Tinfoil vs. red-tail tinfoil ?!

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bluegryffin

Feeder Fish
MFK Member
Jan 25, 2008
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fort collins, colorado
I was wondering if anyone knows a good way to tell apart tinfoil barbs (barbonymus schwanenfeldii) from red tailed tinfoil barbs (barbonynmus altus) and if you know a reliable source to get some RED TAILs. Most websites I have seen say that the red tails only grow to 8" or so, instead of 15"
The only way to tell them apart that I have seen is that the regular TFBs
(shwanenfeldii) have black lines on the edges of their caudal (tail) fins. The red-tails suppossedly do not. Can anyone confirm this, or get me some better info? And where to get some "real" red tailed TFBs that I know won't grow to 15"? Thank you SOOOOOO much in advance. :D
 
The only way probably is to read the scientific name when buying, altus or schwanenfeldii
 
Barbonymus schwanenfeldii - Tinfoil barb
http://www.fishbase.org/Summary/SpeciesSummary.php?id=4765
Family: Cyprinidae (Minnows or carps) picture (Basch_u1.jpg) by Baird, I.G.


Point map |
Order: Cypriniformes (carps) Class: Actinopterygii (ray-finned fishes) FishBase name: Tinfoil barbMax. size: 35.0 cm SL (male/unsexed; Ref. 30857) Environment: benthopelagic; potamodromous (Ref. 51243); freshwater; pH range: 6.5 – 7.0; dH range: 10 Climate: tropical; 22 – 25°C; 16°N - 4°SImportance: fisheries: subsistence fisheries; aquaculture: commercial; aquarium: commercial; bait: occasionally; price category: not marketed/unknown Resilience: High, minimum population doubling time less than 15 months(Assuming tm=1; Fec=8,000-16,000) Vulnerability: Moderate to high vulnerability (47.12), based on Lmax and K (Ref. 59153) Distribution:
Gazetteer Asia: Mekong and Chao Phraya basins, Malay Peninsula, Sumatra and Borneo. Morphology: Dorsal spines (total): 3 - 3; Dorsal soft rays (total): 8 - 8; Anal spines: 3; Anal soft rays: 5. Distinguished from other species of the genus in having a red dorsal fin with a black blotch at the tip, red pectoral, pelvic and anal fins, red caudal fin with white margin and a black submarginal stripe along each lobe, and 8 scale rows between dorsal-fin origin and lateral line (Ref. 27732). Large individuals silvery or golden yellow in life with its dorsal fin red and caudal fin orange or blood-red (Ref. 2091). Biology: Found in rivers, streams, canals and ditches (Ref. 12693). Occurs in medium to large-sized rivers and enters flooded fields (Ref. 12975). In east Kalimantan, Indonesia a temperature range of 20.4-33.7°C was recorded for this species (Ref. 6129). Largely herbivorous, consuming aquatic macrophytes and submerged land plants, as well as filamentous algae and occasionally insects (Ref. 12693). Also feeds on small fishes (Ref. 12693), worms and crustaceans (Ref. 7020). Usually marketed fresh (Ref. 12693).

Barbonymus altus - Red tailed tinfoil
http://www.fishbase.org/Summary/SpeciesSummary.php?id=8171
Family: Cyprinidae (Minnows or carps) picture (Baalt_u0.jpg) by Warren, T.


Point map |
Order: Cypriniformes (carps) Class: Actinopterygii (ray-finned fishes) FishBase name: Red tailed tinfoilMax. size: 20.0 cm SL (male/unsexed; Ref. 30857) Environment: benthopelagic; potamodromous (Ref. 51243); freshwater Climate: tropical; 22 – 27°CImportance: fisheries: minor commercial; aquaculture: commercial; aquarium: commercial; price category: not marketed/unknown Resilience: Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)Vulnerability: Low to moderate vulnerability (33.45), based on Lmax and K (Ref. 59153) Distribution:
Gazetteer Asia: Mekong and Chao Phraya basins (Ref. 27732). Recorded from the Maeklong, Peninsular and Southeast Thailand river systems (Ref. 26336). Morphology: Broad red distal margin with no black submarginal stripe along each lobe of the caudal fin; red pelvic and anal fins; a black distal blotch on the dorsal fin; the body depth 1.8-2.2 times in standard length (Ref. 27732). Biology: Occurs at midwater depths in large and medium-sized rivers and floodplains. Feeds on various plant and animal matter. Commonly found near villages where it feeds on organic detritus disposed of by humans (Ref. 12693). Reported to be occasionally poisonous, causing vomiting, due the fruits it eats (Ref. 12369). Colonizes inundated forests and adults migrate back to the river in October. Young of the year follow thereafter when the water levels recede. Large-sized fish are marketed fresh while smaller ones are used to make prahoc and nuoc mam (Ref. 12693). Popular fish in the aquarium trade where it is sold under the name of "tinfoil barb" (Ref. 12693). Captured from the wild for the ornamental fish trade in Thailand (Ref. 6459). Cultured in floating cages in Viet Nam (Ref. 12693).
 
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