Tag: "zebra" at biology news

First real-time view of developing neurons reveals surprises, say Stanford researchers

... in the brain of a small see-through fish called a zebra fish. Stephen Smith, PhD, professor of molecular a...w neurons mature into their adult role goes beyond zebra fish and their ability to see their eventual planktonic prey. "Probably these same processes are hap...

Bird Brains Show How Trial and Error May Contribute to Learning

The adult male zebra finch knows only one scratchy tune learned in its youth, which it performs repeatedly and intensely when females are listening. But occasionally, the finch might improvise, experimenting with a slower, more sultry variation or emphasizing different n...

Birds brains reveal source of songs

... output to the motor system." Normally, the young zebra finch nursery resounds with ever-new, imperfect variations of the adult songs. Gradually, the youngsters' songs become less variable and more true to the old standards. Some years ago, Bottjer had observed that disabling a young finch's AFP circuit s...

Reservoirs may accelerate the spread of invasive aquatic species, researchers say

...ffinis. Some evidence indicates that the spread of zebra mussels, an economically important invasive species, may also have made use of reservoirs to spread. Havel, Lee, and Vander Zanden argue for research aimed at comparing rates of invasion in freshwater lakes and reservoirs that are in similar geograph...

Aggressive aquatic species invading Great Lakes

Foreign species, such as zebra mussels and carp, are invading the Great Lakes and changing the ecology of this vital ecosystem. A study from McMaster University published in the March issue of the Journal of Great Lakes Research suggests that for the round goby, a recently introdu...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

...n the high vocal center region of the brains of 19 zebra finches, a kind of songbird native to Australia th...d, by comparing them with 800 known genes from the zebra finch. They expected to find a few overactive genes in the replaceable neurons. But instead, one ge...

Migratory songbirds have a specialized night-vision brain area

...pean robins -- with two non-migratory songbirds -- zebra finches and canaries. Using a transparent cylindrical cage in Mouritsen's laboratory, they first accustomed the birds to the illumination equivalent of moonlight. They waited until the birds were sitting quietly to eliminate brain activity from move...

Mother birds increase progesterone to hatch females

...a few species, such as the Seychelles warbler, the zebra finch and tree swallow, adaptively manipulate the sex of their offspring before an egg is laid," says Stephanie Correa, a doctoral student in neurobiology and behavior at Cornell and the lead author of the study that was posted online recently in The...

Vitamin A's paradoxical role in influencing symmetry during embryonic development revealed

...ans are arranged asymmetrically. In research with zebra fish, as a model for human biology, Juan-Carlos Be...generate the three-dimensional body pattern of the zebra fish as well as the human body. Patterning of the body occurs along three main axes: the head to toe...

NHGRI Selects 13 More Organisms for Genome Sequencing

...earchers will also construct a physical map of the zebra finch (Taeniopygia guttata) genome, paving the way...hat may be applicable to parasites of humans. The zebra finch was chosen because it is a major model system for understanding brain development, learning an...

Possible treatment found for 'chemobrain'

...earchers will also construct a physical map of the zebra finch (Taeniopygia guttata) genome, paving the way...hat may be applicable to parasites of humans. The zebra finch was chosen because it is a major model system for understanding brain development, learning an...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

...x hormones and sexual differentiation in embryonic zebra fish. As a result, 75 percent of the fish develope...le characteristics. In contrast, 61 percent of the zebra fish spawn raised under normal oxygen conditions ?more than 5 parts per million ?developed into male...

Bringing the zoos to the zebras

...o empower Kenyan communities in endangered Grevy's zebra conservation The Grevy's zebra is the most endangered member of the horse family in the world, with an estimated 2000 left in the w...

Zebra finches remember songs dad sang

...n of speech." Vicario, Phan and Pytte worked with zebra finches, tiny songbirds native to Australia and fa...ted in the paper in Vicario's lab, where he raises zebra finches, Bengalese finches and canaries. The father contributes equally to childcare in zebra finch...

'Biobullets' fight harmful mussels

...sules, which contain toxins that dissolve within a zebra mussel's digestive tract, offer a safe and cost-ef...apsules about the size of the algae particles that zebra mussels feed on. Once ingested, the "biobullets" slowly release small amounts of potassium chloride,...

The shape of life: research sheds light on how cells take shape

... pattern is a series of waves that look a bit like zebra stripes. How, Valles and Tang asked, do they form? Working with graduate students Yifeng Liu and Yongxing Guo, Valles and Tang grew their own microtubules then studied them under three types of microscopes. After two years of work, they solved the ...

Zebra finch males prefer females with exaggerated maternal traits

..., the researchers tested the sexual preferences of zebra finch males that were raised by white parents differing in beak color. For one group of males, the researchers painted the beak color of the mother orange and that of the father red; for another group, the mother got a red beak and the father an oran...

Tarantulas produce silk from their feet

...he team of scientists who made the discovery using zebra tarantulas from Costa Rica. The team found that the tarantulas secrete silk from spigots on their legs, allowing them to better cling to surfaces. Until now, spiders were only known to spin silk from spinnerets located on their abdomen and to use the...

Researchers to study why dead zone returned to Lake Erie

... the relationships among them: excess phosphorous; zebra mussels; and global warming. Of the three cause... consumes oxygen. The second theory is that the zebra mussels may shunt the oxygen-consuming organic matter from the near shore to the bottom waters. In t...

Reversing cancer cells to normal cells

...icroenvironment of human embryonic stem cells, the zebra fish and the chick embryo. Dr. Hendrix’s plenary lecture on April 29 is a highlight of the scientific program of the American Association of Anatomists. Her presentation is titled "the convergence of embryonic and cancer signaling pathways: role...

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