Natural River fishes in Japanese Izu Peninsula

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Natural River fishes in Japanese Izu Peninsula

Postby odyssey » Sun Oct 18, 2009 8:01 am

Hi all !
I show pictures because I took a photo underwater in the river of Japanese Izu Peninsula. last month.
Because the Kuroshio Current flows through the sea near the shore, the district is comparatively warm.
It is uploaded video clip to YouYube as always.
http://www.youtube.com/watch?v=r-iRT8Qfxe0

The sweetfish which grazes algae. Plecoglossus altivelis altivelis
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Japanese fluvial sculpin. Cottus pollux.
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Rhinogobius so CO
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Tridentiger brevispinis and Sicyopterus japonicus.
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Rhinogobius and Sicyopterus japonicus.
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Sicyopterus japonicus.
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Amur Minnow. Phoxinus logowskii steindachneri
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Japanese mitten crab. Eriocheir japonica
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Freshwater Prawn. Macrobrachium sp ?
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I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Postby plaalye » Sun Oct 18, 2009 11:03 am

Another treat, thanks odyssey! That little prawn looked fearless. Have you tested the water parameters where the sicyopterus live?
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Postby odyssey » Sat Oct 24, 2009 7:44 am

Hi plaalye!
The small prawn would think one's reflected image reflected in the lens surface to be a rival.

The water temperature was about 20 degrees Celsius.
I do not do the water test, but this river has a big hot spring upstream.
An ingredient of the hot spring may be what is advantageous to the breeding of the alga.

Because both eat an adhesion alga, sicyopterus goby and the sweetfish are rivals.
I heard that both did a territorial dispute frequently, but a fight was not seen at all in this river.

http://en.wikipedia.org/wiki/Izu_Peninsula
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Postby plaalye » Sat Oct 24, 2009 1:28 pm

Thanks odyssey. 20c is cool! Would like to know the PH/KH/GH etc. I used to spend lots of time in hot springs in Montana and the water seemed heavy with elements, though I've never tested for what? Sulphur is one I think. Looks like there is plenty of algae for all there.
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Postby tyrano34 » Mon Nov 02, 2009 8:34 pm

Thank you for this wonderful story, and it true that fish your cat invaded your rivers?

I saw a video japonaise on the catfish with a needle that eat your many small fish.

Your goby fish are in danger?
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Postby Matt » Wed Nov 04, 2009 12:48 pm

Stunning as ever Odyssey, thanks!
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Postby MTS » Wed Nov 04, 2009 7:32 pm

Beautiful! Thank you for sharing.
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Postby odyssey » Tue Nov 17, 2009 12:25 pm

Hi all !
Everybody enjoys it, and I am glad.
tyrano34 wrote:Your goby fish are in danger?

I think that the menace of Catfish does not matter much.
The worst foreign fish in Japan is a large-mouth bass.
However, as well as Japan, a menace of gobies is natural destruction by the human being.
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Postby tyrano34 » Tue Nov 17, 2009 12:59 pm

Thank you for answers.

I tried to locate the rivers on a map but without success.

could you give us information on the fishing grounds.

Would you parameters of the water?
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Postby odyssey » Wed Nov 18, 2009 12:31 pm

Hi tyrano34!
tyrano34 wrote:could you give us information on the fishing grounds.
Would you parameters of the water?

I photographed the pictures mentioned above in the plural rivers of Izu Peninsula.

You can confirm a lot of rivers of Izu Peninsula when you lose expansion.
http://maps.google.com/maps/mm?hl=en&ie ... 436218&z=9

I do not know parameters of the water.
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Postby tyrano34 » Wed Nov 18, 2009 2:02 pm

Thank you for the card I knew or found the Izu peninsula, which I find is the name of the river or you're sunk.

Thanks for your videos on youtube, I could explore the Japanese Internet and I saw that a word that often return to the subject of gobies.

ナンヨウボウズハゼ

ボウズハゼ: that word mean, if you please

http://www.kazkian.com/z/manboon/2007/08/post_522.html
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Postby odyssey » Thu Nov 19, 2009 11:57 am

"ボウズハゼ" is Bouzu / Haze.
Bouzu means a Buddhist priest, and Haze means a goby.
The origin of the name is a meaning called the goby of the shaven head or a meaning called the goby of the vegetarianism.
"ボウズハゼ" means Sicyoputerus concretely.

"ナンヨウボウズハゼ"is Nanyou/Bouzu/Haze.
"Nanyou" means South Seas.
"ナンヨウボウズハゼ" is a meaning called Sicyoputerus of the South Seas.
However, actually it is Stiphodon percnopterygionus or the Stiphodon genus as a fish class.
I am not used to English. Therefore,It is likely to sometimes misunderstand it.
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Postby ch.koenig » Sun May 23, 2010 4:16 pm

hi odyssey
do you know this rhinogobius? is it sp OR from Japan?

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cheers Charles
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Postby Graeme Robson » Tue May 25, 2010 2:11 pm

Gorgeous!!! 8)
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Postby ch.koenig » Tue May 25, 2010 3:53 pm

yes Graeme
an interesting specimen of 7 cm, female with 5 cm (may be I've two with different colours
on a german website - with breeding infos - they are identified (with doubts) as r leavelli. I doubt it. as M. Kottelat doesn't identify rhinogobius by pics I'm stuck. more pics are on seriouslyfish.com.
seems to be a freshwater species without pelagic larves, but it seems to be hard to make them survive. I found two other pics on the web, one with the id as r sp OR (from Japan) which is certainly wrong. no way to fix the origin. south of china is the most probable as the first female came in with pseudagastromyzon cf cheni=p fasciatus, peristictus, myersi mix.
cheers Charles
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