Articles tagged with Crustaceans
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Scientists from the Smithsonian Tropical Research Institute have discovered a new species of mud-shrimp, Strianassa lerayi anker, and a highly mobile clam, in Panama's Coiba National Park. The discovery is part of a larger project to better understand the role of microbes in shaping tropical ecosystems.
A 429-million-year-old trilobite fossil's internal structure reveals similarities with modern bee eyes and compound eyes of crustaceans. The findings suggest that vision principles in these insects have remained largely unchanged since the Palaeozoic era.
A researcher at the University of Texas at Arlington is using Daphnia, or water fleas, to study the long-term evolutionary impacts of nuclear testing. By hatching decades-old eggs and measuring their viability and traits, Matthew Walsh aims to understand how nuclear-induced mutations affect generations of water fleas.
A new study found that five different types of seafood - oysters, prawns, squid, crabs, and sardines - contain plastic, with varying levels of pollution. The research used a newly developed method to identify and measure five different plastic types, revealing surprising differences in the amount of plastic present among species.
Climate change is fueling the rapid expansion of invasive species like the Asian shore crab into previously unknown habitats. This study finds that climate warming can predict the speed and extent of these invasions by examining the early developmental stages of larvae, which are often more vulnerable to environmental fluctuations.
Research finds microplastics in deep-sea shrimp do not affect their health, despite high concentrations. The study suggests that shrimp can eliminate ingested fibers through exoskeleton shedding.
Researchers at the University of New Hampshire have identified a quicker and less expensive way to count sperm in lobsters using DNA technology. This new method could help scientists better understand mating and population sustainability in various species.
Two new species of parasite have been discovered in crabs, which could potentially harm commercially important crustaceans. The researchers' findings suggest that the shore crab's habitat may influence the presence and prevalence of pathogens.
A new study reveals how climate change has enabled Sesarma reticulatum to thrive in southern salt marshes, dramatically altering ecosystem dynamics and clearing grasses that hold the marshes together. This has led to increased rates of creek formation and changes in interactions between predators and prey species.
A species of crab, Sesarma reticulatum, is reshaping the landscape of marshlands in the southeastern US. The crab's burrowing and grazing activities lead to erosion of creek heads, accelerating marsh drainage and altering ecosystem dynamics.
Researchers have developed a sustainable method to recover valuable nutrients from shrimp processing water, including protein and lipids, for use in food or feed. The technique combines food-grade flocculants with dissolved air flotation, capturing up to 98% of the protein present in the water.
Researchers found that microplastic fibers impact lobster larvae's feeding and respiration. Young lobsters accumulate fibers under their shells, while older larvae ingest particles but keep them in their digestive systems.
A team of scientists designed a discontinuous fibrous Bouligand architecture to create exceptional fracture toughness and crack orientation insensitivity. The study reveals the origin of biomimetic microstructures for high-performance advanced composite materials.
Two new tanaid species were discovered by NUS researchers in the eastern Pacific Ocean, providing insights into biodiversity in the Clarion-Clipperton Zone. The discovery is significant for environmental management, as it sheds light on the ecosystems and potential resource areas of this understudied region.
A new study finds that sea otter recovery generates significant economic benefits, including increased tourism and carbon capture, which outweigh the losses to commercial fisheries by up to $46 million annually. However, the costs of recovery are not evenly distributed, with Indigenous communities experiencing disproportionate impacts.
Researchers project that American lobster will move further offshore and sea scallops will shift north in the coming decades. The study's findings pose fishery management challenges as changing habitats can impact where species can be caught and who has access to them.
Researchers have successfully detected gamma rays from the Crab Nebula using a next-generation telescope, shedding new light on supernovae and dark matter. The prototype Schwarzschild-Couder Telescope promises to enhance imaging detail over larger field of view across the sky.
Engineers produce high-impact multilayered coatings using chitin from shrimp, mushrooms, and other organisms, which can protect against bullets, lasers, toxic gas, and other dangers. The coatings aim to be biodegradable by design, reducing environmental impact.
A new study suggests that operating with fewer traps and a shorter season in the US lobster fishery may be more profitable for fishermen while also protecting endangered North Atlantic right whales. The research found that Massachusetts fishers have caught more lobster since implementing a three-month fishing closure, while Maine's lob...
A study recorded spiny lobster antennal rasps at distances of up to 400m, with large individuals detectable up to 3 km away in low-noise conditions. This non-invasive tool helps monitor and survey populations of vulnerable spiny lobsters.
New research finds that virus infection rates in lobsters are related to their habitat, with seagrass meadows showing a protective effect against the spread of disease. The study's findings support efforts to safeguard Caribbean spiny lobster populations and boost understanding of viral dynamics.
Researchers have developed a test to identify lobster hybrids resulting from crossbreeding between European and American lobsters, posing a potential threat to conservation efforts. The study highlights the importance of genetics in distinguishing hybrid lobsters that may spread unwanted genes across native populations.
A recent study found that North Atlantic right whales are in poorer body condition than Southern right whales, likely due to vessel strikes, entanglement in fishing gear, and changes in food supply. This decline affects the species' reproduction, growth, and survival.
Research reveals North Atlantic right whales are in poorer body condition than Southern right whales, affecting reproduction and growth rates. The study suggests lethal vessel strikes, entanglement, and food scarcity contribute to their decline.
Researchers found that mantis shrimps rely on external cues from the sun, followed by polarization patterns in light, before using their internal navigation system when other options are unavailable. These findings provide new insights into the complex behaviors of these fascinating creatures.
Researchers found that lobsters in Sardinia can eat and break down larger plastic particles, releasing smaller fragments into their intestines. These tiny particles, or "secondary" microplastics, could be more bioavailable to smaller creatures in the deep-sea food chain.
A new clinical test uses sustainable harvesting of horseshoe crab amebocytes to save human lives and spare at-risk population. The method enables fast, affordable, and precise tests on specially treated human blood.
Researchers discovered remains of various marine animals in a Portuguese cave occupied by Neanderthals between 106,000 and 86,000 BCE. This finding suggests that many Neanderthal groups shared similar dietary habits, contradicting the common perception of them as cold-climate hunters.
Researchers have developed a mini movie theater to measure the color spectrum visible to fiddler crabs, revealing their ability to discriminate between different wavelengths of light. The device uses blue and green light-emitting diodes and tilted screens to stimulate the crabs' reaction.
A new study found a dramatic increase in the global abundance of Anisakis worms, also known as herring worms, which can be transmitted to humans through raw or undercooked seafood. The parasite's rise could have implications for human health and marine mammal populations.
Researchers found elevated concentrations of TPT in Chinese white dolphins and finless porpoises, with the highest concentration being five times higher than reported in false killer whales. Biomagnification of TPT compounds has significant implications for local dolphin populations and human health.
Researchers found that ship noise weakens shore crabs' ability to change shell color and respond to danger. The study shows that even for animals not primarily using sound, noise pollution can impact survival behaviors.
Research shows that ship noise affects shore crabs' ability to change color and behave normally, reducing their camouflage effectiveness. The study found that juvenile crabs exposed to ship noise changed color half as quickly, making them less camouflaged.
Research shows that West Coast Dungeness crab numbers are stable or increasing, with Central California catches averaging five times those of past decades. The fishery's success may be attributed to fishing regulations protecting reproductive potential and natural variability in ocean conditions.
A new study reveals that crustaceans like shrimps and lobsters have a similar brain structure to insects, called mushroom bodies, which are essential for learning and memory. This discovery challenges the long-held belief that these structures are unique to insects.
Researchers found that mantis shrimp's hammer blows are significantly weaker in air compared to water, with forces averaging only 18 km/h. The crustaceans may be downgrading their attacks to avoid joint damage and injury.
Researchers found that warmer waters increase the frequency and intensity of snapping shrimp sounds, which could dominate coastal ocean soundscapes. This might impact fish communication, human sonar instruments, and even Navy mine detection systems.
When provided with a reliable shrimp dinner, cuttlefish eat fewer crabs during the day, showcasing selective foraging behavior. They adapt quickly to changes in their environment by leveraging past experiences and adjusting their strategy accordingly.
A new study found that record-breaking whale entanglements in the Pacific Northwest were triggered by a unique marine heatwave, known as the 'Blob', which altered fish populations and habitats. The research has led to the development of online tools to help fishermen avoid entanglement risks.
A recent Portland State University study found that sand crabs' adult mortality increases and reproductive success decreases when exposed to plastic microfibers. Microplastic exposure also affects embryonic development rates, potentially impacting higher trophic levels in the food chain.
A new species of prehistoric scorpion, Parioscorpio venator, is discovered with characteristics similar to present-day scorpions and horseshoe crabs. The fossils suggest that scorpions may have adapted to life on land earlier than previously thought, possibly using similar pathways as modern horseshoe crabs.
Two hermit crab species, Coenobita rugosus and C. perlatus, coexist on the same beaches by selecting differently shaped shells as their homes. The study found that C. rugosus prefers short, spherical shells, while C. perlatus prefers elongated shells with a narrow opening.
Cuttlefish use stereopsis to estimate depth of prey, striking at it with tentacles after coordinating eye movement. This process is similar to that of vertebrates, challenging the understanding of cephalopod visual processing.
Researchers investigated how cuttlefish determine the best distance to strike moving prey and found that they use stereopsis to perceive depth. The study revealed that cuttlefish brains are significantly different from humans in processing vision, with a unique area comparing images from both eyes.
Astronomers use NASA's Great Observatories to create a three-dimensional representation of the dynamic Crab Nebula, an exploding star. The visualization highlights the pulsar at the heart of the nebula and its intricate structures.
Researchers found identical structures in horseshoe crab and ancient sea scorpion eyes, suggesting contrast enhancement evolved over 400 million years. The findings shed light on the evolution of compound eyes in arthropods.
The University of Stirling has launched a pioneering tool to minimize environmental and occupational health risks in shrimp farming. The Pedigree project aims to bring research into practical use, providing a 'traffic-light system' to differentiate riskier from higher-quality probiotic products.
Researchers have discovered a new fossil species of comma shrimp in Colombia, filling a 160 million-year gap in the evolution of these crustaceans. The fossils, which include hundreds of individuals, are remarkably well preserved and provide insights into the origins and relationships of these marine arthropods.
Researchers found a 'kidney-shaped' brain region that processes and integrates visual information with other sensory inputs. This discovery sheds new light on how mantis shrimp make sense of their breathtaking visual input.
Researchers have discovered that peacock mantis shrimp prefer the taste of white meat over red tissue from disco clams, suggesting that color may not be a warning signal. The study aims to determine whether mantis shrimp can learn to fear the color red and its potential role in evolution.
Researchers found 13.6% of shore crabs infected with Hematodinium parasite, highest rates in spring and male crabs. Environmental DNA analysis revealed early stages of parasite development not present in crabs.
Two new studies analyze the role of warming oceans and local conditions in shaping lobster populations, suggesting a period of decline for the Gulf of Maine fishery. The American Lobster Settlement Index provides an accurate prediction of lobster abundance four to six years later.
Researchers at Swansea University found that common shore crabs can learn the path of a maze to find food and recall it two weeks later. The study showed significant improvement in navigation time and accuracy over four weeks.
Two new porcelain crab species, Polyonyx socialis and Petrolisthes virgilius, have been discovered in the South China Sea and Colombian Caribbean. The species exhibit unique symbiotic relationships with other organisms, highlighting a long-term story of coexistence between distantly related taxa.
A new tool has been developed to help manage the Nova Scotia lobster fishery in the face of climate change. The tool incorporates projected changes in ocean climate onto a geographic management area, enabling fishermen and resource managers to plan for future sustainability.
A 150-million-year-old coral reef snapshot reveals a peak of diversity among marine animals, including fish, crabs, and snails. The study also finds evidence of parasites among these ancient creatures, shedding light on the complex ecosystems of the past.
Researchers at the University of Minnesota have discovered a new way animals can modify their vision, found in the photoreceptors of larval mantis shrimp. The structure resembles a human-made optical device and may help the mantis shrimp larvae see bioluminescence.
A study by the University of Bonn found that parasitic worms, such as Pomphorhynchus laevis, use bright orange coloring to attract specific host fish like barbels and sticklebacks. This strategy increases infection rates in these species, which are suitable for the parasite's reproduction.
Researchers at the University of Bristol discovered that fiddler crabs separate polarisation and brightness channels to detect approaching objects. This method provides a greater range of information for the crab, with polarisation offering a more reliable source of information than brightness in detecting predators.
Researchers predict that warmer winters in the Chesapeake Bay will lead to longer and more productive blue crab seasons. As water temperatures rise, blue crabs' overwinter survival is expected to increase by at least 20%, potentially extending their season year-round.