Articles tagged with Aquatic Animals
The study of two Siberian blue lakes reveals a similarity in zooplankton species composition to other Western Siberian lakes, with species such as cladocerans and copepods dominating. The concentration of heavy metals exceeds sanitary standards, but is characteristic of the region's aquatic ecosystems.
A team led by the University of Exeter suggests that animals carrying sensors can fill gaps in ocean monitoring, particularly in areas near poles and shallow coastal regions. The study highlights the potential for animal-borne sensors to enhance our understanding of climate variability and weather patterns.
Researchers analyzed stable carbon and nitrogen isotopes in fur samples from 29 species of mammals to measure the impact of agriculture on their diet. The study found that herbivores and omnivores inhabiting forest fragments consumed agricultural resources, while carnivores close to croplands preyed on prey that feed on these resources.
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.
A new study suggests that emperor penguins in Antarctica are likely to decline by 86% by 2100 due to sea ice loss, with only a 5% chance of survival under the 1.5 degree Celsius scenario. The 'business as usual' scenario is even more dire, with nearly complete colony loss and extinction imminent.
Researchers at Kyoto University found that bottlenose dolphins can coordinate their behavior in a rope-pulling task, with initiators waiting for followers to reach the task and followers matching the initiator's swimming speed. This flexible coordination is likely rooted in their patterns of affiliative behavior.
Researchers found that iron-poor environments limit fish populations worldwide, including areas with no fishing activity. The study highlights the crucial role of iron in marine animal ecology and suggests a new perspective on fish life cycles.
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.
A recent study analyzed over 4.7 million mtDNA sequences from GenBank and found fewer errors than predicted, with less than 1% of sequences mislabeled. The researchers identified potential sources of error, such as human or lab animal contamination, but overall found GenBank to be a reliable tool for environmental DNA identification.
Researchers have discovered a new species of choanoflagellates that can act together to change shape and swim. The microbes use light-sensing proteins to coordinate their movements, suggesting this ability pre-dates the first animals.
Researchers discovered that warty and smooth-skinned octopuses from different depths are the same species. The deeper they live, the bumpier their skin and smaller their bodies. Genetic analysis confirmed these findings, indicating that environmental factors, such as food availability, influence the animals' appearance.
A new fossil stingray, Lessiniabatis aenigmatica, has been discovered with an exceptional anatomy that differs from living species. The find provides insights into the evolution of these animals and their recovery in marine ecosystems after the end-Cretaceous mass extinction.
The authors propose an 'internet of health' where wearable sensors provide non-intrusive data on a person's health, correlated with environmental factors. This could lead to early disease prevention and personalized medicine.
Scientists at the Buck Institute are exploring the genetics of mice that can regrow axons after injury to develop new treatments for human brain injuries and diseases. The researchers will use a new method to identify genetic differences between closely related species, which may hold the key to boosting lifespan or healthspan in humans.
A University of Washington team developed an artificial suction cup that borrows from the Northern clingfish's natural design, performing better than its natural counterpart. The prototype held up to 230 times its own weight and was flexible enough to conform to rough surfaces.
A new study finds that copepods, small crustaceans found in nearly every freshwater and saltwater habitat, adapt to warming waters through phenotypic plasticity rather than genetic changes. The research suggests that thermal adaptation can happen relatively quickly, reducing organisms' vulnerability to warming.
Scientists at UMass Amherst and Perth Zoo have created the world's first accurate, publicly available 3D model of the endangered Southern white rhino. The model will be used for conservation efforts and educational purposes, providing a powerful tool to assess an animal's body condition in the field.
A fossil skull found in a Bavarian town in the 1770s has been recognized as Mystriosaurus laurillardi, a now-extinct species that lived in tropical waters during the Jurassic Period. Researchers have also identified another skull discovered in Yorkshire, belonging to the same species.
Researchers from the GLOBE Institute found that massive fluctuations in ocean oxygen levels during the Cambrian explosion were influenced by animal behavior. The discovery suggests that animals may have controlled their own development through adjustments to oxygen levels, shedding light on Earth's 'heartbeat' and its impact on life.
A team of scientists has discovered fossils of an ancient animal species, Yilingia spiciformis, which date back approximately 550 million years. The fossilized remains and trails left by the creature provide conclusive evidence of segmented and mobile animals evolving during this time period.
A new study from Oregon State University found that underwater soundscapes varied widely across four protected marine sites, driven by differences in animal vocalization rates, human activity and weather. The study provides a baseline for these regions and can be used for comparison over time.
Researchers identified cone snails' hydraulically propelled feeding structure as the quickest movement among mollusks by an order of magnitude. The radular harpoon can propel into prey within 100 microseconds with extreme speeds similar to a fired bullet.
A new underwater gripper developed by researchers at Harvard's Wyss Institute for Biologically Inspired Engineering has successfully caught and released jellyfish without causing harm. The ultra-soft gripper uses hydraulic pressure to wrap around a single jellyfish, then release it, allowing for extensive study of marine organisms.
A study published in Evolution Letters reveals that many carnivorous species share a common ancestor dating back 800 million years, while herbivory is more recent. The research suggests that animals tend to adopt the same dietary category as their closely related species, implying that switching diets may not be easy.
Researchers found that individual cortical neurons cannot find order amidst chaotic signals, but the brain averages many neurons' activity for certainty. External inputs can briefly switch networks to a regime of highly reliable spiking, allowing the brain to overcome noise and chaos.
Researchers found that Bcl11b determines which class of OR gene is expressed in olfactory neurons, switching between class I and II. This mechanism was also seen in frogs, where Bcl11b expression changed from water-nose to air-nose during metamorphosis.
A new study at the University of Hawaii found that a tropical marine sponge obtains essential nutrients from its symbiotic bacteria, not from filtering seawater. This discovery provides insight into the biology of sponges and highlights the importance of marine microbes in their diet.
Researchers have identified a new family of small-molecule metabolites responsible for the bright green color in certain shark species. This unique biofluorescence mechanism allows sharks to identify each other and potentially fight off microbial infections.
Researchers have identified a previously unknown family of small-molecule metabolites responsible for the bright green color in sharks' skin, which may also aid in identifying other sharks and fighting microbial infections. The discovery opens new questions about the potential functions of biofluorescence in shark biology.
Scientists have found that severe marine heatwaves can lead to the death of coral animals themselves, causing the underlying skeleton to decay rapidly. This new understanding highlights the need for urgent action to preserve coral reefs and mitigate the impacts of climate change.
Researchers found that invasive plants have a negative impact on native animals, reducing their abundance and altering ecosystem functions. In contrast, exotic animals are unaffected by invasive plants.
Researchers found that sharks are much rarer in habitats closer to people and fish markets, with a significant drop in average body size. The study suggests that industrial fishing is the main driver of this decline, which has major implications for ocean ecosystems.
A new study investigates the bioenergetics of sharks and rays, revealing how climate change affects their populations. The research suggests that these ocean giants will face compounding climate pressures, including warmer oceans and reduced prey availability.
Researchers discovered that the cuttlefish has a simple microbiome containing only two families of bacteria: Vibrionaceae and Piscirickettsiaceae. The most dense community of microbes was found in the esophagus, contradicting previous assumptions about where microbe populations would thrive.
Researchers at Hokkaido University discovered that five-armed green brittle stars use a pumping movement pattern to coordinate their movements. A mathematical model suggests that internal fluid flow can achieve this coordination without neuronal activity.
Researchers identified two key elements of animal life cycles: pace (reproduction rate and lifespan) and shape (mortality rate across lifespan). This study provides insights into conservation strategies and predicts winners and losers from the global environment crisis.
A study on the cultural status of saltwater crocodiles in East Timor reveals a complex relationship between humans and animals. The research highlights the importance of incorporating traditional ecological knowledge into wildlife management to address severe human-crocodile conflict.
Researchers discovered that a tidepool crustacean can survive oxygen deprivation without key genes, suggesting multiple survival mechanisms. The study highlights the importance of exploring alternative pathways for coping with hypoxic environments.
Researchers used computer simulations to study Ediacaran organisms' feeding habits, showing they engaged in complex suspension feeding and oriented themselves to amplify nutrient-rich currents. This work helps place Ediacarans on the tree of life alongside modern sea creatures, providing new insights into their evolution.
A newly identified genus and species of freshwater clam, Lithoredo abatanica, was found to eat rocks and expel sand as it burrows in the Abatan River. The shipworm's unique anatomy has revealed new information about its ecosystem engineering capabilities.
Researchers have discovered a new species of egg-sucking sea slug, Olea hensoni, in Florida's Cedar Key. This unique slug belongs to the sacoglossans group and has been found to prey on eggs of fellow slugs and snails. The discovery highlights the vast marine life remaining to be discovered, even in well-studied areas.
Researchers used a non-invasive device to investigate blood volume and oxygenation in freely diving harbor seals, finding that they constrict peripheral blood vessels and increase cerebral blood volume before submersion. This suggests that seals have cognitive control over their circulatory systems.
The study reveals links between the health of cod and seal with the availability of bottom-living animals, affecting their food supply. Climate change and eutrophication are driving these changes, threatening the Baltic Sea's ecosystem.
Trichoplax harbors two unusual bacterial symbionts that live in specific host cells, with Grellia residing in the endoplasmic reticulum and Ruthmannia in cells used for digestion. This discovery reveals a sophisticated level of complexity in Trichoplax.
A new study published in Scientific Reports reveals that microplastic particles are common throughout Monterey Bay, from the surface to the seafloor. The research found that small ocean animals are consuming microplastic, introducing it into food webs and highlighting a growing concern for marine ecosystems.
Research shows sediment stirred up by human activity is harming glass sea sponges in northern British Columbia. The sediment can smother sponges from the outside or clog their filtration system, leading to sponge death and ecosystem disruption.
The discovery of rare marine fossil specimens in northern Portugal has provided a more detailed picture of biodiversity during the Middle Ordovician period. Soft-bodied specimens have filled a gap in understanding evolution during this time, suggesting that many soft-bodied fossils remain to be discovered.
A CNRS and University of La Rochelle research team studied the impact of a fishing operation on orca populations. The study found that orcas who lost family members due to the fishing operation adopted erratic social behavior, leading to reduced access to food and ultimately higher mortality rates.
A CT scan of a 30-million-year-old fossil indicates that echolocation evolved independently in dolphins and other toothed whales. The discovery suggests that the evolution of echolocation may have occurred multiple times within this lineage.
A new open-access data platform, ZooArchNet, links biological and archaeological databases to provide a long-term perspective on biodiversity crises. The platform enables researchers to reconstruct biodiversity baselines from the earliest periods of human history.
A study published by the Smithsonian Tropical Research Institute has identified eight potentially new species of phoronid larvae, a type of horseshoe worm found in Panama's two oceans. The larvae were collected from plankton samples and analyzed using DNA sequencing to distinguish between different species.
A new study using AI-powered computer vision demonstrates improved accuracy in identifying marine animals and plants. The system achieved an average accuracy of 80% for general species identification, but up to 93% for specific species when trained with sufficient data.
Marine invertebrates' vision is highly sensitive to oxygen levels, with reduced oxygen causing 60-100% vision loss. Most species recover visual function when oxygen levels are restored.
A joint China-UK-Russia research team found that oxygen levels played a fundamental role in the Cambrian Explosion of animals. The study analyzed ancient seawater chemistry and determined that evolutionary radiations followed a 'boom and bust' pattern in tandem with oxygen levels.
A recent study has discovered a significant correlation between surges in oxygen levels and bursts in animal evolution and biodiversity during the Cambrian explosion. The research, published in Nature Geoscience, suggests that oxygen content in the atmosphere was a major controlling factor in animal evolution.
A new species of edrioasteroid echinoderm, Totiglobus spencensis, has been discovered, providing insight into the evolution of echinoderms from living stuck to marine sediment grains to attached to hard surfaces. This discovery sheds light on a critical time in the evolution of organisms and marine ecosystems.
Callichimaera perplexa is the earliest known swimming arthropod with paddle-like legs since the extinction of sea scorpions. Its unique appearance, including large compound eyes and bent claws, suggests that it may have evolved through heterochrony, a process where larval traits are retained in miniaturized adults.
New research reveals tube-dwelling anemones have largest mitochondrial genomes, with fragments arranged in unexpected ways and sizes varying between species. The discovery defies classic doughnut-shaped designs and raises questions about evolutionary pressures among ancient sea animals.
A new report synthesizes existing evidence on phenological shifts in the Gulf of Maine, highlighting the need for increased research and data incorporation. Marine species are responding to climate change through timing changes, with fish, birds, and mammals affected in various ways.
Marine Skin, a polymer-based material with integrated electronics, revolutionizes sea life monitoring by tracking movement and diving behavior, as well as environmental health. The system can operate at unprecedented depths, with enhanced sensitivity, and plans include additional sensing capabilities.