Articles tagged with Marine Fishes
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A new study reveals a surprising trend in global fishing industries: the decline of catch per fisher since the 1990s, despite increasing numbers of fishermen. This decrease has significant implications for food production efficiency, marine ecosystems, and fishing communities.
A comprehensive digital database has been created to document over 20,000 species known to produce sounds underwater, including 729 confirmed and 21,911 likely producers. This inventory can revolutionize marine science by providing valuable insights into species interactions and environmental impacts.
The BioSPACE project aims to provide farmers, environmental agencies, and water-reliant industries with portable sensors to rapidly detect germs that threaten marine and freshwater life. The economic burden caused by waterborne diseases exceeds $3 billion in direct health care costs each year in the United States.
Researchers found that specific algae from the genus Breviolum help Caribbean octocorals withstand heat waves and bleaching events. The study provides clues for the future of coral reefs and highlights the need for further research to better understand the ecosystem.
Rising sea temperatures in the Mediterranean may drive juvenile bluefin tuna out of their nurseries, where they'll be caught in existing fisheries, requiring adaptions to fishery methods. The research found that waters above 28 degrees Celsius will adversely impact bluefin growth.
A new study reveals that shipwrecks are providing a sanctuary for fish, corals, and other marine species in areas open to destructive bottom towed fishing. Marine life density is significantly higher within wreck sites than in control areas.
Researchers have developed a fully-enclosed aquaculture system that can be completely controlled, eliminating water quality and food safety concerns. The system produces nutrient-rich protein-rich 'Naked Clams' that are faster-growing than mussels and oysters, with higher Vitamin B12 levels.
A recent study found that half of commercial caviar products in Europe are illegal, and some don't contain any trace of sturgeon. The research analyzed DNA and isotope patterns on 149 samples of caviar and sturgeon meat, revealing widespread poaching and violation of trade laws.
A new study sheds light on the feeding preferences of herbivorous fishes and sea urchins, revealing their combined impact on macroalgal communities. Key findings suggest that these herbivores play a vital role in reducing macroalgal cover and promoting coral reef recovery.
A study by Universitat Autonoma de Barcelona found that all aquatic species in river mouths are contaminated with microplastics. Molluscs were the most affected, and nanoplastics posed a greater risk to aquatic organisms due to their ability to pass through cellular membranes.
A new study has found that a relatively ancient shark species, the smalltooth sand tiger, exhibits anatomic features suggesting regional endothermy. This discovery suggests there may be more warm-blooded sharks than previously believed, and potentially poses significant conservation implications for these species.
Researchers studied shark and skate skin mucus to understand its unique biochemistry. They found a thin, neutral mucus layer with properties similar to human mucus, suggesting potential biomedical applications for wound care and treatment.
Researchers at UMass Amherst have tracked tarpon migration patterns using acoustic telemetry, revealing two distinct subgroups of the species. The study, which gathered data over five years, has significant implications for conservation efforts, as tarpon are listed as vulnerable due to fishing, habitat loss, and degraded water quality.
A study by the University of Washington and NOAA found that upgrading a culvert in Washington improved fish traffic for four species of interest: cutthroat trout, coho salmon, rainbow trout, and sockeye salmon. Meanwhile, a smaller culvert replacement had less impact on fish populations.
Researchers have documented the development of bonnethead sharks, showing how their skulls widen and distort to form a hammer-like shape. The study provides insight into the formation of this unique feature, which is thought to amplify their field of vision and ability to detect prey.
Scientists validate a long-held ecological distribution theory, but find it doesn't hold true for islands with human habitation. The findings suggest that traditional models of the natural world may no longer be valid in the face of mounting local human impacts.
The discovery of rare fossils in 130-million-year-old rocks reveals the earliest evidence of deep-sea fishes, dating back to the Early Cretaceous period. The findings shed light on an obscure chapter in the history of life on Earth, forcing scientists to reconsider factors that triggered vertebrate colonization of the deep sea.
A new study analyzes relationships between body size, trophic level, latitude, and depth for 5,619 marine fish species. Marine fish species tend to have larger body sizes and higher trophic levels in high latitudes, while opposite patterns are observed in warmer latitudes.
A new study forecasts the impact of marine heatwaves on top ocean predators, revealing varied effects and potential redistributions across international boundaries. The researchers developed models to provide real-time predictions of how species shift during heatwaves, informing proactive climate-ready management strategies.
A Rutgers-led study found that marine heat waves have minimal lasting effects on fish communities. Fish populations can find safe havens by moving to areas with cooler water during heat waves, but the impacts vary and are unpredictable.
Researchers found that sinking culled fruit trees into the Wadden Sea boosted local marine life diversity and abundance. The study shows native biodiversity can be restored using trees as reefs.
The study, led by Professor José Manuel Guerra, reveals that gilt-head sea bream farmed in estuaries exhibit similarities to wild populations, with a rich diet and low heavy metal concentrations. This finding highlights the potential of estuaries as a sustainable aquaculture site.
Sperm and northern bottlenose whales frequently feed on live halibut escaping from a deep-sea trawler net. The study found that these whales were only spotted when the catch was Greenland halibut, not redfish or thorny skate.
Hogfish use their skin to view themselves and fine-tune color changes, a sensory feedback mechanism that lets them monitor their surroundings. Researchers have found light-sensitive opsin proteins in the skin, allowing them to capture changes in light that are filtered through pigment-filled cells.
Researchers from FAU Harbor Branch deployed an autonomous wave glider to survey marine managed areas off Puerto Rico, recording grouper mating calls and determining spatiotemporal distribution of the two species. The study highlights the importance of spatial and temporal expansion of existing regulations to protect threatened species.
A new study reveals that trumpetfish can conceal themselves by swimming closely behind another fish while hunting, reducing the likelihood of detection. This unique strategy, known as 'shadowing', uses a non-threatening species of fish as camouflage to approach prey.
Researchers at Florida Atlantic University uncover the finer-scale feeding patterns of the whitespotted eagle ray, revealing a significantly broader diet than previously described, with high proportions of cockles and wedge shells. The study's findings suggest that these rays can play a facilitative role in reducing predation threats f...
Two studies by UPV/EHU researchers analyze recent and past oceanographic information off the Basque coast based on microfauna present in sediments. The research found that planktonic foraminifera assemblages are good indicators of ocean currents and water masses reaching the Basque continental shelf today.
A new species of marine cryptofauna, Gnathia jimmybuffetti, was discovered in the Florida Keys. The roughly three-millimeter-long isopod has been characterized using photomicrographs and genetic sequencing, providing valuable insights into coral reef biodiversity and parasite impact.
Researchers are exploring the Pacific Northwest using ROVs to locate ghost shark nesting grounds and study their developmental processes. They hope to find embryos to learn about the unique morphologies of these fish.,
Researchers found that filter-feeding basking sharks keep their core regions warmer than the water, like fast-swimming apex predators. This discovery has implications for conservation and raises ecological questions about metabolism and distribution shifts during climate change.
Research found that warmer ocean temperatures and marine heatwaves lead to increased overlap between Chinook salmon and Pacific hake, raising the risk of salmon bycatch. The study used 20 years of data and modeled behavioral changes to show how salmon move lower into the water column during higher temperatures.
Researchers investigated the role of thyroid hormones in coordinating the metamorphosis of clownfish, discovering a strong interaction between metabolic processes and hormone regulation. Thyroid hormones play a critical role in timing the transformation and supporting energy demands during the journey.
Researchers from the University of Portsmouth found that biodegradable fishing gear (BFG) does not significantly reduce the cost of ghost fishing due to decreased fishing efficiency. The study suggests that implementing BFG could still have economic benefits, but only if it can achieve similar fishing efficiency as traditional gear.
A Hong Kong University of Science and Technology team developed a technique to analyze fish DNA, revealing the complex relationships among marine species and how global warming affects them. The study found that water temperature can have both positive and negative effects on fish interactions.
Researchers used coastal surveys from 1993-2021 to find a dramatic delayed effect of warmer oceans on seabird mortality. Massive die-offs occurred roughly once per decade, with five events exceeding a quarter million birds between 2014 and 2019.
A study examines over 20,000 newspaper articles from Brazil to understand changes in marine biodiversity over the past 180 years. The research found that high-trophic level species decreased in frequency while low-level organisms increased, reflecting broader trends of overfishing.
The study used a battery-powered acoustic array to record Goliath grouper sounds at an artificial reef, assessing their presence by measuring acoustic activity and habitat distribution. The results showed that the model can be used to automatically process large amounts of acoustic data and provide detailed movements of marine organisms.
A new study published in the Proceedings of the National Academy of Sciences confirms that the Megalodon shark was warm-blooded, with a body temperature estimated at around 27°C. This discovery provides empirical evidence for the extinct species' internal heat production, shedding light on its biology and ecological role.
A new analysis reveals megalodon's ability to regulate its body temperature, with temperatures up to 13°F warmer than surrounding water. This suggests the shark was warm-blooded and had an evolutionary advantage that may have contributed to its extinction.
Researchers estimate that gray whales off the Oregon Coast consume millions of microparticles per day, primarily from zooplankton and fish. The study suggests that these high loads of microfibers may be affecting the health and behavior of the whales, with potential consequences for their populations.
New study finds that limiting human activity in parts of the ocean can enhance marine environment health and benefit nearby coastal communities. MPAs with strict fishing restrictions sustain fisheries and improve income and food security for nearby residents.
Teleost fishes have developed distinct ways to generate heat, with mackerel tuna utilizing muscle differentiation and sailfish relying on ATP decomposition. These findings suggest that organisms adapt to achieve endothermy through different pathways, maximizing existing biological foundations.
The study reveals significant declines in fish species, particularly sharks and rays, linked to human impacts. Archaeological analysis provides insight into lost environments and informs conservation baselines.
A study published in PLOS Biology found that polar fish reproduce later and produce more eggs than tropical fish, confirming model predictions. As a result, polar fishes tend to produce more eggs than tropical fishes.
Coral reef fish larvae undergo significant physiological changes as they transition from open ocean swimming to settling on the reef floor. The study found that gene activity changes play a crucial role in adapting to hypoxic environments at night, allowing the fish to survive and thrive.
A study by McGill University and University of British Columbia found that the planet's biomass is concentrated in organisms at either end of the size spectrum. The researchers discovered a universal upper limit for maximum body size across multiple species and environments, with similar sizes reached by trees, fish, and other organisms.
Researchers highlight the need for a coherent international framework for decommissioning offshore structures due to limited evidence on their environmental impact. The study emphasizes the critical need for consensus on future approaches as an estimated 1,800 offshore wind turbines will require decommissioning by 2030.
Researchers found high levels of coral pathogens in fish that graze on algae and detritus, while those that eat coral had beneficial bacteria in their feces. These findings suggest that corallivore feces could act as a 'coral probiotic,' potentially benefiting coral reefs.
Harmful fisheries subsidies support fishing in waters outside jurisdictions of their home nation, impacting developing countries and the environment. These subsidies disproportionately affect marginalized communities and lead to food insecurity and economic dependence on fishing.
A new article in Science challenges the notion that fish growth slows down when they spawn. Research by Dr. Pauly and Dr. Froese found that fish actually grow faster after reproducing, as their energy is redirected towards other activities. The study also notes that reproduction does not impact growth in mammals.
Researchers recorded and identified mating and feeding sounds of 21 ocean species, including those influenced by the moon. The study's findings will contribute to the development of the Global Library of Underwater Biological Sounds (GLUBS), an open-access online platform for monitoring changes in marine environments.
A study found that more than 70% of Chinook populations have declined over the last 50 years, but some populations are recovering due to their diverse migration and spawning strategies. Cold water and marine habitats play a key role in their success, particularly for fall and summer stocks.
During Hawaii's COVID lockdown, researchers found that species displaced by human presence moved back into shallow habitats, increasing fish biomass and predator populations. However, when tourism resumed, predators returned to deeper waters, reducing biomass and habitat use to pre-pandemic levels.
Scientists discovered that feces from coral-eating fish contain beneficial microbes that help coral thrive, while feces from algae-eating fish cause damage. The study suggests that corallivores may contribute to natural dispersal of 'coral probiotics', promoting reef health.
A toolkit for coral gardening could accelerate reef recovery in Saudi Arabia and globally. The Maritechture TM system includes tiles, stackable crates, and coral pods to create artificial reefs that attract natural coral settlement.
Researchers highlight gaps in tritium studies, focusing on species uptake and human health risks through the food chain. A global assessment is needed to minimize tritium's impact on individual species and the environment.
A recent study on the pike icefish revealed significant genetic changes as it migrated from Antarctic to temperate waters. The researchers found divergent genes associated with the physiology that needed to change in response to the new environment, including mutations in the antifreeze glycoprotein gene.
Recent climate change has led to an expansion of marine predator ranges into Arctic waters, resulting in increased species richness and altered community compositions. The study found that apex predators such as whales and sharks have migrated northwards, while mesopredators like fish and crabs showed more limited range shifts.
A new study reveals a surprising exception to the rule of uniformity across the Indo-West Pacific coral reef ecosystem. Chlorodielline crabs with overlapping ranges have uniquely shaped gonopods, but otherwise appear identical, suggesting genetic divergence in different geographic areas.