Tag: "finches" at biology news
ASU research shows connection between testosterone, dietary antioxidants and bird coloration
...n they administered testosterone implants to zebra finches
that it acted as a stimulant to the immune system. They went on to show that carotenoids acquired from food and circulating through the blood were changing in ways that were linked to testosterone levels. Birds who were given additional testosterone ...
Darwin's famous finches and Venter's marine microbes
Although the Galápagos finches
were to play a pivotal role in the inception of Da...ogist John Gould who had to classify the Galápagos finches
before they led Darwin on the right track, Manning and many others have been busy during the last co...
Mother birds give a nutritional leg up to chicks with unattractive fathers
...n in eggs, the researchers found that female house finches
deposit significantly more antioxidants, which pro...in each egg in each clutch she lays." Male house finches
display nutrition-linked plumage ranging in color from bright red to drab yellow. The researchers fo...
Zebra finches remember songs dad sang
...io's lab, where he raises zebra finches, Bengalese finches
and canaries. The father contributes equally to childcare in zebra finch families and does all the singing, Vicario says. "In everyday English, 'song' and 'call' mean the same thing, but in scientific language, they're different," Vicario says. "Cal...
Expert dispels bird flu paranoia
...ird owners and neighbours about their pet parrots, finches
and budgies. "We're getting three or four phone calls a day from people wanting to know if they should sell their house because their neighbours have got birds. Some ways that bird owners can minimise risk are: Build pens to keep domesticated p...
Migratory songbirds have a specialized night-vision brain area
...obins -- 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 movement. Th...
One gene links newborn neurons with those that die in diseases such as Alzheimer's
... In another experiment the scientists allowed male finches
to sing to a female before analyzing the birds' brain neurons. As predicted, the expression of UCHL1 in replaceable neurons, but not in nonreplaceable ones, increased in birds that were singing. "These findings suggest that rising levels of UCHL1 ma...
Birds brains reveal source of songs
...ng them." To test this theory, Fee's team studied finches
that were just old enough to begin their vocal explorations. The researchers temporarily inactivated the part of the AFP connecting to the motor system used in producing songs. That inactivation shut down all the variability, temporarily stranding th...
Bird Brains Show How Trial and Error May Contribute to Learning
... greater and more variable brain activity when the finches
were singing to themselves compared to when they were serenading females. Kao wondered whether she could cause changes in bird song by manipulating this region. Learning takes some time, so Kao expected to wait for her results. But stimulating the L...