8,305 results
8,305 results for: Fish
- Genetics
Elephant shark genome small and slow to evolve
The animals have the smallest genome of non-bony fishes and the slowest-evolving genes among vertebrates, a study suggests.
- Earth
When testosterone gets down and dirty
Testosterone excreted by livestock can pass through soils, which may explain new findings of fish-altering hormonal activity in water downstream of cattle feedlots.
- Earth
Farmed salmon bring PCBs to the table
High concentrations of chlorinated organic contaminants in farm-raised Atlantic salmon may warrant limiting consumption of the otherwise-healthful fish to no more than once per month.
- Animals
Fish in the dark still size up mates
Female cave fish still have their ancestral preference for a large male, even though it's too dark to see him.
- Paleontology
Winging South: Finally, a fly fossil from Antarctica
A tiny fossil collected about 500 kilometers from the South Pole indicates that Antarctica was once home to a type of fly that scientists long thought had never inhabited the now-icy, almost insectfree continent.
- Humans
Sea burial for Canada’s cod fisheries
The Canadian government has declared an end to cod fishing in nearly all of the country’s Atlantic waters.
- Earth
Reused paper can be polluted
Toxic chemicals can end up in recycled paper, making release of these reused materials into the environment potentially harmful.
- Earth
What’s happening to German eelpout?
Reproductive anomalies in eel-like fish may represent good markers of exposure to hormones or pollutants that mimic them.
- Paleontology
Earful of data hints at ancient fish migration
Small bony growths that developed in the ears of fish more than 65 million years ago are providing a wealth of information about the species’ environment and lifestyle.
- Health & Medicine
Heart drug derails algal toxin
A drug for treating high cholesterol might someday find use relieving the debilitating symptoms of poisoning from some algal toxins.
- Earth
More fish survive if plankton bloom early
Data collected by Earth-orbiting satellites and oceangoing trawlers suggest that juvenile haddock of Nova Scotia are more abundant in years when plankton populations peak earlier than normal.
- Earth
Spawning Trouble: Synthetic estrogen hampers trout fertility
Exposure to a synthetic estrogen called ethynylestradiol, which is commonly found in birth control pills and enters the waterways through sewage effluent, reduces male trout’s fertility by half.
