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A few tiny larvae
October 8, 2012
5:33 pm
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Ferrika
Brunswick / Germany
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Right now I have some of the tiny goby larvae in breeding. First, one of my Brachygobius kindly not eaten the eggs again, so I had to raise this important :-)

Then suddenly a few hundred larvae swam in R. leavelli pool. Which of course I could not just let perish * g *

A day later, I caught my adult R. formosanus, because I have to leave to Switzerland. Of course, they also had a clutch of about 3000 eggs left * ahem *. Because I had not even raised these gobies, so I had no other choice ..... is not it?

Meanwhile, everyone is already above the critical point. The R. leavelli in the F2 eat since the ninth day Artemia nauplii, where the former larvae have always done so with only 21 days.

The Brachygobius doriae do as always no problems. With 5 days they eat already Artemia nauplii, now, with 16 days, they have to go to the ground :-)

The R. formosanus have made some initial problems. Meanwhile, about 150 larvae still remain, which are stable and well developed. Mostly one or the other already tried to eat brine shrimp.

I am glad that the raising even in the R. formosanus goes smoothly.

 

R. formosanus, day 12

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R. leavelli, day 13

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B. doriae, day 16

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greets Jutta
October 8, 2012
6:30 pm
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Graham Ramsay
Blairgowrie - UK
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Great job - and nice pictures.

October 9, 2012
12:56 am
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Plaamoo
Bellingham, Washington U.S.A.
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That's a lot of gobies! well done Jutta!!

October 9, 2012
1:00 am
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mikev
NYC
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Joining the crowd : well done!

What are you feeding the little ones? Microworms? Paramecium?

October 9, 2012
4:43 am
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Ferrika
Brunswick / Germany
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mikev said
What are you feeding the little ones? Microworms? Paramecium?

This question is very good, Mike. Please do not be angry, but your guess is typical for freshwater aquarists :-)

No, no micro worms or paramecium. Both are first too big and 2nd solve these food animals also not feeding stimulus in the larvae. Except of Brachygobius that may already eat paramecia from 1st Day but are fed with me also with Brachionus.

The Rhinogobius eat rotifers, Brachionus plicatilis. Although there are salt water Brachionus, makes no big problems. The water in the breeding tank of larvae will be salted with 2 g / l and so can the Brachionus plicatilis survive.

To have this amount of larvae survive, they have to constantly be in food. This can be achieved good with Brachionus, but we must also make several times a day to ensure that the Brachionus be filled, so this feed. This is done with Selco S. presso. The Brachionus even be grown in salt water with 14 g / l and fed with Selco S. parkle.

Selco S. parkle is a dried and specially prepared alga, shaken with water containing very fine particles and can be easily absorbed by the Brachionus.

Selco S. Presso is a paste of processed fish oils (probably salmon oil), emulsified with warm water. It is rich in HUFA (Highly Unsatturated Fatty Acid). Brachionus have very little nutritional value and are with the S. presso upgraded so that the larvae in order to get sufficient nutrients.

greets Jutta
October 9, 2012
9:35 am
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Matt
Málaga, Spain
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Very very cool Jutta, congrats on all the new fry.Laugh Are the supplements you use to feed the Brachionus similar to any of these?

Cake or death?
October 9, 2012
11:29 am
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Ferrika
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I'm not sure if I understand correctly you, Matt.
The feed supplement can be applied for any kind of Brachionus, but also for Artemia nauplii and Daphnia. However, it is NOT a food that should not be confused. It's just an accumulation!
If the question was on larvae: I also my Artemia nauplii daily richer with Selco S. presso and vitamins (C + B complex). So for me all young fish are fed. The success is the fact that the young fish grow faster, healthier and earlier mature. But this is NOT a boost, but just a fish-based diet.

 

Oh by the way, Mike, I forgot to mention that all the larvae, with about 2.5 - 3 mm slip :-) The R. leavelli and R. formosanus are now about 5 mm long, the Brachygobius about 6 mm.

greets Jutta
October 9, 2012
2:39 pm
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mikev
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Please do not be angry, but your guess is typical for freshwater aquarists

Not angry, only curious, one day I may get them too.... Thank you!

October 10, 2012
8:02 am
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Matt
Málaga, Spain
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Hi Jutta, maybe you missed the link at the end of my post? I was asking if the products we use are similar to those in the link. :)

Cake or death?
October 10, 2012
8:46 am
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Ferrika
Brunswick / Germany
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Good morning, Matt (I must have been asleep when I read your post *g*)

The "Dry Invert Feed" is probably the same as "Selco S. parkle". The "New HUFA enrichment" could be similar to the "S. Selco presso".

greets Jutta
October 10, 2012
7:55 pm
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Graham Ramsay
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Matt said
Hi Jutta, maybe you missed the link at the end of my post? I was asking if the products we use are similar to those in the link. :)

To be fair it's easy to miss.

October 11, 2012
8:19 am
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Matt
Málaga, Spain
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Yeah I know Graham, we need to do something about the colour of links on the forum. :-/

Thanks for the info Jutta, and sorry for the confusion!

Cake or death?
October 11, 2012
9:31 pm
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BallAquatics
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Matt said
Yeah I know Graham, we need to do something about the colour of links on the forum. :-/

If you modify the CSS to put the underline back, links are much easier to notice in my opinion.

Dennis

October 19, 2012
8:34 am
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Bully
South Wales
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Ferrika said

Selco S. Presso is a paste of processed fish oils (probably salmon oil), emulsified with warm water. It is rich in HUFA (Highly Unsatturated Fatty Acid). Brachionus have very little nutritional value and are with the S. presso upgraded so that the larvae in order to get sufficient nutrients.

 

Hello Jutta,

 

May I ask why you choose to enrich with Selco instead of live phytoplankton? 

October 19, 2012
8:39 am
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Ferrika
Brunswick / Germany
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Because phytoplankton is a very uncertain thing. It can be very sudden collapse and leave you suddenly there without food.

Added to this is that there are different types of phytoplankton, which in turn contain different nutrients and compounds. I have at home not the way to determine this, and so it is almost a game of roulette which nutrients are fed to the fry.

By Selco I have constant nutrients that are always available and so the survey, with which the larvae are fed.

greets Jutta
January 30, 2013
7:09 pm
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Plaamoo
Bellingham, Washington U.S.A.
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I know there is an appropriate r. duospilus thread but I couldn't find it. My matriarch has laid eggs on the front glass. Is this unusual Jutta?

 

http://i192.photobucket.com/albums/z229/bigsky_photos/DSC_4731_zps7ab85752.jpgImage Enlarger

January 30, 2013
11:15 pm
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Rüdiger
Brunswick / Germany
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Great photo Jim! ;-)

R.

If you must insist on living in a box ...... at least do your thinking outside.
January 30, 2013
11:54 pm
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Ferrika
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The eggs which are stored in this way are mostly not fertilized, Jim. This becomes probably rather nothing.

greets Jutta
January 31, 2013
12:50 am
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Plaamoo
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Thanks Rudi. A bit too much light and the glass is dirty.

Thanks Jutta, that's what I figured. She's done it correctly before so I don't know what's going on? Maybe the male(her young son) is not cooperating?

January 31, 2013
8:27 am
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Matt
Málaga, Spain
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Good to know you've been raising fry Jim! Are Rhinogobius females known to simply expel eggs sometimes, e.g., in the absence of a receptive male?

Cake or death?
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