Food availability also acts as cue for breeding." (Source - Fishbase)Īnd about this "annual" thing. Sure, in the aquairum, they can live 4-5 years. Like, there are no less than 13 scientifically recognized wild strains of this fish!Īnd there's more cool stuff you can find in the scientific literature:įor example, ichthyologists feel that this fish, ".a ppears to be primarily an annual species in the wild, the spawning season starting just before the onset of the monsoon." And, " Spawning is induced by temperature and commences at the onset of the monsoon season. The more I researched this fish beyond the usual aquarium hobby stuff, the more remarkable stuff I found. He published " An Account of the Fishes Found in the River Ganges and its Branches" in 1822, in which he described this fish and 9 other Danio species. It was first described by Francis Hamilton, a surgeon with the British East India C ompany, stationed in West Bengal in the early 19th Century. Yeah, this fish has been known to science- and the aquairum hobby- for a very long time. I've never forgotten how much I liked the Zebras- or almost every other Danio species kept in the aquarium. As a kid, I think one of the most memorable sights in my first aquarium, complete with blue gravel and plastic plants, was my group of 8 Zebra Danios ( Danio rerio ) racing at high speed around the tank in a furious fashion, as if they had to get somewhere in a big freaking hurry.only to reverse course, and do it all again.
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