders create dimples in the surface with their legs, generating forces that suck them up the slope.
Female California fiddler crabs check out 100 or more male crab candidates and burrows before choosing a mate due to the importance of burrow size for offspring survival. This picky behavior helps females select mates with suitable burrows that allow larvae to hatch at the safest time.
Researchers found that parasitic fly larvae alter tiger moth caterpillar taste organs, favoring toxic plants containing protective chemicals. This change in behavior helps caterpillars escape parasites and survive.
A study by Penn State researchers found that invasive brushy honeysuckle hybridized with the Rhagoletis pomonella fruit fly, creating a new insect species. The discovery suggests that hybridization is a common mechanism for speciation in animals, similar to what occurs in plants.
Researchers tracked coral reef fish larvae using DNA paternity analysis and marking with tetracycline, finding that one third settled within a two-hectare area near their birth site. This study documents the smallest scale of dispersal for a marine fish species, providing insights into sustainable marine reserve management.
Researchers found that disabling a specific gene in fruit flies causes premature maturation, leading to small and misshapen adults. This study provides insight into the genetic mechanisms controlling human development from childhood to adolescence.
Scientists have made a serendipitous discovery that lobster larvae are settling on open water fish cages in Puerto Rico by the thousands. This finding has led to a new program aimed at making large-scale spiny lobster culture commercially feasible, which could address limited availability and high value of the species.
Researchers have discovered that older fish produce exponentially more larvae, which are crucial for the survival and growth of younger fish. Removing these older fish can lead to a 'Darwinian debt' for future generations, where evolutionary damage is difficult to repair.
Researchers at NYU found that pacemaker neurons transmit signals to target cells and modulate light sensitivity, generating a circadian rhythm in visual sensitivity. This discovery may lead to the identification of genes that can be used to treat sleep disorders and jet lag.
A diverse network of marine protected areas may be essential for restoring depleted groundfish stocks. Older fish produce more eggs with increased survival chances for larvae, which can grow faster and survive starvation longer.