Diapause in Tortoise Eggs - Page 2

nina · 15-02-2007, 10:47 PM

Thanks, Dan - that is such useful information!

25-03-2007, 09:58 PM

Fantastic infomation

Bride2b · 13-04-2007, 08:03 PM

Wow, its so interesting it must utterly fascinating to watch them grow inside their shells.

Tanya

KearasNana · 13-04-2007, 09:05 PM

That is so amazing, you are so knowledgable!

EJ · 11-06-2010, 06:07 AM

The readers should be aware that this is a theory. A theory that is very difficult to prove.

The first I heard of diapause is with the Egyptian tortoises... they were thought to require a diapause... where the idea came from with them... I can't imagine.

My idea is that diapause is an adaptation to unfavorable conditions... just like hibernation. Think of those eggs laid late in the season (cold or dry)... they have to have a mechanism to survive.

I don't believe it is a necessity. I think it is a fallback for keepers not getting it right in the first place.

It is now suggested that Leopard tortoise eggs 'require' a diapause.

This is an after thought... what triggers diapause... not the top end but the bottom end. There are eggs that require diapause in a single species... and some do not. I'm wondering if there is a trigger that would cause the requirement of diapause...

(Hey, Danny... I'm just jealous you're a god. Someday these people will do a little of their own research and see the point)

onarock · 13-01-2011, 07:14 PM

First, I only have experience in hatching leopard eggs, but I was recently witness to an event with my friends sulca hatch that made me think about some things. My friend hatched a sulcata egg in 45 days. All the other eggs in the clutch went the full incubation period. He speculated that it was an egg leftover from the previous clutch wich made me think about a few things. What if some tortoise speciese lay eggs at different stages of development. Maybe all tortoise eggs go through a diapause and that in some species it occurs in the tortoise and in others it occurs in the nest (kinda like a kangaroo). Do we acutally know all the details in a tortoise eggs development inside the tortoise. Untill we know every stage from the point of conception to the hatch then I would think that its all speculation. On a side note, I know someone who hatches quite a bit of platynota without diapause and it is believed that breaking diapause is required when incubating platynota

EJ · 13-01-2011, 07:23 PM

Who is that?

Quote:

Originally Posted by onarock

First, I only have experience in hatching leopard eggs, but I was recently witness to an event with my friends sulca hatch that made me think about some things. My friend hatched a sulcata egg in 45 days. All the other eggs in the clutch went the full incubation period. He speculated that it was an egg leftover from the previous clutch wich made me think about a few things. What if some tortoise speciese lay eggs at different stages of development. Maybe all tortoise eggs go through a diapause and that in some species it occurs in the tortoise and in others it occurs in the nest (kinda like a kangaroo). Do we acutally know all the details in a tortoise eggs development inside the tortoise. Untill we know every stage from the point of conception to the hatch then I would think that its all speculation. On a side note, I know someone who hatches quite a bit of platynota without diapause and it is believed that breaking diapause is required when incubating platynota

onarock · 13-01-2011, 07:37 PM

Who is who? My friend with the sulcata or my friend with the platynota?

EJ · 13-01-2011, 07:41 PM

The platynota.

(and pete did have a place on the big island... which I didn't know)

Quote:

Originally Posted by onarock

Who is who? My friend with the sulcata or my friend with the platynota?

onarock · 13-01-2011, 07:48 PM

Chris Hedrick. No diapause, as a matter of fact it was a recent phone conversation with him that I asked how long do you break diapuse and he said "I dont and I didnt know that you should". He then said he was going to try it with his next clutch.

How well did you know Pete? I might have some pics of his place in Milili'i <--- that name is hard to type and probably ever harder to read and pronounce for those who arent familiar with Hawaiian.

15-02-2007, 10:47 PM	#11
nina Senior Member Adult Join Date: Jun 2006 Location: Oxford Posts: 2,337	Thanks, Dan - that is such useful information! __________________ http://www.thetortoisetable.org.uk l

13-04-2007, 09:05 PM	#14
KearasNana Senior Member Sub Adult Join Date: Jul 2006 Location: Kent Posts: 1,795	That is so amazing, you are so knowledgable! __________________

11-06-2010, 06:07 AM	#15
EJ Senior Member Adult Join Date: Apr 2007 Location: Atlanta, GA Posts: 8,277	The readers should be aware that this is a theory. A theory that is very difficult to prove. The first I heard of diapause is with the Egyptian tortoises... they were thought to require a diapause... where the idea came from with them... I can't imagine. My idea is that diapause is an adaptation to unfavorable conditions... just like hibernation. Think of those eggs laid late in the season (cold or dry)... they have to have a mechanism to survive. I don't believe it is a necessity. I think it is a fallback for keepers not getting it right in the first place. It is now suggested that Leopard tortoise eggs 'require' a diapause. This is an after thought... what triggers diapause... not the top end but the bottom end. There are eggs that require diapause in a single species... and some do not. I'm wondering if there is a trigger that would cause the requirement of diapause... (Hey, Danny... I'm just jealous you're a god. Someday these people will do a little of their own research and see the point) __________________ Ed Tortoise Keerpers @ http://groups.yahoo.com/group/Tortoise_Keepers and http://www.facebook.com/#!/groups/284442591651347/ Trying to keep the fun in Chelonian care Last edited by EJ; 11-06-2010 at 06:34 AM.

25-03-2007, 09:58 PM	#12
Cpx Guest Posts: n/a	Fantastic infomation

13-04-2007, 08:03 PM	#13
Bride2b Senior Member Sub Adult Join Date: Dec 2006 Posts: 1,301	Wow, its so interesting it must utterly fascinating to watch them grow inside their shells. Tanya

13-01-2011, 07:14 PM	#16
onarock Member Hatched Join Date: Dec 2010 Posts: 327	First, I only have experience in hatching leopard eggs, but I was recently witness to an event with my friends sulca hatch that made me think about some things. My friend hatched a sulcata egg in 45 days. All the other eggs in the clutch went the full incubation period. He speculated that it was an egg leftover from the previous clutch wich made me think about a few things. What if some tortoise speciese lay eggs at different stages of development. Maybe all tortoise eggs go through a diapause and that in some species it occurs in the tortoise and in others it occurs in the nest (kinda like a kangaroo). Do we acutally know all the details in a tortoise eggs development inside the tortoise. Untill we know every stage from the point of conception to the hatch then I would think that its all speculation. On a side note, I know someone who hatches quite a bit of platynota without diapause and it is believed that breaking diapause is required when incubating platynota

13-01-2011, 07:37 PM	#18
onarock Member Hatched Join Date: Dec 2010 Posts: 327	Who is who? My friend with the sulcata or my friend with the platynota?

13-01-2011, 07:48 PM	#20
onarock Member Hatched Join Date: Dec 2010 Posts: 327	Chris Hedrick. No diapause, as a matter of fact it was a recent phone conversation with him that I asked how long do you break diapuse and he said "I dont and I didnt know that you should". He then said he was going to try it with his next clutch. How well did you know Pete? I might have some pics of his place in Milili'i <--- that name is hard to type and probably ever harder to read and pronounce for those who arent familiar with Hawaiian.

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