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Mates in Biological News

Sexy or repulsive? Butterfly wings can be both to mates and predators

New Haven, Conn. Butterflies seem able to both attract mates and ward off predators using different sides of their wings, according to new research by Yale University biologists. Trying to find the balance between these two crucial behaviors is one of nature's oldest dilemmas, according to Je...

Female concave-eared frogs draw mates with ultrasonic calls

Most female frogs dont call; most lack or have only rudimentary vocal cords. A typical female selects a mate from a chorus of males and then silently signals her beau. But the female concave-eared torrent frog, Odorrana tormota, has a more direct method of declaring her interest: She emits a high...

Female katydids prefer mates 'cool' in winter and 'hot' in summer

COLUMBIA, Mo. Katydid (or didnt she?) respond to the mating call of her suitors. According to scientists at the University of Missouri, one species of katydid may owe its ecological success and expanded habitat range to the ability of male katydids to adjust their mating calls to attract females....

Male seahorses like big mates

Male seahorses have a clear agenda when it comes to selecting a mating partner: to increase their reproductive success. By being choosy and preferring large females, they are likely to have more and bigger eggs, as well as bigger offspring, according to Beat Mattle and Tony Wilson from the Zoologi...

Opposites attract -- how genetics influences humans to choose their mates

Vienna, Austria: New light has been thrown on how humans choose their partners, a scientist will tell the annual conference of the European Society of Human Genetics today (Monday May 25). Professor Maria da Graa Bicalho, head of the Immunogenetics and Histocompatibility Laboratory at the Univers...

Remembrance of things past influences how female field crickets select mates

RIVERSIDE, Calif. UC Riverside biologists researching the behavior of field crickets have found for the first time that female crickets remember attractive males based on the latter's song, and use this information when choosing mates. The researchers found that female crickets compare the inf...

Female mammals follow their noses to the right mates

Female birds often choose their mates based on fancy feathers. Female mammals, on the other hand, may be more likely to follow their noses to the right mate. That's one conclusion of Cambridge zoologist Tim Clutton-Brock and Harvard researcher Katherine McAuliffe, whose review of evidence for fema...

Fish cancer gene linked to pigment pattern that attracts mates

ATHENS, Ohio (Aug. 18, 2008) Though skin cancer is deadly to male fish, it also has one perk: The black melanoma splotches arise from attractive natural markings that lure female mates. A new study published in the Proceedings of the National Academy of Sciences this week shows that the melanom...

Bizarre walking bat has ancient heritage

...tree trunks. Among other unusual traits, the bat is thought to use its teeth and claws to excavate roosting burrows and males appear to compete for mates by gathering for singing competitions in their breeding season. ...

Disease threat may change how frogs mate

...ld frog populations that have been infected with this virus may be choosing mates differently to those in healthy populations. As Ranavirus is typically a...diseased frogs to mate with each other. These frogs could also be selecting mates based on their Major Histocompatibility Complex (MHC) type; a group of gene...

Antibiotics take toll on beneficial microbes in gut

...robes after an untreated mouse was placed in the same cage. That wasn't a complete surprise, since mice have a habit of eating the feces of their cage mates and therefore picked up normal gut microbes quickly. Not a lesson applicable to humans? In patients with refractory antibiotic-associated diarrhea...

Why do we choose our mates? Ask Charles Darwin, prof says

... Charles Darwin wrote about it 150 years ago: animals don't pick their mates by pure chance it's a process that is deliberate and involves numerous fac...ied Darwin's work for years, says that Darwin's beliefs about the choice of mates and sexual selection being beyond mere chance have been proven correct, as ...

Biologists devise unifying framework to explain evolutionary puzzles

...heoretical ecologists, Roughgarden is the author of two books that challenge the Darwinian theory of sexual selection, which says that competition for mates and choice for genetic benefits drives the evolution of certain traits. Roughgarden's new "social selection" theory argues, however, that cooperative ...

Biologists consider unifying framework to explain evolutionary puzzles

...heoretical ecologists, Roughgarden is the author of two books that challenge the Darwinian theory of sexual selection, which says that competition for mates and choice for genetic benefits drives the evolution of certain traits. Roughgarden's new "social selection" theory argues, however, that cooperative ...

Genital stimulation opens door for cryptic female choice in tsetse flies

...during and after the mating processleads to rapid evolutionary changes in genital structure and is probably influenced by the number of times a female mates with different males. "The tsetse fly Kama Sutra is long and elaborate," said Eberhard, who described the 30-minute ritual during which the male r...

Is love at first sight real? Geneticists offer tantalizing clues

...character of their consorts," said Mark Johnston, Editor-in-Chief of the journal GENETICS , "but they may not have as much control over our choice of mates as they'd like to think." ...

NC State study finds genes important to sleep

... For many animals, sleep is a risk: foraging for food, mingling with mates and guarding against predators just aren't possible while snoozing. How, then, has this seemingly life-threatening behavior remained constant among...

Why you can't hurry love

...tent and do not give up. The female's strategy is a compromise - a trade-off between on the one hand the greater risk of mating with a bad male if she mates too quickly, and on the other hand the time cost of delay. Under this compromise there remains some risk that she will mate with the wrong type of mal...

Mosquitoes create harmonic love song before mating, study finds

...proximately 400 hertz [vibrations per second] for the female and 600 hertz for the male," said Hoy. The mating duet, generated just before the couple mates on the fly, settles at around 1,200 hertz -- roughly an octave and a half above concert A (the pitch to which instruments are tuned -- the A that has ...

Male crickets with bigger heads are better fighters, study reveals, echoing ancient Chinese text

...tions that the best cricket fighters have the largest heads. In nature, male field crickets fight one another over territories and access to potential mates by using their pointed and pincer-like mouthparts as weapons. In a study published in the Dec. 24 issue of the online, open-access, peer-reviewed jour...

Honey bees on cocaine dance more, changing ideas about the insect brain

...r the idea that bees have a reward system, that it's been co-opted and it's now involved in a social behavior, which motivates them to tell their hive mates about the food that they've found," Robinson said. The findings also indicate that honey bees will make good subjects for substance-abuse research,...

Quiet bison sire more calves than louder rivals

... During bison mating season, the quietest bulls score the most mates and sire the most offspring while studs with the loudest bellows see the least action, according to a surprising new study by researchers at Universit...

Why the 'perfect' body isn't always perfect

...men prefer a WHR associated with lower or higher androgen/estrogen ratios (or value them equally) should depend on the degree to which they want their mates to be strong, tough, economically successful and politically competitive," Cashdan writes. "And from a woman's perspective, men's preferences are ...

Female plant 'communicates' rejection or acceptance of male

...ction. Like humans, the mating game isn't always easy for plants. Plants rely on external factors such as wind and animals to bring them potential mates in the form of pollen grains. When pollen grains arrive, an introduction occurs through a "conversation" between the pollen (the male part of the flow...

Rare corals breed their way out of trouble

... Rare corals may be smarter than we thought. Faced with a dire shortage of mates of their own kind, new research suggests they may be able to cross-breed with certain other coral species to breed themselves out of a one-way trip to...

Key to function of dinosaur crests found in brain structure

...rchers suggest that the crests could have been used to make low, eerie bellowing calls that could have been used in communication, perhaps to call for mates or warn others of predators. The CT scans documented a delicate inner ear that confirms that the dinosaurs could hear the low-frequency calls produ...

Brain structure provides key to unraveling function of bizarre dinosaur crests

...rchers suggest that the crests could have been used to make low, eerie bellowing calls that could have been used in communication, perhaps to call for mates or warn others of predators. The CT scans documented a delicate inner ear that confirms that the dinosaurs could hear the low-frequency calls produced...

Egalitarian revolution in the Pleistocene?

...ing hyenas, meerkats, and dolphins, group members form coalitions and alliances that allow them to increase their dominance status and their access to mates and other resources. Alliances are especially common in great apes, some of whom have very intense social life, where they are constantly engaged in a...

How 'secondary' sex characters can drive the origin of species

...ted to the origin of species is not new. But how they are related has perplexed evolutionary biologists. The individuals of most species do not choose mates according to the size and shape of genitalia. Indeed, genitalia may not be relevant until the latter stages of courtship, if at all. An early "loc...

Smells like bees' spirit

..., University of London. When bumblebees return to the nest from a successful foraging mission, they produce a pheromone which encourages their nest mates to also go out and find food. Scientists had originally thought that these pheromones elicited a standard response from all bees. But new research fro...

Entomologists play matchmakers for cerambycid beetles

...and University of Illinois entomologist Larry Hanks identified and then replicated in the lab the very pheromones chemicals insects emit to attract mates that these beetles produce naturally. Next, they placed these attractant lures or "love potions" in traps as a sensitive and selective way of detecti...

A bee's future as queen or worker may rest with parasitic fly

...to depart and start new nests as egg-laying queens. Bees that emerge from cells, or brood chambers, that also house flies are smaller than their nest mates from fly-free cells. The flies may encourage worker behavior in some bees. "We often think of parasitism in terms of it affecting an animal's fitn...

Ultrasonic frogs can tune their ears to different frequencies

...h frequency and ultrasonic hearing when the low frequency background noise of rushing water is too intense for them to pick out the calls of potential mates or rivals, he said. This research likely has implications for human health. Earlier research into the mechanics of frog hearing helped Feng and his...

Seagulls: Are males the weaker sex?

...on about the presence of more advanced embryos (control group, replicating natural conditions). Post-hatching, the chicks were reared either with nest mates or alone. The researchers found a sex-specific effect of social environment on hatching duration and fledging* condition. When incubated in isola...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

...ale pregnancy on sex roles and sexual selection of mates and are trying to understand how the novel body st...s within a breeding season, and each seahorse only mates with one other seahorse. In this system, if there ...competition among females because there are enough mates for everyone, Jones explained. So seahorses have n...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

...ale pregnancy on sex roles and sexual selection of mates and are trying to understand how the novel body st...s within a breeding season, and each seahorse only mates with one other seahorse. In this system, if there ...competition among females because there are enough mates for everyone, Jones explained. So seahorses have n...

Changes in ocean conditions in Sargasso Sea potential cause for decline in eel fishery

...inct temperature fronts are present in the winter and spring that form a northern boundary of the spawning area, believed to be used by eels to locate mates and favor survival of their young. After hatching, their transparent leaf-like larvae, known as leptocephali, remain in surface waters for up to a ...

Research uncovers the social dynamics of yellow jackets

...Even though only one family lives within a colony, each yellow jacket queen mates with several males, creating a complex family tree. Social insects such ...in the journal Evolution. No correlation was found between the number of mates and the number of worker cells. However, queens that effectively mated four...

Scientific evidence supporting evolution continues to grow

...hin species also can result in the appearance of new species. The formation of a new species generally takes place when one subgroup within a species mates for an extended period largely within that subgroup, often following geographical separation from other members of the species. If such reproductive...

Indigenous water frogs under threat

... significantly more progeny, thereby crowding out the other frog species. The number of progeny is increased still further because when the marsh frog mates with Grafs hybrid frog (Rana grafi) or the edible frog (Rana esculenta), it produces marsh frog progeny. This may sound astounding, but can be attribu...
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