Articles tagged with Overfishing
Research reveals warm-bodied fish like sharks and tunas burn nearly four times more energy than cold-blooded counterparts, exacerbating the impact of warming oceans. As a result, these species are facing an increasing risk of overheating and habitat loss.
Hundreds of migratory fish species are facing accelerating declines due to dam construction, habitat fragmentation, pollution, overfishing, and climate-driven ecosystem changes. The Global Assessment of Migratory Freshwater Fishes identifies 325 species needing coordinated international conservation efforts.
A new study suggests that releasing pollack closer to their natural catch depths can significantly improve their chances of survival. The research found that releasing fish at these depths can increase survival rates from 56% to over 80%. This could have a positive impact on the long-term sustainability of recreational pollack fisheries.
A UK study found that over 40% of consumers are willing to try new fish species, including sardines and anchovies. The research highlights the potential for improving national health and local economies by embracing home-caught seafood. It also reveals a generational divide in seafood consumption habits.
Researchers find that farmed totoaba could alleviate poaching pressures by establishing a regulated trade. The study suggests that a market-based solution may be more effective than a regulatory approach in curbing poaching. A $6 million subsidy program could make farming cheaper and prevent further decline of the wild population.
A study by Cornell University researchers found that combining smaller fish species offers better nutrition while reducing environmental impact. The optimal diet uses lower quantities of fish with traits like resilience to climate change and overexploitation.
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.
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.
Retention bans are a good first step in addressing shark overfishing, but won't be enough to prevent continued decline. Small sharks and threatened species are most likely to die after being caught, highlighting the need for complementary strategies like area-based fishing restrictions and catch quotas.
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.
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 found a pregnant porbeagle shark was likely killed by a great white shark, highlighting the complexity of shark interactions. The study used satellite tags to track the shark's movements before it stopped transmitting, indicating it had been hunted and eaten.
Researchers found that stock assessments have often been overly optimistic, with a third of sustainably fished stocks classified as overfished. They call for simpler models and greater use of the precautionary principle to protect fish stocks.
A new study reveals that large apex species like tiger sharks and great whites are critical to healthy oceans, but their populations have plummeted by 71% in the past 50 years. Conservation efforts must prioritize protecting these ecological roles to maintain ocean balance.
A study published in Global Change Biology found severe biodiversity decline in the Atacama Trench from 1970 to 1985, coinciding with an El Niño event and extensive fishing efforts. The researchers also discovered a direct impact of sea surface temperature on marine life composition over time.
A new eight-year study found that about 60 species of deepwater sharks and rays are threatened with an elevated risk of extinction due to overfishing. The analysis highlights the need for regulating international trade in shark liver oil and protecting 30% of the world's oceans by 2030.
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.
New research reveals Indian Ocean seabirds face no hotspots where predators feast on prey, highlighting the need for ocean-wide protection. The study's findings suggest that international action is necessary to safeguard these birds' survival due to human activities like overfishing and pollution.
Researchers developed a framework for climate-resilient fisheries, analyzing 18 diverse fisheries across ecological, social and governance dimensions. The framework identifies five archetypes of resilient fisheries with unique pathways to achieve sustainability and benefits to society.
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.
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.
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 recent study by the University of Exeter has confirmed the widespread trading of critically endangered European eels in international markets. The research found that about 40% of North American unagi samples contained European eel, suggesting a significant role for illegal trade in their supply chain.
Research from the University of Cambridge and Cardiff University found that damselfish scare off cleaner fish customers, leading to fewer species receiving vital cleaning treatment. This disruption could contribute to the breakdown of delicate ecosystems supported by coral reefs.
Researchers sequenced the genomes of two endangered sharks, finding low genetic diversity and signs of inbreeding in great hammerheads. In contrast, shortfin makos showed higher genetic diversity and limited inbreeding, offering a glimmer of hope for conservation efforts.
Researchers found that a device called SharkGuard emits small electrical pulses to scare off sharks, reducing bycatch by up to 91% for blue sharks and 71% for stingrays. Further testing is needed to explore the effects on target species like bluefin tuna.
A new study finds that seafood farming's growth rate has already peaked in 1996 and is now declining, requiring rebuilding of wild fish stocks to meet future demand. Without this approach, relying solely on aquaculture could lead to a global seafood shortage by 2030.
Researchers have discovered that reef halos, visible from satellite imagery, can provide insights into coral reef health globally. These bands of bare seafloor surrounding coral patch reefs are more common and dynamic than expected, with the potential to serve as a window into reef health.
A UMass Amherst researcher is developing an eco-friendly drift reduction agent using essential oils derived from food waste to reduce pesticide use, while also creating a potentially scalable process for plant-based seafood that mimics the texture of fish meat.
A new study suggests that global fish stocks will not be able to recover to sustainable levels without strong actions to mitigate climate change and overfishing. Climate change has reduced fish stocks in 103 of 226 marine regions studied, including Canada, from their historical levels.
A new study from North Carolina State University found that positive YouTube videos of sharks can increase human tolerance and support for shark conservation. The study showed a significant increase in attitudes, acceptance, and intentions to help sharks after watching positive videos compared to negative ones.
Researchers found 61 out of 86 species threatened with extinction, with coastal sharks facing greatest conservation concern. Increased protections and international trade regulations are crucial to prevent extinctions among these species.
A report by experts predicts 15 issues that will impact marine and coastal biodiversity in the next decade, including lithium extraction, wildfires, and overfishing. The study aims to raise awareness and encourage investment to protect these ecosystems.
The Amazon River's biodiversity is under strong fishing pressure, indicating a stress that menaces the region's ability to provide protein and other essential nutrients. The research found that large-bodied species are more vulnerable to overexploitation and being replaced by smaller species.
The Save Our Seas Foundation has joined the Shark Conservation Fund to combat overfishing, illegal trade, and habitat destruction threatening shark populations. The partnership aims to conserve shark species, maintain healthy oceans, and address climate change's impact on marine biodiversity.
A recent study published in Frontiers in Marine Science found that 31% of pet food products from Singapore contained shark DNA, highlighting the prevalence of ingredient mislabeling. The researchers suggest implementing global standards for pet food labels to avoid overexploitation of endangered sharks.
Over one quarter of Europe's 20 most highly-fished marine species will face extreme pressure by 2100 if no action is taken to address climate change, overfishing, and mercury pollution. The study projects a significant decline in population size for key species like great Atlantic scallop, red mullet, and common octopus.
According to a new study, climate change will force 45% of transboundary fish stocks to shift significantly by 2100, raising tensions and potential conflicts over resource management. This shift will disproportionately affect tropical countries and potentially collapse international agreements.
A new study projects that farmed seafood supply will drop by 16% globally by 2090 if no action is taken to mitigate climate change. The industry is vulnerable to the effects of climate change, and some regions could see a decline in mariculture production by up to 90%.
A new study reveals that commercial fish stocks, including cod and herring, have been depleted for centuries due to overfishing and environmental changes. The research uses historical sources to show that the Baltic herring population collapsed in the 16th century, with a similar decline observed in cod stocks today.
Researchers used DNA analysis to confirm traditional Tsleil-Waututh Nation fishing practices that promoted sustainable management and conservation. These practices, which selectively harvested male salmon, allowed for larger harvests while maintaining healthy populations and successful spawning.
Two hundred ninety scientific researchers from 46 countries urge the World Trade Organization (WTO) to ban harmful fisheries subsidies that contribute to overcapacity and overfishing. The signatories cite research showing that such subsidies lead to unsustainable fishing practices, contravening UN Sustainable Development Goal 14.
The Khaled bin Sultan Living Oceans Foundation has completed the largest coral reef survey and mapping expedition in history, assessing over 1,000 reefs in 16 countries. The Global Reef Expedition provided a comprehensive dataset for coral reef conservation, highlighting the status and major threats to these ecosystems.
The study analyzed fishery data and interviewed 155 artisanal fishers, identifying 37 species as overfished, including bluefish, dusky grouper, and crevalle jack. Smaller species like beltfish and gray triggerfish are increasingly being targeted.
Climate change poses a pervasive threat to the availability of essential micronutrients from marine fish catches, impacting 40% of countries, including tropical nations. Fisheries micronutrient supplies are less vulnerable to overfishing, but climate change is more critical.
A Rutgers University-led study finds that overfishing is unlikely to be the primary cause of genetic changes in Atlantic cod. Instead, researchers suggest that addressing environmental factors such as climate change and reducing fishing pressure may be more effective in allowing cod populations to recover.
Three of five sawfish species are critically endangered due to easily caught rostra in fishing nets and valuable fins in the shark fin trade. Conservation efforts focus on eight countries where protections can save the species; adequate protections exist in Australia and the US for some remaining populations.
A study of common dolphins in the Hauraki Gulf found declines in carbon values, suggesting a decrease in primary productivity or changes in prey selection. The research highlights the need for careful management of marine parks and surrounding environments to prevent overfishing and nutrient runoff.
A study reveals that 70% of East African reefs have depleted fish stocks, affecting food production and reef ecology. Rebuilding fish biomass is key to long-term sustainability.
Researchers found that existing marine reserves need to be much larger to conserve shark populations, with reserves extending between 10-50km required for significant improvements. This study provides options for managers to address declines in shark populations and ensure healthy oceans.
A study analyzing data from 2005 to 2018 found that targeted seasonal and spatial closures can lead to successful population recovery of Nassau grouper in the Cayman Islands. By the end of 2018, both populations had tripled in size, highlighting the effectiveness of adaptive conservation actions.
A new approach to managing fisheries focuses on whole ecosystems rather than individual populations. The proposed indices use widely available data to determine when ecosystem overfishing is occurring, helping avoid damaging impacts on fishing economies.
A new study suggests that periodic closures of fishing grounds can promote fish stock recovery while still providing enough to eat. The researchers found that well-managed fisheries with pulse harvests achieved better outcomes than those with permanent no-take MPAs.
A Duke University economist argues that federal subsidies for US commercial fisheries should be rejected due to their lack of scientific merit. The proposed rule change could lead to overfishing, weak economic performance, and increased by-catch and habitat impacts if finalized.
Researchers at UCSB and the University of Oregon discovered that efforts to close off fishing in marine reserves paradoxically led to more fishing, exacerbating habitat degradation. The preemptive behavior was equivalent to 1.5 years of avoided fishing following the ban.
Snail attacks reduce Porites cylindrica coral growth by up to 43% in less than a month, threatening the survival of degraded Pacific reefs. The snails selectively prey on the last remaining coral species, exacerbating the downward spiral of reef decline.
New research reveals that dolphins are not only being accidentally caught in fishing nets but may be actively seeking them out for food. The study found that acoustic deterrents were ineffective and may even attracted more dolphins, highlighting the need for effective fish stock management to break the vicious cycle of overfishing.
Research suggests that traditional sailing methods have helped prevent overfishing and ensure the long-term survival of the Fal oyster fishery. Motorising the fleet would result in a nine-fold increase in fishing activity, putting the fishery at risk.
A recent study suggests that an aggressive reef competitor, the Threespot Damselfish, may be impeding the recovery of Caribbean long-spined sea urchin populations after a mysterious disease outbreak. The research reveals a link between the decline of staghorn coral and the increase in damselfish populations.
Researchers found that in cases of constant misreporting, the impact on fishery status is less critical than trend analysis, suggesting more sustainable management possible despite missing catch data. Misreporting can happen frequently worldwide, but many fisheries can still be well-managed with trends in population changes considered.