Tag: "mating" at biology news
Female guppies risk their lives to avoid too much male attention
...t impress the females, males will attempt to sneak mating
with them when they aren't looking," says Croft. Male guppies are brightly colored to attract female attention, while female guppies are a dull brown color. The researchers show that female guppies might use this color difference to their advantage,...
Colorful, rare-patterned male guppies have survival advantage in the wild
..., that females might prefer the rare males because mating
with them lowers their own risk to predation....
Electric fish in Africa could be example of evolution in action
...these fish violate an otherwise regular pattern of mating
behavior, and so could be living examples of a species of fish diverging into separate species. The electric fish -- known as mormyrids -- emit weak electric fields from a batterylike organ in their tails to sense their surroundings and communicate ...
Zebra finch males prefer females with exaggerated maternal traits
...ly. The outcome of the study shows that the skewed mating
preferences that are crucial for driving the evolution of sexual dimorphism and exaggerated traits in birds may result directly from sexual imprinting....
Fly's courtship sheds light on the formation of innate behaviors
... of neural circuits that control a specific set of mating
behaviors in the fruit fly, researchers have provided new insight into how instinctual behaviors those that are not based on prior experience arise in the developing nervous system. The work is reported by Jean-Christophe Billeter and other members...
Butterfly speciation event recreated
...ss known as mimicry). Color patterns also serve as mating
cues; these butterflies are extremely choosey abou...re some cases in which new species result from the mating
between two good species. Wait a minute, you may be saying, isn't the definition of a species is tha...
New research reveals unexpected post-mating gene expression in model lab insect
...pulate in a lab, lives only a few weeks and begins mating
soon after hatching. Its entire genetic map or gen...ed genomic background of Drosophila and studies of mating
insects, showed that the sperm and proteins transferred from males to females during mating
Better beetle sought for salt cedar control
...s a beetle. "Almost immediately they will start mating
and will live for about 30days," she said. "We're doing more extensive work on those figures in ourlab at Bushland. We want to determine how many eggs they lay, the lifecycle times and how many batches of eggs they lay in a lifetime." Damage is wh...
Discovery of genetic mutation in Florida beach mice suggests extinct mammoth had light and dark fur
...s the pigmentation of hair color. In laboratory mating
of the different subspecies to produce genetic crosses, the UCSD scientists report in their paper that the variations of this gene account as much as 36 percent of the color variation in Gulf Coast mice. Surprisingly, however, this mutation was absen...
Bird brains shrink from exposure to contaminants
...ions in robins' brains responsible for singing and mating
are shrinking when exposed to high levels of DDT, says new University of Alberta research--the first proof that natural exposure to a contaminant damages the brain of a wild animal. "These residues have been persisting since the late 1960s--that's...
UGA researchers find that hunting can increase the severity of wildlife disease epidemics
...on of hunting and factors such as birth season and mating
season influence disease outbreaks. Their results ...onferred by a virus interact so that the timing of mating
and birth seasons determine whether hunting increases or decreases disease prevalence. They found th...
Transmission rates of vCJD
...n extravagant and rapidly evolving traits, such as mating
signals. Testing this hypothesis requires evaluati...ffect of changes in mate preferences on changes in mating
signals. We conducted the most comprehensive test to date with Enchenopa treehoppers, plant-feeding ...
Contagious cancer in dogs confirmed; origins traced to wolves centuries ago
...ontact between individuals (licking and biting) or mating
between closely related species," she said. "For highly endangered canids, exposure to CTVT could theoretically create an immediate threat to the population's survival." It's also possible that the small population sizes of endangered species like ...
ACS News Service Weekly PressPac -- August 30, 2006
... males. A large baculum is critical for successful mating
in an arctic climate, the researchers note, and even slight decreases may interfere with reproduction. "Furthermore, similar physiological impacts from organohalogen-pollutant exposure may be manifested on the reproductive tract of humans relying on ...
Scent of father checks daughter's maturity
...eromonal cues modulate sexual maturity, to enhance mating
and prevent inbreeding. "Prevention of inbreeding is so crucial to successfully spread healthy genes that anti-inbreeding strategies such as the use of pheromones seem to be conserved across species," he added....
Rodent's bizarre traits deepen mystery of genetics, evolution
...n species. "I have seen absolutely no evidence of mating
between different species," Triant said. "We don't know how they do this, but scent and behavior probably play a role." DeWoody said, "The vole is a great a model system that could be used to study lots of natural phenomena that could impact humans....
Sniffing out relatives, bluegill sunfish use self-referencing to recognize kin
Many animal societies involve highly promiscuous mating
behavior, making it potentially complicated for individuals to recognize and preferentially help their relatives. Researchers have now shown that offspring of promiscuous male bluegill sunfish compare the odor of nest-mates to their own genetically d...
Fire ant-attacking fly spreading rapidly in Texas
...lies, ants have difficulty retrieving food, having mating
flights or rescuing their larvae after mounds become disturbed by animals such as armadillos during the day. "It's not just because these tiny flies are numerous, it's also because they are diverse in kinds, coming after worker ants in many diffe...
Evolutionary first: Parasite reaches beyond host to play havoc with others' sex lives
...erged. But he wasn't expecting what came next. The mating
behavior of females of the uninfected species in o...e the two species overlap, the uninfected females' mating
practices have changed dramatically," says Jaenike. "When we mixed males from the west coast with th...
Childcare tug-of-war influences shorebird breeding systems
...the male or female can be sequentially polygamous, mating
several different times throughout the breeding season and leaving the abandoned partner to raise the chicks. The scientists also found that whilst both males and females are equally adept at raising the offspring, the female parent is more likely ...
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