Articles tagged with Fish
The Klamath River dam removal project is expected to aid salmon populations by restoring habitat and reducing pathogens. However, researchers caution that disease outbreaks may still occur, and thoughtful restoration efforts are necessary.
Researchers discovered a wide range of organisms, including microbes and humans, exhibit similar movement patterns to navigate their surroundings. These patterns are thought to be linked to uncertainty management in the brain.
A new versatile platform controls peptide hormones in fish, revealing surprising findings about conserved genetic networks and adaptable hormone regulation. This innovative method holds promise for transforming fish farming practices and exploring ways to prolong vertebrate lifespan.
Researchers have pinpointed the emergence of muddy flavors in farmed fish by measuring the concentration of geosmin and other compounds. The study highlights the importance of water quality management to prevent the production of off-flavor compounds, which can impact aquaculture industry revenue and sustainability.
Researchers found that genetic recycling enabled the emergence and adaptation of 500 cichlid species in Lake Victoria over just 16,000 years. The study identified unique ancient genes and hybridisation as key drivers of this unprecedented biodiversity explosion.
Research finds that water movement between lakes can transport environmental DNA, making eDNA a promising tool for tracking aquatic species and monitoring biodiversity. The study highlights the importance of considering landscape connectivity when designing eDNA surveys to ensure accurate biodiversity assessments.
A study published in Science of the Total Environment found that biofiltration increased coho salmon hatchling survival by up to 87%, reducing mortality from stormwater runoff exposure. The method effectively removes contaminants, but implementation faces hurdles due to land requirements.
University of Wyoming researchers found that trout in Wind River Mountains lakes have adapted to their environment, showing rapid evolution. The study reveals a change in gill rakers, likely related to food sources, and highlights the importance of eco-evolutionary interactions.
Neon tetra fish use queuing behavior to evacuate through narrow openings without colliding or clogging. The species maintains a constant evacuation rate through all opening sizes, with the last few fish exiting more slowly.
A new fish species, Garra panitvongi, has been discovered in Myanmar's Ataran River basin, shedding light on its unique biology and habitat. The species, previously unknown to science, was identified by researchers who encountered it during fieldwork in the region.
A recent study from the University of Helsinki found that fish mercury concentrations are highest in winter and near spring spawning, but lowest in autumn after the growing season. This seasonal pattern is linked to changes in fish metabolism and food availability during colder months.
A Virginia Tech study found that hellbender fathers are more likely to eat their eggs in deforested areas, leading to a drastic increase in filial cannibalism. The research suggests that protecting and re-establishing forest cover around streams is crucial for the species' survival.
A biologist at Binghamton University has developed a new method to uncover the parent species of hybrid plants and animals. By examining genomic patterns within these hybrids, researchers can identify distinct ancestries and determine the order in which chromosomes were inherited from their progenitor species.
Researchers found a peptide from venomous fish Thalassophryne nattereri that controls lung inflammation and airway hyperreactivity. The molecule, TnP, inhibited cytokine production and prevented mucus-producing cell hyperplasia, making it a potential candidate for treating asthma.
A new study by the University of Essex reveals that even if UK consumers shifted towards locally sourced fish, domestic production would still struggle to meet demand. The UK's seafood imports have increased rapidly since the 1970s, driven by policy changes and stock declines.
A 24-year study of freshwater fish exposed to warm water pollution found changes in growth rates, death rates, and size. Despite expectations, the study revealed that warmer waters led to larger fish, contradicting general predictions of global warming's effects on natural ecosystems.
Researchers at Michigan State University are investigating a type of fish that produces sperm with no tails but an electric-powered mating call. They hope to understand the energy-saving mechanism behind this trait and its implications for human health, particularly in relation to a genetic disorder called primary ciliary dyskinesia.
The American Heart Association scientific statement rates how closely popular dietary patterns align with its guidance for heart-healthy eating. The statement evaluates 10 categories of diets, scoring them from 31 to 100 based on their alignment with the guidance, with some diets receiving high scores while others need improvement.
A fossil of a 'royal fish', estimated to be over 66 million years old, was discovered in Morocco, marking the first time a sturgeon has been found in Africa. This finding suggests that sturgeons may have been more widespread than previously thought, complicating models of their origin.
Researchers identified boundary vector cells in goldfish central telencephalon that encode spatial information for the first time in a vertebrate. These cells enable unique positioning and represent a significant discovery in understanding fish navigation systems.
Researchers at UToledo developed a new model to estimate the abundance of rare species like invasive grass carp in freshwater ecosystems. The model helps guide management strategies and provides insight into the effectiveness of control efforts.
Bald eagles in northwestern Washington state have become a boon to dairy farmers due to climate change, deterring pests and removing animal carcasses. The shift in salmon spawning schedule has reduced available carcasses on rivers, forcing eagles to seek alternative food sources from dairy farm by-products.
Researchers identify egg yolk proteins retained in viviparous sharks and rays, which may provide nutrition to developing embryos. The study suggests that these proteins have evolved a new function in cartilaginous fishes, potentially facilitating the transition from egg-laying to live birth.
A new study reveals that northern and southern resident orcas differ in their hunting behaviors, with males catching more salmon per hour than females. Southern resident males outperform females by 152%, highlighting a distinct pattern of foraging that may contribute to the population decline.
Cambridge researchers observe Unio crassus mussels squirting water jets up to a meter away from the riverbed to increase the chances of their larvae attaching to specific host fishes. This behavior has never been seen in any other mussel species and may be crucial for the endangered species' survival.
A new study finds that releasing captive-bred native fish into the wild negatively impacts entire ecosystems, disrupting delicate balances and leading to reduced genetic diversity. The practice, which has been used for over a century, may be doing more harm than good.
A groundbreaking study found that creating shallow water zones enhances fish populations, while coarse wood bundles have positive effects in selected lakes. The approach has stronger long-term effects than narrow species-focused conservation actions.
A new study by Institut Pasteur reveals that the 'bony-tongues' and 'eels' are genetically linked, shedding light on the evolutionary history of teleost fishes. The researchers sequenced genomes of several species and reconstructed relationships between different fish groups.
Researchers analyzed ancient fossils in South Africa to discover a new predatory fish species from the Late Devonian period, estimated to be around 360 million years old. The species, Hyneria, may have grown up to 2.5m long, making it one of the largest known fish species from this era.
Scientists sequenced genomes of 'eel' species to reconstruct relationships between teleost fishes, ending decades-long controversy over their evolutionary history. The analysis revealed a single group, Eloposteoglossocephala, that encompasses both eels and bony-tongues.
Researchers have identified seven distinct species of whitefish in the Reuss river system, with two new species found in Lake Lucerne and one in Lake Zug. Eutrophication led to the extinction of several species, but the discovery highlights the unique characteristics of each lake's ecosystem.
A 319-million-year-old fossilized fish has provided the oldest example of a well-preserved vertebrate brain, shedding new light on the neural anatomy and early evolution of ray-finned fishes. The discovery reveals that brain evolution in these animals unfolded more complexly than previously thought.
Evans' five-year grant will examine how modularity affects the evolution of complex biological structures and provide a framework for their study. The research could advance our understanding of shape change in other complex structures and have cultural and historical significance.
Researchers found muskies' size, boldness, and exploration levels are linked to their likelihood of striking. Anglers should prioritize catch-and-release and best practices to protect these traits.
A new study from Lund University found that male crucian carp change their appearance in response to predatory fish, making it harder for them to be eaten. This adaptation is linked to stress hormones and differs between males and females.
Researchers at the University of Adelaide analyzed DNA samples from over 100 retailers across South Australia and found four threatened shark species being sold as flake. The study highlights the need for clearer national guidelines or labelling laws to build trust across the supply chain.
Researchers developed AI-powered software to measure and classify pacu fish, enabling breeders to select animals with higher fillet yield and faster weight gain. The system uses deep learning and can recognize different parts of the fish even in challenging environments.
Researchers found that a Mediterranean diet can improve fertility outcomes by reducing inflammation and increasing sperm quality in men. The anti-inflammatory properties of the diet may also enhance couples' chances of conception.
Rondaxe Lake's experience is just one of thousands worldwide as lakes lose oxygen due to warming, leading to conditions like hypoxia and anoxia. This phenomenon, exacerbated by seasonal stratification, threatens aquatic life and ecosystems.
A study at the University of Gothenburg discovered a unique quick-closing valve in the aquaporins of climbing perch fish, allowing them to rapidly regulate water in their cells. This finding could lead to the development of new drugs for cancer and Alzheimer's disease by understanding how brain cell aquaporins function.
Researchers at Nagoya University discovered that grass puffer fish use a non-toxic version of their deadly toxin, TDT, to attract mates and warn off predators. The study found that TDT serves as an odorant, activating specific olfactory sensory cells in the fish's brain.
The Devils Hole pupfish has the lowest genetic diversity among known vertebrates, with 58% of its genomes identical. This lack of diversity may doom the species to extinction as climate change and human impacts increase.
A new review highlights the lack of understanding about non-game native transplant (NGNT) fish in the US, which can have significant impacts on ecosystems. Researchers urge anglers and aquarium hobbyists to take steps to prevent NGNT invasions, such as not releasing bait fish into different watersheds.
Researchers at Nagoya University identified the pheromone PGE2 involved in puffer fish spawning behavior, which is synchronized with the lunar cycle. The study found that applying PGE2 to puffer fish triggers their characteristic writhing motion during spawning.
A study published by the University of Zurich has found that vocal communication in vertebrates has a common and ancient evolutionary origin, dating back to around 407 million years ago. The research used vocal recordings and contextual behavioral information from 53 species across four major clades of land vertebrates.
Trinidadian killifish exhibit larger brain size in high-competition environments, increasing their ability to forage and survive. The study provides experimental evidence that brain size is an adaptive trait in dense populations.
New research published in Nature suggests that the earliest gills played a crucial role in ion regulation, contradicting traditional views on their evolution. The study found ion-regulating cells in the gills of lampreys, amphioxus, and acorn worms, revealing an early chapter in the evolutionary story of gills.
A Washington State University study showed that drone photography can effectively estimate the number of rocky hollows in the Wenatchee River where salmon create their eggs. The researchers found roughly double the number of redds using drones compared to ground-level observations, but with high variability. This technology has potenti...
Researchers at the University of Oxford discovered that goldfish can accurately estimate distances by processing visual cues. The study found that goldfish use 'optic flow' to estimate distance, unlike terrestrial animals which rely on changes in angle between their eye and surrounding objects.
The discovery of complete early Silurian jawed fishes is a significant finding that sheds light on the origin of jaws in vertebrates. The two species, Xiushanosteus mirabilis and Shenacanthus vermiformis, have revealed key features about their body shape, form, and evolution.
Scientists have discovered 439-million-year-old remains of a toothed fish in China that suggest the origins of modern osteichthyans and chondrichthyans. The fossils, named Qianodus duplicis, possessed spiral-like dental elements with multiple generations of teeth.
A new study finds that neon goby parents help their offspring develop by pushing them out the door at the right time. Offspring hatched by parents are larger and more developed than those that hatch on their own, suggesting a complex parenting behavior. This discovery highlights the surprising complexities of fish parenting behavior.
A study analyzing over 4,131 pregnant mothers found that the essential nutrients in fish can protect against mercury content and that frequency of fish consumption is a more important factor than type. The researchers argue for revising current advice warning pregnant women not to eat certain types of fish.
Researchers from the University of Copenhagen and Aarhus University have discovered new insights into the coelacanth's unique physiology, including its ability to swim upside down. The study used CT and MRI scanners to model the fish's body, revealing a special skeleton and precise distribution of fatty tissue.
A new University of Illinois study shows that fathead minnows can handle simulated heatwaves with few nasty side effects. Most minnows rapidly returned to normal physiological functioning after cooling down, but some became more susceptible to oxidative stress.
Researchers deployed video cameras on Navy dolphins to study their hunting behaviors in San Diego Bay and the Pacific Ocean. The footage revealed the dolphins' prey preferences, hunting strategies, and even encounters with a sea snake.
A study of the variegated snailfish reveals it has the highest expression levels of antifreeze proteins ever reported, crucial for survival in sub-zero waters. Warming oceanic temperatures pose a threat to these specialized fishes as they face increased competition from temperate species.
Researchers aim to uncover information on blotchy bass syndrome's prevalence, distribution, and potential risks through data collected by citizens. The study will help determine which bass species are susceptible and which seem immune.
A new study reveals that reef fish diversity is driven by a recent innovation among bony fish – feeding by biting prey from surfaces. This feeding method allowed fish to access diverse new prey, promoting the evolution of a wide variety of body shapes and a high rate of diversification.
Researchers found 61 out of 86 species threatened with extinction, with coastal sharks facing greatest conservation concern. Increased protections and international trade regulations are crucial to prevent extinctions among these species.