Breed­ing non-an­nu­als

Practical Fishkeeping (UK) - - Species Showcase -

Aphyosemion and Fun­du­lopan­chax breed quite read­ily in the aquar­ium. They don’t need par­tic­u­larly soft or acidic wa­ter – for best re­sults a ph of 6.0 to 6.5 is ideal, but in­stances of them breed­ing in a ph of 8.0 isn’t un­heard of.

Add a pair or a male-fe­male-fe­male trio in some­thing like a 20l tank with spawn­ing mops around it to sim­u­late plant life. The tem­per­a­ture should be 21-24°C and high-pro­tein live and frozen foods fed to con­di­tion the brood stock.

Killifish lay small amounts of eggs daily over a week or two and a healthy batch should re­sult in 4060 fry. The eggs can be col­lected from the spawn­ing mops and ei­ther in­cu­bated in wa­ter or in damp peat/ co­conut fi­bres for trans­porta­tion – keep them dark in ei­ther sit­u­a­tion.

Egg fun­gus can be an is­sue when eggs are kept in wa­ter, but a low dose of methy­lene blue will help to re­solve that. Daily re­moval of any white eggs is needed along with reg­u­lar, small wa­ter changes.

The de­vel­op­ing fry use all the yolk while in their eggs and are ready to eat brineshrimp nau­plii straight af­ter hatch­ing. Growth rates are fast and the young can soon be slowly con­di­tioned to harder wa­ter.

Even with no in­ter­ven­tion it’s still prob­a­ble that a few odd eggs will de­velop and pro­duce some fry in a ‘per­ma­nent’ set-up. With heavy plant­ing there’s a chance they could sur­vive to ma­tu­rity but this leaves much to luck.

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