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A few tiny larvae

Home Forums Fresh and Brackish Water Fishes A few tiny larvae

This topic contains 0 replies, has 1 voice, and was last updated by  Plaamoo 5 years, 5 months ago.

Viewing 15 posts - 1 through 15 (of 23 total)
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  • #302419

    Ferrika
    Participant

    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

     

    R. leavelli, day 13

     

     

    B. doriae, day 16

     

    #349057

    Graham Ramsay
    Participant

    Great job – and nice pictures.

    #349062

    Plaamoo
    Participant

    That’s a lot of gobies! well done Jutta!!

    #349063

    mikev
    Participant

    Joining the crowd : well done!

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

    #349064

    Ferrika
    Participant

    @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.

    #349069

    Matt
    Keymaster

    Very very cool Jutta, congrats on all the new fry.:D Are the supplements you use to feed the Brachionus similar to any of these?

    #349072

    Ferrika
    Participant

    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.

    #349078

    mikev
    Participant

    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!

    #349090

    Matt
    Keymaster

    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. :)

    #349094

    Ferrika
    Participant

    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”.

    #349105

    Graham Ramsay
    Participant

    @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.

    #349114

    Matt
    Keymaster

    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!

    #349120

    BallAquatics
    Participant

    @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

    #349160

    Bully
    Participant

    @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? 

    #349161

    Ferrika
    Participant

    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.

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