Posted 23 August 2012 - 05:02 PM
SCIENTIFIC NAME Corydoras Aeneus
ORIGIN South America
MAXIMUM SIZE 7-8cm (approx 3 inches)
TEMPERATURE RANGE 22-26 degrees (72-79F)
CARE A low PH is prefered at around 6.4 - 7. It is also a must to keep corydoras on either a sand substrate or a smooth pebble as a rough substrate will wear away their barbels which can lead to infection.
FEEDING - flake, catfish pellets/wafers, sinking granuals and a good selection of frozen or live food - bloodworm being a favourite for mine. They also go crazy for a dried tubiflex block stuck to the glass (a couple of inches from the substrate so they can feed easily)
SEXING All corydoras can be difficult to sex and there are no obvious differences when they are very young. As they get to full size the difference between male and female can become more noticeable. Basicly the female will be larger and more rounded than the male.
OTHER Breeding Corydoras - I have found breeding happens only when they are ready. They can be prompted with cooler water changes but I have found this to be an unreliable method. They need to be conditioned with plenty of good food - generally if there is an abundence of food they are more likely to consider increasing their numbers.
Cories are egg depositers. When breeding the female and male with go into a T-Position. The female takes the males sperm into her mouth, she will then clamp her anal fins together and lay eggs into them. She will hold them between the fins until she is happy she has found a suitable place to place them. She will clean the area with her mouth and then lay the eggs - a flat surface such as the glass is often the chosen place but I have found eggs on leaves. The eggs can take anything from 3 to 7 days to hatch. During this time the egg will go from a creamy colour to a dark grey. A mature female can lay over 100 eggs.
Posted 20 October 2012 - 05:48 PM
Here is what Planet catfish says about aeneus spawning:
Here, using one of his pectoral fins, the male clamps the female to his side by her barbels and fertilizes a small batch of eggs held within the protective basket formed by her pelvic fins. The adhesive eggs are then placed on plants or aquarium walls and the process repeated.
And here is what Ian Fuller writes about spawning corys in general:
After mating the female will rest momentarily and then swim off in search of a suitable site to deposit her egg/s, which may be on the tank glass or on one or all of the other tanks furnishings. I have found that C. paleatus seem to prefer the tank sides to deposit their eggs on, with C. aeneus having a preference for plants and mops.
PC and Ian both seem not to mention anything about sperm in the mouth of the female nor about the cleaning spots by the female after the eggs are fertilized. Rather she cleans before the spawning.
My experience is that storms (barometric pressure drops) coupled with water changes most often trigger seasonal spawners. More difficult species may require temperature drops and some other parameter specific conditions. Of course the feeding of high protein food, live being the best, is also key factor.
Posted 18 November 2012 - 04:29 AM
Posted 19 November 2012 - 10:27 PM
For the eggs to be furtile there has to be male sperm in there somewhere. The male does not pass over the eggs and fertilize them as with some species. Nor does he wrap himself around or swim at the side as with others.
The forum asked for us to have a go at writing a species index and I did, end of really ...
Snazy - it appears you have seen exactly what I have seen. She clamps herself to the side of the male and draws "something" (what else can it be but sperm?) from him, clamps together her fins and eggs appear between them. She holds them there until she finds somewhere to lay them .... *shrugs*
Posted 09 January 2013 - 03:46 PM
Hope this clarifies.
Now gone salty! Follow my journey into the salty side here.