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Sinogastromyzon spp.
February 11, 2011
8:43 am
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Matt
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I'm awaiting emails responses from various folk on other loach genera so will add profiles for S. puliensis and S. wui (the only two we have images for) in the meantime.

Any upkeep or interesting behavioural information much appreciated! Is it correct these prefer a meatier diet than, say, Gastromyzon spp.?

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February 11, 2011
9:59 am
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Mark Duffill
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I have only heard of them having the odd nibble at algae wafers Matt, from my experiance and what I have been told they will always go for artemia, bloodworm etc over grazing or pellets etc, the wui that I had loved mysis shrimp and would even push the sewellia spotted out of the way to get them.

February 11, 2011
10:50 am
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Matt
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That's great Mark - has any sexual dimorphism been observed?

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February 11, 2011
12:14 pm
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Mark Duffill
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Not to my knowledge Matt, I think I went by similar to Sewellia, females wider body, and more angular in shape were leading edge of pectoral meets face, males more slender and more streamlined look to snout and leading edge of pectoral fin, but that isnt 100%

February 11, 2011
12:47 pm
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Matt
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Guessing sexually mature males will develop head/snout tubercules too but haven't seen any pics to confirm that.

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February 11, 2011
1:20 pm
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Mark Duffill
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I have never seen that either Matt so cant say for definate

February 11, 2011
1:52 pm
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torso
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QUOTE (Matt @ Feb 11 2011, 09:26 AM) < {POST_SNAPBACK}>
Any upkeep or interesting behavioural information much appreciated! Is it correct these prefer a meatier diet than, say, Gastromyzon spp.?

yes they do. and lots. they really need good aeration. seems they run on a higher energetic level.
s. wui are the most hiding I have; just 4 or 5 five good pics in years. and not very sociable; have no problems to match other species. s. pulienis are very different: more the smooth type.
one thing with s. puliensis intrigates me: a species on the red list since 1989 and now and then in the market ...
sexing is easy by bodyshape

February 11, 2011
2:21 pm
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Matt
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QUOTE (torso @ Feb 11 2011, 02:35 PM) < {POST_SNAPBACK}>
one thing with s. puliensis intrigates me: a species on the red list since 1989 and now and then in the market ...

I've just written something about that in the profile not one hour ago Charles. I have a paper that says they were only allowed to collect very limited numbers for scientific work due to restrictions imposed by the Taiwanese Agricultural Department. In that case, how is the fish being exported for the aquarium hobby? Illegally? Or is it not S. puliensis?

P.S. what do you mean by 'smooth'?

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February 11, 2011
3:07 pm
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odyssey
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2 kinds of Sinogastromyzon is in my tank at present.
They have come to my tank, S.wui is 5 years before, and S puliensis is 2 years before
The hill climbing ability of S.puliensis is most excellent in Hillstream Loaches according to my experience.

They eat an alga, but a bloodworm is also a favorite.

Sinogastromyzon tends to like the wider surface compared with other Hillstream loaches.
They rarely get away from the glass face.
They don't like the small and unstable surface.

I thought you probably knew already, but it was raised in LOL before.
http://forums.loaches.com/view.....hp?t=16879
http://forums.loaches.com/view.....38;t=22166

February 11, 2011
3:53 pm
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Matt
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Diagnostic characters for S. puliensis - text from the unfinished profile:

No scales on upper surface of paired fins or the area between underside of pectoral fin origin and pelvic fin origin; presence of spots on upper surface of pectoral fin base; pelvic fins extending beyond anus; regular dark blotches present on dorsal surface of body; caudal peduncle length less than caudal peduncle depth; 60–65 lateral-line scales; 23–25 predorsal scales.

Charles' fish:

[Image Can Not Be Found]

[Image Can Not Be Found]

Odyssey's fish:

[Image Can Not Be Found]

[Image Can Not Be Found]

Attached files

[Image Can Not Be Found] [Image Can Not Be Found] [Image Can Not Be Found] [Image Can Not Be Found]

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February 11, 2011
7:19 pm
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torso
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beautiful specimen, odyssey /rolleyes.gif" style="vertical-align:middle" emoid=":rolleyes:" border="0" alt="rolleyes.gif" />
a strong female. as in gastromyzon the females are dominating
I'll send you some better ones, Matt
cheers Charles

February 11, 2011
7:51 pm
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Matt
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QUOTE (Matt @ Feb 11 2011, 03:04 PM) < {POST_SNAPBACK}>
I've just written something about that in the profile not one hour ago Charles. I have a paper that says they were only allowed to collect very limited numbers for scientific work due to restrictions imposed by the Taiwanese Agricultural Department. In that case, how is the fish being exported for the aquarium hobby? Illegally? Or is it not S. puliensis?

P.S. what do you mean by 'smooth'?

Bump. /tongue.gif" style="vertical-align:middle" emoid=":p" border="0" alt="tongue.gif" />

Oh and yes please to more pics!

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February 13, 2011
4:11 pm
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Matt
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Hmm, following the images in A Photographic Guide to the Inland-water Fishes of Taiwan - Vol.1 Cypriniformes, and assuming they're from Taiwan, the fish pictured above are closer to S. nantaiensis than S. puliensis based on the pectoral fin and dorsal surface patterning. /wacko.gif" style="vertical-align:middle" emoid=":wacko:" border="0" alt="wacko.gif" />

P.s. here are a couple of interesting images from Liao, Te-Yu, Chi-Chun Pan and Chyng-Shyan Tzeng. 2008. Migration of Sinogastromyzon puliensis (Teleostei: Balitoridae) in the Choshui River, Taiwan. Ichthyol. Explor. Freshwat. 19(3): 193-200.

It seems that newly-hatched fry of this species are washed downstream then migrate back once they develop adult morphology. Construction of a weir on this river means they need to use a fish ladder to do so. Unfortunately the design of the weir means that water exiting it on the downstream side has eroded the river bed resulting in a cascade of around a metre in height which the fish are unable to pass unless they literally climb the wall at the entrance.

First pic shows the route they take and second a group congregating at the entrance to the ladder:

Attached files

[Image Can Not Be Found] [Image Can Not Be Found]

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February 13, 2011
7:47 pm
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Kajsa12
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QUOTE
and assuming they're from Taiwan

I'm not sure about that. Mine came from a supplier in Singapore and were labelled Beaufortia leveretti.

H1.jpgImage Enlarger

sinogast3a-1.jpgImage Enlarger

Sinogastromyzon3-1.jpgImage Enlarger

Sinogastr1.jpgImage Enlarger

February 13, 2011
9:55 pm
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torso
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I remember a video on youtube "treasure in the water-the endemic freshwater fisches of taiwan" by the governement. can't find the link. there s. pulienis is to be seén. you know it already, Matt?

found it

http://video.coa.gov.tw/eng/my.....a_seq=2724

February 14, 2011
8:00 am
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Matt
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Thanks Charles - I haven't seen it but can't view from work so will watch tonight. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

Great new pics, by the way. I've sent some of the images from you and Odyssey to a Korean ichthyologist I sometimes exchange messages with. Let's see if he has an opinion.

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February 23, 2011
8:11 am
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Matt
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So my friend says S. nantaiensis is always misidentified as S. puliensis when traded between Taiwan and Japan but that doesn't really help in terms of the fish reaching Europe and the United States.

More digging to do.

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February 23, 2011
1:18 pm
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odyssey
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Hi.
I didn't understand a Taiwanese language, but I searched for a transcribed site in a Taiwanese language.

It seems to be explaining the difference between S.puliensis and S.nantaiensis by this site.
http://blog.xuite.net/snakejoa.....e/30284608

There were other such sites.
http://bbs.mychat.to/reads.php.....tid=543267

http://www.tbg.org.tw/tbgweb/c.....-bin/topic...rt=0&show=0

http://163.23.91.129/xoops2016.....odules/new...php?post_id=789

February 24, 2011
8:16 am
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Matt
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Thanks Odyssey. /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

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February 25, 2011
8:53 am
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Matt
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QUOTE (torso @ Feb 11 2011, 02:35 PM) < {POST_SNAPBACK}>
sexing is easy by bodyshape

Can anyone supply more details?

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