Only 30 years ago marine fish were not bred in captivity. Many books at the time used the phrase "Never bred in captivity"
about species we take for granted are spawnable today but in all that time one constant remains: some killifish are very very difficult to breed: The Raddaella complex in Aphyosemion, the Diapterons and Episemion to name a few. Eggs a re few and nearly all fungus despite using the soft water they require. The A. cameronense group are purported to be difficult but many people find the no challenge to get fry. But the batesli/kunzi/splendidus complex is another matter. The outliedr is in Germany they are less of a challenge. Is it somethig in the water?
It might be. The water in Germany has something in it that is also in the water in Gabon - Selenium, which is not in most places and has tremensoulsy important bioligcal funcstions, no the lest of which is to prevent fungus. Both aniuamlas ans pamts suquester selenium i the sex cells (both eggs and sperm) to give the next genrait the best chance. Tihs is the reason puming sees are good fo ryuou and why "prairie oysters" are eaten. "They're healthy".
Reprodictuve filaue in animalsis often remedied by thr addition of selenium. Let's look at a few rasone why as how thes eappy to exotic Aly9seomi.
Chemist of selenium
Biockje, s celsn
virus
bactria
parasrs
water i gabon
water in germamy
ware ri the us and uk
how to add it
how to feed it
At this point in in the 21s century but there's no excuse for any viral infection any more.
7000 years ago in India they figured this out. The Chinese got it 5000 years ago and it's why Astragalus is in literally half of all traditional Chinese medicines. Four years ago at Harvard a research scientist named Lipinski set out to explain the mystery if the strange Ebola immunity that's been known (but I would not say well known; it's not in _The Hot Zone_ which is the only book about Ebola) among people of the coastal forest of west Africa. First encountered in 1976 when Ebola was first documented the immunity ranges up to 33% of some populations as measurd by ZEBOV immunoassay of every tenth person in Gabon by the Pasteur Institute.
Taylor in 1995 suggested a mechanism which while not wrong was tangential to the issue, and in a nutshell, in the presence of the right amount of selenium Ebola is unable to make that first chemical bond it needs to make, which is a disulfide bond so it should be obvious if you think about it, to be able to connect to the host cell. If that can't happen it dies. This is no theory it's the molecular biology explanation for an immunity we're long known about but were not able to explain until now.
Shortly after this came to light the US quietly changed the level of selenium in the RDA guidelines. Hopefully Canada will address this soon.
Especially those in and around the Ebola virus. In Canada that's Manitoba.As of this moment I'm pretty sure nobody in the facility has heard of this yet. By all that's holy somebody prove me worng here, please.
Now the catch it works on all viruses. Two brazil nuts a day is all you need to raise serum selenium. This would make flu extinct if we had the wherewithal.
Refs:
http://www.nytimes.com/2014/09/06/health/ebola-immunity.html
http://en.ird.fr/the-media-centre/scientific-newssheets/337-possible-natural-immunity-to-ebola
http://www.rexresearch.com/ebola/seleniumebola.htm
http://www.journalrepository.org/media/journals/BJMMR_12/2014/Dec/Lipinski632014BJMMR14858.pdf
You'd think it would be " the best color" or "the biggest" but first you have to get past the fertility hurdle as the eggs can be 2% to 95% fertile - depending. A hypothesis has been running around for a while that nobody has disproved, so it may offer some hope, otherwise Tyrone is right, breed many males and see if any produce fertile eggs.
Here's the idea:
1) SJO is only found in areas of good to better soil selenium; seawater or better.
2) Distribution of this essential mineral/element is spotty; only in selenium rich streams will you find SJO (same as (KUZ/BAT/SPL)
3) Of all fish foods only bloodworms contain selenium.
4) Selenium is 99% of the time the source of fertility problems in all animals. Too low or too high and there are reproductive failures. The major role of Selenium in in eggs and seeds is killing fungus and preventing viruses and bacteria from being able to reproduce.
Si, in theory feeding SJO bloodworms, daily, would in theory raise serum selenium level (as measured by GPx3 levels) in roughly 12 weeks; wild fish should breed right away with good fertility but 12 weeks later maybe not so much.
I bred gularis once as as teen and had a very very good hatch wityh over 600 fry of Al Mikkelsons 1st place SJO in the AKA conventyion in the late 1970s - and for reference this will pretty much fill half a suburban basement with aquariums.
Since then I've bred SJOn lots of times - always without bloodworms and on the false premise that white worms and black worms and live brine shrimp are ok. Turns iout they'rfte not. and alwasys has miserasble success rates, as low as 2%. Over the years I notieced sucessful bvrederds alwsaysd usde bloodworms and oince thst are having pppor luck do not. So take thzt fopr wehaty it's worth, it'sd jsut sa theory bnut it does sem to mat6ch ther facts