Articles tagged with Marine Fishes
A UCLA-led team of biologists reports that a six-mile-wide asteroid crash 66 million years ago created an enormous evolutionary void for marine fish to diversify. Today's rich biodiversity among marine fish shows the fingerprints of this mass extinction, with six major acanthomorph groups producing almost all marine fish diversity.
Ocean conditions off the US West Coast are returning to average after a marine heat wave, but salmon catches remain depressed. Feeding conditions have improved for sea lions and seabirds, while plankton species have shifted back towards fat-rich, cool-water species beneficial for fish growth.
A team of scientists has confirmed a new species of sixgill sharks in the Atlantic Ocean, based on genetic testing. The discovery was made using mitochondrial genes and found significant differences between the Atlantic and Pacific/Oceanic species.
A record-breaking marine heatwave, lasting 251 days and seven times larger than Tasmania, was driven by a surge of warm water in the East Australian Current. Climate change made this event several times more likely, with temperatures 2.9°C above normal.
A newly discovered ancient reptile from Switzerland shows its unique scale armor for the first time. The Eusaurosphargis dalsassoi has a life on land skeleton despite being found with fish and marine reptiles.
A study highlights challenges and opportunities of fishery management in China, promoting institutional reform for sustainable marine resource management. The researchers recommend new institutions, secure fishing access, policy consistency, educational programs, and increased public access to scientific data.
A new species of twirler moth, Neopalpa donaldtrumpi, has been discovered in California and Baja California, Mexico. The moth's yellowish-white scales on its head were used to create an amusing reference to Donald Trump's hairstyle.
A joint study by Chinese and international researchers recommends new institutions for science-based fisheries management, secure fishing access, and policy consistency across provinces. The authors believe that China's 13th Five-Year Plan provides a policy platform for the protection of marine ecosystems and restoration of fisheries.
Scientists have discovered a new species of coral-reef fish, Tosanoides obama, that lives exclusively within the Papahānaumokuākea Marine National Monument. The fish is special because it is the only known species of coral-reef fish endemic to the Monument.
A new study by the University of Southampton uses jellyfish to track marine animals' movements and locations, providing a powerful tool against food fraud. The research can also be used to maintain healthy sustainable fish stocks and ensure consumer confidence in marine eco-labelling.
A recent study reveals that marine fisheries catches in the Turks and Caicos Islands are being under-reported by 86%, threatening the marine environment and local livelihoods. The research calls for urgent policy action to establish more accurate catch limits, taking into account both commercial and local consumption of seafood.
A new species of goby, the Godzilla goby, has been discovered in the southern Caribbean by the Smithsonian Institution's Deep Reef Observation Project (DROP). The fish features bright yellow and orange colors, a large head, and unique dental structure.
A study published in PLOS ONE found that bioluminescence may have evolved independently 27 times in 14 major fish clades, indicating its importance for fish survival. The researchers suggest that bioluminescence is a useful trait that has led to the diversification of many fish species.
A study finds that fishing closures in Indonesia's shark sanctuary increase shark abundance, while also forcing fishermen to fish in unprotected areas, often turning to illegal practices. Ecotourism may provide an alternative livelihood, but its impact on fishing pressure and illegal activity is uncertain.
Bioluminescence has evolved independently 27 times in 14 major fish clades, underscoring its importance to vertebrate fish in the deep seas. The phenomenon is found throughout the ocean and is used for signaling, camouflage, and species recognition.
A recent study by Newcastle University has found that finfish populations have declined drastically over the last 65 years due to uncontrolled fishing, with five species now fighting for survival. The research highlights the urgent need for action to protect coral reefs and the ecosystem as a whole.
A combined dietary supplement of marine fish oil, cocoa extract, and phytosterols could potentially prevent atherosclerosis by inhibiting key processes associated with its progression. The study found that combining these ingredients helped halt the progression of atherosclerosis in cell-based models.
Most US marine fish and invertebrate species are vulnerable to climate change, with some more resilient than others. The study ranks species based on their vulnerability, predicting widespread distribution shifts and potential impacts on abundance and productivity.
New research published in Environment & Behavior found that watching aquariums and fish tanks can improve physical and mental wellbeing. The study showed noticeable reductions in blood pressure and heart rate, with higher numbers of fish helping to maintain attention for longer.
The expansion of no-take marine reserves in Australia's Great Barrier Reef Marine Park has led to an increase in fish numbers and sizes, particularly coral trout. However, researchers emphasize that no-take reserves alone are not enough to protect the reef from other threats such as pollution, sedimentation, and climate change.
A new study reveals that Gentoo penguins are better adapted to deal with climate change than Chinstrap penguins, which may be struggling due to declining krill populations. The research suggests that Gentoo penguins' diverse and flexible diet is helping them thrive in a changing environment.
Researchers found hundreds of juvenile whale sharks gathering on coral reefs near Saudi Arabia, providing a rare insight into their daily lives and movements. The study tracked the sharks' movements over years, revealing frequent deep dives and a sex ratio of 1:1 at the site.
A new species of sea bass was discovered off the coast of Curacao after DNA barcoding revealed a match between its larval stage and adult, previously unknown species. The discovery highlights the importance of exploring underexplored deep-reef ecosystems in the southern Caribbean.
A comprehensive review of global marine turtle fisheries reveals that over 42,000 turtles are caught annually through legal means. This number is largely driven by the green turtle species, with the majority coming from the Caribbean and Indo-Pacific regions.
The Wildlife Conservation Society has improved African basket traps with escape gaps, reducing bycatch and increasing fish size. The new design caught larger fish while allowing undersized and non-target species to escape.
NOAA's Marine Debris Program awarded $967,000 to 11 groups for locally driven marine debris prevention and removal projects. The projects will remove derelict fishing nets, litter, lumber, tires, and other harmful marine debris from shorelines and coastal waters.
Researchers found that photochemical reactions break down mercury at the surface, but it's converted to its toxic form at deeper depths. This process affects ocean fish and the human seafood supply, with implications for reducing mercury emissions.
Researchers at the University of Maryland Center for Environmental Science have successfully developed a completely vegetarian diet that supports fast-growing marine carnivores like cobia and gilthead sea bream. This breakthrough could significantly ease aquaculture's reliance on wild-caught fish, making the industry more sustainable.
A new study published in PLOS ONE found that winter flounder populations in Long Island's bays are experiencing severe inbreeding due to low effective numbers of breeders. This has significant implications for fisheries management and the long-term survival of these marine fish.
A Smithsonian scientist has found that similar color patterns in fish larvae indicate a closer evolutionary relationship among species than their adult forms. The research, published in the Zoological Journal of the Linnean Society, reveals phylogenetic connections between marine fish species.
A new study developed by Scripps Institution of Oceanography argues that problems lie in seeking answers one factor at a time, as scientists have done for decades. The researchers argue that using novel mathematical methods can help avoid misleading conclusions by considering dynamic linkages between factors.
Researchers used acoustic monitoring to record cod grunts in the wild for the first time, finding that male cod produce low-frequency sounds during spawning season. The study provides insights into cod behavior and distribution, informing conservation efforts.
The NOAA report reveals that 'no-take' protections in the Tortugas Ecological Reserve have boosted fish populations and fisheries, including a resurgence of spawning mutton snapper. Commercial catches of reef fish have increased without financial losses for regional fishers.
A network of marine zones in the Pacific Ocean could significantly improve numbers of heavily overfished bigeye tuna and local economies. The study found that restricting longline fishing in tuna-spawning areas and managing fish-aggregating devices are key measures to effectively conserve Pacific bigeye tuna.
SeaSketch, the next-generation MarineMap program, will enable worldwide stakeholders to create plans protecting marine life based on scientific values and governmental policies. The tool's launch in New Zealand and other countries aims to address ocean conservation planning, with participation from top researchers and organizations.
Researchers detected eight high-trophic level marine fish in commercial aquaculture feed, including Peruvian anchoveta and Pacific cod. The study suggests that aquaculture contributes to overfishing by feeding farm fish with wild species.
University of Miami graduate student Sean Bignami has been awarded a $5,000 scholarship from the Guy Harvey Ocean Foundation to study the effects of ocean acidification on large marine fish. He plans to share his research with decision-makers and engage in outreach programs to promote public awareness of marine science.
Researchers argue that inland fisheries can be protected by extending sustainable seafood initiatives to freshwater species. Modified approaches would be needed due to smaller and more concentrated fisheries in developing countries.
Three NOAA scientists, James Morris, Erin Oleson, and David Richardson, have been recognized for their outstanding work in ecology, whale and dolphin research, and fishery dynamics. Their research has significantly advanced our understanding of invasive species, marine conservation, and sustainable fishing practices.
North Atlantic right whales in Cape Cod Bay are at high risk of being struck by boat propellers while feeding on copepods, which school just below the surface. Researchers have found that these whales spend most of their time between the surface and 13 feet below, making them invisible to boats.
A recent study published in Oecologia sheds light on the dispersal of marine fish larvae, crucial information for designing marine protected areas. Researchers found that larval fish traveled an average distance of 77 km from their home reef, with some traveling over 200 km.
Research at the University of Strathclyde found that seabed-living fish in the Firth of Clyde have reached their highest level since 1927. Most fish caught are too small to be landed due to changes in species composition and size.
The California Academy of Sciences is conducting a comprehensive survey effort in the Philippines to document terrestrial and marine life forms. The expedition aims to discover new species, map their distribution, and inform conservation decisions.
Researchers found that fish exposed to speargun fishing are wary and keep their distance, fleeing earlier than those in protected zones. In some cases, the flight distance increased by 2.6 meters, putting them beyond spear range.
Research reveals fish produce fine-grained carbonates through their intestines, which are then excreted and released into the environment. This discovery sheds light on the origins of ancient limestone and chalk deposits.
A comprehensive study found that community involvement is crucial for the success of marine reserves. Residents' compliance with reserve rules was linked to ecological health and fish stocks. Community participation in setting up and monitoring reserves is vital to their success.
The National Oceanic and Atmospheric Administration (NOAA) has prohibited commercial krill harvesting in the Exclusive Economic Zone off the coasts of California, Oregon, and Washington. This rule aims to protect the krill's role as a key food source for numerous marine species, including some listed as threatened or endangered.
Scientists at the University of Iceland and Marine Research Institute report a significant difference in Darwinian fitness between shallow-water and deep-water adapted cod. The study found that intense habitat-specific fishing pressure led to rapid elimination of shallow-water fish, drastic effects on populations and fisheries.
The University of Miami's 5th annual Underwater Photography Contest attracted over 918 images from 23 countries, with winning entries chosen by a panel of experts. The Best Overall winner was Marchione Giacomo for his image of Boxer crabs, while student winners included Neil Hammerschlag and Evan D'Alessandro.
A new study reveals the remarkable ability of marine fish larvae to disperse over long distances, connecting populations across marine protected areas. The research provides critical insights into larval dispersal patterns, which affect population resilience and ecosystem dynamics.
The Marine Conservation Alliance will document its work on halibut and salmon excluder devices for trawl nets, as well as its marine debris cleanup efforts, at the American Fisheries Society Meeting in Ottawa. The MCA Foundation's cleanup work removed over 175 metric tons of plastic debris from Alaska shorelines last year.
A new digital mapping approach is being used to visualize and analyze vulnerable marine habitats, helping authorities make management decisions that balance competing interests. The method, developed by Dr. Suzana Dragicevic, uses mathematical optimization to find common ground between commercial fisheries and conservation communities.
New research by CSIRO Australia suggests that climate change is enhancing the growth of shallow-water fish species, but decreasing their growth rates at greater depths. This finding has implications for the long-term viability of deep-water stocks.
A new study from the University of North Carolina at Chapel Hill found that ocean temperature affects the distance marine larvae travel before maturing. This discovery has significant implications for managing commercially important or invasive species.
Researchers found that salmon can thrive on diets with up to 75% canola oil, meeting essential omega-3 fatty acid needs. This shift reduces contaminant accumulation and increases cost-effectiveness in aquaculture.
Dr. Pauly's research reveals that the world passed its peak fish in the late 1980s and has been gradually sinking since then. To prevent a collapse, he advocates for reducing excess fishing capacity, creating no-take zones, and enforcing sustainable fishing levels.
A study found that individual transferable quotas decreased discard rates for most species, contrary to economic models. In British Columbia waters, the system reduced marketable fish discards to negligible amounts due to 100% observer coverage. The US West Coast fishery, however, experienced higher discard rates despite trip limits.
Researchers found that warming swordfishes' eyes allows them to process visual information faster than cooled eyes, giving them a significant edge over prey. By heating their eyes, swordfishes retain the ability to spot quickly moving objects, enabling successful hunts in cold water.
The Florida manatee population is rising in some regions, with annual growth rates of 3.7% and 6.2% in the Northwest and Upper St. Johns River regions, respectively. However, the Atlantic region's estimated growth rate is 1.1%, suggesting a possible decline or stability, while the Southwest region shows a negative growth rate.
A study found 16 non-native species of fish in ocean waters off the southeast coast of Florida, released from home aquariums. Aquarium owners are often unaware of the potential pitfalls of releasing pets into the wild, and education programs can help curtail exotic species introductions.