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Tag: "mate" at biology news

Bigger horns equal better genes

...earchers believe the horns help males successfully mate because they display genetic quality to females and also help to "win" physical battles and achieve high social rank among their competitors. "We've learned from other species, such as deer and sheep, that horn or antler size can be a good indica...

Study shows lizard moms dress their children for success

...males sneak into the territories of other males to mate with females; and blue-throated males form partner...d the amount of estradiol to their eggs when their mate had a yellow throat. The hormone induced a barred back pattern in yellow-throated offspring. The bar...

Study investigates 'divorce' among Galapagos seabirds

...ks a little ragged from taking care of junior, his mate is likely to choose another. A male’s capacity to...t can vary with time, may carry more weight with a mate than stellar genes or past breeding success, Maness said. She used 14 years of data on about 950 ...

CU study reveals why starling females cheat

...their mates for a variety of reasons. Some females mate with subordinate males from within their social gr... to show that individuals from the same population mate with extra-pair males and gain both direct (like additional helpers) and indirect benefits (like bet...

Electric fish conduct electric duets in aquatic courtship

...p allows for further exploration of such topics as mate choice and neural basis of pattern generation in these fish," explained Hopkins, noting that the next step in the research will be to decode the fish transmissions and unravel their meaning....

Philandering female felines forgo fidelity

...cheetahs are highly promiscuous with no detectable mate fidelity between breeding seasons,” said Dr. Sarah Durant, a researcher with the Wildlife Conservation Society/Tanzania Cheetah Conservation Program and project leader. “In fact, we now know many of the fathers exist outside the park and study area. ...

Male owls pitch their hoots to advertise body weight to competitors

...ssessment, both during male competition and during mate choice," says Loïc Hardouin who recently completed a PhD on acoustic communication and territoriality in owls. "The next step is to see whether females use these quality cues when they choose their mating partner." "The vocal communication of owls ha...

Male-killing bacteria makes female butterflies more promiscuous

...ccessfully. This is partly because the decision to mate is mainly under female control and because males have a high mating capacity." This study was carried out on Hypolimnas bolina butterflies in Pacific Island and South-East Asian populations. The islands provide an ideal location because every isla...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...sulting in a sub-optimal birth weight. Saiga males mate with many females and face strong male-male competition during short mating seasons. This means that size matters for males - being smaller than average is one of the major limiting factors for reproductive success. Aline Kühl from Imperial Coll...

Female chimps keep the bullies at bay

...ees may have found a fool-proof way to ensure they mate with only the highest ranking males, namely those ...ith desirable social and physical attributes, will mate with the fertile females. These sought-after characteristics could be inherited by their offspring....

Female Antarctic seals give cold shoulder to local males

...are genetically diverse and unrelated, rather than mate with local dominant males. These findings, publis...le fur seals will travel up to 35 metres to find a mate with high genetic diversity and to avoid inbreeding (while the males will remain static waiting to b...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

... study suggests that, in fish, choosing a flashier mate may cause future generations to be more susceptibl...efits of increased body size to roe production and mate selection may, at least in some cases, counter the immunosuppressive effects of elevated testosteron...

Cancer researchers add spice to research against rare neuromuscular disease

...ddition, the mice treated with ASC-J9 were able to mate and produce offspring, while their counterparts could not. ASC-J9 appears to work by breaking up a sort of molecular clog in neurons affected by Kennedy disease. The biology of the disease is bit like Huntington's disease, a more common neurodege...

Microfluidic chip helps solve cellular mating puzzle

...ortant to understand this process." Yeast cells mate by sending out pheromone designed to catch the att...elped the yeast cells do a better job of finding a mate through two distinct functions. First, it helped cells diversify their responses at low pheromone co...

New study is first to link romantic relationships to genes

New research suggests that choosing a mate may be partially determined by your genes. A study published in Psychological Science has found a link between a set of genes involved with immune function and partner selection in humans. Vertebrate species and humans are inclined to prefer mates w...

Vanishing beetle horns have surprise function

...r biologists. Digging seemed plausible; combat and mate selection, more likely. Even Charles Darwin once weighed in on the matter, suggesting -- one imagines with some frustration -- the horns were merely ornamental. In this month's American Naturalist (Dec. 2006) and the Nov. 2006 issue of Evolution, I...

New clues to how sex evolves

...production -- unlike organisms that need to find a mate before they can reproduce, and mature more slowly....prevents pairing during meiosis, so even those who mate can't produce fertile offspring." The question remains whether new binding sites or new forms of...

Cities change the songs of birds

...the comparison showed that for songs important for mate attractions and territory defense, the urban songs were shorter and sung faster than the forest songs. The urban songs also showed an upshift in frequency that is consistent with the need to compete with low-frequency environmental noise, such as tra...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...cies and on number three in the other, so when you mate the two, every now and then you'll get a male with...begin creating individuals that can't successfully mate with the general population. If other speciation pressures, like geographic isolation, are added to ...

Some butterflies travel farther, reproduce faster

...emerging from the pupa) which could enable them to mate and lay eggs sooner. Females from older population... that individuals that established new populations mate sooner, lay more eggs and have a different form of an enzyme important to flying, phosphoglucose iso...

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