Re: Sex change in fish

["William Vannerson" <William_Vannerson at ama-assn_org>]

>>I have read in the past about apparent sex changes in a number of fish.<<

Are the examples of nothos changing gender ...

(a) Real physiological changes where a fertile female actually becomes a fertile male?

(b) Real changes where a fertile female adopts a male posture and appearance but is still physically a female?

(c) Subordinate males that adopted a female appearance in the presence of a dominant male that takes on a normal male appearance once the dominant male is removed?

(I know that (c) happens in the cichlid world.)

Curious minds want to know.  :-)

Bill Vannerson
McHenry, IL
http://ourworld.compuserve.com/homepages/william_vannerson

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