Overfishing is a topic in fisheries science and marine ecology referring to the exploitation of fish stocks at rates exceeding their capacity to replenish through recruitment and growth, thereby reducing biomass below biologically sustainable thresholds. It is quantitatively assessed using reference points such as maximum sustainable yield (MSY), fishing mortality (F), and spawning stock biomass (SSB), with overfishing indicated when F exceeds target or limit reference points or when SSB falls below critical levels. Overfishing alters age and size structure, disrupts trophic interactions, diminishes genetic diversity, and compromises ecosystem resilience, with management responses involving harvest control rules, catch limits, effort restrictions, and spatial or temporal closures.
Fish caught in the same trawl and sold under the same name may in fact have significant genetic differences. Beneath the surface of the Skagerrak lies a biological diversity that is rarely seen in fishmongers. "If management ...
Plants & Animals
Feb 26, 2026
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The decline of California's kelp forests since the marine heat wave of 2013–17 has seen only minor recovery despite heroic efforts at restoration carried out by scientists, fishermen, coastal tribes, volunteer divers and ...
Plants & Animals
Feb 24, 2026
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Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data from nearly 15,000 marine and freshwater fish communities. They found that fish food webs have ...
Plants & Animals
Feb 19, 2026
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According to the ISAF 2025 shark attack report, global unprovoked shark bites returned to near-average levels in 2025, following a sharp reduction the year prior. A total of 65 unprovoked shark bites occurred worldwide in ...
Plants & Animals
Feb 18, 2026
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The Yangtze River Basin, a global biodiversity hotspot, has endured severe ecological degradation over several decades due to intense human activity, leading to a marked decline in aquatic biodiversity. In order to halt this ...
Plants & Animals
Feb 12, 2026
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As ocean temperatures rise due to climate change, corals and other sensitive organisms survive where temperatures are less extreme. But a new study from researchers at Florida Tech, published this month in the journal Communications ...
Environment
Feb 12, 2026
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Human activity has lessened the resilience of modern coral reefs by restricting the food-fueled energy flow that moves through the food chains of these critical ecosystems, reports an international team of researchers in ...
Ecology
Feb 11, 2026
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Fish across Britain's seas face ever-smaller meals as warmer seas and commercial fishing squeeze ocean food webs, new research suggests. Research by the University of Essex and the UK Government's Centre for Environment, ...
Plants & Animals
Feb 3, 2026
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Millions of tires, old washing machines, barges, warships, covering the ocean floor with thousands of square kilometers of concrete—even giant, concrete spheres full of holes: these are all things used to build artificial ...
Ecology
Feb 3, 2026
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11
A new study from the University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science shows that juvenile Atlantic nurse sharks (Ginglymostoma cirratum) grow more rapidly as juveniles and reach smaller maximum ...
Plants & Animals
Jan 28, 2026
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