![]() I think like this for so many fishes, as if to shun the fact that 90% of what we keep in the aquarium these days has never seen a stream, pond, or river.□ The usual stuff, right? Well, it also revealed that the fishes consume filamentous algae, terrestrial insects (including small spiders) detritus, sand, and mud! No wonder this fish is considered literally eats anything! It feeds at the surface and in the substrate.Īnd you know me- once I hear that kind of stuff, I get these weird ideas like, "What if we mimic the conditions of the natural habitat of the fish? Would they do better? IS there an advantage somewhere?" ![]() Its diet, based on gut content analysis, consists primarily of zooplankton and insects. Yeah, these guys are hardly what you'd call "fussy" fish! I mean, if THAT isn't a broad range, nothing is! And it tolerates water with a pH from 6.0-8.0. In fact, I recall reading somewhere that it's "tolerated temperature range" based on wild type localities is from 76.2 – 101.5☏ (24.6 – 38.6☌). Z ebra Danios are able to regenerate their heart, nervous tissues, retina, hearing tissues, and fins!Īnd the amazing thing about this fish is that it's probably THE most bulletproof species you can keep. SImple, boring, "beginner's fish" my ASS! The Zebra Danio is is increasingly being used by researchers as a model for studying genetic effects in vertebrate development. ![]() Spinal curvature- a sign of old age in captive fishes, was not found in wild-caught specimens, leading researchers that the fishes expire well before this malady can occur. However, in the wild, l ength- frequency analysis by researchers demonstrated two distinct " age classes" during the summer months, 0 to one year, and 1 year.indicating that the main period of rapid growth in these guys takes place during the monsoon months (June-September), a period of high temperatures (up to 34 ☌) and food availability. 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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