Chris,
...I usually miss seeing ovulation in my BRBs. I watch them pretty close during breeding season and I am sure that many of them ovulate without noticeably swelling up. On the other hand I have a few times seen enormous ovulation swellings. When I have seen it has been before during or after breeding (lots of variability here) and I have not paid attention to the date. I do pay attention to mating dates and usually mine lay around 5.5 months after last observed mating.
Jeff
>>Chris,
>>
>>Have you counted the elapsed time between ovulation and parturition before?
>>Just curious if we know this for rainbows. I have found that in Erycine boas, the date of ovulation is the good predictor of the date of parturition since there isn't a predicatable pre-birth shed. For example, my experience with Rubber boas is that they generally give birth right around 80 days past ovulation. Desert Sandboas give birth around 90-95 days after ovulation. I don't have much data so far, but what I have is reasonably consistent within a species.
>>
>>Any data on Rainbows?
>>-----
>>Chris Harrison
>>San Antonio, Texas