Mungkin judul di atas mesti diganti, perempuan subur lebih riskan selinggkuh, atawa lebih tinggi libidonya - gitu kali.
Karena keputusan selingkuh itu kan macem-macem, masak mo selingkuh kepikiran sexual selection, genetic variability,competitive sperm....keburu capek deh.. - karena slingkuh itu indah - karena hidupku hampa - karena isteri/suamiku mengacuhkan diriku.. - karena torn between two lovers - karena jadikan aku yang kedua - karena kau yang terbaik untukku - karena kaulah segalanya (maksutnya punya segala..:-) DWS:Entah apa penelitian berikut bisa menjelaskan fenomena mutakhir perselingkuhan bukan untuk menciptakan keturunan (ente bisa babak belur kalo selingkuh terus hamil hehehe). salam Mia --- In wanita-muslimah@yahoogroups.com, "Dwi W. Soegardi" <[EMAIL PROTECTED]> wrote: > > 2008/7/4 Dan <[EMAIL PROTECTED]>: > > Bung DWS > > > > This is the beauty of nature's design. > > It is all about the survival of the fittest. > > hola Bang Dan, > como estas? > viva espana ni ye hehehehe > > tadinya saya ngga begitu 'ngeh' dengan komentar Anda, > rupanya itulah yang bahan penelitian para pakar biologi > terutama "behavioral biology." > > Sudah lama para peneliti mencari jawaban atas > mengapa pria dan wanita berselingkuh. > Konon, soal pria lebih mudah jawabannya, > sedangkan soal wanita memang terkait erat dengan kesuburan (fertility). > > Menurut salah satu hasil penelitian majalah New Scientist, perselingkuhan pria: > === > Male infidelity has always been easy to explain. Fertilising a female > takes relatively little time and energy, so a male can father a lot of > children quickly and easily. The more females a male mates with, the > more descendants he will have. His genes - including any that promote > such 'promiscuity' - will become widespread. > === > > Sedangkan, perselingkuhan wanita: > === > ....... females mate with several males because this allows them to > pit the sperm of different males against each other in their > reproductive tracts. In this way, they ensure that they are fertilised > by the best-quality sperm. > (Mark Bellis and Robin Baker of the University of Manchester) > === > > Terima kasih, bang Dan, tampaknya memang saya > harus banyak belajar kepada pakarnya, terutama pakar selingkuh hehehehe. > > silakan menyimak salah satu penjelasan biologi tingkah-laku berikut ini. > Dengan google (misal keyword "fertile, infidelity") bisa pula didapati > banyak artikel lain. > > Entah apa penelitian berikut bisa menjelaskan fenomena mutakhir > perselingkuhan bukan untuk menciptakan keturunan (ente bisa babak > belur kalo selingkuh terus hamil hehehe). > > http://www.newscientist.com/article/mg12917523.000-science-female- infidelity--may-the-best-sperm-win-.html > > Science: Female infidelity - may the best sperm win > > * 19 January 1991 > * From New Scientist Print Edition. Subscribe and get 4 free issues. > * GEORGIA MASON > > > Why are so many females unfaithful to their partners? Two-timing would > not seem to have the advantages for them that it has males. A pair of > British zoologists think they know why it has evolved. > > Mark Bellis and Robin Baker of the University of Manchester say > females mate with several males because this allows them to pit the > sperm of different males against each other in their reproductive > tracts. In this way, they ensure that they are fertilised by the > best-quality sperm. > > Male infidelity has always been easy to explain. Fertilising a female > takes relatively little time and energy, so a male can father a lot of > children quickly and easily. The more females a male mates with, the > more descendants he will have. His genes - including any that promote > such 'promiscuity' - will become widespread. > > Females, on the other hand, must devote a lot of time and energy to > each of their young, from producing the original egg, through > nurturing the fetus, to looking after the offspring until it becomes > independent. This means that the number of young a female can produce > is limited. She does not need to mate very often in order to reproduce > at her maximum possible rate. > > More important to a female than the number of times she copulates is > the quality of the males. She will increase the number of her > descendants if she chooses a male who can increase the success of her > offspring - by helping to rear them, or by passing on to them genes > that make them big, strong or attractive. Females are, therefore, > choosy when it comes to selecting a mate. > > But if quality rather than quantity of partners is important to a > female, why does she not seek out the best male she can, and stick > with him? Some biologists have claimed that a female is unfaithful so > that she can persuade a second male to help rear her offspring. Others > have claimed that if a female bears children by a range of fathers, > she increases their genetic variability, maximising the chance that at > least some will succeed. > > However, Bellis and Baker have another idea for the evolution of > female infidelity, in the human species at least. In a world in which > no individual is strictly monogamous, they say, there is one > particular characteristic that is very advantageous to pass on to > one's sons: good-quality sperm capable of beating any opposition. > > But sperm quality if not something a female is likely to be able to > assess from the physical or behavioural attributes of a potential > mate. there is only one way to test the competitive ability of a > male's sperm, say Bellis and Baker. She must mate with other males so > that the sperm of more than one has a chance of fertilising her egg. > > This does not, of course, imply conscious scheming on the part of the > female, say the biologists. Any female who mates with several males > will automatically be fertilised by the most able sperm. If this trait > is heritable, then she will have more successful sons than other > femals, and the behaviour will spread throughout the species. > > To test their theory, Bellis and Baker compiled a questionnaire to > quiz women on their infidelity and had it published in the magazine > Company. the researchers received replies from more than 3,000 women. > Out of these, 162 had last copulated with someone other than their > regular partner. > > If the reason a female mates outside the normal pair bond is to gain > extra help with the young, it is important that the second male > believes that he has a genetic stake in the offspring. But, say Bellis > and Baker, whether or not he fertilises her is not important to the > female. This means that she would copulate with other males even > during infertile stages of her menstrual cycle. > > When they studied the results of their questionnaire, Bellis and Baker > found that this was not the case. They found that women were most > unfaithful during their most fertile period, just before ovulation. > > According to the biologists, this suggests that the evolutionary > advantage of this behaviour depends on the female conceiving offspring > by the second male. If could be that the 'genetic variability' idea is > the correct one, or that he looks as though he has particularly 'good > genes'. > > Bellis and Baker looked at the copulations that occurred within five > days of the last mating with a regular partner. Significantly, this > type of copulation was also more closely associated with peak > fertility than any other. > > Human sperm can last for at least five days in the female reproductive > tract. So if the female is to be fertilised by the most able sperm, > she can only pit them against each other if she mates with her second > male within five days of mating her regular partner. According to the > biologists, females act in a way that encourages competition between > the sperm of different males. > > Bellis and Baker conclude that in the face of natural selection, > infidelity is an advantageous to females as it is to males, and that > females time their sexual behaviour in order to maximise the > competitive abilities inherited by their offspring. It may take two to > tango - but in evolutionary terms it is the females who call the tune > (Animal Behaviour, vol 40, p 997). > > From issue 1752 of New Scientist magazine, 19 January 1991, >
