![\"\"](\"http:\/\/farm4.staticflickr.com\/3166\/2634152419_88fa78c2e6_z.jpg?zz=1\")
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Pero no todo va a ser lucha despiadada, la tautolog\u00eda tiene tambi\u00e9n su lado bueno y as\u00ed cuando las condiciones sean favorables, ser\u00e1n m\u00e1s los que sobrevivan:<\/p>\n
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The obvious explanation is that the conditions of life have been highly favourable, and that there has consequently been less destruction of the old and young and that nearly all the young have been enabled to breed. Their geometrical ratio of increase, the result of which never fails to be surprising, simply explains their extraordinarily rapid increase and wide diffusion in their new homes.<\/em><\/p>\n <\/em><\/p>\n La explicaci\u00f3n evidente es que las condiciones de vida han sido sumamente favorables y que, a consecuencia de ello, ha habido menos destrucci\u00f3n de adultos y j\u00f3venes, y que casi todos los j\u00f3venes han podido criar. Su progresi\u00f3n geom\u00e9trica de aumento -cuyo resultado nunca deja de sorprender- explica sencillamente su aumento extraordinariamente r\u00e1pido y la amplia difusi\u00f3n en la nueva patria.<\/em><\/p>\n <\/p>\n En este caso la explicaci\u00f3n es evidente, dice el autor. Evidente, s\u00ed. Empero, \u00a0de ning\u00fan valor para explicar el Origen de las Especies.<\/strong><\/p>\n <\/p>\n 91.<\/p>\n But we have better evidence on this subject than mere theoretical calculations, namely, the numerous recorded cases of the astonishingly rapid increase of various animals in a state of nature, when circumstances have been favourable to them during two or three following seasons. Still more striking is the evidence from our domestic animals of many kinds which have run wild in several parts of the world; if the statements of the rate of increase of slow-breeding cattle and horses in South America, and latterly in Australia, had not been well authenticated, they would have been incredible. So it is with plants; cases could be given of introduced plants which have become common throughout whole islands in a period of less than ten years. Several of the plants, such as the cardoon and a tall thistle, which are now the commonest over the wide plains of La Plata, clothing square leagues of surface almost to the exclusion of every other plant, have been introduced from Europe; and there are plants which now range in India, as I hear from Dr. Falconer, from Cape Comorin to the Himalaya, which have been imported from America since its discovery. In such cases, and endless others could be given, no one supposes that the fertility of the animals or plants has been suddenly and temporarily increased in any sensible degree. The obvious explanation is that the conditions of life have been highly favourable, and that there has consequently been less destruction of the old and young and that nearly all the young have been enabled to breed. Their geometrical ratio of increase, the result of which never fails to be surprising, simply explains their extraordinarily rapid increase and wide diffusion in their new homes.<\/p>\n <\/p>\n Pero sobre esta materia tenemos pruebas mejores que los c\u00e1lculos puramente te\u00f3ricos, y son los numerosos casos registrados de aumento asombrosamente r\u00e1pido de varios animales en estado salvaje cuando las circunstancias han sido favorables para ellos durante dos o tres a\u00f1os consecutivos. Todav\u00eda m\u00e1s sorprendente es la prueba de los animales dom\u00e9sticos de muchas clases que se han hecho salvajes en diversas partes del mundo; los datos sobre la rapidez del aumento en Am\u00e9rica del Sur, y \u00faltimamente en Australia, de los caballos y ganado vacuno -animales tan lentos en reproducirse- no habr\u00edan sido cre\u00edbles si no hubiesen estado muy satisfactoriamente autorizados. Lo mismo ocurre con las plantas; podr\u00edan citarse casos de plantas introducidas que han llegado a ser comunes en islas enteras en un per\u00edodo de menos de diez a\u00f1os. Algunas de estas plantas, tales como el cardo com\u00fan y un cardo alto, que son actualmente comun\u00edsimas en las vastas llanuras de La Plata, cubriendo leguas cuadradas casi con exclusi\u00f3n de toda otra planta, han sido introducidas de Europa, y hay plantas que, seg\u00fan me dice el doctor Falconer, se extienden actualmente en la India desde el cabo Comor\u00edn hasta el Himalaya, las cuales han sido importadas de Am\u00e9rica despu\u00e9s de su descubrimiento. En estos casos -y podr\u00edan citarse otros infinitos- nadie supone que la fecundidad de animales y plantas haya aumentado s\u00fabita y transitoriamente en grado sensible. La explicaci\u00f3n evidente es que las condiciones de vida han sido sumamente favorables y que, a consecuencia de ello, ha habido menos destrucci\u00f3n de adultos y j\u00f3venes, y que casi todos los j\u00f3venes han podido criar. Su progresi\u00f3n geom\u00e9trica de aumento -cuyo resultado nunca deja de sorprender- explica sencillamente su aumento extraordinariamente r\u00e1pido y la amplia difusi\u00f3n en la nueva patria.<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Pero no todo va a ser lucha despiadada, la tautolog\u00eda tiene tambi\u00e9n su lado bueno y as\u00ed cuando las condiciones sean favorables, ser\u00e1n m\u00e1s los que sobrevivan: The obvious explanation is that the conditions of life have been highly favourable, and that there has consequently been less destruction of the old and young and that nearly all the young have been enabled to breed. Their geometrical ratio of increase, the result of which never fails to be surprising, simply explains their extraordinarily rapid increase and wide diffusion in their new homes. La explicaci\u00f3n evidente es que las\u2026<\/p>\n","protected":false},"author":86,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[467,6726],"tags":[14300],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/134537"}],"collection":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/users\/86"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/comments?post=134537"}],"version-history":[{"count":2,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/134537\/revisions"}],"predecessor-version":[{"id":134539,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/134537\/revisions\/134539"}],"wp:attachment":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/media?parent=134537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/categories?post=134537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/tags?post=134537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}