Articles tagged with Aquatic Animals
Research suggests that animals in Antarctica faced harsher conditions during Ice Ages than today, leading to mass migrations. The study found that polynyas, areas of open water, existed far south of current winter sea-ice boundaries, supporting local food webs.
The newly discovered grey-faced sengi (Rhynchocyon udzungwensis) is a large, rare species found only in two high-altitude forest blocks in Tanzania's Udzungwa Mountains. Its unique features include a distinctive grey face and jet-black lower rump, highlighting the region's exceptional biodiversity.
The discovery of a 480-million-year-old machaeridian fossil has provided new insights into the evolution of annelid worms. The specimen's soft tissues have revealed an elongate body with paired limb-like extensions and stiff bristles, confirming its classification as an annelid worm.
A study by researchers at the University of California, Santa Cruz, found that certain marine mammals have evolved to protect their brains from conditions of low oxygen. The amounts and kinds of globins in the brain correlate with physical activity patterns of various wild mammals.
Scientists studying ancient fish bones in Scandinavia have discovered that warm-water species like anchovies and black sea bream are returning to Danish waters as temperatures rise. This finding suggests that sustainable cod populations can be maintained in the North Sea even during climate change, but with reduced fishing pressure.
Researchers studying Holothuria glaberrima found that sea cucumbers can rapidly regenerate lost body parts by healing wounds with similar cellular mechanisms. This discovery may lead to new insights into repairing human tissues.
UCSB researchers have discovered a key milestone in the evolution of animal vision, finding evidence of light-sensitive genes in ancient aquatic animals. The study, published in PLoS ONE, suggests that animal vision emerged around 600 million years ago.
Researchers studied crayfish brain function, discovering integration of sensory inputs from antennae, legs, and antennules for environmental awareness and hunting success. Crayfish use distinct senses to detect food, predators, and mates in their aquatic environment.
Researchers identified a genetic activity required for digit development in limbed animals, found in sharks' genomes, and believe it existed more than 500 million years ago
Researchers have studied the secret lives of southern elephant seals, revealing their detailed feeding behavior in relation to oceanographic features. The measurements show that seal populations in different regions have distinct foraging strategies, which may explain the decline of Indian and Pacific seal numbers since the 1950s.
New research finds that cold-blooded Antarctic marine animals, such as the limpet, cannot efficiently grow or increase growth rates in warmer water. This suggests they may struggle to cope with predicted temperature increases, potentially affecting biodiversity.
The sea anemone genome shows similarities with the human genome, providing a new view of our common ancestors. The study found that many genes are conserved across species, allowing scientists to infer features of the ancestral genetic blueprint for animals.
Researchers discovered genes in a sea sponge that resemble those found in human synapses, suggesting the nervous system evolved earlier than previously thought. The study reveals that sponges have genetic components of synapses, indicating they may have interacted with each other similarly to humans and mice.
Five new species of nudibranchs, a group of mollusks lacking outer shells, have been discovered in the Tropical Eastern Pacific. The discovery may provide cures for diseases currently untreatable due to the sophisticated chemical defense mechanisms developed by these organisms.
New research reveals that sharks rely on both olfactory systems and lateral lines to track odor sources, particularly in dark waters. This discovery sheds light on animal navigation underwater and has implications for the development of autonomous underwater vehicles (AUVs).
A study published in the Journal of Physiology found that adding marine omega-3 fatty acids to a steer's diet increased sensitivity to insulin, improving protein metabolism. This could lead to alternative methods for increasing muscle mass in animal farming.
A Cardiff University study found that climate change is causing a decline in springtime macroinvertebrate abundance by up to 21% for every 1 degree Celsius rise in temperature. The study predicts that species numbers could fall by 12-25% over the next 50 years.
A comprehensive global survey reveals that island populations have significantly higher densities of lizards and other animals compared to mainland ecosystems. This study highlights the increased vulnerability of island species to biological invasions, sea level rise, and storm activity due to climate change.
Dartmouth-led research reveals that animals fed nutritious food have lower concentrations of methylmercury, a neurotoxin that can accumulate to hazardous levels. This discovery suggests ways to slow methylmercury's passage up the food chain to fish, potentially reducing its toxicity.
Researchers uncover 95 million-year-old snakelike marine animal with vestigial limbs, challenging previous understanding of limb loss in lizards. The discovery provides clues to the evolution of terrestrial lizards as they returned to water and offers insights into the development of body plans.
A new study published in PLoS Biology found that bdelloid rotifers, microscopic aquatic animals without males, have evolved into distinct species after over 40 million years of asexual reproduction. Genetic and jaw-shape evidence revealed adaptation to environmental differences as the primary driver of speciation.
A new theory proposes that cold, ice-containing climates created by strong algal growth in the oceans led to the rise of multicellular animals. This climate-biosphere interaction mechanism may have facilitated complex life around more massive and short-lived stars.
Researchers have identified a new protein super-family called DANGER, which plays a crucial role in cell growth and differentiation. The discovery has significant implications for understanding animal evolution and development, as well as potential treatments for diseases such as Smith-Magenis syndrome and chronic myeleoid leukemia.
Scientists discovered that the neural processes in sea creatures are far more complex than previously thought, with thousands of genes active at any given time within a single brain cell. This study sheds light on how genes control the generation of specific brain circuitry and enables learning and memory.
The study suggests that the oldest-known animal eggs and embryos were actually giant bacteria, complicating our understanding of microfossils. The researchers found that these ancient organisms could have preserved easily due to their ability to deposit phosphorite.
Scientists have discovered a unique, mouse-sized land animal in New Zealand, which challenges the theory that birds evolved without competition from land mammals. The discovery also sheds new light on climate change in the region, indicating a massive shift from warm and wet to cool and dry conditions.
Researchers discovered that groupers and giant moray eels work together to hunt prey, sharing roles and coordinating behavior. This mutually beneficial arrangement highlights the complexity of fish social interaction and challenges our understanding of animal intelligence.
Dunkleosteus terrelli, a 400-million-year-old fish, had the strongest bite of any fish with a force of 1,100 pounds, rivaling that of large alligators and Tyrannosaurus rex. Its unique bladed dentition focused the bite force into a small area, while its ability to open its mouth quickly created a strong suction force.
Enforcement patrols in the Serengeti National Park have significantly reduced poaching of elephants, African buffaloes and black rhinos. The study used a catch-per-unit-of-effort technique to estimate poaching intensity, finding that increased patrols led to a precipitous decline in poaching and population recovery.
Genetic analysis of Xenoturbella, a worm-like creature, reveals its unique characteristics and confirms the common ancestry between humans and other chordates. The discovery provides insight into the evolution of brains in animals.
Researchers at Ohio State University have discovered complex organic molecules in 350-million-year-old fossil sea creatures, revealing a new way to track species evolution. The findings offer a significant breakthrough in understanding how species adapted and thrived over millions of years.
Scientists from Woods Hole Oceanographic Institution analyzed antique whale oil samples from the Charles W. Morgan, discovering 11 halogenated organic compounds similar to toxic industrial HOCs.
Scientists recorded digitally-tagged narwhal vocalizations, revealing individually-distinctive pulsed/tonal signals and whistles. The findings suggest that these sounds may facilitate individual recognition or reunion with more distant group members.
A NASA study reveals the Earth is warming at a rate of 0.2° Celsius per decade, pushing global temperatures to levels not seen in thousands of years. This rapid warming trend is forcing species migration and posing a significant threat to biodiversity.
A new study suggests that oceanic cold seep mollusks have an older evolutionary history than the marine mollusk community as a whole. Cold seeps may have protected these unique animals from mass extinctions and low oxygen levels, allowing them to thrive in challenging environments.
Researchers found that when species colonize the deep sea, large-bodied species become smaller and small-bodied species become larger. This pattern is consistent with the island rule, which states that isolated animals evolve to be larger or smaller based on their environment.
A study by Craig McClain and colleagues found that marine snails in deep sea areas tend to be smaller than their shallow-water relatives, while those less than 12mm long become larger. This suggests a compromise between different selection pressures.
Salps, small jellyfish-like creatures, transport massive amounts of carbon from surface to deep sea, potentially influencing global climate. Researchers estimate 4,000 tons of carbon are sunk daily through salp fecal pellets.
The Ocean Tracking Network, a global collaboration of scientists and experts, aims to track the movements of important species using electronic tags. The network will use an extensive international array of acoustic receivers on the ocean floor to collect data on water temperatures, salinity, and light conditions encountered by animals.
The Massachusetts Institute of Technology has released a free educational pamphlet warning of the dangers of dumping seafood into the wild. Invasive species can travel through ship ballast water, aquaculture facilities, and consumer releases, causing economic and environmental damage.
A team of scientists has discovered a new species of dwarf sauropod dinosaurs in the Harz Mountains, estimated to weigh only one tonne. The unique microstructure of their bones suggests that these animals were fully grown when they died, reaching lengths of up to 6 metres and 90 centimetre tall.
New findings of myglobin levels in the common carp could help scientists understand how humans could survive loss of oxygen supply to their tissues during a stroke or heart attack. The research suggests that the protein plays other roles in protection from low levels of oxygen, apart from storing oxygen.
Researchers have discovered a dichotomy in sea turtle migration patterns in the eastern Atlantic, revealing two distinct foraging strategies. The study found that adult turtles occupy different habitats and diets, with coastal adults being larger and feeding on arthropods, while oceanic adults are smaller and feed on floating plants.
Researchers used satellite tracking to follow ten turtles from Cape Verde, discovering they adopted two distinct approaches to finding food linked to their size. This challenge current conservation efforts, highlighting the need for an international cooperative strategy to safeguard these animals.
Researchers find Hox system genes are independently evolved in cnidarians, contradicting its role as defining characteristic of metazoan animals. This discovery explains the remarkable morphological diversity seen in Cnidaria.
Researchers discovered that hagfish can regulate their acid-base balance and have a greater capacity for rapid pH compensation than any other fish studied. The hagfish's ability to maintain a stable body temperature and salt concentration in its blood enables it to cope with high levels of CO2.
A team of scientists led by Rudolf Raff discovered that certain conditions, such as the presence of hydrogen sulfide, can facilitate the fossilization of early animal embryos. The findings suggest that fossils from 500 million years ago may be embryos encased in a fertilization envelope and fossilized under highly reducing conditions.
Researchers isolated genes from the starlet sea anemone to understand body-plan patterning. They found that two types of proteins encoded by these genes are expressed differently in anemones compared to bilateral animals like flies and frogs, suggesting an ancient function for this signaling system.
Researchers found that lampreys, long thought to be evolutionary outliers, use the same essential protein to build cartilage as all other vertebrates, including humans. The discovery sheds light on the early origins of vertebrate skeletal development and challenges traditional views on vertebrate evolution.
Marine mammals like otters and manatees are providing early clues of our impact on the oceans. Research suggests that their deaths from diseases like Toxoplasma may be linked to human activities such as cat ownership and algal blooms.
Scientists discovered that Antarctic krill 'parachute' several times during the night, injecting more carbon into the deep sea than previously understood. Krill feed on phytoplankton at night and excrete waste at depth, making them a key player in removing carbon from the atmosphere.
A new study suggests that the animal family tree looks fuzzy because early evolution occurred in clusters, making it difficult to reconstruct relationships. Scientists used DNA data to try to generate a clear picture of the tree, but instead found a bush with many branches sprouting close together.
Researchers discovered a surprisingly active innate immune system in sea urchins that utilizes previously unrecognized mechanisms. The study's findings have implications for understanding innate immunity in vertebrates and may lead to the discovery of novel immune diversity in other animals.
Researchers at the University of Florida have developed a DNA identification tool that can accurately identify species from animal tissue samples, with an error rate as low as 4%. The study uses a comprehensive catalog of species and analyzes tissue samples from marine organisms to quantify its effectiveness.
A study on the Platynereis genome reveals that early animals had complex human-like genes, contradicting previous assumptions. The discovery sheds new light on human evolution and highlights the importance of preserving ancient genetic features.
Research reveals that ice sheets scoured the sea floor, erasing whole communities of animals. Seafloor organisms may have emigrated to the deep sea or recolonised the Antarctic shelf during warm periods following ice ages.
Researchers are using a NERC grant to study the unique creatures that live in hydrothermal vents, which could hold the key to understanding life on other planets. These organisms rely on bacteria living inside them for survival, and their geological history is believed to be radically different from other forms of life.
Researchers found that prenatal exposure to domoic acid levels below those deemed safe for adults caused lasting behavioral effects and impaired memory in rats. The findings imply that unborn children may be negatively affected by the toxin at levels not causing symptoms in expectant mothers.
The Harbor Branch Oceanographic Institution's Deep Scope expedition has made several groundbreaking discoveries, including the detection of ultra-violet light sensitivity in a deep-sea crab. The team also captured new video footage of a large, recently discovered squid species that appears to be attracted to bioluminescent displays.
Researchers study two entire sea anemone colonies clashing, discovering organized armies of warriors, scouts, and reproductives. Complex behaviors emerge at the group level despite simple organism members.