8,313 results
8,313 results for: Fish
- Earth
They’re not briquettes, but they’ll do
Chunks of fossil charcoal found in ancient sediments in north central Pennsylvania suggest that cycles of wildfire plagued Earth more than 360 million years ago.
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Soy estrogen laces paper-mill wastes
Paper-mill effluent contains an estrogen-mimicking pollutant at concentrations that may adversely affect reproduction in fish.
- Earth
Salmon hatcheries can deplete wild stocks
Hatchery fish appear to be replacing wild salmon populations in the Columbia River.
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Endangered condors lay first eggs in wild
A U.S. Fish and Wildlife Service biologist has spied a trio of California condors, released to the wild from captive-breeding programs sometime over the past 6 years, attending a pair of eggs.
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Catfish can track fish wakes in the dark
Infrared photography has revealed that catfish can stalk their prey by following wakes underwater.
- Earth
Memory problems linked to PCBs in fish
Adult exposures to polychlorinated biphenyls, from eating tainted fish, correlate with lower scores on learning and memorization tasks.
- Anthropology
Human fossils tell a fish tale
Fossil clues indicate that Stone Age humans ate a considerable amount of seafood, giving them a broader and more resilient diet than that of Neandertals.
- Earth
Uncertainty returns over sex-change fish
Scientists question whether a potentially gender-bending hormone found in polluted Florida streams is responsible for masculinized female fish.
- Health & Medicine
Arctic Sneeze: Greenlanders’ allergies are increasing
Allergies in Greenland nearly doubled from 1987 to 1998.
- Animals
Many fish run on empty
Many fish eat all the time, while some others spend their days going from brief feast to lengthy famine.
- Humans
Small Steps: World Summit delegates wrangle over eco-friendly future
Twenty thousand delegates from around the world met in Johannesburg last week for a contentious World Summit on Sustainable Development.
- Animals
Eat the Kids: Are cannibal fish just freshening the O2?
In beaugregory damselfish, males that snack on some of the eggs supposedly in their care may end up benefiting the rest of the egg clutch by making more oxygen available.
