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Brachyrhaphis Hartwegi

Home Forums Fresh and Brackish Water Fishes Brachyrhaphis Hartwegi

This topic contains 23 replies, has 6 voices, and was last updated by  johnpeten 9 years, 7 months ago.

Viewing 15 posts - 1 through 15 (of 24 total)
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  • #300463

    johnpeten
    Participant

    I am taking a break from cichlids for the moment. My boys brought a netfull of these livebearers up from the shallows. This is the only Brachyrhaphis found in Guatemala. What there is available in databases, states that both sexes are identical but males can be identified by their gonopodium. Which I notice is very obvious /laugh.gif” style=”vertical-align:middle” emoid=”:lol:” border=”0″ alt=”laugh.gif” />
    However the photo shows what I have stated above but the female has the usual slight abdomenal bulge and the male is perfectly slim.
    They have settled in very quickly. They are surface feeders on insects that fall into the water but they are feeding happily on crushed flake and FD bloodworms, scooping the surface like Mollies..
    There are about 30 from about 3/4 of an inch to an inch.
    The locals call them poopos. I haven’t figured that out yet.

    Attached files

    #315786

    keith565
    Participant

    wow, you lucky so and so,lol. what i would give to have these kinds of fish in my neighbourhood.
    any chance of getting more pics as i think the flash may have wiped out a bit of their colour?
    although this is not the most colourful of the species, i think roseni has to be the nicest brachy in my opinion.

    #315787

    pablito
    Participant

    The locals call them poopos. I haven’t figured that out yet.
    [/quote]

    John is there any part of the local domestic sewage system that does or used to drain into the lake?
    This might explain the local nickname.

    #315788

    johnpeten
    Participant

    QUOTE (pablito @ Dec 20 2009, 02:53 AM) < {POST_SNAPBACK}>
    John is there any part of the local domestic sewage system that does or used to drain into the lake?
    This might explain the local nickname.


    Hi Pablito.
    Comprendo lo que tu dices.
    That is what I thought they were saying and questioned them about this. The pronunciation is slightly different.
    On this side of the Lake we don’t have any sort of sewage system.
    I will get my boys to write down the words, perhaps I can get a better phonetic version of both the words in question.
    John

    #315789

    coelacanth
    Participant

    QUOTE (pablito @ Dec 20 2009, 08:53 AM) < {POST_SNAPBACK}>
    John is there any part of the local domestic sewage system that does or used to drain into the lake?

    He always has to bring it down to the scatological doesn’t he? The man’s obsessed with anything to do with the “porcelain aquarium”!

    #315790

    johnpeten
    Participant

    QUOTE (keith565 @ Dec 20 2009, 02:45 AM) < {POST_SNAPBACK}>
    the flash may have wiped out a bit of their colour?
    although this is not the most colourful of the species, i think roseni has to be the nicest brachy in my opinion.


    B.roseni one of the most recently described B. species, bringing the total to eleven is certainly the prettiest.
    Our hartwegi have very little colour but I attach some more photos. Some of the females have what I first thought to be gravid spots. They are a deeper blue colouration. Perhaps they are gravid spots?

    Like yourselves our weather has deteriorated. The daytime highs have dropped down to a chilly 27° C

    Attached files

    #315794

    Matt
    Keymaster

    I’m already surrounded by caganers and now we have a poo-fish…

    #315796

    johnpeten
    Participant

    QUOTE (Matt @ Dec 20 2009, 09:00 AM) < {POST_SNAPBACK}>
    I’m already surrounded by caganers and now we have a poo-fish… /blush.gif” style=”vertical-align:middle” emoid=”:blush:” border=”0″ alt=”blush.gif” /> but it is a major feature and necessary I suppose.
    I found a comment from a hobbyist that this genera females produce about 25 fry once a month. I will try and net one of the larger females with a gravid spot and put her in a breeder to try and save some fry.
    John

    Attached files

    #315797

    Matt
    Keymaster

    Yeah I thought it’d be a new record, very cool indeed. From what I’ve been reading today the females of some Brachyrhaphis spp. have evolved to use their anal fin colouration in social interactions but hartwegi is said to be the species in which this has developed the least i.e. the anal fin of females and gonopodium in males are more typical of other Poeciliids in form.

    If you liked the caganer stuff you’ll probably also find the Tió de Nadal, better known as ‘Caga tió’ (sh**ting log), tradition amusing.

    #315804

    johnpeten
    Participant

    I have now sorted out the local name for these livebearers. They are pupo or bute. The other stuff is popo. During casual conversation I discover that a much larger fish about 3 to 4 inches exists, which looks like this livebearer. I am assured it is identical but cannot be of course. This is another challenge for the boys to capture. They also assure me that a completely black fish exists which looks like a female swordtail, yet another challenge for them.
    They have had their final briefing and supplied with their camping basics. They will leave at first light on Monday for the jungle. They will return on Wednesday hopefully with freshwater shrimp and cichlids indigenous to the Usumacinta drainage. The weather forecast does not look good and they will need the waterproof ponchos that I have supplied.

    #315806

    johnpeten
    Participant

    Having studied all the available data, mostly supplied by Matt. this species has not been found on the Atlantic slope of Guatemala. The fish frequents the Lake Peten shallows in abundance and is hard not to notice. My only conclusion is that nobody has looked and during the investigation into Brachyrhaphis in the 80s our civil war was in full progress and nobody came here.

    The comments by my boys that a much larger fish, apparently identical exists, is very valid.
    This is the Belonesox.belizanus listed as found in Lake Peten, with the male growing to 8 inches and the female to about 5 inches. Not a friendly fish for the aquarium as it is predator with large mouth and teeth.

    Attached files

    #315807

    johnpeten
    Participant

    During the Phylogeny study( development of a group: the evolutionary history of a species, genus, or group) of Brachyrhaphis the following remarks were made:-
    Brachyrhaphis holdridgei,B . roseni,B . rhabdophora, and B. punctifer resemble the deep-bodied B. episcopi and B. terrabensisin body depth and color pattern. All have black, orange, yellow, and/or red pigments accenting their fins; olivaceous bodies; and vertical bars along the flank. Brachyrhaphis cascajalensis and B. parismina lack these pigments, whereas B. hartwegi is yellow throughout.

    I have now been able to take some photos without flash, using ISO 400 (loss of quality)
    Thanks Keith for goading me into the effort.

    Attached files

    #315810

    Matt
    Keymaster

    Hmmm, they look more yellowish in those shots and you can also see the dark lateral stripe on the female which is mentioned in some of the papers. They’re definitely not young Belonesox that’s for sure…

    Your “boys” have an enviable job.

    #315815

    johnpeten
    Participant

    Belonesox.belizanus inaptly named the top minnow is the largest member of the Poeciliidae family.
    I mentioned that it would not be a friendly candidate for the Aquarium.
    However if anybody should have the urge here is a drawing of its skull. It would be sensible not to dangle ones fingers in the tank

    Attached files

    #315818

    Matt
    Keymaster

    …or gonopodium, presumably…

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