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Blue Damselfish (Chrysiptera cyanea) Sex Determination
Wednesday, March 9, 2011 10:44 PM
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Can anyone tell me at what point and how the sex of Chrysiptera cyanea is determined during their development/life cycle? I'd also be interested to know what their sexual organization is.
<message edited by Hellaenergy on Wednesday, March 9, 2011 11:18 PM>
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 10:58 PM
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Are you referring to Chrysiptera cyanea, the Blue Damselfish, or Blue Devil? If so, from what I read, determination of the sexes based on external characteristics is difficult.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:10 PM
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Sorry I did mean Chrysiptera cyanea. Can someone please modify the title to reflect this change? From what I understand they are sexually dimorphic. I'm wondering how they get to be one sex or the other. Not how to determine the sex externally.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:13 PM
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You can edit the title by mousing over the reply button and choosing the "edit message" feature.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:21 PM
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Originally Posted by Fishtal
You can edit the title by mousing over the reply button and choosing the "edit message" feature. I tried that before but the title appeared to be non editable. Must be the late hours.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:26 PM
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Originally Posted by Fishtal
from what I read, determination of the sexes based on external characteristics is difficult. Now I'm confused. Everything I've read so far states that the males have a yellow or orange tale and the females do not. Do you have any information that states otherwise?
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:30 PM
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I was looking at Dr. Thresher's "Reproduction in Reef Fishes" book. It's an older book so some of the info may be outdated.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 9, 2011 11:44 PM
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 10, 2011 12:50 PM
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Does anyone know if the genus Chrys yptera even exists? I'm thinking not.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 10, 2011 12:57 PM
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 10, 2011 1:52 PM
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There is a different name used in the book: Glyphidodontops cyaneus. In the book he writes: "The only definite sexual dichromatism, however, is the most obvious. Males of the Indo-West Pacific species Glyphidodontops cyaneus, in some areas, are more brightly colored than the females and have a vibrant yellow-orange caudal fin lacking in the females; females, in turn, often have a yellow wash along the underside that is lacking in the male." This link lists the synonyms: http://fishprofiles.com/profiles/marine/Damselfish/
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Friday, March 11, 2011 10:28 AM
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Thanks Tal, I'm going to start digging for information using those synonyms now. Who knew there would be such little/hard to find information about such a common fish
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 16, 2011 12:24 PM
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Pomacentrids as a group,don´t show sexual dimorphism.One of the exceptions being the so called "devils"C.cyanea and C. taupou. The blue devil male´s tail fin is: Orange in most of it´s range,the colour sometimes spreading to the chest. Dark blue in the Philippines. There is also a morph without dimorphism,where both sexes show a clear tail fin. Hope this helps
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Wednesday, March 16, 2011 1:11 PM
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Originally Posted by luis a m
Pomacentrids as a group,don´t show sexual dimorphism.One of the exceptions being the so called "devils"C.cyanea and C. taupou. The blue devil male´s tail fin is: Orange in most of it´s range,the colour sometimes spreading to the chest. Dark blue in the Philippines. There is also a morph without dimorphism,where both sexes show a clear tail fin. Hope this helps Thanks for the reply, luis a m. A few questions: 1. How is sex determined from a biological perspective? 2. Can you tell me/us more about this morph without dimorphism? 3. Do you have any good references in regards to where you got this information?
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 17, 2011 1:42 PM
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Not sure I can satisfy you with any of your questions.Damsels are suspected to be sequential hermaph.(protogyn) ans seemingly that was established with Dascyllus.I believe that many,especially Chrysiptera are not. Not good references,just IME.
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 17, 2011 2:41 PM
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Originally Posted by luis a m
Not sure I can satisfy you with any of your questions.Damsels are suspected to be sequential hermaph.(protogyn) ans seemingly that was established with Dascyllus.I believe that many,especially Chrysiptera are not. Not good references,just IME. Thank you for chiming in nontheless. Have you successfully spawned and raised these guys? Any additional information about them you would like to share is welcome of course
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Re:Blue Damselfish (Chrysyptera cyanea) Sex determination
Thursday, March 17, 2011 3:59 PM
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