Articles tagged with Bivalves
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Researchers discovered a common parasite of modern oysters has been infecting bivalves for hundreds of millions of years. The parasite, belonging to the spionid group, has remained largely unchanged despite multiple mass extinction events.
Researchers developed a composite bioabsorbable hemostatic sponge inspired by mussels and extracellular matrix. The sponge quickly absorbs blood and firmly adheres to tissues, enhancing hemostatic performance. It promotes wound stabilization, accelerates blood clotting, and reduces inflammation and tissue damage.
A team of scientists analyzed fossilized clams and mussels to understand how ecosystems recover from mass extinctions. They found that despite 75% species loss, ecological niches remained occupied, contradicting prevailing theories.
Researchers studied pumice rafts from the 2021 Fukutoku-Oka-no-Ba eruption in Japan, finding three phases of evolution involving rounding, fragmentation, and biodiversity increase. The study provides valuable information for mitigating the impact of future eruptions on shoreline communities.
Researchers at Osaka Metropolitan University have developed polyethylene rafts that are about five times more durable than traditional bamboo rafts used in oyster farming. The new rafts are designed to be affordable and can withstand harsh weather conditions, reducing damage from typhoons.
A new study reveals a previously unknown galeommatoidean bivalve species, Brachiomya ducentiunus, found attached to sea urchins in False Bay's kelp forest. The discovery expands our understanding of marine biodiversity and ecological interactions.
Rutgers scientists found thriving and growing surfclam populations off the coast of Virginia, with characteristics similar to those in New Jersey. The study suggests improved environmental conditions or adaptation may be responsible for the rebound.
A new study used underwater cameras to assess oyster reef habitats across 12 tributaries in the Chesapeake Bay, finding that unharvested reefs and restored reefs had more complex structures. The results showed an upward trend in habitat scores over time, with unharvested and restored reefs maintaining higher habitat scores consistently.
Researchers at Kyoto University have found three new species of animals living together in harmony with worms in dead coral rocks. The discovery highlights the importance of community structure and biodiversity patterns in cryptofauna, suggesting that symbiotic relationships are omnipresent in the ocean.
Researchers have sequenced the genomes of Scaphopoda, a rare and understudied mollusk group. The study provides new insights into early Molluscan evolution, resolving a long-standing debate on the phylogenetic placement of Scaphopoda.
Research revealed that both brachiopods and bivalves shared similar trends in diversification dynamics during the Permian-Triassic mass extinction. The study found that bivalves eventually prevailed due to better adaptation to high ocean temperatures, while brachiopods retreated to deeper waters.
Researchers at Florida Atlantic University uncover the finer-scale feeding patterns of the whitespotted eagle ray, revealing a significantly broader diet than previously described, with high proportions of cockles and wedge shells. The study's findings suggest that these rays can play a facilitative role in reducing predation threats f...
Researchers discovered that a bivalve's hinge can withstand 1,500,000 cycles without fatigue damage. The team proposed a novel design strategy based on the hinge's hierarchical structure to create fatigue-resistant materials.
A 15-year study by University of Virginia researchers shows that restored oyster reefs can match natural reef populations in about six years and continue to thrive thereafter. The study's findings suggest that restoration can catalyze rapid recovery of imperiled coastal habitats and help reverse decades of degradation.
A new study found that aquaculture and fisheries have led to the loss of biodiversity along China's 18,000 km long coastline, with commercially exploited species dominating all regions. The study discovered that the uniformity of bivalve species is largely due to human activities, including intensive fishing practices.
Researchers used fossil records to estimate extinction risk in marine bivalves, finding that many harvested species are widespread and tolerant of environmental changes. However, the study highlights the need for more complete data on human impact to inform conservation efforts.
Researchers discovered a new ichnospecies, Karethraichnus zaratan, living on the carapace of an extinct marine turtle during the Late Cretaceous period. The species is believed to be a bivalve that formed symbiotic relationships with its host, revealing new insights into ancient paleoecology and evolution.
The discovery of pebble-shaped teeth in the fossil of Cartorhynchus lenticarpus, an early ichthyosaur species, sheds light on how these animals adapted to their environments. The unusual rounded teeth, likely used for crushing shells, suggest that smaller ichthyosaurs like Cartorhynchus lived closer to shore and fed on invertebrates.
A new study of fossil mollusk shells from the late Cretaceous period found that a day lasted 23.5 hours, with ocean temperatures reaching up to 40 degrees Celsius in summer and exceeding 30 degrees Celsius in winter. The ancient shell revealed unprecedented detail about the animal's growth rate and water conditions.
Researchers have created a mathematical model that explains how the interlocking edges of oyster shells develop physically, revealing a complex interplay between geometry and mechanical forces. The study suggests that a toothed or wavy edge occurs when the mantle grows faster than the shell edge, causing it to buckle.
For the first time, Guyanella clenchi has been reported from Abrolhos Bank, Brazil, shedding new light on the interaction between marine fauna from the Caribbean and Southern Atlantic regions. The discovery provides key data for understanding biogeography and improving knowledge of molluscs inhabiting the Brazilian coast.
Research finds that warming ocean temperatures and changes in the North Atlantic Oscillation are causing a significant decline in shellfish landings. Habitat degradation, including increased predation and poor water quality, is also contributing to the decline.
A new bivalve species, Borniopsis mortoni, has been discovered dwelling on a sea cucumber in mudflats off southwestern Shikoku Island, Japan. The species uses the host burrows for shelter from predators and has adapted to its small body size due to the narrow burrow of the host sea cucumber.
Researchers present a novel method to analyze apatite inclusions in magmatic zircon and titanite, allowing estimation of whole-rock Sr and SiO2 concentrations. This technique provides insight into petrogenesis and provenance, enabling better understanding of the continental crust's evolution.
New research confirms the 'out of the tropics' model for tropical biodiversity, where most evolutionary lineages started in the tropics and expanded outward. Bridge species, which straddle the boundary between tropics and temperate regions, play a crucial role in this process.
A new study suggests that mass extinctions permanently alter the pace of evolution, with species diversification rates shifting after catastrophes. Researchers analyzed bivalve mollusks and found that origination rates increased or decreased suddenly at mass extinction events, reflecting a permanent change in evolutionary speed.
A global analysis of marine bivalves reveals the echo of ancient mass extinction, with the recovery rate persisting despite latitudinal differences. The study found that the initial post-extinction boom never really fizzled out, but instead slowed to a crawl without returning to pre-extinction levels.
Scientists confirm tropical regions as key to global biodiversity, with a group of shellfish defying conventional patterns. Contrary to expectations, the Anomalodesmata group shows peak diversity in mid-latitudes, contradicting standard patterns.
A recent study by UWM paleoecologist Margaret Fraiser suggests that elevated CO2 levels contributed to the Permian-Triassic mass extinction, with bivalves emerging as the only survivors. The research provides valuable insights into the impact of CO2 on marine ecosystems and could help scientists predict future oceanic changes.
The tropics are revealed as the Earth's most fruitful biodiversity spawning ground, with fossil data indicating a consistent pattern of extinction, origination, and immigration. The study suggests that human-caused extinctions in the tropics will have long-term consequences on global biodiversity.
A new study reveals that tropical regions are both a cradle and a museum of biodiversity, with many species originating in the tropics and spreading to higher latitudes. The research suggests that preserving tropical ecosystems is crucial for maintaining global biodiversity.
Researchers found that small body size and parasitic lifestyles hinder fossilization, while burrowing clams have a higher chance of becoming fossils. The study provides strategies for improving the reliability of the fossil record, enabling scientists to better understand biological dynamics.
A team of Virginia Tech researchers is assessing the reliability of measuring photos of fossils to compile body size data. They found that while the method has some bias, it can still be useful in answering important questions about the history of life.
Researchers studied encrustation on fossilized shells to gain insights into ancient sea ecosystems. The analysis found that epibionts preferentially colonize brachiopod shells, providing clues about the evolution of these organisms.
A study by Jennifer Stempien explores the geographic influences on species variation in ancient bivalves. She found that specimens from different locations exhibited wide variability in physical characteristics, suggesting a strong geographic influence over time.