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Danio kyathit vs. D. quagga

Home Forums Fresh and Brackish Water Fishes Danio kyathit vs. D. quagga

This topic contains 0 replies, has 1 voice, and was last updated by  Matt 4 years, 4 months ago.

Viewing 11 posts - 1 through 11 (of 11 total)
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  • #302582

    Matt
    Keymaster

    Aquarium Glaser are currently selling the striped form of D. kyathit as D. quagga, but wasn’t aware the id had been confirmed? Does anyone know more?

    413612-danio-kyathit-mann.jpg413603-danio-quagga-maenner.jpg

     

    #350080

    mikev
    Participant

    I’m sure you have this one….

    #350083

    Matt
    Keymaster

    I have, and the fish does closely match the description. Just never seen the id confirmed 100% anywhere. 

    #350084

    BillT
    Participant

    Nice pictures. Interesting question. How would you confirm the species ID?

    Color and stripes, morphology?

     

    I went back and looked at the paper where quagga is described: Kullander, Liao and Fang. (2009). Danio quagga, a new species of striped danio from western Myanmar (Teleostei: Cyprinidae). Ichthyol. Explor. Freshwaters, Vol. 20, No. 3, pp. 193-199 (available on the web I think).

    They distinguish it from the spotted form of kyathit from quagga by the stripes vs spots and also by the barbel length. I have found some pictures good for looking at barbel length. The quagga picture above has shorter barbels then the spotted kyathit in the above post, which conforms to the description. The few pictures of a stripe form of kyathit I have do not show the barbels well. Presumably the barbels on the striped kyathits should be similar to those of the spotted.

    Other distinguishing features mentioned in the article are a variety of morphological length measurements (% of SL) most of which are overlapping distributions. There are slight differences in head length and pec fin length (quagga smaller for both). To me they both these comparisons look appropriate in the pictures.

    Branched anal fin rays are supposed to be 12 or 13 in quagga and 13-14 in kyathit. I counted 14 in the spotted kyathit above and 12 in the striped fish but the front of the anal fin is not entirely clear.

     

    It would be nice if we could get some of these fish in the US.

    #350086

    Matt
    Keymaster

    Hi Bill, same here really. The colour pattern matches the diagnosis but haven’t yet seen an image where the barbels are clearly visible.

    Provided the barbels also match the description the id should be relatively solid since they’re the only two obvious external differences according to the paper. Ot at least, that’s how I view it.

    #350093

    torso
    Participant

    Hi Matt

    should I take some pics? Tried to work out with the older pics but they are not good enough.

    My group has arrived mixed. Now they go with different names.

    Cheers Charles

    #350095

    Matt
    Keymaster

    Yes please Charles, that should help a lot. 🙂

    #351252

    torso
    Participant

    I did it, Matt

    As far as I can see: differences within the types. Sometimes shorter, sometimes longer. All in all they seem to be longer in the striped type. danio-sp-kyathit-CSC_7317.jpgdanio-sp-kyathit-CSC_7313.jpgAs they are to fast to get close-up pics I may show just pics of the entire specimen.

    #351262

    Matt
    Keymaster

    Hm, the barbels shouldn’t reach beyone the eye in D. quagga. What’s your feeling Charles?

    Did you get some pics of the striped form as well?

    #351288

    torso
    Participant

    I have to check it, Matt.

    My feeling? Same species. As far I can see, there are specimen with dotts and stripes. Either they already hybridized in the wild or it’s the same species. Not D. quagga I would say.

    #351317

    Matt
    Keymaster

    Ok thanks Charles, still can’t decide myself. :-/

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