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Darwinian selection continues to influence human evolution Darwinian selection continues to influence human evolution New evidence proves humans are continuing to evolve and that significant natural and sexual selection is still taking place in our species in the modern world. Despite advancements in medicine and technology, as well as an increased prevalence of monogamy, research reveals humans are continuing to evolve just like other species. Scientists in an international collaboration, which includes the University of Sheffield, analysed church records of about 6,000 Finnish people born between 1760-1849 to determine whether the demographic, cultural and technological changes of the agricultural revolution affected natural and sexual selection in our species. Project leader Virpi Lummaa, of the University´s Department of Animal and Plant Sciences, said: "We have shown advances have not challenged the fact that our species is still evolving, just like all the other species `in the wild´. It is a common misunderstanding that evolution took place a long time ago, and that to understand ourselves we must look back to the hunter-gatherer days of humans." Lummaa added: "We have shown significant selection has been taking place in very recent populations, and likely still occurs, so humans continue to be affected by both natural and sexual selection. Although the specific pressures, the factors making some individuals able to survive better, or have better success at finding partners and produce more kids, have changed across time and differ in different populations." As for most animal species, the authors found that men and women are not equal concerning Darwinian selection. Principal investigator Alexandre Courtiol, of the Wissenschftskolleg zu Berlin, added: "Characteristics increasing the mating success of men are likely to evolve faster than those increasing the mating success of women. This is because mating with more partners was shown to increase reproductive success more in men than in women. Surprisingly, however, selection affected wealthy and poor people in the society to the same extent." The experts needed detailed information on large numbers of study subjects to be able to study selection over the entire life cycle of individuals: survival to adulthood, mate access, mating success, and fertility per mate. Genealogy is very popular in Finland and the country has some of the best available data for such research thanks to detailed church records of births, deaths, marriages and wealth status which were kept for tax purposes. Movement in the country was also very limited until the 20th century. "Studying evolution requires large sample sizes with individual-based data covering the entire lifespan of each born person," said Lummaa. "We need unbiased datasets that report the life events for everyone born. Because natural and sexual selection acts differently on different classes of individuals and across the life cycle, we needed to study selection with respect to these characteristics in order to understand how our species evolves." The project was funded by the European Research Council and the Kone Foundation (Finland) and was carried out with Wissenschftskolleg zu Berlin and the Leibniz Institute for Zoo and Wildlife Research in Germany, University of Turku in Finland, University of Helsinki in Finland, and the Population Research Institute in Finland. » Share this page: Last job offers - Life Sciences - 19.4 Senior Expert - Genetic Biomarker Oncology (PhD) m/f - Physics - 15.5 Postdoctoral Research Associate - Medicine - 14.5 Postdoctoral Research Assistant - Chemistry - 12.5 Research Fellow in Solid State Chemistry NCS016R - Medicine - 12.5 Clinical Research Associate - Hatter Institute Professor in Fashion Technology - Business - 11.5 Researcher - Degradation of Food Waste - Fixed Term (8 Months) - Medicine - 11.5 Research Associate (0.6FTE)
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Foto: Ilustracija DARWINOVA postavka o preživljavanju najjačih još uvijek je prisutna u populaciji modernog doba, otkrivaju nova istraživanja. Ljudi su podložni prirodnoj selekciji kao i bilo koja druga vrsta na svijetu, a običaji poput sklapanja braka nisu je usporili, dapače, brojni su evolucijski procesi prisutni ne bi li se povećao uspjeh kod potencijalnih partnera, poput dobrog izgleda ili visoke inteligencije. Veći uspjeh u udvaranju kod muškaraca, odnosno, veći broj partnerica, povećava uspjeh pri reprodukciji, što kod žena nije tako, javlja Daily Mail. Pogrešna je pretpostavka da je evolucija kod ljudi zastala u trenutku kad su se počeli baviti ratarstvom i prigrlili monogamiju, a dokazi prikupljeni iz crkvene baze podataka, u kojoj je gotovo 6000 Finaca rođenih između 1760. i 1849. godine, pokazuju da tome nije tako. Istraživači su pažnju obraćali na ekonomski i bračni status, rođenja i smrti, kako bi istražili četiri faktora prirodne selekcije: preživljavanje odraslih, dostupnost partnera, uspjeh kod partnera i plodnost. Na ljude i dalje utječu i prirodna i seksualna selekcija Virpi Lummaa, sa Sveučilišta u Sheffieldu objasnila je: "Vidljivo je da razni napreci u okolišu nisu zaustavili evoluciju naše vrste, kao ni ostalih vrsta "u divljini"". Pogrešno je misliti da se evolucija dogodila prije mnogo godina i da, ako želimo shvatiti ljudske procese razvoja, moramo istraživati razdoblje sakupljača i lovaca: "Na ljude i dalje utječu i prirodna i seksualna selekcija. Iako su se uvjeti promijenili, neki faktori još uvijek utječu na to da su određeni ljudi sposobniji za preživljavanje, imaju bolji uspjeh u pronalasku partnera i više potomaka", ispričala je Lummaa o istraživanju objavljenom u časopisu Proceedings. Ukoliko muškarac ima više partnerica povećava se i mogućnost reprodukcije Kolega dr. Alexandre Courtiol dodao je: "Karakteristike koje povećavaju uspješnost pronalaska partnera kod muškaraca vjerojatno će se puno brže razviti no one kod žena i to je stoga što su istraživanja pokazala da veći broj partnerica povećava i uspjeh pri reprodukciji. Iznenađujuće, evolucija u jednakoj mjeri zahvaća i bogate i siromašne".