Articles tagged with Marine Fishes
Researchers documented an unusual feeding aggregation of oceanic whitetip and tiger sharks scavenging concurrently on a carcass off the coast of Hawaii's Big Island. The study reveals that despite their different habitats, these shark species can peacefully coexist and establish a social hierarchy.
Clownfish have been shown to shrink in response to heat stress and social conflict, increasing their survival chances by up to 78%. The study also reveals that coordination with breeding partners is crucial for surviving heatwaves when shrinking.
Research shows fish species like Atlantic cod and hagfish contribute significantly to seabed ecosystem health. Bioturbation impacts on organic carbon storage and greenhouse gas absorption are crucial for understanding ocean's role in climate change.
A new study reveals the global distribution of FMFO factories, highlighting Peru's high production and potential environmental impacts. The study provides a starting point for addressing these issues through more transparent data, regulation, and sustainable practices.
Researchers found that some shark bites are motivated by self-defense when sharks feel threatened or provoked. This discovery challenges the common perception of sharks as mindless predators and highlights the importance of respecting their space.
A mysterious parasite is devastating fish farms globally, causing £50 million in losses annually. Researchers have discovered a new gene regulation process that could lead to the development of gene-based vaccines.
Marine turtles' shells exhibit complex trade-offs between toughness, stiffness and flexibility to protect against predators while optimizing movement. The shell's design accommodates demands of both survival and efficient locomotion in aquatic habitats.
A study reveals widespread overlap between feeding grounds for seabirds, marine mammals, and regions with high wind potential. Researchers propose developing risk maps to predict conflicts and recommend expanding marine protected areas and strengthening spatial planning tools.
A recent study published in the ICES Journal of Marine Science reveals that bigeye tuna, yellowfin tuna, and swordfish source between 50-60% of their diet from the twilight zone. This suggests that any changes to the twilight zone's food web could have profound implications for these fisheries.
Researchers studied the organs producing light in Vinciguerria mabahiss, finding they use photophores as counter illumination to break up silhouette and camouflage from predators. The fish produces blue light through a bacterial reaction, using reflective cells and a lens to direct it.
A new study found that the loss of Great white sharks from False Bay has triggered significant shifts in the marine food web. The absence of apex predators led to an increase in sightings of Cape fur seals and sevengill sharks, which coincided with a decline in species they rely on for food.
Scientists tracking great hammerhead sharks in the Bahamas have discovered that some individuals choose to stay at home, rather than migrate, due to the availability of resources and favorable environment. This finding provides crucial information for protecting the critically endangered species.
Researchers have found that chemicals used to preserve shark jaws do not affect isotopes, enabling the use of preserved jaws for revealing what sharks eat and where they feed. This study contributes valuable insights to the field of stable isotope analysis in shark and ray teeth.
Researchers confirm that some returning salmon to Putah Creek are born there, marking a significant finding for restored streams worldwide. The study's results show that restored waterways can help restore and even create salmon runs.
Despite decades of overfishing warnings, Southeast Asia's catch fisheries have maintained biodiversity and ecological health, with a three-fold higher ratio of underfished stocks compared to the global average. This study highlights the benefits of non-species-selective multispecies fishing practices in promoting sustainable fisheries.
Thorny skates exhibit a unique size discrepancy, with small and large varieties coexisting along the North American coast. A new study reveals that COVID-19 restrictions led to an abundance of genetic data, allowing researchers to uncover the secret behind the size difference.
A recent study found that intense east coast low storms and marine heatwaves caused the deaths of over 200 weedy seadragons on Sydney beaches. The extreme weather triggered record-breaking waves and rainfall, which seadragons struggle to handle.
A recent study published in Cell reveals the evolutionary history and genetic mechanisms that enable deep-sea fish to survive in extreme conditions. Researchers found two distinct pathways of evolution involving 'ancient survivors' and 'new immigrants', as well as a newly discovered genetic mechanism for pressure adaptation.
A new neural network can identify fish activity on coral reefs by sound, faster than human experts, enabling real-time monitoring of fish populations, species identification, and disaster response. This technology has the potential to revolutionize ocean monitoring and research.
Researchers used a novel approach to estimate megalodon's body length and shape, finding it closer in shape to a lemon shark or large whale. The study suggests the prehistoric predator may have reached about 80 feet in length and weighed an estimated 94 tons.
Researchers found that some coral reef fish exhibit higher thermal tolerance in the Arabian Gulf's variable thermal environment, but overall biodiversity is lower. This suggests that only certain species can adapt to environmental changes, and highlights the need for further investigation into climate change impacts.
Researchers capture narwhals using their tusks to investigate, manipulate and influence the behavior of Arctic char fish. The study reveals first evidence of likely play, social learning and personality differences among individual narwhal.
Citizen science data from scuba divers reveals distinct seasonal patterns among shark species, including hammerhead sharks and tiger sharks. The study also identified changes in shark populations over time, with some species increasing in abundance while others decrease.
Anemonefish provide food to bubble-tip anemones through active provisioning, which increases the host's growth rate. This symbiotic behavior is crucial for the anemonefish as it benefits them by making their hosts larger.
Researchers discovered synovial joints in ancient fish lineages, suggesting these features first evolved in jawed vertebrates. The study's findings shed light on the origins of humans' flexible joints and provide critical information for research into vertebrate skeletal architecture.
A new USF study emphasizes the importance of protecting coastal marine ecosystems, particularly tidal flats, which provide critical habitats for fish populations and contribute to global seafood supplies. The team recommends adopting core strategies for boaters, anglers, wildlife managers, and policymakers to prioritize preservation.
A new study suggests that up to 70% of suitable habitats for the critically endangered whitefin swellshark will be lost over the next 75 years due to predicted ocean changes. The researchers believe that Australia's proactive conservation measures, such as marine protected areas, offer hope for the species' survival.
Citizen scientists can join world-renowned microplastic expert Professor Claire Gwinnett on an expedition to monitor microplastic pollution in basking shark feeding sites. The expeditions will use a new app with AI analysis to categorize plastic samples, providing valuable data on microplastic levels and health impacts on sharks.
Researchers found that seamounts support vast numbers of predators, including sharks and tuna, with shark biomass being 41 times higher at shallow seamounts. The study suggests that seamounts serve as 'hubs' for predators to gather, socialize, mate, or rest, and concentrate food in predictable spots.
A global real-time monitoring system is being developed to track bleaching severity, crown-of-thorns starfish populations, disease outbreaks, and reef fish abundance. The integrated system aims to provide predictive models for conservation efforts, enabling earlier intervention.
The International Shark Attack File reported only 47 unprovoked shark bites globally in 2024, down from 22 in 2019. Four fatalities occurred last year, with the US having the highest number of unprovoked bites, accounting for 28 incidents.
Research shows that global warming can benefit shark and ray populations due to increased temperatures and shallow water areas, while high CO2 levels have a detrimental effect. The study's findings suggest that conservation efforts are necessary to protect these species and their ecosystems.
Sockeye salmon raised through land-based aquaculture have reached their shipping stage, marking a significant leap toward the world's first business-based commercial farming of this species. The project's success is attributed to the combination of Okayama University of Science's expertise and NTT East Japan's ICT solutions.
A study published in One Earth found that smaller fish species are more nutritious, lower in mercury, and less susceptible to overfishing. This discovery has implications for biodiversity conservation and public health worldwide.
New research reveals significant transformations in Great Barrier Reef fish communities, with changes in species richness and composition driven by coral diversity rather than coral cover. The study's findings raise questions about the shifting latitudinal diversity gradient and its implications for ecosystem functioning.
A USC Stem Cell study found that the mammalian outer ear evolved from cartilaginous gills in fishes and marine invertebrates. The research used gene control elements to show a connection between gill and ear development.
A new study examines legislation and conservation efforts in the Mediterranean region to protect over 80 shark and ray species. The research reveals substantial differences in countries' efforts, with European Union countries leading implementation of measures.
Researchers found 1,806 suspected particles across 180 samples of Oregon's marine and freshwater species. Pink shrimp had the highest concentrations, while Chinook salmon had the lowest. The study highlights a need for technologies to reduce microfiber pollution entering the environment.
A new study found that a unique population of large fish-eating herring has evolved in the Baltic Sea, exhibiting faster growth rates and lower levels of pollutants. These herring have adapted to the brackish water by switching from plankton-eating to a fish diet, with potential benefits for human consumption.
A new study published in Marine Resource Economics found that a decline in healthy coral reefs can lead to substantial losses in fisheries. The research analyzed nine fisheries dependent on Australia's Great Barrier Reef and predicted lower fishing yields if the restoration of coral reefs is not prioritized.
A recent study by UMass Amherst and international partners found that giant trevally sport fishing in Seychelles is sensitive to catch-and-release pressure. The research used acoustic telemetry and mark-and-recapture programs to track fish behavior, revealing potential unintended consequences of the practice.
Researchers at Nagoya University have discovered a unique motor control system in frogfish's first dorsal fin, enabling their 'fishing' behavior. The study reveals how motor neurons changed location as their function shifted from swimming to hunting.
A recent study by researchers at the University of Hawaii at Manoa has shown that large marine protected areas can have positive impacts on fish populations, including increases in catch rates for tuna. The study analyzed publicly available data from nine LSMPAs across the Pacific and Indian oceans.
A new study reveals that overfishing has caused chondrichthyan fish populations to decline by more than 50% since 1970. The risk of extinction for these species has increased by 19%, with the largest species facing elimination of up to 22% of ecological functions.
Researchers discovered a species of damselfish actively eating gnathiid isopods, which are common reef parasites, to protect their young. This unique 'great fish parenting' behavior increased the survival rate of juvenile fish by three times.
Virginia Tech researchers successfully tagged a young Mediterranean shortfin mako shark, gathering valuable data on its movements and habitat usage. The shark traveled over 750 miles in 54 days, suggesting that protecting nursery areas may not be enough to prevent its decline.
Researchers observed coordinated attacks by killer whales on whale sharks in the Gulf of California, suggesting specialized hunting techniques. The pod targeted the whale shark's ventral side, exploiting its vulnerability, and extracted nutrient-rich organs from the liver.
Researchers found neurotransmitters GABA and choline in the venom of estuarine and reef stonefish, which can modulate cardiovascular function. The discovery could aid in targeted treatments and venom-derived compound development for drug discovery.
Researchers develop counterillumination technology to trick great white sharks' visual systems, making them less likely to attack humans. By using LED lights in specific patterns and brightness, the device disrupts the shark's silhouette, reducing the risk of bites.
A mathematical model developed by researchers at Tokyo Metropolitan University predicts how the environment affects the life choices of salmon, revealing a complex impact on population evolution. The model correctly forecasts changes in migration patterns in response to environmental conditions, shedding light on eco-evolutionary respo...
Scientists used acoustic mapping technique to track vulnerable capelin species and observe massive predation event involving Atlantic cod. The study revealed that as climate change causes Arctic ice sheet to retreat, capelin will be more stressed and vulnerable to natural predation events.
Research reveals two species of sardine in the California Current, with Japanese sardines arriving on the West Coast around 2022. The discovery highlights the impact of marine heatwaves and changing ocean conditions on fish distributions.
A research team, led by Francesco Ferretti, located signs of white sharks at four sites in the Sicilian Channel, a stronghold of the endangered species. The team used improved methods and technologies, including eDNA sampling and camera traps, to detect the presence of the sharks.
Research finds ocean connectivity impacts herbivorous reef fish groups, critical to coral reef resilience, and sea surface temperature and chlorophyll levels predict fish distribution. Protecting reefs is essential for rapidly growing communities dependent on reefs, vulnerable to climate change.
A new study by Harvard researchers finds alarmingly high PFAS concentrations in fish tissues even up to 8 km from the military base. The results underscore the urgent need for more comprehensive monitoring of PFAS in aquatic ecosystems, particularly in regions where freshwater fishing is an important food source.
The study, led by an international team of scientists, suggests that global fish farming relies on significantly larger quantities of wild-caught ocean fish than previously calculated. The findings indicate a 27-307% higher ratio of wild fish inputs to farmed fish outputs, with some species relying on twice the farmed biomass produced.
A new study reveals that decades of human activities have reduced Chinook salmon size and disrupted their ability to spawn successfully. Effective management strategies can involve adjusting hatchery or harvest practices, restoring spawning sites with smaller river gravel, and protecting ecosystems.
A new study published in Nature Climate Change predicts that global warming will lead to increased co-occurrence of whale sharks and large ships, potentially increasing the likelihood of ship strikes. The research found that some newly suitable habitats overlapped with busy shipping routes, threatening the already endangered species.
A recent study from the University of Sydney found that international conservation efforts account for approximately 10 percent of fish biomass on coral reefs. Increasing Marine Protected Areas and implementing fisheries restrictions are key to sustaining fish populations, but more work is needed to meet the 30x30 initiative.
The study reveals that sea robin legs are sensitive to both mechanical and chemical stimuli, and are covered in papillae similar to human taste buds. The research provides new insights into the evolution of this unique trait, which could offer clues about how humans developed bipedalism.