Bronze Corydoras
| Origin= Water systems in Venezuela, Trinidad, and farther south to the La Plata in Argentina. Scientific Name= Corydoras aeneus Max. Size= 2.75" (7CM) pH= 6-8 Temperature= 21-29C (70-90F) Temperment= Peaceful Minimum Tank Size and/or Tank Type= A 10G (40L) Tank, community tank Favourite Foods= Live & Artifical foods. Other Info= There is an albinistic form as well as one with prolonged dorsal and anal fins have been bred by Asian Breeders. Breeding Info= TANK: With 12G (50L) capacity or more, dim lighting. GENDER: The male is limmer and smaller. BREEDING RATIO: 2-3 Males : 1 Female BREEDING WATER: 20-24C (68-76F); pH of 7; dCH max. 2. OTHER BREEDING INFO: Spawning is generally triggered by a drop in atmospheric pressure followed by rain. Such an impulse may be simulated by adding fresh, cooler water to the tank, so that the temperature drops by about 5C (Trying to figure out conversion, silly me, will be up soon). The males will swim nervously about the tank. Prior to the act of mating the female descends to the bottom pursued by several males. One of the males positions himself with his side at right angles to the head of the female and presses her by the barbels to his belly with his pectoral fin - the position of the two resembles the letter "T". With bodies quivering strongly the males releases the sperm and the female the eggs into a pouch is a slit through which the sperm reaches the eggs. The female then swims to a suitable place which she first feels with her whiskers and cleans, after which she opens the fin pouch and with swaying movement of the body sticks the fertilized eggs into the surface. After a short interval, the act of mating is repeated. The spawning period often last several weeks with the female depositing as many as 50 eggs a day. The stongly adhesive eggs are deposited mostly in the upper part of the tank close to the surface, the eggs are about 1.5mm, the incubation period is about 96 hours (4 days). When the fry hatch the water column should be lowered to approximately 4" (10CM). Feeding them free-floating zooplankton is not advisable, the fry have difficulty catching hold of it, Zooplankton should, therefore be provided either frozen or killed with warm water, you can also feed them brine shrimp nauplii. The fry feed not only on the bottom, but also at the surface, where they swim rapidly belly-side up. It is nessecary that eggs be scrapped off the side panes of the aquarium with a razor blade or, incase of rounded objects, remove with the thumb or forefinger; the eggs are blunt and hardy. Eggs so removed may be affixed to the side panes of the nursery tank by pressing lightly with the forefinger (the eggs shouldn't touch one another). INtroduce aeration and colour the water faintly with methylene blue. The addition of one teaspoon of NaCI ofr every 12G (50L) of water will lower the mortality of the eggs and fry. The regular exchange (weekly or forenightly) of 2/3rds of the water with freshwater promotes the growth of the young fish. However, the fry are sensitive to some kinds of treated tapwater. To prevent pronouced mortality of the fish, allow the fresh tapwater to stand 24 hours before putting it in the tank. |  Photo Credit: All Fish  Photo Credit: All Fish  Photo Credit: All Fish  Photo Credit: All Fish  Photo Credit: Bombcat's Fishy Page This is a picture of the albino varation  Photo Credit: Bombcat's Fishy Page This is another picture of the albino varation |
              
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