mate 2 3

Tag: "mate" at biology news

Islands in the Genome Promote Speciation

...rms, A. gambiae M and A. gambiae S, that sometimes mate and create hybrid forms in nature. While it's uncl...ggests that individuals either naturally prefer to mate with others of their own form, or that there must be environmental and/or genetic conditions that ar...

Older female fish prefer imperfect male mates, study finds

...ce that visual cues are not the only thing driving mate selection, however. The findings also suggest that "females may not have the same mating preferences throughout their lives," Morris said. Funded by the National Science Foundation and the Research Challenge Program at Ohio University, the paper has ...

Rutgers researchers scientifically link dancing ability to mate quality

...e links dancing ability to established measures of mate quality in humans. Reporting in Thursday's editio...ole in courtship because dance quality tracks with mate quality," said Lee Cronk, associate professor of anthropology. "But this has been hard to study beca...

New study examines how sense of smell affects mating and aggression in mice

...r, a process known as chemoinvestigation, and then mate with her," Shah says. "But the mutants without the MOE even showed a profound defect in initiating chemoinvestigation of the test females." When a wild-type male encounters another male, he will typically sniff the male and then initiate a fight. Ho...

Multiple genes permit closely related fish species to mix and match their color vision

...example, because color plays a significant role in mate choice, differences in color vision could greatly influence and even drive cichlid speciation. In the new work, the researchers performed physiological and molecular genetic analyses of color vision in cichlid fish from Lake Malawi and demonstrated ...

Science's Breakthrough of the Year: Watching evolution in action

...vioral differences such as what to eat and when to mate may be enough to turn a single population into two species. These painstaking observations and other experiments showed that evolutionary studies are as relevant to 2005 as they were to 1859. Science also salutes nine other scientific achievements...

Biotech cotton 8: Bugs 0

... moths that are resistant to Bt are most likely to mate with Bt-susceptible pink bollworm moths that grew up in the refuges. The offspring from such matings die when they eat Bt cotton. In contrast, if all of Arizona's cotton was Bt cotton, only pink bollworm caterpillars that were resistant to the Bt to...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...e Mexico-U.S. border. She said previous studies of mate selection in other animals, such as birds and the ...appears to be strongly linked to the size of their mate and, more importantly, his corresponding abode. “The size of the male’s burrow affects the developm...

Costly breeding programs for endangered species pay off

...scheme, brothers and sisters were never allowed to mate and were instead paired only with offspring from other breeding pairs. In the alternate breeding scheme, the females were allowed to contribute a disproportionate share of offspring to subsequent generations, based on their fitness scores. The relea...

Female butterflies go for sparkle -- not size -- when choosing to mate

...next step is to study the role of eyespots in male mate choice, since females also display them and it is not clear who actually has a chance to observe them, since the female butterfly usually hides them at rest. ...

Picky female frogs drive evolution of new species in less than 8,000 years

...on - essentially a new species - that is unable to mate with either of the original frog populations. This example suggests that rapid speciation is often driven by recontact between long-isolated populations, Moritz said. Random drift between isolated populations can produce small variations over millio...

How fish hear and make sounds at same time

...but male plainfin midshipman fish hum to attract a mate or grunt when stressed. When courting, the midshipman hums continuously for up to two hours to attract a female, who may deposit up to 200 eggs, which the male fertilizes. The next night, the male hums again to attract a new mate. In one season, a su...

Genetically modified maize not found in southern Mexico

... may not be very hardy in Oaxaca, even if they can mate with local plants and gain a degree of hardiness that way. "Indigenous maize grows mainly in the mountains ?the climate and soils can be pretty harsh there," she said. "Also, the influx of transgenic seeds may have declined if farmers became aware o...

DNA from feathers tells tale of eagle fidelity

...nalysis showed that not one adult strayed from its mate - a degree of fidelity highly unusual among birds, the vast majority of which mate with and raise offspring from multiple partners. Not only is this study the first to confirm monoga...

Looks matter to female barn swallows

... Safran removed the eggs so that the females would mate again. Before the females chose their mates for their second nest, Safran captured the males and randomly assigned them to one of three treatments. She either painted their throats, breast and belly feathers with a red marker to enhance their feather...

Insects develop resistance to engineered crops

...s create opportunities for Bt-resistant insects to mate with other insects that do not have resistance. The offspring of such a mating will be susceptible to the toxins. "Having a refuge is a good management strategy, but it is not suitable for small farmers in China and India," said lead author Jian-Zho...

Tufts researchers shine light on firefly mysteries

...eflies lying in order to find romance? "If female mate choice is adaptive, we would expect that the more attractive males would provide females with greater material benefits and/or genetic benefits," said Sara Lewis, associate professor of biology in the School of Arts & Sciences. "On the other hand...

Genetic links could unlock clues to leading cause of blindness

...sus monkeys are not native to the area, they could mate only with each other. This inbreeding has predisposed the monkeys to various genetic diseases, such as age-related macular degeneration. Unlike most other animals, a rhesus monkey's eyes have the same complex structure as a human eye, making them a ...

IMF Launches World’s First DNA Database for Myeloma Patients

...the tail fin and are known to be subject to female mate choice. "Swords resemble gonopodia in overall shape, and thus might effectively represent gonopodium mimics that evolutionarily exploit a pre-existing sensory bias in females," he said. "That is, male ornamentation of the tail fin may have evolved l...

Certain fish have a special mating preference

...the tail fin and are known to be subject to female mate choice. "Swords resemble gonopodia in overall shape, and thus might effectively represent gonopodium mimics that evolutionarily exploit a pre-existing sensory bias in females," he said. "That is, male ornamentation of the tail fin may have evolved l...

1 2 3 4