小豬

這樣阿~~再請問你是用哪些方法檢查有沒有形?

我都是用手電筒照~不過今年照了幾顆都已經轉紅的~還是爆蛋了

不知道是不是用手電筒照不準

reggie

to tortoisedna
great job!!

to 小豬
大概兩到三週蛋表面的色澤其實就有一些差異
主要是有受精的卵會比較死白，不透光
我也會用手電筒照
不過主要的判別是有無血絲

小豬

謝謝啦~~明年再努力囉

raymo

最近喵到這篇文章
和死在蛋中、畸形、早產的問題有關
主要原因是氧氣含量的問題
跟孵蛋箱的設計有關

不想要看全文的可以看我標明的紅色部分


Oxygenation & incubation conditions

One potential problem area often overlooked by those involved in captive breeding chelonians is the requirement of developing eggs for oxygen; admittedly this demand is low in the early phase of development but it does increase (Bellairs, 1969).

Where anoxia of eggs is allowed to occur an increased number of 'dead-in-shell' incidents will be noted.
Embryonic anoxia can also result in hatchlings leaving the egg early (it seems very probable that a rise in blood Co2 levels may act as the 'trigger' for emergence).

Where eggs are incubated in conditions where oxygenation and gas-exchange potentials are limited hatchlings will be seen to leave the eggs in a weak, feeble condition often bearing unusually large egg-sacs. Incubation in sealed incubators or in inadequately ventilated containers can drastically increase both pre-hatching and post-hatching mortalities.

It may also contribute to neo-natal deformities. The practice of incubating eggs in sealed or almost-sealed containers is therefore to be strongly discouraged. Conversely, the airflow of most bird egg incubators is far too high for the successful incubation of chelonian eggs and can easily lead to excessive drying and even to embryonic dehydration. Infertile eggs dehydrate most rapidly due too the lack of formation of protective internal membranes, but even fertile eggs can suffer fatal dehydration if subjected to extended periods of high airflow.

We have found that if the incubator is opened once per day for a 30 second ventilation period this is quite adequate to flush any Co2 build-up and prevents any problems of this nature manifesting.
Whilst it is easier to maintain high levels of humidity in a sealed environment tests have shown that Co2 levels accumulate rapidly in such situations. Embryonic anoxia is quite possibly the hidden factor responsible for many "dead-in-shell" and premature hatchlings encountered by captive breeders where other explanations (e.g incubator failure or genetic mismatches) can be discounted.


Where a sealed incubation environment has been used and high levels of mortality encountered, a change to a more natural and aerated incubation method will often produce an immediate and dramatic improvement in survivorship. It is a myth that because eggs are buried underground they require no oxygen or do not need to ventilate waste gasses - in fact, soil oxygen levels of nesting sites are usually good and permeability comparatively high.

reggie

raymo你指引了一盞明燈啊
感謝感謝

raymo

瑞吉

不知道你們孵蛋的時候氧氣量是如何
我記得以前你的文章有提到偶而要看蛋的情況
但是那樣打開的次數也不夠嗎?

reggie

氧氣沒有儀器輔助大概也很難定量
我現在是乾脆讓蓋子不要蓋密

如果以文中
We have found that if the incubator is opened once per day for a 30 second ventilation period
那我一兩個星期開一次的作法大概也於事無補
不過我還蠻存疑的是
這種作法冬天還能保持溫度嗎?