Egg Re-Absorption Cycle

christian lawrence clawrence at
Thu Apr 21 05:43:00 EST 2005


Here are a few -
Eaton, R.C., R.D. Farley. 1974. Spawning cycle and egg production of
zebrafish, Brachydanio rerio in the laboratory. Copeia 1974(1):195-204.
Hisaoka, K.K., C.F. Firlet. 1962. Ovarian cycle and egg production in the
zebrafish, Brachydanio rerio. Copeia 1962:788-792.

Christian Lawrence
Brigham and Women's Hospital
Karp Family Research Laboratories 06-004B
One Blackfan Circle
Boston, Massachusetts 02115
Tel: 617.355.9041
Fax: 617.355.9064

-----Original Message-----
From: Meghan Nesler [mailto:megannes77 at]
Sent: Wednesday, April 20, 2005 2:06 PM
To: clawrence at
Subject: RE: Egg Re-Absorption Cycle

Hi Christian,

Thank you for the very helpful information - do you know off-hand of any
specific literature where I could find more details on this?

Many thanks,

>From: "christian lawrence" <clawrence at>
>To: "Meghan Nesler" <megannes77 at>,<zbrafish at>
Subject: RE: Egg Re-Absorption Cycle
>Date: Wed, 20 Apr 2005 13:35:50 -0400
>Depends on conditions (water quality, temperature, diet, exposure to
males, other females, etc.), and upon the individual, but at 28.5C, fed
3X day with
>live artemia, and no exposure to male between spawning events, the
ovarian cycle is around 5-7 days.  You can find this in the literature
(with a little digging), as well.  The eggs will either be reabsorbed or
released during the next spawning event.  They can also build up and
block cloaca (i.e., egg-bound females).
>Christian Lawrence
>Brigham and Women's Hospital
>Karp Family Research Laboratories 06-004B
>One Blackfan Circle
>Boston, Massachusetts 02115
>Tel: 617.355.9041
>Fax: 617.355.9064
>-----Original Message-----
>From: owner-zbrafish at
>[mailto:owner-zbrafish at]On
>Behalf Of Meghan Nesler
>Sent: Thursday, January 20, 2005 3:48 AM
>To: zbrafish at
>Subject: Egg Re-Absorption Cycle
>Hello Group,
>Does anyone know how long an egg would typically be maintained by a
female zebrafish before being reabsorbed if she is not able to release
the egg through spawning?
>Thank you,
>Meghan Nesler

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