Articles tagged with Crustaceans
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Researchers found that climate change can have both positive and negative effects on eelgrass meadows, depending on the presence of small algae-eating crustaceans. Without these crustaceans, higher water temperatures and ocean acidification pose a greater threat to the ecosystem's survival.
New research reveals that invasive green crabs are helping to restore Cape Cod's distressed salt marshes by filling the void left by declining native predators of sesarma crabs. The study found that green crab presence had a significant deterrent effect on sesarma herbivory, allowing grass regrowth in areas previously depleted.
A recent genetic study of tadpole shrimps reveals that these organisms are much younger than previously thought, with some species evolving in the past 25 million years. The research challenges the term 'living fossil' by showing that these ancient crustaceans have undergone periods of radiation and extinction.
These tiny crustaceans feed on nuisance algae that grow on seagrasses, helping to maintain healthy seagrass beds and provide nurseries for commercially important fish and shellfish. Grazers also serve as a food source for larger animals in the ecosystem.
Researchers found that the sticky nature of opaline, not its chemical composition, is responsible for reducing sensory responses in lobsters. The study suggests that sea hares can escape predation by using opaline to inactivate a lobster's sense of smell and ability to feed.
Researchers found that ship noise increases crab metabolic rate, indicating elevated stress, and larger crabs are affected most strongly. This study highlights the importance of reducing noise in busy shipping areas to protect commercially important crustacean species.
Researchers found that warmer ocean temperatures weaken mussels' fibrous threads, making them more prone to detachment. This can have cascading effects on the marine food web and commercial mussel farming.
Experts from Spain have discovered a new genus of crustacean, Triodonthea, and five new species within the Lauriea genus in the Pacific and Indian Oceans. These species are genetically distinct but morphologically similar, with some being endemic to specific regions.
Research reveals that recreational fishing and Great Depression-era ditches are causing significant erosion and die-off of cordgrass habitat in Cape Cod salt marshes. The unchecked growth of purple marsh crabs has led to the destruction of this essential ecosystem, threatening the region's ecological balance.
A study found that common shore crabs are willing to trade a valued shelter to avoid future electric shock, suggesting they experience pain. The research highlights the need for better treatment of crustaceans in food industries like aquaculture.
A new species of hermit crab, Areopaguristes tudgei, has been discovered on the barrier reef off the coast of Belize by American University biologist Christopher Tudge. The species was named in his honor due to his unique contributions to knowledge of hermit crab reproductive biology.
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.
Scientists tracked the movements of 55 male robber crabs on Christmas Island for over three months, recording more than 1,500 days of activity. The data showed that the crabs used a combination of path following and homing to navigate, with long-distance movements possibly related to mating, foraging, and saltwater drinking.
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 520-million-year-old fossilized arthropod has revealed a remarkably well-preserved brain structure, challenging the long-standing debate on the origin of insects. The discovery suggests that complex brains evolved earlier than previously thought and have changed little over time.
Researchers have successfully unraveled the life cycle of Hematodinium, a single-celled parasite affecting blue crabs. The study provides critical information on transmission and development time, enabling better management and handling practices for wild-caught blue crabs and shrimp farms.
Tadpole shrimp have been identified as a new pest of rice production systems in the midsouthern United States. The shrimp feed on rice seedlings and uproot them during foraging, causing water to become muddy and reducing light penetration.
Researchers discovered Arctic crustaceans migrate below sea ice during winter nights, using deep-ocean currents to reach colder areas. This adaptation increases survival and enables them to remain in the Arctic Ocean, a key finding that challenges previous perceptions of ice fauna's vulnerability.
Researchers have discovered a small crustacean, Ankylocythere sinuosa, living on invasive red swamp crayfish in Europe. The finding suggests that the crustacean may have arrived with the crayfish 30 years ago and could potentially impact native species.
A Nova Southeastern University study reveals that deep-sea crabs have eyes sensitive to ultraviolet light, allowing them to distinguish between toxic corals and edible plankton. The crabs use their sensitivity to blue and ultraviolet light to color-code their food.
Researchers discovered that deep-sea creatures produce mostly blue and blue-green light, with some species emitting green spectra. They found that these animals have incredibly sensitive color vision, which may be used to detect and distinguish between food sources.
Researchers found Hematodinium sp. and its sister species are a major problem for crab fisheries, causing 'bitter crab' disease. The parasites have bacteria-like endosymbionts that increase their chances of survival outside the shrimp, leading to significant damage to infected crustaceans.
Researchers discovered that deep-sea crabs can detect shorter wavelengths of light, including ultraviolet and blue light, allowing them to identify toxic corals and distinguish between edible plankton. This sensitivity may enable the crabs to color-code their food using UV vision.
Dr. Keith Crandall's research in the journal Ecology and Evolution found that Cerataspis monstrosa is a larval stage of the deep-water aristeid shrimp Plesiopenaeus armatus. The discovery sheds light on biodiversity and life history of the organism.
Climate change is expected to lead to a major ecological upheaval in Antarctica as predatory king crabs potentially invade the continental shelf. The invasion could disrupt the primeval marine communities that have lived there for millions of years, leading to a loss of unique biodiversity.
Hermit crabs have an underdeveloped sense of smell compared to vinegar flies, but humidity enhances their olfactory system. They primarily respond to water-soluble polar odorants like acids and aldehydes.
Researchers from NTU discovered a unique composite structure in mantis shrimp clubs, yielding a material tougher than many engineered ceramics. The findings aim to solve problems with damaged hip implants, bone loss, and toxicity caused by metal implants.
Research by Brown University ecologists finds that recreational fishing causes a trophic cascade, leading to the collapse of salt marshes along Cape Cod. The absence of top predators allows Sesarma crabs to overgraze, causing ecosystem decline.
Researchers have discovered a highly complex structure in the mantis shrimp's club that enables it to withstand 50,000 high-velocity strikes. The unique structure could inspire new materials for military body armor, vehicle frames, and aircraft frames, reducing weight while maintaining impact resistance.
A new invasive species of sea crab, Dyspanopeus sayi, has established itself in the Western Mediterranean Coast, particularly in the Ebro Delta. The crabs are well-established and reproducing in the area without problems, with both sexes captured along with ovigerous females carrying eggs.
Researchers found that coral-dwelling crabs and snapping shrimp are more effective when fighting together than alone, with a 65% reduction in coral eaten by two pairs of crustaceans compared to one pair. This phenomenon, called the Multiple Defender Effect, highlights the importance of biodiversity in ocean conservation.
Shrimp fishermen are assisting biologist Kai Wätjen in monitoring rare fish species in the North Sea. They are using cameras to document catches and a data logger to record water temperature and depth information.
A study found that arthropods and crabs were vulnerable to the BP Deepwater Horizon oil spill but recovered within a year if host plants remained healthy. Salt marsh ecosystems showed resilience despite oil exposure.
A University of Houston study found that arthropods in coastal salt marshes affected by the 2010 BP oil spill experienced reduced populations due to oil exposure, but recovered within a year if host plants remained healthy.
Scientists have revealed the world's deepest known 'black smoker' vents, which may be hotter than 450 °C and are home to thousands of a new shrimp species. The discovery suggests that deep-sea vents may be more widespread around the world than previously thought.
A team of scientists has discovered communities of previously unknown species on the seafloor near Antarctica, clustered in hot, dark environments surrounding hydrothermal vents. The findings include new species of yeti crab, starfish, barnacles, and potentially an octopus.
Genoveva Gonzalez Mirelis analyzed over 2 million map tiles in Kosterhavet National Park to create a spatial distribution of benthic communities, including deepwater corals and Norway lobster. This method can help preserve environments and species for future generations by informing marine planning and regulations.
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.
Researchers found that several native fish species have incorporated the bloody red shrimp into their diet over multi-seasonal periods. The study suggests these fish are adapting to the invasive species, alleviating concerns about its impact on native populations.
A study on Lysmata amboinensis shrimp found that larger groups than pairs experience violent attacks and kills, with smaller groups remaining intact. Monogamous pairs emerge after aggression subsides, with reduced group sizes resulting in increased molting rates.
A new study reveals that the diversity of organisms living on coral reefs is much greater than previously thought, with 525 species of crustaceans found in a small sample area. This underestimation highlights the need for further research and conservation efforts to protect these endangered habitats.
Astrophysicists with VERITAS detect pulsed gamma rays above one hundred thousand million electron volts, defying current pulsar models. The finding is causing researchers to consider new theories about gamma-ray production.
Researchers have discovered gamma rays with unprecedented energies from the Crab Pulsar in the Crab Nebula, contradicting existing theories. The findings suggest a different mechanism for producing these high-energy particles, which could be detected by the VERITAS observatory.
The Crab pulsar generates beams of radiation from its spinning magnetic field, detected as rapid pulses of gamma-ray radiation. Researchers have detected these pulses with unprecedented energies, exceeding 100 billion electron-volts, putting new constraints on the mechanism for how this emission is generated.
A team of astrophysicists has detected pulsed gamma rays from the Crab Nebula with energies up to 400 billion electronvolts, far exceeding previous detection limits. The high-energy emission challenges existing pulsar models and may require significant adjustments to our understanding of these extreme systems.
Scientists have detected pulsed gamma-ray emission from the Crab pulsar at energies far beyond what current theoretical models can explain. The VERITAS telescope array detected gamma-rays with energies exceeding 100 billion electron-volts, putting new constraints on the mechanism for how the gamma-ray emission is generated.
Researchers detected high-energy gamma rays from the Crab Pulsar system, which cannot be explained by current models. The observations exceed 100 billion electron volts, shedding new light on pulsars and their behavior.
Researchers found that invasive species like the European green crab may have a major advantage when starting at the upstream edge of their range, particularly in environments with strong prevailing directions of water or wind currents. This can help inform control efforts and conservation strategies for native species.
A NASA team will attempt to send a balloon with an instrument payload to measure gamma rays from the Crab Pulsar, 6,500 light years away. The mission aims to study the polarization of gamma rays, which can provide clues about the source's mechanism.
A team of scientists, including students from the University of Miami Rosenstiel School, studied the sounds of California mantis shrimp to understand their communication methods. They found that males made rhythmic 'rumbles' in groups of three to attract females and defend territories.
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 USGS-led study found that the population health of the red knot is directly tied to the number of egg-laying horseshoe crabs in Delaware Bay during the red knot's northward migration each spring. The research suggests that managing horseshoe crab populations and their harvest may help conserve red knots.
Researchers have developed a novel waveplate technology inspired by the peacock mantis shrimp's eye, which can improve high-definition CD, DVD, and holographic technology. The new waveplates offer broader polarized light capabilities over the entire visual spectrum.
A recent study reveals that international seafood markets are overfishing Madagascar's waters, leading to a decline in key species groups such as shrimp, shark, and sea cucumber. The impact on local food security is significant, with two-thirds of the population facing hunger.
A Canadian study found that flexibility in mating rituals is crucial for reproductive success when males outnumber females. Researchers analyzed hundreds of investigations on mating trends across various species, finding significant flexibility in mating behavior and customs.
Researchers at UW-Madison discovered that liquid crystal droplets change ordering in response to low concentrations of endotoxin, a bacterial lipid. This defect-driven phenomenon offers a highly sensitive detection method for bacterial contamination.
Researchers describe a new species of land crab that documents the first crab extinction during the human era, likely caused by the arrival of humans to the Hawaiian Islands. The loss of the crab had a significant impact on the ecology of the islands.
Researchers identified a gene responsible for male production during environmental sex determination in Daphnia. The study suggests an ancient connection between genetic and environmental sex determination mechanisms.
The genome sequence of Daphnia pulex, a small freshwater crustacean, has revealed neurotrophins that suggest the nervous system of crustaceans is more complex than previously believed. This finding may have implications for understanding the impact of climate change on crustacean behavior.
Mass trilobite burials record communal behaviors similar to those in modern crustaceans, including molting, mating, and migratory queues. These 'geologic snapshots' preserve life position and molted exoskeletons, providing evidence of rapid burial and minimal disturbance.