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Pseudogastromyzon fangi
September 10, 2014
11:42 pm
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olly
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Hello to all

In this video I tried to gather almost all elements of the p.fangi spawning, seen in my tank.

The spawning behavior of P.fangi is complicated, very beautiful, full of amazing moments. I hope you’ll enjoy to observe this fish celebration.

The video consists of episodes from different spawnings.

In the video there are my own interpretations of P.fangi spawning behavior (just the guesses) based on my observations of the small group of these fishes. However, my guesses may be incorrect. You can improve the understanding of P.fangi spawning behavior if you will present here your observations, knowledge, interpretations, guesses, corrections, etc.

September 11, 2014
1:35 am
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Plaamoo
Bellingham, Washington U.S.A.
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Beautiful!! Great job Olly! Thank you for sharing your work!

September 13, 2014
4:35 pm
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mikev
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Indeed, very nice clip -- thank you!

September 29, 2014
3:34 pm
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Matt
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This is really cool Olly, thanks for sharing. What is the general consensus regarding the addition of videos such as this to species profiles?

Cake or death?
September 29, 2014
3:35 pm
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mikev
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Absolutely.

September 29, 2014
6:33 pm
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Byron Hosking
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Yes, agree.

Byron Hosking, BMus, MA Vancouver, BC Canada
September 29, 2014
11:22 pm
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Plaamoo
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mikev said
Absolutely.

 

October 13, 2014
5:08 pm
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Matt
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Ok, this is now on the list for future updates. Thanks chaps.

Cake or death?
November 3, 2014
12:58 am
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olly
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Thanks all!

A little bit more about the P.fangi spawning. For a long time I believed that spawning is only in pairs. However, later P.fangi began to spawn by threes: male and two receptive gravid females. Here is a clip where the moment was caught when
the second female enters into spawning and joins to spawners. I got the impression that the male is ready to spawn with
any number of females, if they raise the dorsal fin.
Interestingly, females may begin to dance with each other by mistake, in response to raised dorsal fin. That is in this clip.


Ridiculous situation may occur. Females reveale the mistake, and they begin to fight. The battle lasts as long as the bored male, who lost females, goes and seeks them. He finds them and leads to dance.

Just a guess about behavioral signalization. When some fishes are fighting, they wave their tails with a large amplitude. They can beat each other with body and tails. But more often they produce the water waves of a large value to the lateral line to intimidate the opponent. During spawning for stimulation of the partner, the body movements of fish are more frequent and with small amplitude. Touching a partner during spawning are important. But characteristics of the water wave (amplitude or/and frequency),
that the lateral line of the partner receives, probably are important too. I think the pattern of the waves, arriving at the lateral
line, may start the behavioral response - aggression or spawning behavior in receptive specimen. This guess may work not for all fishes.
What do you think about this?
Clip with battle of P.fangi. (Stimulation of the partner in the clip of start post.)

November 3, 2014
3:07 am
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Plaamoo
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They are such beautiful fish! I'm really sorry mine didn't make it. Wish you were closer Olly!

November 3, 2014
6:26 am
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mikev
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Great stuff, olly, thank you!

Much more attractive than mine ... and I still have no fry ... probably will move them to a different tank to shake them up.

November 3, 2014
5:54 pm
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mikev
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The photos below are courtesy of Rachel O'Leary who is an importer, breeder, and a great person overall as well in the US:

http://rainbow-fish.org/fishpic/rol_fangi_1.jpgImage Enlarger


http://rainbow-fish.org/fishpic/rol_fangi_2.jpgImage Enlarger

Fangi? Any comments on the dorsal colors you guys want to make? (My "fangi" seem all have colorless dorsals... wonder if this means they are all one sex? )

If Matt wants the photos, Rachel gave her permission.

She also mentioned having variants among fangi (she has a lot), hopefully there will be more photos.

November 6, 2014
10:47 am
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Matt
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Personally I'm unsure what exactly represents P. fangi - I stopped doing Pseudogastromyzon profiles when it became too confusing. :p Will revisit soon and will definitely use these pics - please thank Rachel Mike.

@olly , great videos again definitely agree that the caudal fin movements are involved somehow. Could be the water flow as you say or perhaps some kind of chemical stimuli is also involved and the tail is used to direct this towards the intended recipient?

Cake or death?
November 8, 2014
12:02 am
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olly
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Thanks!

Matt said
Could be the water flow as you say or perhaps some kind of chemical stimuli is also involved and the tail is used to direct this towards the intended recipient?

Interestingly. Of course, you are right, different stimuli are involved jointly.
One more guess. I think that during spawning the skin sensitivity of the P.fangi female is changed. Mechanical stimuli from male (pushing), which other females perceive as an agression and run away, the spawning female in another hormonal status perceive otherwise in positive way. These stimuli together with others direct her spawning behavior.

December 12, 2014
6:12 am
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mikev
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new and slightly air-starved

P1080747.jpgImage Enlarger

December 17, 2014
4:37 am
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mikev
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@ Matt et al: do you have any pseudogastromyzon description papers? Perhaps it is time to read them.

December 26, 2014
10:15 pm
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mikev
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December 27, 2014
2:47 am
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Plaamoo
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Active little buggers! I'm guessing they're not fangi. I'm also guessing you'll have young before long.

December 27, 2014
5:38 am
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mikev
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They are hyperactive when there is food in the tank, other times they behave like normal hillstreams.

Sure hope for the babies one day....

You should get them while you can, Rachel's listing says "FEW" now... they may be not fangi and less attractive than the others but watching them go nuts is something....

January 2, 2015
11:13 am
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Matt
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mikev said
@ Matt et al: do you have any pseudogastromyzon description papers? Perhaps it is time to read them.

This is the problem - no not really.Frown Got the P. tungpeiensis one but it was published in 1949 and most species were described later. The majority were published in Chinese journals that I've been unable to get hold of so far.

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