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Article #1153FISH: sex ratio of 1 male : 100 females, why?
From: J.M. Spencer
Date: Thu, 27 Sep 1990 14:24
Date: Thu, 27 Sep 1990 14:24
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A recent TV program showed a species of fish which was yellow and lives in the Red Sea, but I've forgotten the name. The odd thing about this species is that they maintain a sex ratio of 1 male to every 100 females. When the male dies, the *largest* female turns into a male. Questions: 1. How do the fish know when they have the correct ratio? i.e. how do they discriminate between 1:90 and 1:100? 2. What survival advantage does the species gain from this? ----------------------------------------------------------------------------- Sender : Jonathan M Spencer Mail : Computing Lab, University of Newcastle-upon-Tyne, NE1 7RU, UK Phone : +91 222 8229 ARPA : J.M.Spencer%newcastle.ac.uk@cs.ucl.ac.uk JANET : J.M.Spencer@uk.ac.newcastle UUCP : !ukc!newcastle.ac.uk!J.M.Spencer
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!mcsun!ukc!newcastle.ac.uk!turing!q1ygq From: J.M.Spencer@newcastle.ac.uk (J.M. Spencer) Newsgroups: sci.bio Subject: FISH: sex ratio of 1 male : 100 females, why? Message-ID: <1990Sep27.142437.21755@newcastle.ac.uk> Date: 27 Sep 90 14:24:37 GMT Sender: news@newcastle.ac.uk Organization: Computing Laboratory, U of Newcastle upon Tyne, UK NE1 7RU. Lines: 20