Qns about Sexing Cories

philtre · Post by **philtre** » 06 Jan 2003, 04:52

Hiyah all ....

was wondering how long does it take for cories to become mature?I read somewhere that it will take on the average 8 - 12 weeks for fries to reach adult colouration. But does this mean they are sexually mature as well? ( doubt so right?)

Also, when can you sex a cory? As in how old do they get before you can determine if it's a male or a female?

thanks all!

cheers
philtre

clothahump · Post by **clothahump** » 06 Jan 2003, 10:28

I have had aeeus spawn at 9 months old but this might not be rule of thumb for the rest.

The following pic is from a friend of mine that shows the difference in body shape, male is blue.

philtre · Post by **philtre** » 06 Jan 2003, 11:46

Hi clothahump, thanks for your post! btw, that's a great illustration. 9 months and they are spawning ... hmmm ..... how early before you can sex them? I know that you're suppose to look at the body shape and fins when attempting to sex them ... but I suppose my question is when can the cories be sexed?

thanks again!

cheers
philtre

clothahump · Post by **clothahump** » 06 Jan 2003, 11:49

With most of them I can tell the difference at about 6 months.

Yann · Post by **Yann** » 06 Jan 2003, 11:50

Hi!

Yes I have some to spawn at around that age as well maybe a month or two younger.

As you can see on the drawing , male are usually slimmer, smaller in size, in some species the colouration can be a bit different. The pelvic fins are more round in female and more pointed in males, on several species the male pocess a longer dorsal fins.

Cheers
Yann

YouTube · Post by **Jools** » 06 Jan 2003, 15:21

Tim,

That's a cool picture, more of those sorts of things for various catfish families would really help. I have to say though that the pelvic fin shape is a little misleading. It is blunt on the red male and more pointy on the blue female. This is the wrong way around, it should be pointy on the male!

This is one of Ian's pictures (that I glibly used in the touchpool pages) and shows the difference well too. Female is the larger fish.

Jools

philtre · Post by **philtre** » 06 Jan 2003, 17:36

this is great!

the two questions that I had when I first started out in cories are finally answered! hehehe ....

when they are sexually matured &
how old before one can sex them!

this is just so great. hehehehe....

btw, Jools ... what's the sp in the pic that you showed?

thanks again all!

YouTube · Post by **Jools** » 06 Jan 2003, 17:51

philtre wrote:btw, Jools ... what's the sp in the pic that you showed?

Corydoras araguaiaensis

http://www.planetcatfish.com/ilibrary/c ... /462_f.htm

Jools

Post by **Coryman** » 06 Jan 2003, 19:08

Hey you guys are to quick, I shall have to stay at home all day to keep up with the posts.

To give you a little more info on Cory maturity, a lot depends on the species.

C. pygmaeus can and will be fully mature in about three months.

C. paleatus; C. aneus; and most of the so called round or short nosed species start to mature from 6 to 8 months.

C. acutus; C. fowleri, C. vittatus and most if not all of the long nose species take longer to mature, 8 to 12 months.

C. barbatus and C. kronei can take even longer.

Where there is a definite colour difference between the sexes, members of the so called elegans group are typical examples, all developing fry first show female colouration, when specimens have developed full male colouration they are mature and capable of breeding.

More detailed information can be found in my book;

Ian

philtre · Post by **philtre** » 06 Jan 2003, 19:59

Ian,

it's never too late ... especially when you are nice enough to give so much details! thanks! It really does put things into perspective!

all these are in your book!? wow!

sighh ... wish I had your book.

btw ... how about being able to tell if they are male or female? half or 3/4 way through the periods you listed for each group? I'm asking this coz I've always thought the ideal group to get (and wanted to get) would be 4 males to 2 females. But the ppl at the farm always say they're too young.

Post by **Coryman** » 06 Jan 2003, 20:16

If you are buying small fish I would but in groups of at least 10 then you have a real good chance of having both sexes.

Ian

philtre · Post by **philtre** » 06 Jan 2003, 20:36

thanks all!

I suppose the stage that I'm buying them at ... they'll still be too young. sighhh ... oh well ....

cheers
philtre

Post by **Coryman** » 07 Jan 2003, 23:16

What you need is a little patients, with some species they are always imported small and imature. I get more enjoyment from growing fish from fry and seeing them grow into adults and when they breed its an added bonus.

Ian

clothahump · Post by **clothahump** » 07 Jan 2003, 23:50

Revamped pics from Macquatic, are these better guys?

philtre · Post by **philtre** » 08 Jan 2003, 04:16

hi clothahump,

and again, great pics! one look and it tells all.

Ian,

yeah ... I suppose with limited tank space, I would want to start them right. It'll be really interesting to breed them. Had my c. aeneus for about 10 months now ...but they are still not doing the thing.... sighhh ..... In that group I have about 3 females and 4 males (if I'm right).

Recently while adding some little fellas (pandas et al), I came across these questions.

Thought I'll find out more about when these little fellas can be sexed and when they become sexually matured.