{"id":627082,"date":"2026-09-17T02:54:11","date_gmt":"2026-09-17T02:54:11","guid":{"rendered":"https:\/\/www.newsbeep.com\/ie\/627082\/"},"modified":"2026-09-17T02:54:11","modified_gmt":"2026-09-17T02:54:11","slug":"starting-with-a-male-and-female-rabbit-on-1-january-how-many-could-you-have-by-new-years-eve","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ie\/627082\/","title":{"rendered":"Starting with a male and female rabbit on 1 January \u2013 how many could you have by New Year\u2019s Eve?"},"content":{"rendered":"

Just how quickly could rabbits multiply if nothing stopped them? The answer is astonishing \u2013 and it\u2019s a question that has intrigued mathematicians for centuries.<\/p>\n

Italian mathematician Leonardo Fibonacci was pondering the reproductive potential of rabbits as far back as 1201. In his\u00a0Book of Calculations, he explored how a population might grow from a single pair, leading to the mathematical pattern now known as the Fibonacci Sequence.<\/p>\n

Under Fibonacci\u2019s assumptions, the rabbit population would eventually reach 466. But his model was based on some decidedly un-naturalistic assumptions \u2013 after all, Fibonacci<\/a> was a mathematician rather than a biologist.<\/p>\n

So what happens if we build a different model? We asked statistical modeller Tom Fiddaman of Ventana Systems<\/a> to crunch the numbers.<\/p>\n

His scenario assumes that European rabbits produce an average of five kits per litter and that their offspring become sexually mature at three months. Once mature, females produce a litter every month. The model also alternates the sex ratio of each litter: one litter contains three females and two males, followed by one with three males and two females.<\/p>\n

And there\u2019s one more crucial assumption:\u00a0none of the rabbits die.<\/p>\n

With all those conditions in place, the population would reach\u00a01,182 rabbits by New Year\u2019s Eve.<\/p>\n

And that\u2019s just the first year. By the end of year two, the theoretical population would have rocketed to around\u00a0345,000 rabbits.<\/p>\n

In reality, of course, rabbit populations face plenty of obstacles to such runaway growth. Disease, predation and fluctuations in food availability all help keep their numbers in check.<\/p>\n","protected":false},"excerpt":{"rendered":"Just how quickly could rabbits multiply if nothing stopped them? The answer is astonishing \u2013 and it\u2019s a…\n","protected":false},"author":2,"featured_media":627083,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[61,60,82],"class_list":["post-627082","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-ie","tag-ireland","tag-science"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/627082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=627082"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/627082\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/627083"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=627082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=627082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=627082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}