8,291 results
8,291 results for: Fish
- Archaeology
Seeds of agriculture move back in time
Excavations in Israel indicate that people began to eat large quantities of wild grass seeds and wild cereal grains by around 23,000 years ago, which pushes back by 10,000 years the estimated shift to a plant-rich diet.
- Ecosystems
Fish Stew: Species interplay makes fisheries management tricky in the long run
Annual fluctuations in certain fish populations can be best understood and controlled by accounting for ecological factors, such as predation by other fish, in addition to fisheries harvests.
- Animals
Anybody know this fish?
A 2-month marine-biodiversity survey of the Mid-Atlantic Ridge concluded this week, bringing home much data and some novel specimens.
- Ecosystems
Hurricanes’ full havoc yet to be felt
When Hurricanes Dennis, Floyd, and Irene pummelled North Carolina in the fall of 1999, they delivered a three-punch sequence that may, for years to come, disrupt fishing in the Atlantic Ocean.
- 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.
