Collecting Pedro Miguel (catfish)

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Isla Taboga Panama via Milwaukee
It is still the dry season here in Panama, but the rains are soon to be approaching, and when they hit, the rivers become ragging torrents, difficult to collect in, with a cast net.
Rio Pedro Miguel was the 5th stop in my attempts to collect endemic cichlids, since my first ill fated attempt at Lago Mira Flores in late Dec.
It is a narrow river that feeds the Panama Canal flowing down from the central highlands.
My first stop was an area just north of the canal pipeline.
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It looks deceptively shallow, but there was a lot of sunken debris and logs, so the net kept getting caught on stuff, I slid down the embankment, in up to my neck trying to dislodge the net after the first cast.
I could see lots of Tetras, and large mullet there, but a better logistical casting spot was needed, so (Danny my driver and I) needed to move to a less cluttered spot up river,
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The river was much shallower here, the banks more accessible, so I had enough space to get a good swing, across to deeper areas, on the opposite side of the stream, and into the shadows.
Beside the tetras, the net was pulling up catfish, and one Guavina (goby).
The tetras did not take well to being in a bucket, and started floundering within a hour even though the battery operated pump was running well, and I was constantly switching out river water.
As soon as I noticed any tetras listing they were thrown back.
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After collecting, we had at least another hour long drive to the ferry dock, an hour wait forthe ferry, a 10 mile bit of Pacific to cross, and a 20 minute walk to my home, and tanks in Taboga .
In the end only 3 Tetras survived the journey, most of the tough catfish, and goby did to.
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The Goby is very secretive, and hard to get a shot of, the tank is quite stirred up from the ruckus.
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As a matter of course, I always take water parameter readings with an API strip wherever I collect, to get a ballpark idea whether the fish will work in my tanks water. or not.
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Looks like undetectable nitrite, and nitrate, a pH between 7.6 and 7.8, KH between 80 and 120, and a GH somewhere in the neighborhood of 100, to 120.
This was yesterday, overnight a couple catfish have kicked the bucket, injured from being to seriously getting tangled up in the net, and their extraction from it.
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Today will be used to try to determine species using the taxonomic key in my field guide, Peces de las Aguas Continentals de Costa Rica, by William Bussing.
 
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From the info in the taxonomic key (such as fin size, distribution maps, length of barbels), most of the cats look like Pimelodella chagresi.
They have 3 very sharp spines, that easily draw blood, and entangle them in nets, so very difficult to remove.
The one larger, and odd catfish out may be from the genus Rhamdia, maybe R. guatamalensus.
Rio Pedro Miguel is part of the Chagres river system, here the catfish are called Barbudos by the locals.
Again the Tetras appear to be from the genus Bryconamericas, although maybe a separate species from those I caught in, and near Lago Bayano, a couple weeks back. Locals call them sardinas.
The goby is a bit secretive, and a juvie, so hard to get a look a so far, the mouth shape suggests it may be from the genus Gobiomorus.
 
So cool that you got a rhamida let alone few pims.

I dont think I have ever seen a Pimelodella chagresi for sale around here! Adding it to one of my dream cats to keep.
 
An observation about (what I believe to be), the nocturnal habits of the Pimlodella cats.
They seem to be nocturnal feeder, hiding most of the day and getting active at night.
Here is a shot from the first day the tetras were put in the tank, Tuesday
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Today (Thursday) the tetras looked like this
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I did not see how this occurred, because it happened in the dark, but they are the only other fish in the tank, other than a small goby.
Its my belief, during the days the tetras are too aware and quick for this to happen.
But at night when they are resting, seems reasonable that the cats just waltz up and strip them of scales, and munch on fins.
 
By early this morning (Fri) of the 3, the only remaining IMG_0450.jpegtetra left alive was in pretty bad shape
IMG_0454.jpegAnother tetra carcass was found in a corner
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The 3rd disappeared completely.
This may account for why these cats have not been a popular aquarium staple.
 
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Just for reference, the tank is a 6ft 29" tall 180 gal, probably too small for the cat tetra combination..
The river the cats and tetras were caught in was about 20 feet wide at the point they were caught and varied from about knee deep, to maybe 4 ft deep in the opposite shore, judging by how the cast net disappeared, below the surface.
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In another part of the river, where tetras were clearly visible, after snagging my net on a log, I slid in, the water was up to my neck
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I'm starting to wonder if while together in the bucket, that the cats were already attacking the tetras, and why so many almost immediately floundered.
 
Was finally able to get a better shot of the Goby today.
I have a (what I consider lengthy learning curve), in taking photos.
It's not the most animated of fish, and.....
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after not seeing it a while, I was worried it met the same fate as the tetras, but it looks no worse for the wear.
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