Tag: "mating" at biology news

Ready when you are

...ciously using visual cues to increase their likely mating opportunities. For females, this means maximising the quality of potential mates and for males, this means delaying maturity until there is less competition from more attractive males. 'This is the first evidence that a species adjusts its rate of ...

Microfluidic chip helps solve cellular mating puzzle

... has solved a long-standing mystery related to the mating habits of yeast cells. The findings, described ...her when they want to merge, engaging in a type of mating behavior. Human cells talk to one another in a similar way, and its important to understand this pro...

CMU researcher publishes anole lizard findings

... anoles fully extend these dewlaps as signals when mating or establishing territory. Biologists have wondered whether anoles species that live in a very similar habitat, such as a tree top, also developed some of the same dewlap characteristics a theory called ecomorph convergence. Other studies have fou...

Female chimps keep the bullies at bay

...se with fewer females in estrous at the same time, mating competition between males intensifies. As a result, there is an increased probability that high-ranking males, with desirable social and physical attributes, will mate with the fertile females. These sought-after characteristics could be inherited ...

Tracking sperm whales and jumbo squid

... the central Gulf of California where spawning and mating of these animals probably take place." Electronic tags The MEPS study was conducted in fall 2004 near Santa Rosalia, a coastal Baja California town that is the center of Mexicos jumbo squid fishery. During six days at sea, the research team ...

Remote sheep population resists genetic drift

... total amount of possible gene combinations that a mating male and female couple can produce. Scientists believe greater genetic diversity corresponds with greater odds of survival and successful reproduction due to a greater variety of genetic tools an organism has to combat the forces, such as diseases, t...

Male reindeer inflate a large air sac in the neck region to emit their hoarse rutting calls

...of Anatomy. As in other species with harem-like mating systems, the voice organs of reindeer differ accor...aneously, the performance serves to attract female mating partners. Males vocalize almost exclusively during the autumn rutting season whereas females are m...

Mitochondrial genes move to the nucleus -- but it's not for the sex

...production of eggs or pollen, via meiosis. But the mating system determines whether or not this separation is permanent. With self-pollination, the components separated by meiosis are brought back together. In contrast, the components are further separated if they mix and match haphazardly during out-crossi...

Common fungicide causes long-term changes in mating behavior

...ffect the evolution of wildlife through changes in mating behavior. Drs. David Crews and Andrea Gore examined mate preference in male and female rats whose great-grandparents were exposed to the fungicide vinclozolin, which causes early onset of cancer and kidney disease in males. They found that female...

Male owls pitch their hoots to advertise body weight to competitors

...ales use these quality cues when they choose their mating partner." "The vocal communication of owls has interesting similarities to that of terrestrial mammals where the information is typically encoded in acoustic components of the calls rather than in the diversity of the vocal repertoire as it is in son...

Fighting for their attention

...ith new calves than others. Lusseau says: "In a mating system driven by female selection being able to exclude other males from the vicinity of oestrus females means that individuals can be more readily picked as a favourite partner". The old saying seems to hold true for these dolphins: "far from the...

Flies don't buzz about aimlessly!

...ermittent searchers include octopi, graylings, and mating crickets. Andy Reynolds says, "Our results with freely flying Drosophila appear to be the first reported example of searching behaviour that is both scale-free and intermittent. This suggests that these behaviours are not part of two different sea...

UT Metroplex institutions to collaborate on biomedical research

...on understanding how genes influence sexuality and mating preference. "DNA methytransferases in neuronal signaling and resulting behavioral output" Dr. Lisa Monteggia, assistant professor of psychiatry at UT Southwestern, and Dr. Linda Perrotti, senior research scientist in psychology at UTA. This stu...

Gene study shows three distinct groups of chimpanzees

...ally different social systems, cultures, diets and mating systems. On the other hand, in this study, looking at three "subspecies" of common chimpanzees, "we found significant genetic variation," said Przeworski, "but there's very little detectable difference between the populations in terms of appearanc...

Spousal choices can influence the risk of developing alcoholism

...l similarity for influence on AD risk: assortative mating (like marries like), and reciprocal spousal intera... influences his/her spouses behavior). Assortative mating is reflected in an increased frequency of spousal AD; but spousal interaction seems to protect again...

Tracking genes for self-pollination in arabidopsis

... pseudo self-compatibility is a best-of-two-worlds mating strategy, Nasrallah said, because it maintains the benefits of out-crossing while providing reproductive assurance when mates or pollinators are scarce. In the latest research, Pei Liu, a postdoctoral researcher in Nasrallah's laboratory, and colleag...

Female ticks have market on gluttony

...ys, rather than minutes. "In this family of ticks, mating takes place on the host," says Kaufman. "Most other insects mate before or after their brief blood meal the two acts are totally separate, but not with these ticks." Female ticks require six to 10 days to engorge fully. First, she attaches herself...

When smell cells fail they call in stem cell reserves

...k. "The ability to smell is crucial for eating, mating and survival, and it's important that the olfactory system be fully operational all the time," explains Reed. "The HBCs act as a fail-safe to ensure continued function of the sense of smell." The discovery of these two distinct types of stem cells...

'Insulator' helps silence genes in dormant herpes virus

... found in both yeast and chicken, namely the yeast mating loci and chicken globin locus. To see if insulators play a role in silencing viral genes during the latent phase, Zhou and his group studied cells infected with HSV-1. The studies showed that during a latent period, the virus binds to a host protei...

Spouse may 'drive you to drink' but also can protect you from alcohol

...blem drinking. Grant says that although non-random mating means that a person with genetic risks for alcohol problems will tend to marry another with a propensity toward alcohol dependence, it appears that when one spouse begins to abuse alcohol, the other might actually reduce alcohol intake. "We don't r...

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