Articles tagged with Fish
A University of Queensland and Deakin University-led study reveals that predators drive the evolution of cooperative relationships between species like clownfish and anemones. The research found that fish-anemone mutualisms have evolved at least 55 times across 16 fish families over the past 60 million years.
Researchers have identified a shift in fishing behaviors on Indonesian islands Alor and Timor around 7,000 years ago, likely due to changes in sea levels and environmental conditions. The study used an analysis method traditionally used in biology to identify fish habitat in archaeological material.
Researchers and students from UCLA monitor seafood purchases from Los Angeles restaurants, extracting DNA to distinguish between fish species. They find that sushi mislabeling is pervasive, but intentional fraud is less common, with some restaurants already implementing changes based on their findings.
Researchers found spotted seatrout continued spawning in late August 2017 during Hurricane Harvey, with the storm only briefly disrupting their pattern. This finding suggests these fish are well-suited to handle changing conditions and may be key indicators of climate resilience.
Researchers at MIT have developed an innovative acoustic imaging system that enables the instant visualization of massive cod shoals, shedding light on the health of this depleted species. The team's findings suggest that average cod shoal sizes serve as a critical indicator for tracking population recovery.
Scientists have discovered that different piranha species can be identified by the pattern of their barks, which could lead to more efficient conservation efforts. The study's findings suggest that passive acoustic monitoring may be a useful tool for studying piranha behavior in the wild.
Researchers found thousands of genetic variants linked to both pit and castle building behaviors, suggesting complex patterns of genetic variation and regulation. The study provides evolutionary insights into the development of these natural behaviors in cichlid fishes.
Researchers developed a genetic probe to identify DNA of alewife and blueback herring, finding that eDNA abundance data corresponded well with traditional field methods. The study created a map of where river herring are spawning across the Chesapeake Bay watershed.
Researchers have sequenced the Eurasian perch genome, which is three times smaller than the human genome yet contains over 23,000 genes. The study reveals the genetic mechanisms behind the species' ability to adapt to extreme environmental conditions and its significant impact on methane cycle in lakes.
Research explores effects of crude oil on native salmon populations, finding exposure causes toxic changes in hearts, brains, and performance abilities. Crude oil also leads to long-term consequences including mortality and brain damage.
A new study finds that individual rainbow trout strains from Canada and California exhibit varying levels of heat and oxygen tolerance. This natural variation may help some fish survive global warming, while others are more vulnerable.
A remarkable new species of bony fish has been described from 150-million-year-old limestone deposits in South Germany, featuring piranha-like teeth. The fossilized specimen's jaws revealed long, pointed teeth and triangular serrated cutting edges, suggesting a mouth equipped to slice flesh or fins.
Researchers found that more aggressive farmerfish groups, which defend their territories from intruders, resided near branching corals and provided better protection. Additionally, corals planted in the territories of aggressive fish suffered less damage than those in non-aggressive groups.
Researchers discovered that the Gilthead sea bream was extensively traded from Egypt to Canaan over 2,000 years, with the majority coming from a hypersaline waterbody like the Bardawil lagoon. This ancient trade indicates an early form of commercial fish exploitation.
A study by the Technical University of Munich found that native fish species are on the verge of extinction, while invasive species like rainbow trout and topmouth gudgeon are increasing in population. The analysis of over 30 years of data reveals a decline in specialiszed species with complex life cycles due to habitat changes.
Scientists from California Academy of Sciences discover a new species of reef fish with vivid pink and yellow stripes, found in remote Brazilian archipelago. The discovery sheds light on the vast ocean habitats that remain unexplored and highlights the importance of protecting these ecosystems.
A study published in River Research and Applications detected over 1,000 endangered razorback sucker and dozens of Colorado pikeminnow downstream of the Piute Farms Waterfall. The fish moved from up to 600 miles away in the Colorado River, suggesting that spawning migrations may be cut off by the waterfall.
A team of scientists from UC Santa Barbara and USGS used eDNA to detect the presence of white sharks in local waters, providing clues for lifeguards and helping monitor the species' recovery. The study's success could lead to real-time monitoring and better understanding of marine biodiversity.
Researchers have successfully mapped the orange clownfish's genome using high-tech sequencing tools, creating a comprehensive genetic blueprint. The completed genome contains over 26,000 protein-coding genes and will aid in understanding reef fish biology, sex change, larval dispersal, and ocean acidification impacts.
A team of scientists from Newcastle University has discovered three new species of snailfish in the Atacama Trench, a record-breaking 8000-metre-deep location. The fish, which are part of the Liparidae family, are highly adapted to living in extreme pressure and cold conditions.
Researchers found that clown fish stripes are essential for individual recognition and critical to their social organization among sea anemones. They also discovered the evolutionary history of striped patterns, which originated from a common ancestor with three stripes.
Researchers found that fishing in the Phoenix Islands Protected Area doubled before its implementation, leading to excess fishing equivalent to what was prevented by the reserve for 1.5 years. This suggests that anticipating marine reserves can trigger overfishing, undermining conservation efforts.
Researchers found that a specific type of fish louse, Argulus japonicus, can accumulate high concentrations of metals, potentially serving as an early warning system for water quality. The lice's unique mechanisms for protecting themselves from toxins may hold the key to detecting metal pollution.
Researchers at James Cook University found that shrimp clean parasites from injured fish without aggravating their injuries. The interaction between cleaner shrimp and client fish also reduces stress levels, potentially increasing the fish's ability to heal.
Researchers from four international universities analyzed cichlid fish DNA to understand the formation of new species. They found that hybridization between species led to rapid evolution and adaptation, boosting innovation and species development.
The researchers discovered a connection between the colouration of clownfish and the toxicity of sea anemone species they live with. The more venomous anemones have less white stripes on their hosts, suggesting the bright colouration has a protective function.
Male competition drives evolution of flashy color patterns in orangethroat darters. The males' ability to distinguish their own species from others favors the development of these flashier signals.
Snail attacks reduce Porites cylindrica coral growth by up to 43% in less than a month, threatening the survival of degraded Pacific reefs. The snails selectively prey on the last remaining coral species, exacerbating the downward spiral of reef decline.
A recent study by Anna Neuheimer and colleagues found that adult fish adjust their spawning time to match the timing of their prey, allowing their offspring to survive. This adaptation is crucial for population size and future fisheries catch, as it enables young fish to meet their food needs in a seasonal environment.
A recent study published in Journal of Evolutionary Biology found that nocturnal fishes have larger eyes than day-active species, but smaller optic tecta, indicating a trade-off in brain power. This adaptation allows them to detect movement and navigate in low-light conditions.
A new fish species, Platichthys solemdali, has been discovered in the Baltic Sea and officially recognized as an endemic species. The species can be distinguished from its European counterpart through genetic methods or by studying their eggs and sperm.
Climate change is projected to severely hinder conservation efforts for the Nassau grouper and other Caribbean Reef fish. Breeding habitats are expected to decline by 82% by 2100 if no action is taken to mitigate climate change.
Researchers found that fish adjust their escape behavior and keep a safe distance outside the shooting range when a speargun is present. The level of timidity varies depending on the size of the fish, type of diver, and location within protected areas.
Scientists have discovered that fish use brief electrical pulses to communicate without being detected by predators. This adaptation may hold clues for treatments of conditions such as epilepsy and cardiac diseases. The research also provides insights into the genetic basis of unique abilities in animals.
A massive study of tropical coral reefs found that marine reserves near heavily populated areas have only a quarter of the fish and are less likely to have top predators. Marine reserves with medium to high human pressure can still have five times more fish than openly fished reefs, offering a conservation benefit.
A massive study of 1,800 tropical coral reefs found that marine reserves near human populations struggle to protect fish stocks. However, these reserves still offer significant benefits for key fisheries species and top predators like sharks. The study highlights the importance of targeted conservation strategies in different locations.
A Rutgers-led study found that new fisheries are likely to appear in over 70 countries due to climate change, sparking conflict among nations. The movement of fish species is disrupting fisheries, leading to overfishing and reducing food, profit, and employment for many.
A portable, pressurized chamber called SubCAS has been invented by the California Academy of Sciences and Monterey Bay Aquarium. The device allows scientists to collect and surface rare, deep-sea fish without rupturing their swim bladders.
Researchers at UNH found that fish prefer kelp habitats over invasive seaweed species, but the shift may leave them with less refuge and protection. The study suggests that continued reduction in available kelp cover could have cascading effects on cunner populations and other ecosystem members.
A new study by UC Santa Barbara community ecologist Keenan Stears examines how hippos shape the ecology of freshwater ecosystems. The research found that high-density hippo pools with excess nutrients cause dissolved oxygen levels to decline, leading to a decline in fish diversity and abundance.
Researchers found degraded coral reefs are quieter than five years ago, with 40% fewer juvenile fishes attracted compared to healthy reefs. The loss of reef sounds could have devastating consequences for reefs, as fish play critical roles in maintaining their health.
A North Carolina State University study found that two fish species, western blacknose dace and creek chub, evolved different body shapes in response to urbanization. The study showed that the dace became more streamlined, while the chub developed deeper bodies in urban areas. Lab experiments confirmed that genetic differences played a...
Scientists find nearly 80% of coral reefs on Upolu Island have less than 10% cover, with recent coral death and smaller fish populations. Local human activities and climate change exacerbate the issue, while protected areas show signs of effective management.
Researchers from Chalmers University of Technology have discovered that a protein called parvalbumin, found in many fish species, can form amyloid structures that bind to and neutralize the 'Parkinson's protein' alpha-synuclein. This could potentially help prevent the formation of harmful amyloids associated with Parkinson's disease, a...
A new study reveals the existence of a unique defensive mechanism in stonefishes, featuring a 'lachrymal saber' that can deploy from their cheeks. Genetic analysis confirms the close relationship among related species, leading to a revised taxonomy and further insights into the evolutionary history of these deadly fish.
Steelhead trout that spawn multiple times have higher lifetime reproductive success, but at the cost of increased mortality and energy expenditure. The study found that single spawners die after reproduction, while repeat spawners save energy for later migrations.
Researchers from Swansea University and Deakin University have discovered vast deep-water seagrass meadows in the Great Chagos Bank of the Western Indian Ocean. The study used satellite tracking to locate these habitats, which are critical for storing carbon and supporting fish populations.
A two-year scientific study by the University of Exeter and Cefas is tracking Atlantic bluefin tuna movements in UK waters to aid conservation efforts. The study aims to improve knowledge on the species' migration patterns, habitat use, and interactions with fisheries.
New research reveals coral bleaching events reduce fish species and community diversity on reefs. The Great Barrier Reef suffered significant losses after a mass bleaching event in 2016, with some fish species declining sharply.
A long-term field study in a Swedish fjord found that herring larvae can survive and thrive in acidified seawater due to increased phytoplankton growth. However, this finding does not necessarily apply to other fish species, which may be negatively affected by ocean acidification.
Researchers have identified a new ocean-life zone, the rariphotic, located between 130-309 meters below the surface, where shallow reef fishes seek refuge from warming waters. The discovery reveals that these fish have double the depth range previously thought to exist.
A new study published in Nature Ecology and Evolution suggests that herring larvae may survive better in a future acidified ocean due to an altered food supply. This unexpected result could have implications for the long-term survival of fish populations.
Researchers found that sustainably managing fisheries can halt declines of seven to 13 bycatch populations, but not eliminate bycatch completely due to other factors. Maximizing fish stocks can increase global fishing yields by up to 15% and associated profits by as much as 80%.
Marine reserves have been shown to improve the growth rate, body size, and reproductive success of fish species. By providing a safe haven for fish to mature and reproduce, these protected areas help replenish depleted stocks and promote more sustainable fishing practices.
Researchers observed cooperative behavior in Neolamprologus obscurus fish, excavating stones to create shelter and increase food abundance. The study found that helpers played a crucial role in maintaining and expanding these shelters, leading to increased prey abundance and improved breeding success.
Researchers have found that a roundnose grenadier fish species can adapt to changing environmental conditions based on its genetic code. The study, published in Nature Ecology & Evolution, reveals that the fish's genotype varies with depth, allowing it to thrive in vast ocean habitats.
A new study by Michigan State University reveals that conserving mussels is linked to protecting their host fish species. The research found that different mussel varieties are tied to specific fish hosts and prioritize conservation efforts must protect both. This understanding will inform the development of effective conservation stra...
Despite centuries of assumption, a systematic literature review reveals no evidence that water birds transfer fish eggs into isolated bodies of water. The majority of experts surveyed found the theory plausible, but empirical evidence is lacking.
A new study published in Frontiers found microplastics in the stomachs of nearly three out of four mesopelagic fish caught in the Northwest Atlantic, with 73% ingesting pollutants. This high ingestion rate has significant consequences for marine ecosystems and biogeochemical cycling.
The Amazon molly fish species has defied extinction predictions by maintaining its all-female population through asexually reproduced offspring. Its unique genetic variability, particularly in immune system genes, contributes to its survival, allowing it to rapidly grow and adapt to environmental changes.