Articles tagged with Fish
Researchers found that cardinalfish, thought to be monogamous, engage in complex mating behaviors including infidelity and cannibalism. The study suggests that males can offset the energy costs of brooding eggs by eating them or accepting eggs from other females.
Climate change is speeding up Alaska sockeye salmon's growth rate in freshwater, causing them to migrate to the ocean faster. However, this shift may not benefit the species long-term, as it takes an extra year at sea, where they face increased competition with hatchery-raised salmon.
Researchers discovered that tiny fish living in the gaps of coral reefs play a crucial role in sustaining the ecosystem. These 'cryptobenthics,' which include species like gobies and blennies, reproduce rapidly and are consumed by other animals, providing a vital food supply for larger species.
Researchers at Simon Fraser University discovered that tiny fish species around the world are a crucial food source for larger fishes on coral reefs. These 'cryptobenthic' fishes dominate larval communities near reefs and create a steady stream of babies that rapidly replaces each adult fish devoured on the reef.
A new study found that extreme draining of Fall Creek Reservoir in Oregon aided juvenile chinook salmon downstream migration and led to the elimination of invasive largemouth bass and crappie. The reservoir's natural river-like conditions promoted a native species-dominated ecosystem.
New research reveals that lionfish populations on mesophotic reefs are affected by prey abundance and water temperature. Higher densities of lionfish were found at sites with lower bottom temperatures, suggesting cold-water upwelling currents fuel the food chain in these areas.
A new study found that large fish fences in tropical seas are causing extensive damage to habitats, including seagrass meadows, mangroves, and coral reefs. The research revealed that these fisheries catch over 500 species, many of which are babies or conservation concerns.
Researchers discovered that deep-sea fish can see color in the dark by examining the genomes of 101 species. This ability may have evolved as a survival weapon to quickly detect predators or prey in low-light conditions.
A recent study led by IGB demonstrates complex learning behaviour in Atlantic sturgeons. The fish trained to search for food in a sandy environment showed improved feeding behavior and increased formation of the transcription factor neurod1 in their brains.
A new species of fish parasite, Elthusa xena, has been discovered in South Africa, adding to the genus' diversity. The female parasites were named after Xena due to their tough appearance and egg-carrying abilities.
A species of fish in Texas' Houston Ship Channel adapted to extreme pollution due to its large population, good genes, and luck. The Gulf killifish benefited from genetic resources from a long-distant relative, the Atlantic Coast killifish, which helped it develop resilience and resistance to toxins.
Researchers discovered that reef fish rely heavily on food from the open ocean, with some species relying on more than 400 grams of plankton per kilogram of fish produced. The study found that areas of the reef exposed to the open ocean produce the largest quantities of fish, offering hope for resilient reefs.
A mathematical model shows that sacrificing a few offspring can lead to increased total offspring survival, especially in overcrowded environments. This suggests that filial cannibalism and offspring abandonment might be considered forms of parental care.
Researchers used X-ray Reconstruction of Moving Morphology (XROMM) to track catfish catching and swallowing prey, revealing coordinated movements of bones and muscles. The findings suggest that different tasks require varying levels of coordination.
Researchers found commercially available fish preparations for skin prick testing varied greatly in allergen content, leading to false negative results and potential life-threatening consequences. The team is working on advanced diagnostics and therapy for seafood allergy.
A team of scientists from Australia has shown that providing woody habitat in the Murray River significantly increases native fish populations. The study found a three-fold increase in Murray cod and doubling of golden perch abundance in restored areas compared to constant habitats.
Researchers have found that invasive round gobies in French Creek are consuming native freshwater mussels, posing a significant threat to their survival. The study's findings highlight the potential ecological disaster if gobies continue to spread in the watershed.
Researchers found that species with high adaptability tend to have longer lifespans, as they can better cope with environmental changes. The study also discovered that reversible phenotypic plasticity, where individuals can switch between different traits, is key to survival in changing environments.
A University of Guelph study found that warmer temperatures are causing fish to forage in deeper water, leading to a climate-induced reorganization of food webs. The research tracked lake trout movement and feeding habits across hundreds of lakes in northwestern Ontario.
Research on guppy fish reveals that genes in males are preserved over generations, allowing the evolution of bright colors. This genetic stability enables the conservation of characteristic traits, such as coloration, in males.
Researchers found that natural selection can couple genes for color pattern and mate preferences when species still interbreed. The study identified four narrow regions of the genome that are highly differentiated among species in hamlets, closely related reef fishes that differ in terms of color pattern.
A team led by Dr. Adriana López-Arbarello identifies three new species of the genus Eosemionotus, a type of ancient ray-finned fish, found in the Swiss Alps. The discovery provides insights into the rapid diversification of life after a mass extinction event.
A recent study found that climate change is disrupting the complex systems underlying global fisheries, with 8% of fish populations experiencing significant negative impacts. The greatest losses in productivity were seen in regions such as the Sea of Japan and North Sea, while the Labrador-Newfoundland region saw significant gains.
Researchers found that icefish have evolved transparent blood, increased energy production, and specialized proteins to protect against cold damage. These adaptations enable them to thrive in Antarctica's frigid waters.
A new study found that marine wildlife near coral reefs respond differently to climate change events depending on their distance from the mainland. Surveys of fish and coral habitats showed an increase in herbivorous species in middle- and outer-shelf reefs after severe environmental disturbances, but not near the coast.
Climate change is causing fishing communities to adapt by changing their fishing locations and strategies. Large North Carolina-based trawl vessels are now sailing 250 miles north to catch summer flounder and Atlantic croaker off the coast of New Jersey.
Scientists have developed a methodology to assess fish stocks by combining modern underwater surveys with historical records dating back to the 8th Century AD. The analysis found that some previously classified as
A recent study by University of Guelph researchers found a 32% seafood mislabelling rate, with the problem persisting throughout the supply chain. The mislabelling rate was highest at retailers, indicating the role of distribution and repackaging in the issue.
Six new species of Ancistrus catfish with unique features such as tentacles and armor-like plates have been discovered in the Amazon rainforest. The findings highlight the need for conservation efforts to protect these creatures and their habitats from threats like habitat destruction, deforestation, and gold mining.
Researchers used scavenger study to find evidence of wildlife diversity in Chernobyl Exclusion Zone. The team observed 10 mammal and five bird species using fish carcasses as bait.
A new study found that warmer water temperatures combined with low-level chemical exposure influence the expression of genes in the offspring of a North American fish species. The finding threatens organisms sensitive to water temperature and highlights the need for reevaluating regulatory decisions based on short-term testing.
Researchers have solved a decades-long riddle about Australia's threatened Lungfish species by discovering its unique life span of up to 80 years. By analyzing Carbon 14 levels in scales, the team was able to determine the age of individual fish and debunk concerns about an ageing population.
Researchers found that 'cuckolder' males and the mother's social partner were more related than expected by chance. This phenomenon allows for inclusive fitness benefits to mitigate costs of cuckoldry, where closely related males work together to compete against host males.
A study by University of Delaware researchers reveals that larger-bodied fish, like juveniles, associate with anemones for protection, while smaller species partner with them throughout their lives. This mutualistic relationship is driven by predation and helps fish avoid predators in ocean reefs.
Researchers have shown that fish otoliths record information on fish metabolism, providing a unique window into how species adapt to changing conditions. By analyzing the carbon isotopes in otoliths, scientists can infer the fish's activity level and metabolic rate, offering new insights into climate change impacts.
Researchers used augmented reality to investigate the link between active sensing movement and sensory feedback in weakly electric fish. The study found that subtle active sensing movements are controlled by sensory feedback, enhancing sensory information reception. This discovery may have implications for neuroscience and robotics.
Researchers are conducting a comprehensive study of the walking cavefish to better understand the 'fin-to-limb' transition that enabled the first vertebrates to walk on land. The project aims to identify the genomic, morphological and mechanical qualities that enable fish to walk on land.
A comprehensive study of the blind cavefish's vertebrate-like pelvic girdle and phylogeny may provide insights into the evolution of appendages, pelvis, and vertebral column needed for terrestrial life. Researchers will examine the morphological, genomic, and mechanical qualities that enable fish to walk on land.
A new study reveals that coral reef fish species at the extremes of the food chain, such as strict herbivores or predators, evolve faster than those in the middle with varied diets. This finding has valuable conservation implications for managing fisheries exploitation and preserving functional diversity on coral reefs.
Researchers found the Conchos shiner in the mainstream of the Rio Grande at a site previously thought to be free from non-native species. The discovery highlights the need for further research and conservation efforts in the Rio Grande drainage system.
Scientists have observed a previously unrecognized swarming behavior in Spironucleus vortens, a single-celled parasite infecting ornamental fish. The swarm exhibits highly coordinated movement, suggesting interactions between the flagellates, which may contribute to its life cycle and lead to novel treatments.
Researchers at the University of Konstanz have found a novel genomic mechanism for sex determination in swordtail fish, resulting from decades-long hybridisation experiments. The study reveals that introgression and selection of pigmentation phenotypes contribute to the rapid evolution of a new sex chromosome.
The California Academy of Sciences has added 229 new plant and animal species to the family tree, including 120 wasps, 34 sea slugs, and seven flowering plants. These discoveries were made over five continents and three oceans, highlighting the vast and dynamic planet's unexplored places.
Researchers discovered a mechanism explaining positive correlations in natural populations, highlighting the importance of food web conservation. Complex food webs mitigate environmental variability and make ecosystems more predictable.
The study warns that a temperature increase of over 1.5°C will cause dramatic worsening in the survival chances of offspring for important fish species, including Atlantic cod and polar cod. This could lead to a significant loss of breeding grounds and population decline, with severe consequences for Arctic seals and seabirds.
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.
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.
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 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.