LOGIN

RSS Facebook Twitter YouTube
GLOSSARY       

SEARCHGLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

PROFILESEARCH

New Sewellia?

Home Forums Fresh and Brackish Water Fishes New Sewellia?

This topic contains 0 replies, has 1 voice, and was last updated by  Menu 5 years, 4 months ago.

Viewing 15 posts - 1 through 15 (of 57 total)
  • Author
    Posts
  • #302242

    Plaamoo
    Participant
    #348162

    mikev
    Participant

    I believe that Sewellia is the one Saigon Aquarium distributes as “S.breventralis” (wrong name). The intriguing part is if the shipment contains the 2nd species (recall the recent discussion)… I actually asked Anthony about this, he said all fish looks alike,…well, who knows.

    As for the other fish, as a guess it is some Annamia, likely undocumented… and I vaguely recall Matt saying something about this in profiles somewhere… even if he was talking about Saigon Aquarium exports, and this seems like another company, it still looks like an Annamia to me….

    (I got some fish from Anthony yesterday… not these two, had to grab two other things he was running out…)

    #348163

    Plaamoo
    Participant

    You keep telling me your full up. Then in the next message it’s ” I got some new fish yesterday”:D You should get 20 of each of these to see what they are.

    #348164

    mikev
    Participant

    20 at $15? I’m crazy but not this crazy. 😥  Besides I’m pretty sure I know what they are, I still have some of these Sewellia’s (I bred them)…. and I still have one Annamia surviving from that ich-infested batch. 🙁

    Nay, seriously the space is quite short.  I can fit only very small fish….

    #348170

    Matt
    Keymaster

    Sewellia looks like this one Jim?

    #348181

    Plaamoo
    Participant

    Thanks Matt. Had forgotten about that one.

    #348184

    mikev
    Participant

    Matt,

    Some questions on Sewellia profiles:

    What is the difference between Sew02 and Sew03? — seem like the same species?

    Do we know for a fact that Sew04 is a Sewellia?

    Sew04 profile includes a section on Reproduction: does this imply that it was bred? (because if it was never bred in Aquaria the relevance is not clear…and we don’t even know for a fact it breeds like Sewellias!)

    While we are here….  a couple of Sew04 shots possibly showing both sexes:

    http://www.micropress-inc.com/fishpic/sew-unk-fm.jpg

    http://www.micropress-inc.com/fishpic/sew-unk-m.jpg

    One interesting difference is that in the second photo the area at the base of the side fin is reflective, in the other it is simply light. The sizes are proportional to the photos, the fish is likely full grown in both cases… making me think that this shows both sexes… not guessing which is which.

    #348187

    Matt
    Keymaster

    SEW02 and SEW03 might well be the same species Mike, I’ve no idea. We ordered the profiles according to general consensus of those taking part in discussion when they were written, direct observation from those keeping them, and an article published in Amazonas magazine during 2010.

    What makes you think SEW04 isn’t a Sewellia?

    #348188

    mikev
    Participant

    On Sew02 and Sew03: given the obvious similarities in the supplied photos for the two “species” it should be necessary to supply at least some hints on how they differ! Otherwise, just how do we know if the newest Sewellia import is Sew02 or Sew03? I kept this fish for three years too, and all photos in both profiles match the fish I had.. seriously, can I see the discussion that led to this decision? Perhaps there was a key of some kind there?

    As for Sew04: I have no idea what this is.  That Sew02 (aka Sew03) is a Sewellia seems plausible based on its breeding and fry’s similarity to other Sewellia (albeit the behavior of 02/03 is very different of other Sewellias!);  about Sew04 we know too little. Quite possibly a Sewellia, quite possibly not. But whether it is a Sewellia or not, we really do not know if it is sufficiently similar to other Sewellia species so that the information in the Reproduction and Sexual Dimorphism applies to it.  (Please correct me if I missed the big event, but Sew04 was not bred in aquaria so far, right?  and there is no photo anywhere that shows sexed Sew04?) 

    #348190

    torso
    Participant

    hi mikev

    SEW02nd SEW03 are different in regard to the pattern. So far I have no scientific evidence. But I could furnish some pics to discuss the matter as soon I find the time. Behaviour difference in other Sewellias? Not significant as far as I could notice the last 4 years.

    SEW04 hasn’t been bred as far as I know. It’s the only sewellia-species I haven’t had success. But as a matter of fact I didn’t really insist so far. And I have pics for the easier sexing. Pic 1,3,4 in the profile show a male. Pic 2 (underside) shows a female. Just the classic differences. They’re like the other Sewellias. Your pics show a pair. Lucky you!

    cheers Charles

    #348192

    Matt
    Keymaster

    So SEW04 can be sexed as per other Sewellia spp. Charles?

    Do you think SE02 and SE03 are different enough to warrant separate profiles in the absence of scientific confirmation?

    Mike, there was no key but the relevant thread can be found here. Stuff like this is sometimes based more on guesswork than anything else, and of course mistakes may occur. It’s quite common for a new loricariid species to be described which is subsequently found to refer to more than one ‘L’ or ‘LDA’ number, for example.

    It would of course be preferable to supply details on how SEW02 and SEW03 differ, if they are indeed distinct, and as always I’m fully willing to make changes or improvements to the profiles if we can agree on what those should be.

    #348193

    mikev
    Participant

    On Sew04: thanks Charles… I do think I have both sexes finally, either 1m/2f or 2m/1f (this took only 3 years), but do you have a guess on which one is a male, which one is female?  Unfortunately, I can argue both ways! And I could not find any differences in underside views!

    Being able to reliably sex them would not just be nice in itself, it also will be a supporting argument for them being Sewellia’s. And of course having labelled photos of both sexes in the profile would be helpful.

    On Sew02/Sew03: let me recheck the linked thread carefully and get back to you.

    #348196

    torso
    Participant

    Hi mikev

    some pics. The difference: male’s first pectoral ray thinckened – makes it look like the fin having a bow forward, slimmer body, more tusewellia-sp-DSC_0989.jpgsewellia-sp-DSC_2270.jpgsewellia-sp-CSC_2284.jpgsewellia-sp-CSC_2507.jpgsewellia-sp-CSC_3050.jpgsewellia-sp-CSC_2754.jpgsewellia-sp-CSC_3045.jpgsewellia-sp-DSC_3015.jpgsewellia-sp-DSC_2101.jpgbercles.

    Six/four pics.

    for the AMAZONAS picssend me your e-mail.

    Cheers Charles

    #348198

    mikev
    Participant

    Email sent by PM. Thanks.

    Yes, but which is which on your photos? In particular, let me ask again: you apparently saw the difference in my photos, which one do you think is a male?

    (be blind, but I was looking for something like this since it occurs in other sewellia’s and I could not be certain.—if sexing indeed can be accomplished by “fences”, it is less pronounced than in other species.)

    #348197

    torso
    Participant

    Hi mikev

    sorry,may be it looks to easy to me: in your pics the first is a female, second a male. In my pics: first five (had to eliminate a double one) show males, next four females. The thickened first pectoral ray of the males makes it look a little like rectangular, the female’s fin looks smother. The body of the females is fuller seen from above and underside. Of course S. lineolat shows a classic “fence” which is not to be seen in other species.

    Cheers Charles

Viewing 15 posts - 1 through 15 (of 57 total)

You must be logged in to reply to this topic.