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Lucania goodei

Home Forums Fresh and Brackish Water Fishes Lucania goodei

This topic contains 0 replies, has 1 voice, and was last updated by  mikev 4 years, 6 months ago.

Viewing 15 posts - 1 through 15 (of 20 total)
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  • #349968

    Matt
    Keymaster

    mikev said 
    one definite difference is that they use spawning pit in substrate but not clear what kind of substrate is needed…. 

    Think that might depend on species? Some will use mops for sure.

    #349972

    mikev
    Participant

    Most likely.

    I’ve been trying to find some info, found some here:

    Reproduction: Males turn bright iridescent blue when in breeding condition, they build a spawning pit and then fiercely guard it from others.

    but I’m not sure this is actually the species being listed.

    #349980

    mikev
    Participant

    @Lucania:

    It seems that there are more variations, cf. photo here:

    http://www.dcnr.alabama.gov/fishing/images/Topminnowbluefinkillifish400A.jpg

    for a yellow version.

    #350043

    mikev
    Participant

    @lucania:

    It took them about a week to color up and start feeding actively (initially they were all hiding under the sponge filter and eating only the food that drifts there.)
    I assume that red is only present in males… a couple now are nicely colored, but my ratio is messed up, either 2m:8f or 3m:7f (not sure about one small fish which shows a bit of color). As luck has it, the DOA was a male :(
    And I found a couple of eggs just now :D (fairly large, at least the same size as fp.gardneri, so the fry should be artemia capable. Not that I know if the eggs are any good yet.)

    #350044

    Matt
    Keymaster

    Good stuff Mike, keep us updated! Do you want me to split this into a separate thread?

    #350056

    mikev
    Participant

    Thank you! :) — sure split, sorry for the hijack!

    #350064

    Matt
    Keymaster

    Done. 🙂

    #302577

    dunc
    Keymaster

    Thanks, Matt,

    OK… I do have Red L.goodei now. One DOA but the rest seem ok albeit very shy and totally lacking color (per vendor takes 2-3 weeks). We’ll see…

    I’m asking about cyprinodon… one definite difference is that they use spawning pit in substrate but not clear what kind of substrate is needed…. would be interesting to see how they do it.

    #350104

    mikev
    Participant

    An update:

    the behavior radically changed after about 10 days… now they consider me the source of food and assemble in front of the tank, even checking their mop does not scare them at all. But once fed, they go hide under the filter for a while…

    Quite enjoyable… albeit the feel is more of a rasbora than of a killie.

    As for the eggs: unless something changes posting them would not be practical. Firstly, the eggs are very few… total collected so far is only 5. I _think_ they are pretty bad egg-eaters. Secondly, the initially collected eggs hatched a couple of days ago (seems like about 6 days incubation at 75F), so one would need to collect a few in 2-3 days at most… right now does not seem feasible, but maybe as they grow they will become more prolific.
    (APPEND: the fry seems to hatch with a large yolk sac.)

    The fry incidentally looks like typical killie.. hangs to the bottom, and hides very well… indeed slightly larger than fp.gardneri fry. I have not seen them since releasing…somewhere under java moss, most likely.

    #350159

    mikev
    Participant

    Nay, I lied :(

    The fry may look initially like a killie, but they behave totally different from Western African killies… hiding stopped after about 5 days and now they hang near the surface.. feel like rainbow rather than killies.

    #350185

    Matt
    Keymaster

    What are you feeding them Mike?

    #350194

    mikev
    Participant

    Adults: frozen spirulina brine, bloodworms. I tried artemia, but they are not very interested.
    Fry: artemia, paramecium (almost certainly unneeded, but they eat it)

    #350513

    mikev
    Participant

    OK… I think i figured this out (10 eggs yesterday :D ). The fish is actually easy to breed if you understand them.

    I had three problems:

    1. Firstly, they really need live food, more than for instance west african killies. Daphnia would have been the best, but large amounts of grindal worms work too. Getting them to take grindals took about two weeks?! — but now they like them.

    2. Juveniles: most of the fish I have are around 1″… I thought they were all females, but actually most may be immature. They grow very slowly… strange, because the growth rate of the fry is very good, 2cm after about 5 weeks: http://www.micropress-inc.com/fishpic/lucania-fry-2cm.jpg. Even stranger, new fry loves artemia (which probably contributes to growth)… but only slightly larger wild caught fish would not touch it. And juveniles are definitely egg-eaters.

    3. Timing: they need to be given a good meal in the morning.. 2-3 hours later eggs appear. If wait too long, eggs are eaten. Feeding them live food at night is pointless.

    #350520

    Matt
    Keymaster

    Good info and great work Mike!

    #350527

    mikev
    Participant

    Thanks, Matt!

    One more note just for fun: since I had only four babies initially (the eggs were in short supply till now) I tried to raise them with Sawbwa and Aphyosemion bitaeniatum… I expected Sawbwa will not make it — much smaller fry and slow growing — but they did just fine. A.bitaeniatum otoh were all eaten :( At about 10 days of age, Lucania fry decided to hide under the moss, and this is where A.bitaeniatum were…

    Anyway… I’m kind of impressed with the grindal results on lucania … any reasons to think that they may help me with cories or west african killies (having problems with some species)?

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