Ajime-dojo (Niwaella delicata)
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Ajime-dojo (Niwaella delicata)
There was the opportunity when I traveled to the habitat of Ajime-dojo(Niwaella delicata) last week.
Because I succeeded in underwater photography of Ajime-dojo(Niwaella delicata), I show it.
I had a hard time to fix a camera for a fast flowing stream.
They are Japanese endemic species to live in the mountain stream.
They are glazing of the adhesion alga of the rock surface.
The movie in the wild stream is here.
http://www.youtube.com/watch?v=EBOB2XaDsRE
It is two of them which it is breeding now which it introduced a movie to before.
http://www.youtube.com/watch?v=zoZzFpYGJYk
Niwaella delicata
Other fish living with Niwaella delicata.
Rinogobius flumineus
Cottus pollux
Oncorhynchus masou ishikawae
previous post
http://forums.loaches.com/viewtopic.php ... a+delicata
Because I succeeded in underwater photography of Ajime-dojo(Niwaella delicata), I show it.
I had a hard time to fix a camera for a fast flowing stream.
They are Japanese endemic species to live in the mountain stream.
They are glazing of the adhesion alga of the rock surface.
The movie in the wild stream is here.
http://www.youtube.com/watch?v=EBOB2XaDsRE
It is two of them which it is breeding now which it introduced a movie to before.
http://www.youtube.com/watch?v=zoZzFpYGJYk
Niwaella delicata
Other fish living with Niwaella delicata.
Rinogobius flumineus
Cottus pollux
Oncorhynchus masou ishikawae
previous post
http://forums.loaches.com/viewtopic.php ... a+delicata
Last edited by odyssey on Sat Jul 11, 2009 9:23 pm, edited 1 time in total.
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Hi everyone.
Unfortunately the water temperature does not measure it.
However, probably it will be around 15 degrees C because it was considerably cold.
There are water temperature / the water data of the lower basin more than 100km.
As for the water temperature, the neighborhood of 19 degrees C, the pH were 7 in a lower basin.
http://www1.river.go.jp/cgi/DspWquaData ... KAWABOU=NO
Water of Japanese this neighborhood is the standard water.
It is quite soft water of pH 7.
Oncorhynchus masou ishikawae is called "Amago".
"Amago" is a meaning called the rainy child.
An orange small spot is special.
It is a collection of images of "Amago".
http://images.google.co.jp/images?q=%E3 ... e&resnum=1
Unfortunately the water temperature does not measure it.
However, probably it will be around 15 degrees C because it was considerably cold.
There are water temperature / the water data of the lower basin more than 100km.
As for the water temperature, the neighborhood of 19 degrees C, the pH were 7 in a lower basin.
http://www1.river.go.jp/cgi/DspWquaData ... KAWABOU=NO
Water of Japanese this neighborhood is the standard water.
It is quite soft water of pH 7.
Oncorhynchus masou ishikawae is called "Amago".
"Amago" is a meaning called the rainy child.
An orange small spot is special.
It is a collection of images of "Amago".
http://images.google.co.jp/images?q=%E3 ... e&resnum=1
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
- Jim Powers
- Posts: 5208
- Joined: Wed Dec 28, 2005 6:15 pm
- Location: Bloomington, Indiana
The "Amago" is one beautiful salmonid!
Its interesting that is retains the par marks into adulthood.
Most members of the genus Oncorhynchus such as the rainbow trout (Oncorhynchus mykiss) lose the marks as they mature.
Although I think a few subspecies of the rainbow trout do keep them to some degree.
Does the "Amago" spawn in fresh water or salt or both?
Its interesting that is retains the par marks into adulthood.
Most members of the genus Oncorhynchus such as the rainbow trout (Oncorhynchus mykiss) lose the marks as they mature.
Although I think a few subspecies of the rainbow trout do keep them to some degree.
Does the "Amago" spawn in fresh water or salt or both?
- Gary Stanton
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All salmonids spawn in fresh water. Great looking adults is right.Jim Powers wrote:The "Amago" is one beautiful salmonid!
Its interesting that is retains the par marks into adulthood.
Most members of the genus Oncorhynchus such as the rainbow trout (Oncorhynchus mykiss) lose the marks as they mature.
Although I think a few subspecies of the rainbow trout do keep them to some degree.
Does the "Amago" spawn in fresh water or salt or both?
"Beware of the fish people, they are the true enemy."
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
- Jim Powers
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- Gary Stanton
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Good question. By their look I would guess they are fresh water. I'm curious now. After investigating I would be wrong. They migrate to the ocean. Typical salmon.Jim Powers wrote:Actually what I meant to say was "do they LIVE in fresh water, salt water or both?".Oncorhynchus masou ishikawae
But, thanks for the clarification, Gary.
"Beware of the fish people, they are the true enemy."
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
- Jim Powers
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Well, after what I found, you are right...and wrong.
I guess there are two forms of this fish, one sea-run and one fresh water. Just like rainbow trout/steelhead in the same genus.
I guess there are two forms of this fish, one sea-run and one fresh water. Just like rainbow trout/steelhead in the same genus.
Salmo masou Brevoort, 1856, Japan. There are two subspecies: one, Oncorhynchus masou masou, spawns in the sea; the other, restricted to freshwater, is yamame, or Oncorhynchus masou ishikawae.
- Gary Stanton
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Oncorhynchus masou masou is the one I got the info from, some consider it as the only species. I don't think it spawns in the sea though, it returns to the sea. Spawns in streams.Jim Powers wrote:Well, after what I found, you are right...and wrong.
I guess there are two forms of this fish, one sea-run and one fresh water. Just like rainbow trout/steelhead in the same genus.Salmo masou Brevoort, 1856, Japan. There are two subspecies: one, Oncorhynchus masou masou, spawns in the sea; the other, restricted to freshwater, is yamame, or Oncorhynchus masou ishikawae.
I should have stuck with my original guess, huh?
"Beware of the fish people, they are the true enemy."
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
-- Frank Zappa, speech to a pro-choice rally in Los Angeles around 1989-90
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