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Spaerichthys osphromenoides

Home Forums Fresh and Brackish Water Fishes Spaerichthys osphromenoides

Viewing 10 posts - 1 through 10 (of 10 total)
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  • #300023

    Matt
    Keymaster

    Hey all we had this email sent in today:

    QUOTE
    Hello!

    I would like to make a comment on the article written about Sphaerichthys osphromenoides. The author writes that the males are mouthbrooding but that is not correct. With osphromenoides, or the common chocolategourami, females are mouthbrooding. It is opposite with Sph. vaillanti. In that genus the females are most dominant and therefore the males are mouthbrooding among vaillanti.

    I bred the common chocolate so I know from experience ;-). (sorry for my bad english)

    Regards,

    Wendy van der Heeden
    Rotterdam, the Netherlands

    Now when I researched the species I found that pretty much all resources say this is a maternal mouthbrooder. However I also found some information stating that a scientist in Japan had dissected a load of Sphaerichthys selatanensis (super-closely related to osphronemoides; see the profile for pics of both species) and found that males are in fact the ones who perform mouthbrooding duties and females are the more colourful fish. The same is also true for S. vaillanti. Now I’m confused. I find it difficult to believe that the breeding strategy and sexual dimorphism between two such similar species could be completely reversed. Anyone got any clues?

    #312371

    Mark Duffill
    Participant

    I have to admit Matt that I always thought it was the males that did the mouthbrooding, I did a quick search around and there are one or two sites that state the females does it but on the whole I think common consensus is that it is the male

    #312377

    David Marshall
    Participant

    Hey Folks

    Wendy is correct in her statement. Would love to be able to tell you more but we are running 3 exclusive articles, which I have just placed onto the copyboard, on the Chocolate gourami group in The Aquarium Gazette Issue 9.

    Regards David

    #312378

    Matt
    Keymaster

    Lol ok David… /rolleyes.gif” style=”vertical-align:middle” emoid=”:rolleyes:” border=”0″ alt=”rolleyes.gif” /> Can you at least tell us if S. selatanensis is a confirmed paternal mouthbrooder?

    #312385

    David Marshall
    Participant

    Hey Matt

    I was relating to Wendy’s , who does not mention selatanensis, letter. Wendy’s information tells us that female o. and male v. are the ones who orally incubate eggs/fry and, from the information in the articles (and wonderful photographs that accompany an article on breeding S.v.) this is correct.

    Have not seen the Japanese work but the work of fellow academics points towards the female brooding eggs/fry in selatanensis. If this is not the case then selatanensis may turn out to be a species in its own right instead of having the sub-specie classification it is currently assigned.

    Regards David

    #312386

    Matt
    Keymaster

    Ok well none of this makes any sense to me as the two are so closely-related…..sigh. I do know that S. selatanensis is already an officially distinct species though. David this is a bit cheeky but do the pictures show the same fish laying and collecting eggs?

    #312388

    David Marshall
    Participant

    Hey Matt

    The spawning sequence is of S.v. It shows the pair embracing, spawning, the male orally incubating eggs and much more.

    I honestly think that the situation regarding full or sub-status for selatanensis is very confused.

    Regards David

    #312393

    Matt
    Keymaster

    Haha you’ve actually got me wanting to read issue 7 now you wiley old salesman! /tongue.gif” style=”vertical-align:middle” emoid=”:p” border=”0″ alt=”tongue.gif” /> And send the lovely Wendy a thank you mail of course.

    #312397

    David Marshall
    Participant

    Hey Matt

    Do you mean Issue 9? If so you will have to save those pennies for June, although if you would like a copy of the wonderful Issue 7 we can have a PDF copy with you ASAP for a £3 Paypal payment.

    I think I will ‘close the book’ on Chocolate’s until our articles are published.

    Regards David

    #313246

    thedonothan
    Member

    Having bred them myself, mommy definitely does the work, while daddy keeps all the other fish away from her.

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