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78 notícias encontradas para "fish"
Study shows the good state of Garraf's fishery resources
Study shows the good state of Garraf's fishery resources
A scientific project launched by the Universitat Autònoma de Barcelona (UAB) in direct collaboration with fishermen in the region has evaluated the state of fishery resources and ecological quality in the Garraf and Plana de Foix Marine Area. The species were found to be in good
Environmental DNA reveals impact of climate and humans on global river fish biodiversity
A global analysis of fish biodiversity using environmental DNA (eDNA) reveals how human activity and climate influence biodiversity patterns in river ecosystems. An international research team led by the University of Zurich, Eawag and Yunnan University has found that in warmer c
Drifting tuna gear creates risks for wildlife in protected marine areas
An international study co-authored by a University of Hawaiʻi at Mānoa researcher has found that drifting devices used by the global tuna fishing industry are entering marine protected areas around the world, creating potential risks for wildlife and sensitive ocean habitats.
Fossil fish tooth chemistry uncovers Southern Hemisphere role in Earth's ice age shift
To understand where Earth might be headed, it's important to know where it has been. Throughout its existence, especially over the past couple of million years, Earth has experienced periodic cold and warm intervals, known as glacial and interglacial periods.
Wastewater management reverses widespread freshwater deoxygenation in China
Freshwater ecosystems worldwide have been suffering from declining oxygen levels—a trend known as deoxygenation—that threatens biodiversity, fisheries and ecosystem stability. However, a new study published in Nature Geoscience offers hope: targeted nutrient management via wastew
Lamprey brain atlas reveals 450-million-year blueprint of vertebrate brains
What did the very first complex vertebrate brain look like? To find out, scientists turned to an unlikely time traveler: the lamprey, a jawless, eel-like fish whose body plan has barely changed in roughly 360 million years.
This tiny organism contracts 200 times faster than we can blink—here's how
This tiny organism contracts 200 times faster than we can blink—here's how
A tiny, aquatic, single-celled organism can contract to one-quarter of its body length in less than 5 milliseconds—hundreds of times faster than a human can blink. Researchers have discovered that the organism, Spirostomum ambiguum, uses a calcium-activated protein network in a f
Decline in plankton across Northeast Atlantic sends stark warning for ocean health
Microscopic plankton are among the most important organisms on Earth. Phytoplankton produce around half of the oxygen we breathe, while plankton as a whole underpin marine food webs, support fisheries, help regulate carbon and sustain life across the ocean.
Q&A: What happens when warming streams push young salmon beyond their limits
Q&A: What happens when warming streams push young salmon beyond their limits
As climate change warms rivers across British Columbia, young salmon are facing increasing heat stress at vulnerable stages of their lives. Two studies from UBC's Pacific Salmon Ecology and Conservation Lab have found that younger fish cope with heat differently than older fish a
Tiny ancient fish fossil with preserved brain offers clues to early fish evolution
Tiny ancient fish fossil with preserved brain offers clues to early fish evolution
Over 300 million years ago, a minnow-sized fish died and fell to the bottom of a prehistoric swamp near the village of Trawden, Lancashire, in northwest England. The remains of this tiny fish—known as Trawdenia planti—became fossilized, embedding proof of its existence in a layer
Scientists fear seabird die-off as El Niño looms: ‘We don’t know how bad this will get’
Scientists fear seabird die-off as El Niño looms: ‘We don’t know how bad this will get’
Many seabirds are starving to death as a marine heat wave lingers off California and fish seek deeper, cooler watersWithin minutes of walking on a San Diego beach, marine ornithologist Tammy Russell found the feathered carcasses – one after another.Some were mixed in with washed
Fish in a polluted Mexican river may mate with the wrong species, leading to hybrid offspr
The byproducts of modern society appear to be messing with the love life of two tiny fish species that have long coexisted in Mexican rivers.