Articles tagged with Marine Fishes
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A recent study published in Science Advances found that the most threatened reef fishes receive less attention from scientists and the public due to commercial value vs. ecological importance. Small fish families like blennies and gobies are underrepresented despite their crucial role in trophodynamics.
A study by University of Alaska Fairbanks researchers found that hatchery-raised fish are interbreeding with wild populations, reducing diversity and increasing resilience. This can have long-term consequences for wild population recruitment and adaptation to future changes.
Research predicts significant shifts in marine fish communities in the North Atlantic and Arctic Oceans as a result of climate warming. The study projects a decline in the most abundant species and an increase in species richness but with fewer fish overall.
New research reveals that artificial light at night (ALAN) attracts larval fish to artificially lit environments, reducing their chances of survival. ALAN has been shown to lower fish growth rates, metabolic rates, and overall survival, with serious consequences for fish conservation.
Researchers discovered adaptations in metabolism and swimming abilities that enable fish to survive extreme temperatures in the Arabian Gulf. The study challenges prevailing views on the 'shrinking of fishes phenomenon' and proposes a new theory on energy balance and survival.
A new Oregon State University study found that young Pacific cod in near shore safe havens were severely affected by recent marine heat waves in the Gulf of Alaska. The researchers estimated that only the largest 15-25% of the island's cod population survived, leading to significant changes in abundance, growth rates and diet.
Researchers found that removing invasive rats and restoring native vegetation could help bring back hundreds of thousands of breeding pairs of seabirds lost to tropical islands. The restored populations would have enough fish in the sea for them to hunt, supporting nearly 280,000 breeding pairs on islands with full vegetation restoration.
A new group of parasites, ichthyocolids, have been discovered in many marine fish species around the world, according to a recent study published in Current Biology. The parasite is widespread and has been found in all oceans, with potential implications for commercial fishing and oceanic food webs.
Despite improved molecular methods, trade in endangered sharks and rays has continued to rise, with 83% of detected species considered at risk of extinction. Research reveals that DNA sequencing techniques have become more cost-effective but failed to reduce the extent of species threats.
A new study found giant Atlantic bluefin tuna are spending more time in higher latitudes as the region experiences ocean warming events. The fish are normally seasonal visitors to Ireland, but climate change may alter their migration routes.
Researchers have identified the remains of a local prehistoric marine reptile as belonging to a thalattosaur, a large sea-lizard that behaved like an otter. The discovery challenges previous assumptions about its identity and provides new insights into the animal's diet and behavior.
A new study found that 62% of Marine Protected Areas (MPAs) designated to protect rare migratory fish species are outside of their core habitats. The study suggests that existing MPAs are not adequately protecting these species due to a lack of data on their distribution and habitat.
Researchers confirm Atlantic cownose ray (Rhinoptera bonasus) has made a novel migration to Bermuda, using citizen science and morphological/data analysis. The species likely resides in Bermuda for extended periods due to the islands' mild sea temperatures.
Researchers have identified heavily used shipping lanes that pass through crucial whale shark feeding grounds, posing a threat to this endangered species. Targeted measures, such as reducing ship speed, could help minimize the impact on the shipping industry while protecting whale sharks.
A global study reveals progress in marine ecosystem-based management (EBM) initiatives, but acknowledges remaining impediments such as governance, stakeholder engagement, and technology. Experts emphasize the need for political will, persistence, and strategic marketing to overcome these challenges and accelerate EBM adoption.
The disease has devastated susceptible coral species, allowing fast-growing organisms like algae to thrive. This shift in ecosystem balance poses long-term threats to marine biodiversity and coastal communities, with potential benefits including reduced competition for herbivores.
Researchers at NTU Singapore and Temasek Polytechnic develop a new, sustainable feed alternative for farmed Asian seabass, reducing reliance on wild-caught fishmeal. The single cell protein is cultivated from soybean processing wastewater, offering a promising solution to the aquaculture industry's environmental challenges.
Researchers have identified cocaine as a contaminant of concern in the Bay of Santos' water, sediments, and marine organisms. The drug causes toxicological effects in animals such as mussels, oysters, and fish, with severe bioaccumulation and ecotoxicological risks.
A study by University of Hawaii researchers suggests that revitalizing Indigenous aquaculture systems, known as loko iʻa fishponds, can increase locally available seafood production. This revival has the potential to boost local food production and provide a sustainable solution to Hawaiʻi's seafood supply.
Long-term research reveals herring arrive at least two weeks earlier in the Wadden Sea due to climate change. The consistent measurement approach allowed scientists to detect this change over a period of over 60 years.
A study found that agastric fish lack specific genes required for gastric functions, such as slc26a9, kcne2, cldn18a, and vsig1. These findings suggest a genotypic convergence where gene losses correlate with stomach loss in various fish lineages.
A University of Adelaide study found that climate change is helping tropical fish species invade temperate Australian waters. The warming current keeps baby fish warm, increasing their survival chances. As temperatures rise, these tropical fish will eventually grow to their full size and compete with native fish for resources.
In a groundbreaking study, scientists found that juvenile great white sharks prefer warm and shallow waters near the shore, often within 1 km of land. This behavior may help them evade predators and optimize growth efficiency in these nurseries.
A new study found that 29 out of 78 endemic fish species haven't been reported in museum collections since 2010, with six considered of greatest concern. The researchers highlight the need for continued monitoring and conservation efforts to protect vulnerable species impacted by human activities.
Paleontologists have unearthed what may be the largest known marine reptile, a gigantic ichthyosaur measuring over 25 meters long. The fossilized remains of its second jawbone were found on a beach in Somerset, UK, and have been identified as belonging to a new species.
Researchers found that first-generation, wild-born descendants of hatchery-origin Chinook salmon produced more adult offspring than hatchery-origin salmon, improving reproductive success. This study offers hope for recovering endangered populations using hatchery-origin salmon.
A Dartmouth-led study found that people in New England, particularly those who frequently consume seafood, face an increased risk of PFAS exposure. The researchers recommend setting safety standards to limit seafood consumption and highlight the need for more stringent public health guidelines.
Researchers at FAU's Harbor Branch Oceanographic Institute will survey Sargassum inundation sites using drones and remotely operated vehicles, then conduct aerial images and on-the-ground morphometrics. They aim to test the viability of harvesting Sargassum without harming marine animals.
Researchers found that synchronization of tail flaps in a school of fish reduces sound, with the single biggest key being alternating flaps rather than unison movement. This phenomenon could have significant implications for prey fish, allowing predators to perceive them as individual fish rather than a group.
A study analyzing canned salmon from 1979 to 2021 found stable anisakid worm levels in coho and sockeye salmon, while pink and chum salmon showed a rise. This suggests that the marine food web has adapted to changing conditions, with rising parasite levels indicating potential ecosystem shifts.
Despite being in place to rebuild fish populations, marine protected areas have flatlined or declined adult fish populations. Strong enforcement and climate-friendly design are crucial for their success.
The MIT-designed 'architected' reef could dissipate more than 95% of incoming wave energy using a fraction of the material needed, reducing erosion and flooding. The cylindrical structure's unique design leverages turbulence to efficiently break waves, making it a potential solution for coastal protection in various water conditions.
Researchers from Project Seahorse analyzed 7,794 validated iSeahorse observations from 96 countries, revealing new information on sex ratio and pregnancy seasonality. The study found that many seahorse species have larger geographic ranges, more diverse habitats, and shallower depth ranges than previously known.
A new study published in Nature Sustainability suggests that decommissioned offshore structures may only provide limited long-term ecological benefits. The research analyzed over 530 scientific studies on the effects of marine artificial structures and found no conclusive evidence to support their use as artificial reefs.
A recent study by the University of Cambridge found that farmed salmon production leads to a loss of essential nutrients. Consuming one-third of current food-grade wild feed fish directly could maximize nutrients from the sea. This approach could help address global nutrient deficiencies and improve both diets and ocean sustainability.
A new study shows that restored salmon habitat should resemble financial portfolios, offering fish diverse options for feeding and survival. This diversity helps the fish weather various conditions as the climate changes.
Research reveals that rapid-range shift in fish populations is often a sign of impending decline. The study analyzed data from over 2,500 species and found that those shifting at high velocities show marked declines, while core range populations remain relatively stable.
A new study identifies ten key components to promote sustainable, equitable, and climate-smart ocean planning initiatives worldwide. The proposed components include foundational principles and operational pathways that aim to support marine managers and planners in developing climate-smart ocean plans.
A perfect storm of calm weather and limited tidal movement trapped coral eggs in Bills Bay, leading to a massive die-off. However, research by Curtin University shows that some corals were able to survive and that the area has a history of recovering from similar events.
Researchers at OIST found that anemonefish can identify specific lineages of giant sea anemones, revealing two cryptic species within the bubble-tip sea anemone. The study provides new insights into marine biodiversity and highlights the remarkable abilities of these fish in distinguishing between different sea anemone groups.
Researchers found that restored coral reefs can grow at the same speed as healthy reefs within four years, bringing back important ecosystem functions and habitat for marine life. The study's results show promise for reef restoration projects worldwide, but longer-term studies are needed to understand resilience under stress.
A new study by University of Tokyo researchers found that fish weight in the western North Pacific Ocean decreased in the 2010s due to warmer waters limiting food supplies. Climate change is exacerbating competition for resources among fish species, with implications for fisheries and policymakers.
A new study suggests that fish are shifting their focus from less abundant prey to more abundant prey as waters become warmer, leading to a mismatch between their energetic needs and actual food intake. This flexible foraging behaviour may make communities more vulnerable to climate change, increasing the risk of extinctions.
A new analysis of 14,000 fish surveys in 216 MPAs across 43 countries reveals that no-take MPAs are effective in restoring fish populations but come at a cost to coastal communities. The study suggests multiple-use MPAs, where fishing is regulated, can be a more equitable alternative.
A new study found that striped marlin rapidly change color as they hunt in groups, potentially serving as a reliable signal of an individual's motivation to attack. This discovery suggests that marlins have more complicated communication channels than previously thought.
Researchers found stable tuna mercury concentrations worldwide from 1971 to 2022, except for a slight increase in the northwestern Pacific Ocean. The team suggests upward mixing of 'legacy' mercury as a possible cause, which could take up to 25 years to influence oceanic levels.
Researchers analyzed tissue and fecal samples from 90 stranded marine mammals to study the distribution of toxic elements. The study found that Risso's dolphins and short-finned pilot whales had high concentrations of mercury, cadmium, and lead, while dwarf sperm whales had low levels.
A long-term study in Eilat found that artificial reefs reduce diving pressure on natural reefs, allowing for the preservation of both dive tourism and coral reefs. The reef has attracted many species of fish and invertebrates, making it a successful alternative to natural reefs.
A recent study found that even extremely low levels of pesticide exposure can cause lasting behavioral changes in fish, extending to offspring never exposed firsthand. The impact also raises concerns for all vertebrates, including humans.
The first Neolithic farmers and shepherds in Andalusia settled permanently on the island of San Fernando, Cadiz, 6,200 years ago. They collected and consumed shellfish throughout the year, with a greater exploitation during the colder months of autumn, winter, and early spring.
Researchers found that fishers' operational decisions and social structures play a crucial role in adapting to climate change. Cooperatives can be resilient to short-term shocks, but small-scale cooperatives may become more vulnerable as climate change progresses.
A new study reveals tiny plankton (0.02mm) make up majority of ocean plankton, playing critical role in ecosystem health and oxygen production. The research emphasizes the need to take these tiny organisms seriously and incorporate them into global ocean policy.
A study published in Marine Policy found that spatial restrictions after Brexit led to a doubling of greenhouse gas emissions from Norway's mackerel fishing fleet. The change resulted in a significant increase in fuel usage and carbon footprint, equivalent to half a million CO2 emissions per year.
Anemonefish use stripe patterns to identify members of their own species and defend against intruders. Young common clownfish can recognize fish with two or three white bars as competitors and bully them to keep their territory.
A new study found that floating macroalgal rafts in the Ningaloo Coast World Heritage Area provide habitat for a diverse array of juvenile oceanic fish. The rafts, formed by dislodged algae, attract large numbers of juvenile fish and other animals, serving as a potentially important transitional habitat for pre-settlement coastal fishes.
A study in PLOS ONE suggests that Galápagos penguins may accumulate microplastics at a high rate within their food web, with the excretion rate playing a key role. The research uses modeling to simulate microplastic movement through the Galápagos penguin ecosystem and highlights the potential for biomagnification across trophic levels.
Researchers found rapid microplastic accumulation and contamination across prey organisms, with Galápagos penguins showing the highest level. The study highlights the urgent need to reduce plastic waste and protect vulnerable ecosystems.
Researchers at Oregon State University discovered that marine heat waves trigger earlier reproduction and high mortality in early life stages of Pacific cod. The study found these changes persisted in subsequent years, potentially impacting the future of Gulf of Alaska's Pacific cod population.
A team of researchers tracked the rate at which great hammerhead sharks eat hooked tarpon in Florida Keys, finding a 15.3% depredation rate. The study urges ecological solutions that don't impact either species, as conservation efforts stabilize shark populations and angling becomes more popular.
A new study suggests that a cross-sectoral approach to marine protection can meet conservation targets at lower costs for all stakeholders involved. The approach minimizes the opportunity cost to each stakeholder simultaneously, resulting in more affordable protection of high seas biodiversity.