08-23-2012, 06:54 PM
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Corydoras julii have been very difficult to find the last few years for some reason; I'd wager export laws have changed in their major collection areas.
The likely reason is given in our profile; but in addition to what is stated therein, another issue could be the flooding this year. According to one collector in Peru, where the probably source river for this species is located, this was the worst year in 20 years for either floods or drought, both of which preventing collection from several areas. [In case you're not familiar with the profiles, they are under the second tab from the left in the blue bar across the top. If the name is used identical in a post to how it is given in the profile, common or scientific, it will shade and you can click that to pop-up the profile.]
Corydoras trilineatus is available captive-bred now (and in fact is what I see the majority of the time when I'm doing fish orders for the store).
This is worth knowing, though I will always select wild-caught over commercially-raised if given the option.
Which brings me to the comment about hardiness raised by fishlover, and to which I do not subscribe. There is plenty of evidence that in most cases, wild caught fish will be less prone to disease in the aquarium. I don't want to get into whether this is or isn't due to inbreeding of captive fish, and I don't know if this plays a part or not, though i suspect it must given the considerable weakening of the various livebearers in particular. But wild fish seem to be "healthier" which is always a good sign, and they are often more colourful. The cardinal tetra has shown this, the wild caught are more brilliant than the tank-raised now appearing.
Last edited by Byron; 08-23-2012 at 07:28 PM..