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| Pheromones perfumes, attraction colonges | |
| Title | Description |
| What are the Pheromones |
What are the Pheromones A pheromone is a chemical that triggers an innate behavioural response in another member of the same species. There are alarm pheromones, food trail pheromones, sex pheromones, and many others that affect behavior or physiology. Their use among insects has been particularly well documented, although many vertebrates and plants also communicate using pheromones. The term "pheromone" was introduced by Peter Karlson and Martin Lüscher in 1959, based on the Greek pherein (to transport) and hormon (to stimulate). They proposed the term to describe chemical signals from conspecifics which elicit innate behaviours soon after Butenandt characterized the first such chemical, Bombykol (a chemically well-characterized pheromone released by the female silkworm to attract mates) Sex pheromones Sesiidae on a pheromone trap Sesiidae on a pheromone trap In animals, sex pheromones indicate the availability of the female for breeding. Many insect species release sex pheromones to attract a mate and many lepidopterans can detect a potential mate from as far away as 10 km (6.2 miles). Pheromones can be used in gametes to trail the opposite sex's gametes for fertilization. Pheromones are also used in the detection of oestrus in sows. Boar pheromones are sprayed into the sty, and those sows which exhibit sexual arousal are known to be currently available for breeding. Male animals also emit pheromones that convey information about what species they are, and their genotype. The purpose of pheromones giving information about genotype is a mechanism to avoid inbreeding. Females are attracted to males with the least similar genotype, which means they are attracted to males who are the least likely to be related to them. An exception to this is when the female is pregnant. Then they are most drawn to individuals with the most similar pheromones (and therefore genotype) because they want to keep family close by to aid with the raising of their young and to take advantage of protection |
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| A great gift for all of us who like the moon and stars | |||
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| StarMessage: The Moon Phases Screensaver for Microsoft Windows | |||
| ¤ | View the current lunar phase | ||
| ¤ | Get reminder about upcoming full moons | ||
| ¤ | Write your messages with the stars of the night sky | ||
| StarMessage is a gift you should buy to anyone important in your life. | |||
| Opinions about the StarMessage screensaver by other users like you | |
| ¤ | I downloaded the trial and was so pleased with it I HAD to register it. It's great to look at, its a good communication tool. I leave greetings, messages there for other family members. Its amazing and practical, worth every penny and A+ customer support. |
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| ¤ | This is by far the very best screen saver one can find. Lost hard drives etc....I will reinstall each and every time. Have had since 98 and wouldn't change it for one second. Who can ask for more than the 'moon and stars'? |
| Sherry Smothers Sarasota, FL |
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