Reference Terms
from Wikipedia, the free encyclopedia
Overfishing
Overfishing is a situation where one or more fish stocks are reduced below predefined levels of acceptance by fishing activities. More precise definitions are provided in biology and bioeconomics. Biological overfishing occurs when fishing mortality has reached a level where the stock biomass has negative marginal growth (slowing down biomass growth). Ultimately overfishing may lead to depletion in cases of subsidised fishing, low biological growth rates and critical low biomass levels.
The ability for nature to restore the fisheries is also dependent on whether the ecosystems are still in a state to allow fish numbers to build again. Dramatic changes in species composition may establish other equilibrium energy flows which involve other species compositions than before (ecosystem shift).
Related Stories
1
2
Plants & Animals News
June 9, 2025
June 9, 2025 — For millions of years, large herbivores like mastodons and giant deer shaped the Earth's ecosystems, which astonishingly stayed stable despite extinctions and upheavals. A new study reveals that only twice in 60 million years did environmental ...
June 7, 2025 — A massive global collaboration has tracked over 12,000 marine animals from whales to turtles to create one of the most detailed movement maps of ocean giants ever assembled. The project, MegaMove, ...
June 6, 2025 — Frogs, salamanders, and other amphibians are not just battling habitat loss and pollution they're now also contending with increasingly brutal heat waves and droughts. A sweeping 40-year study shows a direct link between the rise in extreme weather ...
June 3, 2025 — Researchers found telehealth visits can improve care for cats with feline ...
June 2, 2025 — Researchers have synthesized a new compound called infuzide that shows activity against resistant strains of ...
June 3, 2025 — To satisfy the seafood needs of billions of people, offering them access to a more biodiverse array of fish creates opportunities to mix-and-match species to obtain better nutrition from smaller ...
June 3, 2025 — Eating a colorful variety of flavonoid-rich foods like tea, berries, dark chocolate, and apples may significantly lower your risk of chronic diseases and even help you live longer. A major study ...
June 3, 2025 — Researchers asked patients, some of whom had experienced lower back pain for up to 40 years, if being in nature helped them coped better with their lower back pain. They found that people able to ...
June 3, 2025 — Environmental DNA from the air, captured with simple air filters, can track everything from illegal drugs to the wildlife it was originally designed to ...
June 3, 2025 — The biosynthesis of the great variety of natural plant products has not yet been elucidated for many medically interesting substances. In a new study, an international team of researchers was able to ...
June 3, 2025 — As psychedelics gain traction as potential treatments for mental health disorders, an international study stands to improve the rigor and reliability of clinical ...
June 3, 2025 — Researchers have discovered that baboons walk in lines, not for safety or strategy, but simply to stay close to their ...
Latest Headlines
updated 12:56 pm ET
June 6, 2025 — Scientists have uncovered over 200 new giant viruses lurking in ocean waters that not only help shape marine ecosystems but also manipulate photosynthesis in algae. These massive viruses once nearly ...
June 7, 2025 — Humpback whales have been observed blowing bubble rings during friendly interactions with humans a behavior never before documented. This surprising display may be more than play; it could represent ...
June 6, 2025 — Scientists have discovered that a molecule known for defending animal immune systems called itaconate also plays a powerful role in plants. Researchers showed that itaconate not only exists in plant ...
June 3, 2025 — A new study shows how person-to-person variation in antibody immunity plays a key role in shaping which influenza (flu) strains dominate in a ...
June 2, 2025 — Marijuana use among older adults in the US has reached a new high, with 7 percent of adults aged 65 and over who report using it in the past month, according to a recent ...
June 2, 2025 — Scientists have reported use of antibacterial coatings made from resilin-mimetic proteins to fully block bacteria from attaching to a surface. A protein that gives fleas their bounce has been used to ...
June 2, 2025 — Researchers have published the first example of a synthetic sugar detection test for snake venom, offering a new route to rapid diagnosis and better ...
June 2, 2025 — Some microbes living on sand grains use up all the oxygen around them. Their neighbors, left without oxygen, make the best of it: They use nitrate in the surrounding water for denitrification -- a ...
June 2, 2025 — Making a discovery with the potential for innovative applications in pharmaceutical development, a microbiology student has found a long sought-after fungus that produces effects similar to the ...
June 2, 2025 — California Central Valley, which is known for the agriculture that produces much of the nation's fruits, vegetables and nuts, is a major contributor to a growing dust problem that has profound ...