Sumatran Clown Loaches!
- Thread starter ewurm
- Start date
how big is that clown?irwan;2719918;2719918 said:One of my clown loach. It is from Kalimantan, sent by my friend. I keep 4 big CL.
Sorry that I did not take picture while it swims in aqua considering my tank is vey big that can make it difficult to take proper pic to show its color
Btw, i only used My Nokia camera, dont expect the pic as good as SLR camera
I think that's been Irwan's point all along, Borneo = Kalimantan.
An interesting read produced by the Borneo Research Bulletin;
The fishery of Danau Sentarum
http://www.thefreelibrary.com/_/print/PrintArticle.aspx?id=93827524
The local name for clown loach is used, ulang uli, and according to stats from over 10 yrs ago,
And that was just one location in West Kalimantan where the numbers were being monitored. It makes sense that the loaches frrom Kalimantan have slightly brighter, redder coloration, as the water in these districts is brown water, as well as black water tributaries. The water is high in dissolved tannins and humic acids, which accentuate the reddish/orange colours.
You will see the exact same thing in the native "red" arowana, that are found in these same bodies of water in West Kalimantan. According to a friend of mine who is part owner of an aro farm in Singapore, many farms still groom their juvenile red aros using dissolved tannins in the tank water, as they feel it helps bring out the red at an early age.
An interesting read produced by the Borneo Research Bulletin;
The fishery of Danau Sentarum
http://www.thefreelibrary.com/_/print/PrintArticle.aspx?id=93827524
The local name for clown loach is used, ulang uli, and according to stats from over 10 yrs ago,
And that was just one location in West Kalimantan where the numbers were being monitored. It makes sense that the loaches frrom Kalimantan have slightly brighter, redder coloration, as the water in these districts is brown water, as well as black water tributaries. The water is high in dissolved tannins and humic acids, which accentuate the reddish/orange colours.
You will see the exact same thing in the native "red" arowana, that are found in these same bodies of water in West Kalimantan. According to a friend of mine who is part owner of an aro farm in Singapore, many farms still groom their juvenile red aros using dissolved tannins in the tank water, as they feel it helps bring out the red at an early age.
My point is Borneo = kalimantan, you dont have to separate between borneo speciment and kalimantan speciment. They are all the same. I agree that kalimantan water which is blackwater (Ph can reach 6, 5 even 4) bring benefit to its native fish coloration
irwan;2732076; said:
The only reason I would differentiate between the two is that the "kalimantan" specimen is supposed to have clear orange caudal peduncle fins. This may be completely false. That is the only distinguishing characteristic that the articles list, but it may very well be false. I wish some scientific sampling in the region could be done, but there just isn't enough interest amongst the scientific community.
RD.;2731289; said:I think that's been Irwan's point all along, Borneo = Kalimantan.
An interesting read produced by the Borneo Research Bulletin;
The fishery of Danau Sentarum
http://www.thefreelibrary.com/_/print/PrintArticle.aspx?id=93827524
The local name for clown loach is used, ulang uli, and according to stats from over 10 yrs ago,
And that was just one location in West Kalimantan where the numbers were being monitored. It makes sense that the loaches frrom Kalimantan have slightly brighter, redder coloration, as the water in these districts is brown water, as well as black water tributaries. The water is high in dissolved tannins and humic acids, which accentuate the reddish/orange colours.
You will see the exact same thing in the native "red" arowana, that are found in these same bodies of water in West Kalimantan. According to a friend of mine who is part owner of an aro farm in Singapore, many farms still groom their juvenile red aros using dissolved tannins in the tank water, as they feel it helps bring out the red at an early age.
That may be a good experiment. It might be beneficial to keep young fish in blackwater conditions as they are reared.
ewurm - is this the article that you are referring to?
http://www.loaches.com/articles/clown-loach-coloration-marking-variations
If so, I suspect that Martin's source article (I'll contact him to confirm) is the following article.
http://www.science.nus.edu.sg/~webdbs/biodiversitii/bio/aquarium_more.html
Where they state ..........
Note that in this article from the NUS (National University of Singapore) Borneo & Kalimantan are used to describe the same geographical location. That article also states that clown loaches have been heavily exploited in both regions (Sumatra & Kalimantan) for over 20 years. (the article was originally published in 1998) If that is true, then obviously clown loaches from Kalimantan have indeed been exported in large numbers for the past 30+ years. While at the time of this article clowns from "Central" Kalimantan may have not been exported in massive numbers, in West Kalimantan they most certainly had been.
With regards to color differences between Sumatra & Kalimantan in this article they state:
No mention of "clear orange caudal peduncle fins", only that Kalimantan clowns have more intense reddish coloration, and Sumatran clowns generally have a silvery sheen over the body.
http://www.loaches.com/articles/clown-loach-coloration-marking-variations
If so, I suspect that Martin's source article (I'll contact him to confirm) is the following article.
http://www.science.nus.edu.sg/~webdbs/biodiversitii/bio/aquarium_more.html
Where they state ..........
Note that in this article from the NUS (National University of Singapore) Borneo & Kalimantan are used to describe the same geographical location. That article also states that clown loaches have been heavily exploited in both regions (Sumatra & Kalimantan) for over 20 years. (the article was originally published in 1998) If that is true, then obviously clown loaches from Kalimantan have indeed been exported in large numbers for the past 30+ years. While at the time of this article clowns from "Central" Kalimantan may have not been exported in massive numbers, in West Kalimantan they most certainly had been.
With regards to color differences between Sumatra & Kalimantan in this article they state:
No mention of "clear orange caudal peduncle fins", only that Kalimantan clowns have more intense reddish coloration, and Sumatran clowns generally have a silvery sheen over the body.
While we're discussing Sumatran vs. Kalimantan clown loaches I thought I would toss this out there for general interest. The scientific community may have more interest in this species than what we realized.
http://www.senta.its.ac.id/index.php?option=com_content&task=view&id=79&Itemid=52
GENETIC DIFFERENTIATION AMONG POPULATIONS OF CHROMOBOTIA MACRACANTHUS BLEEKER FROM SUMATRA AND KALIMANTAN BASED ON SEQUENCING GENE OF CYTOCHROME B AND RAG2
Kafi Hidonis
Abstract
The research on genetic differentiation among populations of Chromobotia macracanthus Bleeker from Sumatra and Kalimantan based on sequencing gene of mtDNA Cytochrome b and nucleus DNA RAG2 has been done. The objectives of the study are to obtain the representation of genetic differentiation among population of clown loach fishes or botia (Chromobotia macracanthus) from Sumatra and Kalimantan and to estimate the time divergence of both population group of botia.
Sample of botia population were taken from 3 rivers in Sumatra namely Batanghari, Musi, and Tulang Bawang and one river from Kalimantan namely Kapuas. The genetic analysis is based on the sequencing of mtDNA Cytochrome b and nucleus DNA RAG2. The parameters observed are: nucleotide diversity, genetic distance, and neighbor-joining tree. The results showed that the highest nucleotide diversity is population of Musi, while the two populations namely Tulang Bawang (Sumatra) and Kapuas (Kalimantan) considered as the lowest genetic diversity especially based on Nucleus DNA RAG2 sequencing.
According to result of neighbor-joining tree analysis, the population of botia were classified into two group namely group of Sumatra and group of Kalimantan. The estimation of time divergence among group of population of Sumatra and Kalimantan based on mtDNA Cytochrome b is about 9,25-9,46 million years (Miocene era). The big genetic differences between population group of Sumatra and Kalimantan suggest that the effort of restocking of botia from Sumatra into Kalimantan has to be done carefully, because it may disturb the original population of botia.
http://www.senta.its.ac.id/index.php?option=com_content&task=view&id=79&Itemid=52
GENETIC DIFFERENTIATION AMONG POPULATIONS OF CHROMOBOTIA MACRACANTHUS BLEEKER FROM SUMATRA AND KALIMANTAN BASED ON SEQUENCING GENE OF CYTOCHROME B AND RAG2
Kafi Hidonis
Abstract
The research on genetic differentiation among populations of Chromobotia macracanthus Bleeker from Sumatra and Kalimantan based on sequencing gene of mtDNA Cytochrome b and nucleus DNA RAG2 has been done. The objectives of the study are to obtain the representation of genetic differentiation among population of clown loach fishes or botia (Chromobotia macracanthus) from Sumatra and Kalimantan and to estimate the time divergence of both population group of botia.
Sample of botia population were taken from 3 rivers in Sumatra namely Batanghari, Musi, and Tulang Bawang and one river from Kalimantan namely Kapuas. The genetic analysis is based on the sequencing of mtDNA Cytochrome b and nucleus DNA RAG2. The parameters observed are: nucleotide diversity, genetic distance, and neighbor-joining tree. The results showed that the highest nucleotide diversity is population of Musi, while the two populations namely Tulang Bawang (Sumatra) and Kapuas (Kalimantan) considered as the lowest genetic diversity especially based on Nucleus DNA RAG2 sequencing.
According to result of neighbor-joining tree analysis, the population of botia were classified into two group namely group of Sumatra and group of Kalimantan. The estimation of time divergence among group of population of Sumatra and Kalimantan based on mtDNA Cytochrome b is about 9,25-9,46 million years (Miocene era). The big genetic differences between population group of Sumatra and Kalimantan suggest that the effort of restocking of botia from Sumatra into Kalimantan has to be done carefully, because it may disturb the original population of botia.
