2015 Leo Ivory Clutch
One of the most important parts of J. Kobylka Reptiles is sharing my experience to support other breeders and hobbyists world-wide. So every year I take the raw number from my incubator and share it (starting in 2008). The best part is seeing how my seasons have progressed over the years!
View the freshly calculated 2015 stats below. You can view all these clutches on my 2015 Incubator Page. As I look at how all the number line up for the past 8 seasons now I’m really shocked at how little variation there is nearly every number except clutches. I definitely feel like I’ve settled in on the ideal number of clutches for my business.
- Total Eggs Laid: 548 (80 Clutches)
- Average Clutch Size (eggs only): 6.85 eggs pre clutch eggs
- Total Slugs Laid: 27
- Average Slugs per clutch 0.33
- Number of Eggs Hatched: 485
- % of eggs hatched: 89%
- Average Incubation Time: 58 days
- Total Females hatched: 254 (52%)
- Total Males hatched: 231 (48%)
| 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|---|---|---|---|
| Total Clutches | 29 | 61 | 56 | 72 | 155 | 145 | 78 | 80 |
| Total Eggs – Avg Egg/Clutch | 202 (6.4) | 369 (6.1) | 341 (6.1) | 473 (6.8) | 1047 (6.8) | 1047 (7.2) | 558 (7.15) | 548 (6.85) |
| Total Slug – Avg Slug/Clutch | 38 (.9) | 61 (.2) | 28 (.5) | 50 (.7) | 72 (.5) | 66 (.5) | 22 (.28) | 27 (.34) |
| # of Eggs Hatched / % | 163 (81%) | 343 (93%) | 313 (91%) | 420 (89%) | 923 (88%) | 915 (87%) | 495 (89%) | 485 (88%) |
| Avg Incubation Time | 57 days | 58 days | 58 days | 57 days | 58 days | 58 days | 57 days | 58 days |
| Total Females Hatched / % | 82 (50%) | 163 (48%) | 160 (51%) | 205 (49%) | 473 (51%) | 481 (53%) | 250 (51%) | 254 (52%) |
| Total Males Hatched / % | 81 (50%) | 181 (52%) | 153 (49%) | 215 (51%) | 450 (49%) | 434 (47%) | 245 (49%) | 231 (48%) |
The Ball Street Journal 
Justin, may I ask what your average incubation temperature was? If you do use temp loggers, could you also tell us what your highest and lowest temperatures were, please?
I keep my incubators at a constant 89 degrees. No major fluctuations to speak of.
Justin is there a certain type of incubator that you use?Or do you prefer homemade?
I have a walk-in incubator “room” now. Works great.
Very nice Justin. Tell me what it was that happened from 2011 to 2012 that you actually doubled your egg numbers? Was it as simple as getting a Ultrasound or was there more too it, like maybe just having way more females? Very interested to find out. Thanks and congratulations along with continued success.
Great question… Mostly it was just a whole lot more females coming up to size. I would say my % of females to become gravid each year is mostly unchanged. The only difference is the number of females I’ve attempted to breed in a given year.
Ultrasounds are great and I recommend them, but they haven’t really changed my production bottom line.
Justin, What’s the number of females you rotated males with relative to these numbers? and/or the % you rotate males with that you get to go? Those stats would be very interesting on top of what you have here. Great stuff!
Unfortunately I don’t have those numbers breeding season is a very fluid time and there are lots of females being bred that I don’t have any intension of them producing… just giving them a kick in the butt to eat, etc. But just as a personal guess, I’d say I have an average of about a 75% production rate from females that are in good shape to produce.
“But just as a personal guess, I’d say I have an average of about a 75% production rate from females that are in good shape to produce.” That may already be the answer to my question- but if you correct the data to include 3 year old females- or females that have already produced at least one clutch and take out virgin females/ 2 year old or younger girls does your percentage of successful females go up?
I would say the % would remain in the 75% range even with those corrections.
Justin for a beginner such as myself who is in his first year what advice could you provide me with to keep me from spinning my wheels? I am still in the process of purchasing and starting my collection. Congratulations on another successful year your snakes are pretty awesome. Thanks Shane
I think this is the info you’re looking for! 😉
https://jkrballstreetjournal.com/2014/07/22/top-10-ball-python-rookie-mistakes-how-to-avoid-them/
This is such a good idea. Great info!!! Thank you
Were there any clutch exclusions from this data? Is data for 2015 mean fir 2015 calendar year?
No exclusions. Its for all clutches hatched during the calendar year.