Genital Evolution: Cock-a-Doodle-Don’t
نویسنده
چکیده
Losing the penis in species with internal fertilization may seem paradoxical, but birds have managed to do it multiple times. A new study addresses one developmental mechanism responsible for penis reduction in birds, and opens the door to further examination of this little understood evolutionary phenomenon.
منابع مشابه
Optimizing time and convenience in group scheduling
We consider the situation in which a group of agents are trying to find an agreeable time for a meeting. Each agent’s availability is governed by a known prior probability distribution, but the realization of it is private information. The goal (of the convener) is to find an agreeable time slot while optimizing in two dimensions: Expected time to reach agreement and expected inconvenience caus...
متن کاملThe Mathematics of Doodling
Wondering about a childhood doodle compels us to ask a series of questions, which will lead us on a tour of increasingly sophisticated ideas from many parts of mathematics. Let me tell you about a doodle I did when I was very small, and the mathematics that flows inevitably from it. It looks like play, but in my mind this is what mathematics is really about: finding patterns in nature, explaini...
متن کاملSexual and Natural Selection Both Influence Male Genital Evolution
Rapid and divergent evolution of male genital morphology is a conspicuous and general pattern across internally fertilizing animals. Rapid genital evolution is thought to be the result of sexual selection, and the role of natural selection in genital evolution remains controversial. However, natural and sexual selection are believed to act antagonistically on male genital form. We conducted an ...
متن کاملSexual selection and the evolution of genital shape and complexity in water striders.
Animal genitalia show two striking but incompletely understood evolutionary trends: a great evolutionary divergence in the shape of genitalic structures, and characteristic structural complexity. Both features are thought to result from sexual selection, but explicit comparative tests are hampered by the fact that it is difficult to quantify both morphological complexity and divergence in shape...
متن کاملApproval Voting Behavior in Doodle Polls
Doodle is a simple and popular online system for scheduling events. It is an implementation of the approval voting mechanism, where candidates are the time slots and each responder approves a subset of the slots. We analyze all the Doodle polls created in the US from JulySeptember 2011 (over 340,000 polls), consisting of both hidden polls (where you cannot see other people’s votes) and open pol...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Current Biology
دوره 23 شماره
صفحات -
تاریخ انتشار 2013