Naked Science Forum

Life Sciences => Physiology & Medicine => Topic started by: tuhin on 30/03/2003 09:58:11

Title: How did hermaphroditism evolve in animals?
Post by: tuhin on 30/03/2003 09:58:11
Lower population density has been cited as one reasons for the evolution and the significance behind the development of hermaphroditism in animals.
Although this may be partially true in case of simultaneous hermaphroditism, this reasoning does not sound very logical when we consider the protandric hermaphrodites.
Can anyone give me a better answer to the evolution and significance behind the development of hermaphroditism considering both simultaneous( when both male and female sexual organs remain simultaneously in the same individual ) and protandric (  male organs develop first only to degenarate later, female organs develop then)?
Title: Re: How did hermaphroditism evolve in animals?
Post by: pat on 30/03/2003 10:05:58
quote:
Originally posted by tuhin

Lower population density has been cited as one reasons for the evolution and the significance behind the development of hermaphroditism in animals.
Although this may be partially true in case of simultaneous hermaphroditism, this reasoning does not sound very logical when we consider the protandric hermaphrodites.
Can anyone give me a better answer to the evolution and significance behind the development of hermaphroditism considering both simultaneous and protandric?


Dear Tuhin, no offense mate...but

can anyone translate this into english ?

What is a Protandric hermaphrodite when it's at home ?

Pat
Title: Re: How did hermaphroditism evolve in animals?
Post by: tuhin on 30/03/2003 12:57:24
Dear Pat,
Protandric hermaphrodites are animals in which the male reproductive organs develop first only to degenerate later. It is then the female reproductive organs develop to stay for the remaining part of the life.
Title: Re: How did hermaphroditism evolve in animals?
Post by: Monox D. I-Fly on 24/08/2017 05:17:15
Quote from: tuhin on 30/03/2003 12:57:24
Dear Pat,
Protandric hermaphrodites are animals in which the male reproductive organs develop first only to degenarate later. It is then the female reproductive organs develop to stay for the remaining part of the life.


Like anglerfish?
Title: Re: How did hermaphroditism evolve in animals?
Post by: chris on 24/08/2017 07:47:19
Protandric hermaphrodites are animals that start life as males and at some point switch to become female. I don't think that's the same as species where the male regresses to become just a supply of gametes, which is what happens in angler fish, I believe...
Title: Re: How did hermaphroditism evolve in animals?
Post by: Monox D. I-Fly on 25/08/2017 02:49:36
So, what's the example? Sea horses?
Title: Re: How did hermaphroditism evolve in animals?
Post by: chris on 25/08/2017 22:41:07
Clownfish are a good example: https://en.wikipedia.org/wiki/Sequential_hermaphroditism