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Image 1a and 1b, is a Serrasalmus
species collected from the Upper Amazon of Peru. I have included a
new photo since its growth in this outdoor (1b) shot. This gives the
viewer a better understanding of its brilliant coloration. Both species
1 & 2 present sub adults of an
unknown species resembling a compressus-group member. Young ones have a
vertical elongated spots on the flank above the lateral line. The
pattern deepens with combo small bars and spots as the fish matures.
The eye is red, but not deep. The fish in the aquarium appears to grow
rapidly, unlike S. rhombeus. The species (since captivity) has
become similar in appearance to Serrasalmus compressus a widespread species,
usually found in the same locality as S. rhombeus. No decision has been made to move this photo to the
proper bionomen until more research is completed.
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Image 2, is a Serrasalmus
species collected by David M. Schleser. Similar forms have been
collected near the town of Yanashi, Peru. According to Dave,
these species is very compressed and has a distinctive black
caudal terminal band very prominent from other species. My
impression is the fish may be S. compressus.
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Image 3a & 3b, is an unknown Pristobrycon-type collected and
photographed by David M. Schleser & George Fear. According Dave,
this fish was collected at the Tachshacurary river (a blackwater
stream) just upstream from the village of Tacshacuraray which is
located where the Tachsahcuraray empties into the Napo, Peru. May be Pristobrycon calmoni a little known species found in two localities
but not Peru where these specimens were collected.
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Image 4. Unknown
species collected by George Fear, appears similar to S. eigenmanni or more likely S. aureus.
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Image 5. Unknown
species. Photograph provided by Ron Nielson. Locality data on photo.
May be specimen erroneously packed with export. Seems to be similar to S. maculatus.
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Image 6. Undescribed
species. Rio Amazonas, near mouth of Rio Orosa, seems similar to image
2. Probably S. compressus.
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Image 7. Another
difficult species to identify. David Schleser thought it might be a
member of the S. eigenmanni group or S. humeralis. The body is a bright
silver, with small spots and elongated bars with a dark caudal fin
band. Personally, I think it may be a juvenile S. compressus.
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Image 8A and 8B was collected in
rio Nanay, Peru (1988) by David M. Schleser. The species resembles P. striolatus a species not
recorded in Peru at the present time. This may make this species a
first! M. Jégu identified a similar species (Brazil) but called it P. calmoni (see image and
accompanying diagram under that species name). Some years ago, David
had sent me a slide of this fish and I was of the opinion it might have
been a human released specimen as he did not catch anymore since then.
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Image 9. This fish was
collected from the rio Negro. It remains undescribed and may be either S.
serrulatus or S. eigenmanni.
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Image 10a. This fish
was collected in Venezuela. Its a young specimen that somewhat
resembles S. eigenmanni. However, I remain uncertain it is that
species or one that needs to be described. Image 10b. is from the rio Negro
and may represent an adult form of 10a.
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Image 11a & 11b. These two fish
show adult and juvenile form. The smaller one resembling S. hollandi
and the larger adult a Serrulatus-Group member. Both fish collected
from San Martin river, Bolivia.
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Image 12.
Collected in Bolivia. Resembles a compressus-group member but not as
deep-bodied.
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Image 13 & 14. According to Dave
Schleser, locale data is Padre Cocha, a town on Rio Nanay (Blackwater)
just a bit upriver from Iquitos where it joins whitewater Amazon. Water
here is a mix of both types due to Amazon flooding back into the rio
Nanay.
