Articles tagged with Overfishing
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A new study projects that the Great Barrier Reef could lose more than half of its coral cover if ocean temperatures continue to rise. The research suggests that moderate warming would lead to a high probability of coral cover declining to less than 10 percent, threatening reef growth.
The study found significant evidence of 'fishing down the food web' in the English Channel, with top predators like sharks and rays declining drastically. The analysis revealed that fish stocks have been removed from the area completely, leaving fishermen to scrape the bottom of the barrel for shellfish.
A decline in shark populations leads to a decrease in herbivorous fishes, promoting algae growth on coral reefs. This study highlights the critical role sharks play in maintaining reef health and underscores the need for conservation efforts to protect these apex predators.
Researchers at UCSB created an Eventual Threat Index (ETI) that quantifies biological and socioeconomic conditions leading to unsustainable harvest rates. The study predicts overfishing threats for eight Pacific tuna species, including yellowfin tuna, using data from the 1990s to present.
Researchers at the University of Minnesota have developed an early-warning system to predict fishery collapse decades in advance, enabling conservation measures to be taken. The 'Eventual Threat Index' uses minimal data to identify conditions that would eventually cause a species to be overharvested.
A recent study found that traditional fisheries targeting large predators like cod have declined, while shellfish such as prawns and scallops have increased in value. However, this shift is at risk due to disease, species invasions, and climate change, which threaten the long-term sustainability of these ecosystems.
A study of 42 co-managed coral reef fisheries found that partnerships between government, conservation groups, and local fishers were successful in meeting the livelihood needs of local communities and protecting fish stocks. The research identified conditions for co-management success, providing vital guidance for conservation groups,...
A study by the Wildlife Conservation Society finds that co-management is a successful solution to global overfishing, with more than half of surveyed fishermen feeling it improved their livelihoods. The approach has also been shown to protect fish stocks and improve ecosystem health.
A new UBC study analyzing 50 shark species reveals the average fin-to-body mass ratio is 3%, significantly lower than the 5% limit set by EU and other countries. This suggests that current laws may not prevent waste or overfishing, despite efforts to protect sharks.
A recent study reveals that international seafood markets are overfishing Madagascar's waters, leading to a decline in key species groups such as shrimp, shark, and sea cucumber. The impact on local food security is significant, with two-thirds of the population facing hunger.
A new study finds that coral reefs are more vulnerable to weakening due to ocean acidification and global warming, especially in developing countries. Effective local management efforts can help maintain coral resilience while carbon emissions are stabilized.
Four new studies reveal global fisheries' significant economic contribution of $225-$240 billion per year, while also highlighting the devastating impact of overfishing. The research shows that healthier fisheries could have prevented malnourishment in nearly 20 million people in poorer countries.
Researchers find threespot damselfish kill slow-growing head corals due to habitat needs. Restoring staghorn coral populations can alleviate pressure on other corals and help mitigate the damage.
Threespot damselfish are killing head corals and adding stress to Caribbean coral reefs due to habitat competition. Restoring staghorn coral, their preferred home, can alleviate pressure on other corals. The fish were not overfished, but rather limited by available real estate.
A UBC study proposes reducing fishing catch by just five percent to safeguard large areas of British Columbia's coastline. This approach, if implemented, could result in significant conservation gains and help achieve established conservation goals.
Researchers have discovered critical details of shark behavior, including migration routes and gathering sites. The findings suggest that open-ocean sharks are particularly threatened from overfishing, and that some species congregate at established 'stepping stone' sites, which can help inform conservation efforts.
A comprehensive assessment by Conservation International found that 20 grouper species are threatened with extinction, with eight already listed as under extinction threat. The report highlights the need for better fishery management and marine protected areas to prevent further decline.
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.
Inland water overfishing leads to declines in catch per unit effort and size of individuals captured, as well as sequential species declines. This can have severe impacts on human health, particularly in developing countries where fish are a primary protein source.
A team of scientists found that coral populations were healthy until the 1980s when they were killed by disease and high sea temperatures. Addressing global environmental issues like climate change is crucial for saving coral reefs.
A new study reveals that overfishing of sharks triggers a domino effect of changes in abundance, contributing to the degradation of Caribbean reefs. The researchers found that sharks play a crucial role in maintaining the stability of the ecosystem, and their removal can lead to a decline in plant-eating fish populations.
A study using earstones reveals that both totoaba and gulf corvina rely on brackish water in the Colorado River estuary for their early life, which is now threatened by freshwater diversion. The research provides evidence of human impact on these species' decline.
A recent study finds that decades-long declines in marine life populations are linked to centuries-old overfishing practices. Overfishing has caused significant ecological damage, including the loss of underwater kelp forests and seagrass beds, which have cascading effects on entire ecosystems.
A two-year study of human impacts on oceans over time reveals that overfishing was the primary driver of ecosystem collapse in each case examined. Historical overkill of marine life triggered changes in ecosystem structure and function, leading to toxic algal blooms, dead zones, and outbreaks of diseases.
The study highlights the loss of large predatory fish as a key factor in altering marine food webs, leading to changes in ecosystem composition. Historical records suggest that fishing impacts may have begun thousands of years ago, contributing to current ecosystem level changes.