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courtship in Medical News

Amorous African Fish Exchange Electric Pulses While Mating

...ibe this behavior as being somewhat similar to the courtship duets of songbirds. According to the study...ignal the release of eggs. After extended courtship interactions, the two sexes sometimes engaged in e...or many animals' elaborate decorative features and courtship behaviors. ...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

...posing of waste and that both eggs and sperm come out of. Brennan noted that in many species, females choose a mate after he puts on an elaborate courtship display, and breeding pairs are often monogamous. An exception is ducks -- especially mallards. Although mallards pair off to mate, females are o...

Invasion of Cicada Hordes Feared in US Midwest

... "It's one of the greatest insect emergences on Earth," said Daniel Summers, an entomologist at The Field Museum. A single male's shrill courtship call can reach 90 decibels, equivalent to a kitchen blender. That could sour plans for outdoor events over the next few weeks. Ravinia Festiva...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

...sposing of waste and that both eggs and sperm come out of. Brennan noted that in many species, females choose a mate after he puts on an elaborate courtship display, and breeding pairs are often monogamous. An exception is ducks -- especially mallards. Although mallards pair off to mate, females are of...

Biochemical Chip Solves Cell-mating Puzzle

...didn't know why the amount of two different forms of MAPKs increased during this event. Only one of them, called Fus3, appeared to be in charge of the courtship process. "The role of the second type of MAPK was unclear," said Saurabh Paliwal, lead author of the Nature article. "Through experiments ...

Male Mantids- not Voluntary Victims of Sexual Cannabilism

...ow male mantids respond to variation in the risk of cannibalism. They found that males responded to greater risk by slowing their approach, increasing courtship behavior, and mounting from a greater – and possibly safer – distance. "This shows that male mantids actively assess variation in risk and chang...
courtship in Biological News

Fly's courtship sheds light on the formation of innate behaviors

By studying how genes influence the development and use of neural circuits that control a specific set of mating behaviors in the fruit fly, researchers have provided new insight into how instinctual behaviors ?those that are not based on prior experience ?arise in the developing nervous system. Th...

Past experience of pheromones induces dominant courtship behavior in fruit flies

By investigating the interplay between pheromone signaling and behavior in fruit flies, researchers have begun to understand how an adult fly's earlier experience as a young individual can influence its behavior towards other flies as an adult. In particular, the researchers found that pheromone si...

Electric fish conduct electric duets in aquatic courtship

Cornell researchers have discovered that in the battle of the sexes, African electric fish couples not only use specific electrical signals to court but also engage in a sort of dueling "electric duet." The study is the first to compare electrical and behavioral displays in breeding and nonbreed...

Male seahorses like big mates

...t sizes. Mating preferences were quantified in terms of time spent courting each potential partner. Mattle and Wilson found striking differences in courtship behavior between male and female seahorses, with choosy males and indiscriminate females. Male seahorses were highly active and showed a clear prefere...

Not 1, but 2 kinds of males found in the invasive round goby

... species have found a sneakier way to mate, Marentette explains. Instead of courting females and protecting the young, some males will parasitize the courtship and sometimes the parenting duties of conventional males. They do this by sneaking into the nests of big males or pretending to be females. "Prior ...

Hidden genitalia in female water striders makes males 'sing'

...d, females only expose their genitalia for copulation after males produce a courtship "song" by tapping the water surface. 150 years after the publication of ...he female's back (typical in water striders), males of this species produce courtship signals by tapping the water surface with their middle legs. It is only aft...

Caltech researchers train computers to analyze fruit-fly behavior

...gy (Caltech) have trained computers to automatically analyze aggression and courtship in fruit flies, opening the way for researchers to perform large-scale, hig...ments, the two began training computers to see and recognize aggression and courtship behaviors. The result? An automated system that can monitor a wide variety ...

New species of spiders discovered by UBC scientist in Papua New Guinea

...esolution vision to spot prey. Female jumping spiders also use this heightened visual sense to watch males, who show off their colourful bodies during courtship dances. Maddison collected more than 500 individual spiders during an expedition with Conservation International (CI) last summer in the Kaijende ...

Why you can't hurry love

...tical model of the mating game to help explain why courtship is often protracted. The study, by researchers at ...nomics and Political Science), shows that extended courtship enables a male to signal his suitability to a fema...hematical model considers a male and a female in a courtship encounter of unspecified duration, with the game e...

Spider love: Little guys get lots more

...males were given a one-day head start, reflecting their earlier maturation in nature, they had a ten-times higher paternity rate than larger males. courtship between redbacks lasts an average of 50 minutes when males are competing and 4.5 hours for single, non-competing males. Copulation lasts from 6 to 31 ...
courtship in Biological Technology

Platypus ready to unveil new commercial lines

...tchburg , Wis. - Platypus Technologies recently made its way to San Jose to showcase a new line of products and court strategic partners - and the courtship continues. The life sciences and nanotechnology company is prepared to expand its product lineup beyond its current variety of nano-structured, go...

Green economic plan takes cue from Indiana

...corporation] is what it takes to get the job done, let's do it." Maurer has touted the speed at which the quasi-government agency can move, but the courtship of business comes with a price. As a carrot, Indiana has promised $238 million in tax and training incentives to companies, and it also has passed tax...
courtship in Biological Definition

Parthenogenesis

...e some to act as males when levels of estrogen are low, and others to take the role of female when estrogen levels are high. Lizards that act out the courtship ritual have greater fecundity than those kept in isolation due to the increase in hormones that accompanies the fake sex. So, even though asexual w...
courtship in Biological Dictionary

Gastrula

... Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. Special reproductive cells and structures must be constructed. courtship behavior, hormones, colors, scents ... Gastrula : Early embryo with 3 tissue layers. ... gastrula . Definition from Wiktionary, a free dictio...
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