Tag: "mating" at biology news
Research suggests men's sexual behavior adapts to perceived threats
...als competing for mates before sex occurs, through mating
displays such as bright feathers or butting antler...more evidence that there is also competition after mating
occurs," says author Todd K. Shackelford. "An alternative way of thinking about it is that there is ...
Anthropologist given one of nation's top scientific honors
...hat upright walking was closely tied to monogamous mating
in early hominids. Currently, Lovejoy is one of seven researchers examining a more ancient find, Ardipithecus ramidus, and he recently joined in the discovery and definition of a new species of hominid, Australopithecus garhi, a probable direct lin...
Color vision drove primates to develop red skin and hair, study finds
...nd Molly Morris rules out an initial advantage for mating
and suggests that red-color vision evolved for non-social purposes, possibly foraging. But once developed, trichromaticism drove the evolution of red skin and hair through sexual selection. Fernandez, the study's lead author, first began to questi...
Fire ants are emerging nuisance for Virginians
...ed their range to nearby territories during annual mating
flights and by moving into a new region in search of food or a better nest site. They have also rafted to new locations during floods. Since the 1930s, fire ants have spread to infest large parts of the southern United States, including Puerto Ric...
Philandering female felines forgo fidelity
...b were fathered by more than one male, revealing a mating
system that deviates from those used by other carn...cture that emerges is that of wide-ranging females mating
with a number of males, which could be an advantage in terms of helping to maintain genetic diversit...
Study investigates 'divorce' among Galapagos seabirds
...ovide some meals to the fledgling. So, if, when mating
season rolls around again, a male looks a little r...es are probably never permanently in or out of the mating
game, in contrast to many other animals, she said. A male Nazca booby cast off by a current mate m...
Another sexual attraction is possible ...
...les towards them, even on the darkest nights. Such mating
recognition systems tend to be very specific, henc...e thought to play a major role in the evolution of mating
barriers and in the formation of new species. The fact that conspecific males and females recogniz...
CU study reveals why starling females cheat
...ugh other species of birds appear to adopt similar mating
strategies. "This is the first study to show tha... mates and see that they have different extra-pair mating
strategies," said Rubenstein. "It adds a whole new layer of complexity to the story."...
Electric fish conduct electric duets in aquatic courtship
...ses based on sex. They video recorded four pair of mating
mormyrids (a feat in itself, since the species rarely breeds successfully in captivity) and identified nine common motor displays and 11 specific pulse sequences common to courtship and mating. "Knowing the electrical and motor patterns during cour...
Invertebrate immune systems are anything but simple, conference finds
...uring mating, enhance their immune system prior to mating
in anticipation of pathogen invasion. Similarly, bumblebees maintain their immune systems in an enhanced state following a pathogen attack to counter future infections. This can even cross generations, with mothers transferring immunity to their of...
Sex in the morning or the evening?
...lict ignores the fact that the fitness pay-offs of mating
may change drastically over a short timescale, for...d females should maximize copulation efficiency by mating
in the evening. In research appearing in the July issue of The American Naturalist, researchers at ...
Which came first: Primates' ability to see colorful food or see colorful sex?
...lution of color vision, skin color, fur color, and mating
systems. In addition the authors examined possible...y detected with trichromacy) as well as gregarious mating
systems that would help in the visual comparison of potential mates. Furthermore, the correlated ev...
How fish punish 'queue jumpers'
...reat of punishment to keep would-be jumpers in the mating
queue firmly in line and the social order stable, ...allenge is on as the junior fish tries to jump the mating
queue and the superior one responds by trying to drive it out of the group. Her fascinating disco...
Stressed-out African naked mole-rats may provide clues about human infertility
...ve, rather than indulging in physically exhausting mating
and reproductive behaviour. The workers dig a network of tunnels, often several kilometres long, which they use to find their food of roots and tubers, while the soldiers defend the colony against foreign mole-rats and predators such as snakes. By ...
It don't mean a thing if it ain't got that (modern) swing
...snow in Tioga Pass, Calif., during the 2005 spring mating
season to place a speaker in the center of 20 males' territories and then gauged how close each one approached the recorded trespasser. The 1979 intruder didn't inspire the level of machismo in these males that the 2003 intruder did. Derryberry's ...
Researchers witness natural selection at work in dramatic comeback of male butterflies
... butterfly, become a rare commodity, the number of mating
sessions for both males and females jumps, possibl...inued presence of Wolbachia in the butterflies. By mating
infected females with males from a different island that did not have the suppressor gene, they also...
Foxes get frisky in the far north
...s are starting to reveal complexities in mammalian mating
systems that were not apparent from observational studies of animal social behavior. Using a technique called microsatellite DNA fingerprinting, a team of researchers from the University of Alberta in Edmonton and the University of Quebec at Rimouski...
Species detectives track unseen evolution
...d in the animal kingdom. DNA profiles and distinct mating
groups are the only way to spot an evolutionary splinter group from their look-alike cousins, introducing uncertainty to biodiversity estimates globally. Markus Pfenninger and Klaus Schwenk searched the Zoological Record database (1978-2006) to pin...
Parents seeking sex abandon 1 in 3 offspring
...eminiscent of Hollywood life-styles with plenty of mating
opportunities that may lead to neglect for the family at home. We have shown that over the course of the breeding season desertion enables the parents to produce a greater number of offspring, improving their reproductive success over those more wi...
MGH researchers confirm that bone marrow restores fertility in female mice
... transplanted at eight weeks. Similarly, resuming mating
sooner after transplantation also improved fertili...g-term fertility. The coat-color results of the mating
trial indicated that the transplanted marrows contribution to restoring fertility did not involve ce...
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