Central Kalimantan black waters

panaque · Post by **panaque** » 30 Jul 2016, 06:40

The last couple of weeks I have been on an expedition into forest on the left bank of the Sungai Rungan, Central Kalimantan (Indonesian Borneo). The substrate there was peat of varying depth and the water in the streams was stained like tea with pH of 3.5 - 4. Unseasonally heavy rain caused flooding which made fishing tricky but I still found plenty of interesting species.
Catfish first (others will follow later)
Hemibagrus capitulum? @Silurus?

Note extent of barbel:

? (based on close proximity to type locality)

Lager specimen:

YouTube · Post by **Jools** » 30 Jul 2016, 08:24

Great to see that fish alive assuming the ID is correct.

Jools

panaque · Post by **panaque** » 30 Jul 2016, 12:07

Jools wrote:Great to see that fish alive assuming the ID is correct.

Jools

Yes let's see what Silurus thinks. Happy for you to use photos of course. Here's another one of the Silurichthys

I caught them at night, swimming at the surface right in the middle of our flooded camp

YouTube · Post by **Jools** » 30 Jul 2016, 17:24

Wow. What is going on there. Did it flood overnight or what?

Jools

panaque · Post by **panaque** » 31 Jul 2016, 02:18

Jools wrote:Wow. What is going on there. Did it flood overnight or what?

Yes, quite epic overnight storm. We had another one two days later and that bench with the boots on disapeared under water too. Since we spent much of our days wading through swamps anyway, a flooded camp didn't make that much difference to life. The acidity of the water prevents trench foot thankfully.

Bas Pels · Post by **Bas Pels** » 31 Jul 2016, 09:34

panaque wrote: The acidity of the water prevents trench foot thankfully.

An important consideration

Once in Uruguay I did not pay enough attention to drying my feet - after all, I would go into another water in an hour, and the next a furhter hour away - but after a day or two I thought my feet were changing.

Nothing which did not heal, but I was shocked only 2 days of wet feet could do this

YouTube · Post by **Jools** » 31 Jul 2016, 16:55

Yes, trench foot is sometimes reported from British music festivals. I think you have to have it for weeks before it gets serious. A.nyway, thanks for explaining the extreme weather.

Jools

Post by **Silurus** » 01 Aug 2016, 00:41

The identifications of the two catfishes are correct.

YouTube · Post by **bekateen** » 01 Aug 2016, 01:49

@Panaque, with the IDs confirmed, I'll be happy to upload your photos for you, but I don't know your name (for photo credit). Would you please PM me and tell me your full name? (I feel like I should already know it, but I'm drawing a blank).

Do you already have any photos posted on PC CLOGs? If so, your name will be in the system; but if not, I'll have to wait for Jools to add your name to the contributor list.

Cheers, Eric

panaque · Post by **panaque** » 01 Aug 2016, 04:18

Silurus wrote:The identifications of the two catfishes are correct.

Whoo! Thanks very much Silurus, as always.

YouTube · Post by **bekateen** » 01 Aug 2016, 04:54

bekateen wrote:@Panaque, with the IDs confirmed, I'll be happy to upload your photos for you, but I don't know your name (for photo credit). Would you please PM me and tell me your full name? (I feel like I should already know it, but I'm drawing a blank).

Do you already have any photos posted on PC CLOGs? If so, your name will be in the system; but if not, I'll have to wait for Jools to add your name to the contributors.

Done. I figured out how to add your name to the list of contributors on my own (Apologies to Jools... I hope I didn't overstep boundaries).

Cheers, Eric

YouTube · Post by **bekateen** » 01 Aug 2016, 05:02

Does the flooded camp photo qualify as "natural habitat?"

(just kidding)

panaque · Post by **panaque** » 01 Aug 2016, 08:34

@Silurus
I just looked through your paper on (https://www.researchgate.net/publicatio ... _Indonesia) and I wonder now whether my fish were instead. I base this on the shape of the caudal fin (both specimens appear to have distinct lobes - I put this down to damage before) and >50 anal fin rays, if I counted correctly. They also show slight mottling.
In any case, based on above paper the distribution of needs to be updated to include Southern Borneo.

Post by **Silurus** » 01 Aug 2016, 11:57

I counted 50 anal-fin rays on your fish (hence my conclusion), but let me try again....

panaque · Post by **panaque** » 01 Aug 2016, 13:13

"44–45 vs. 49–56" for the anal fin ray count, no? So 50 would make it . Obviously I should have read the paper before I posted the first time!

panaque · Post by **panaque** » 25 Aug 2016, 14:33

Apologies for now posting this sooner but I've been blissfully off-grid for the last three weeks.
Alongside the catfish were some other interesting fish, like this anabantoid Luciocephalus pulcher

and this as yet nameless Nemacheilus loach

Central Kalimantan black waters

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