fish 2 2

Tag: "fish" at biology news

New species of snapper discovered in Brazil

A popular game fish mistaken by scientists for a dog snapper is actual...angroves. "This discovery that a large, popular fish is a species new to science shows how little we know about the oceans that surround us," Moura said....

Scientists find method to pick noncompetitive animals, improve production

...th a photograph that Muir took of various colorful fish species interacting in a simulated ecosystem at the Monterey, Calif., aquarium. "There is an inherited part of the associations among animals that has profound effects on performance," Muir said. "It's called competition. Animals compete for food,...

University of Alberta researchers unravel intricate animal patterns

...imated blockbuster "Finding Nemo" when a school of fish makes a rapid string of complicated patterns—an ar... the detailed shapes might be a bit outlandish for fish to form, the premise isn’t far off. But how does a school of fish or a flock of birds know how to mo...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...For example, females are larger than males in many fish species, perhaps because of the requisite energetic burdens of producing massive amounts of roe, and elevated testosterone increases body size. Thus, as Mank writes: "The benefits of increased body size to roe production and mate selection may, at ...

Ancient amphibians evolved a bite before migrating to dry land

...ians, which arose 375 million years ago, and their fish ancestors. The shapes of the junctions between adj... bones -- termed "sutures" -- in the tops of these fish and amphibian skulls reveal how these extinct animals captured prey, say authors Molly J. Markey and...

What's in the water? Estrogenic activity documented in fish caught in Pittsburgh's rivers

...'s Center for Environmental Oncology suggests that fish caught in Pittsburgh rivers contain substances tha...the actions of estrogen, the female hormone. Since fish are sentinels of the environment, and can concentrate chemicals from their habitat within their bodi...

Researchers develop technique for bacteria crowd control

...ming bacteria, other examples include bird flocks, fish schools, motor proteins in living cell, and even swarms of communicating nano-robots. "We have presented experimental studies of collective bacterial swimming in thin fluid films where the dynamics are essentially two-dimensional and the concent...

Stopping plants from getting sick

...ping the sooty black smut and the smell of rotting fish from Canada's wheat fields. ...

Long-lived deep-sea fishes imperiled by technology, overfishing

Many commercially prized fish from the depths of the world's oceans are severely...iation of the Advancement of Science. Some of the fish species living at depths greater than 500 meters take decades to reach breeding maturity, so there a...

Mosquito genes explain response to climate change

...nderway to determine the same genes in stickleback fish at the UO and in fruit flies at the University of Pennsylvania. "The response to climate warming in animal populations has penetrated to the level of the gene," Bradshaw said. "It affects development, reproduction and dormancy, and this response i...

Twenty of world's 162 grouper species threatened with extinction

...he basis of the multimillion-dollar live reef food fish trade based in Hong Kong and comprise one of the m...st valuable groups of commercial fishes in chilled fish markets of the tropics and sub-tropics. Around the world, consumers pay up to $50 per kilogram for g...

Biologically inspired sensors can augment sonar, vision system in submarines

To find prey and avoid being preyed upon, fish rely on a row of specialized sensory organs along the sides of their bodies, called the lateral line. Now, a research team led by Chang Liu at the University of Illinois at Urbana-Champaign has built an artificial lateral line that can provide the sa...

Baby fish 'smell their way home'

...s a new light on how the breathtaking diversity of fish on coral reefs has arisen. This has major implicat...ow reefs are managed. "The babies of many coral fish species are swept off their home reef by ocean currents within days of hatching. Ordinarily you'd e...

Study finds mercury prevalent in many western fish

...ations in fish. Though few of the more than 2,700 fish analyzed in the study contained alarmingly high le...e authors of the study. "It was literally in every fish we sampled, which suggests an atmospheric source. There also tended to be a noticeable difference be...

Fish can determine their social rank by observation alone, study finds

A male fish can size up potential rivals, and even rank them f...riment with cichlids (SIK-lids), small territorial fish from Africa. "In their natural habitat, male cichlids are constantly trying to ascend socially by be...

Fish growth changes enhanced by climate change

...th rates in some coastal and long-lived deep-ocean fish species in the south west Pacific are consistent w... “We have drawn correlations between the growth of fish species related to their environmental conditions ?faster growth in waters above a depth of 250 metr...

Newly discovered fish named after New York aquarium biologist

...ved the ultimate honor recently, when a freshwater fish discovered on the African island nation of Madagas...ch of Madagascar's wildlife, all of its freshwater fish species are found nowhere else on earth. The newly described black and gold cichlid is about five i...

How fish conquered the ocean

...us aspects of the physiological adaptations of the fish egg to the marine environment. It is most satisfying that Dr. Finn has been able to tie the threads together in molecular and evolutionary terms with their impressive, comparative sequence alignment study of the involved yolk genes and proteins as pu...

Immunization rates hit record high in poor countries

...me warblers only nest in hemlocks and the mountain fish depend on the trees to keep streams cool. "See all this white growth?" Costa says in his UVM lab, tracing his finger above the soft flat needles. "That's mycelium and likely as not there are spores at the end of each of those." To the untrained ey...

Fungal factories may save hemlock forests

...me warblers only nest in hemlocks and the mountain fish depend on the trees to keep streams cool. "See all this white growth?" Costa says in his UVM lab, tracing his finger above the soft flat needles. "That's mycelium and likely as not there are spores at the end of each of those." To the untrained ey...

1 2 3 4 5 6 7 8 9 10