Sentences with phrase «males during mating»

Not exact matches

Geladas live in an open grassland habitat and typically produce loud vocal calls during mating, so the dominant male should be able to easily detect any infidelity and stop it from happening.

This is an illustration of two Pieris rapae, better known as cabbage white, butterflies during a mating dance where the male performs sweeps under the female to show off his bright violet wing colors that only the butterflies can see through their sophisticated visual system.

«What we didn't know and found through our research is that these three structures are distinctly different in protein composition, are separately stored in the male reproductive tract and are transferred sequentially to the female reproductive tract during mating.»

We estimate that a female who mates 2 - 3 times may build 30 - 40 percent of the eggs she lays from proteins the male transfers during copulation.

During the males» initial encounters with male or female visitors, researchers observed little mating or fighting, and the same neurons lit up in response to both sexes.

The disease seemed to spread during mating season, when female devils fight off suitors and males compete for females.

Yet these fervent sexual escapades take their toll: Males» stress hormone levels increase dramatically during the weeks - long mating season, eventually causing their bodies to shut down completely.

The dull color indicates either a female or a non-breeding male, since breeding males turn a jaunty blue during mating season.

During mating, the females reached over to lick the base of the male's penis in 14 of the 20 pairs that copulated.

So, that is, a female who chooses the male with larger, brighter ornaments can be assured that that male grew to look prettier to her because he has fewer parasites and she is unlikely to get these parasites during mating.

Instead, it's the snails» sexuality that creates an advantage: Asexual females, the study found, grew twice as fast during the late juvenile phase and reached reproductive maturity 30 percent faster than female snails that mated with males.

They may not get more mating opportunities during a single breeding season, says Andersson, but they must have more reproductive success over their lifetime than territorial males.

During the mating season, these bright - throated males climb high into the air and then nose - dive, belting out sharp squeaks or trills to impress watching females.

In virtually all higher primates, males have large, sharp canine teeth that they often use to threaten and attack other males during competition for mates, says Lovejoy.

By prolonging the period during which males would need to mate guard females to ascertain paternity, the temporal variability of this signal may curb mate - guarding efforts by male bonobos and thereby enable females to express mate choice without being constrained by males.

This often results in males mate guarding females during brief periods of high fecundity.

«Edible love gifts may influence female behavior, suggests cricket study: Edible gifts given by male crickets to their female partners during mating contain unique proteins which could affect the females» behavior.»

During mating season, the male grows a streamer tail, a feather train that can be up to three feet long.

These spiders are conspicuous during the warmer months when adult males abandon their burrows in search of mates, yet very little was known about these spiders prior to the study.

During mating, the female releases a precursor made of protein, which the male collects using his feet.

Video: The ejaculation - inducing cries of promiscuous female macaques during sex arouse other local males — perhaps to increase her chances of multiple matings

Two experiments were carried out to assess if males with a longer processus were either more likely to mate with a female, or more likely to fertilise a female's eggs during mating.

Processus length was most important when a rival male was present during a mating trial.

A third paper, in press at Journal of Experimental Biology, reports the team's discovery that female market squid show a set of stripes that can be brightly activated and may function during mating to allow the female to mimic the appearance of the male, thereby reducing the number of mating encounters and aggressive contacts from males.

The social context in which mating takes place was also assessed, to see whether the presence of more than one male or female influenced how important processus length is for males both before and during mating.

The researchers suggest that the strategy enables males to attract mates without alerting other males during the courtship ritual.

But these males mate for life, reuniting with the same female year after year during mating season.

During mating season, the male koala makes itself known to potential mates with a deep, extended bellow.

During the breeding season, male wild turkeys gobble, strut, and preen their iridescent feathers, all to attract the attention of eligible mates.

During the autumn the males and females come back together again to mate and then don't emerge again until the next spring.

In the same experiment with the Ruddy Ducks, the males» penises didn't grow any longer than they usually do during mating season, but one of the males maintained his length for twice as long as his rivals did.

They also reasoned that the complicated penis ornaments might help sweep away other males» sperm during mating.

During the mating season, males also develop conspicuous plumage on their necks.

Like about two dozen other manakins, the male uses its wings in a way that biologists don't yet understand to «sing» for its mate — producing clicking, rattling, and humming noises as it prances around during group courtship displays.

The researchers say their video provides a better understanding of the molecular and neuro - muscular pathways that regulate male tail posture during mating.

During breeding season, which takes place over the winter months, groups of male humpback whales will display for potential mates by singing their famously haunting songs, breaching, and performing a host of other competitive displays that depend on speed, strength and size.

They stay closer to human settlements during the most likely time of male infanticide, the mating season.

Led by first author Junsu Kang, the scientists identified anatomical structures that male fish use during mating that produce a signal that impedes regeneration of the pectoral fins after injury.

Male black - and - white snub - nosed monkeys appear to have taken a lesson from Revlon — they go for the rouge - lipped look during the mating season.

For example, transmission occurs during mating, in contrast with earlier systems in which viral stocks need to be applied manually to the vaginal surface; thus, the system preserves features of the male and female reproductive tracts.

The males become more adventurous during the mating season, in summer.

Alpha male status and availability of conceptive females are associated with high glucocorticoid concentrations in high - ranking male rhesus macaques (Macaca mulatta) during the mating season.

It had already been known that Saccopteryx males, beside their mating calls, present a self - made «perfume» to the females during courtship.

Small «sneaky» males reduce the advantage of large size for aggressive «fighter» males during competition for mates

However, since only 6 out of 45,000 spider species worldwide have males injuring conspecific females during courtship or mating, it is a very interesting finding.

«It is quite possible that these injuries were sustained during mating,» explains Jäger, and he adds, «We were unable to find these marks on the males of the «Love Bite Spider»».

Honeybee queens mate with many males during a short period of orgy, followed by a lifetime of celibacy, depending on the use of stored sperm for the rest of her lifetime.

A female may mate with numerous males during her receptive phase.

By mating males of each fluorescent color to a single female, the researchers could visualize how sperm behaved and were displaced inside the female sperm storage organs during sequential copulations.1

Mating rate, mated status of the female, female identity, and female body size can all influence how much sperm some males are willing to relinquish during any particular copulation.