8,273 results
8,273 results for: Fish
- Earth
Nonstick Taints: Fluorochemicals are in us all
A new federal study strongly suggests that all U.S. residents harbor measurable traces of fluorochemicals, compounds found in a host of consumer products.
- Paleontology
Early tetrapod likely ate on shore
The skull structure of Acanthostega, a semiaquatic creature that lived about 365 million years ago, suggests that the animal fed on shore or in the shallows, not in deep water.
- Ecosystems
Feminized cod on the high seas
Male cod in the open ocean are producing an egg-yolk protein ordinarily made only by females, signaling their potential exposure to estrogen-mimicking pollutants.
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Urban fish show perturbed spawning cycle
Sediment-dwelling fish off Seattle's waterfront exhibit spawning abnormalities that may compromise their ability to reproduce successfully.
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Shades of Flesh Tone: Tests reveal gene for people’s skin color
Researchers have identified a gene that they propose plays a major role in determining a person's skin color.
- Earth
Sharks, dolphins store pollutants
Florida's top aquatic predators are rapidly accumulating high concentrations of brominated flame retardants and other persistent toxic chemicals.
- Earth
No-stick chemicals can mimic estrogen
Some of the perfluorinated compounds used to impart nonstick properties to fabrics and cookware can not only activate a receptor for sex hormones but also inappropriately feminize fish.
- Anthropology
Stone Age Role Revolution: Modern humans may have divided labor to conquer
A new analysis of Stone Age sites indicates that a division of labor first emerged in modern-human groups living in the African tropics around 40,000 years ago, providing our ancestors with a social advantage over Neandertals.
- Earth
Woods to Waters: Wildfires amplify mercury contamination in fish
Forest fires mobilize mercury from the soil and can send the toxic metal into nearby streams and lakes where it accumulates in fish.
- Chemistry
Happy fish?
Researchers have detected antidepressant drugs in the brains of fish captured downstream of sewage-treatment plants.
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Light switch
A photosensitive molecule makes switching off a gene as simple as flicking on a light.
- Earth
Lack of oxygen stunts fish reproduction
Seasonal oxygen shortages in coastal waters, increasing in severity because of pollution, may impair fish reproduction.
