Question about egg sacs of <i>Hynobiidae</i>

[tomasz]

As larvae of hynobiids leave egg sacs???

 

[jennifer]

It is difficult to understand your question. I think the larvae swim out from the open end(s) of the egg sac. Is this your question?

 

[TJ]

The egg sac disintegrates over time, allowing the larvae to leave through openings in the sac, usually at one or both ends, like Jen said. The larvae first have to become free of the membranes that surround them while they're in the sac though.

see:

http://www.caudata.org/forum/messages/13/32421.html?1116136842

Some sacs are firm, like those of Hynobius tokyoensis or Hynobius kimurae, while others are very soft to begin with, like those of Hynobius nigrescens.

 

[tomasz]

Thanks Tim

 

[TJ]

My pleasure

Speaking of egg sacs, I will hopefully be able to show pictures of 3-4 different types late this month and early next month, as it's the season and travel plans are in the making.

I'm determined to get some H. nigrescens-in-the-wild shots that will make Henk jump for joy...or wallow in envy

 

[terry]

Good luck in the egg sac search! I look forward to them gelatineous(sp) rolls of eggs!

Which specie was it which carries a slight blue sheen upon its egg sac surface?

 

[TJ]

Thanks, Terry.

You must be thinking of Hynobius kimurae. Their sacs are so very beautiful. A friend took a photo of some really nice ones the other day, attached to the underside of a big rock in a stream, and I'll see if he doesn't mind my posting it here.

 

[tomasz]

I wish success in your work Tim, but on margin, there is for that type of egg sacs (soft or firm) egg sacs Salamandrella keyserlingii????

 

[henk]

Well well well... see I hzave been missing out on Tim makeing me jealous again. Regarding the nigrescens I'll be both delighted and jeralous of the result Tim. Be sure ...

I'm leaving for califirnia on thursday hinking aroung there in order to try and make shots of many salamanders there (we hope)

So far however I already have H. dunni, quelpaertensis en retardatus eggs. The others are still in winter rest... Also the longtoeds laid eggs !! So it is quite good already , hope I can keep up with the rest.

 

[TJ]

Thanks, Tomasz.

Salamandrella keyserlingii also lay egg sacs, and this is what they look like:

http://www.hkr.ne.jp/~rieokun/saramand/sansyouo/sala2.jpg

Henk, sorry but it seems the Fukushima trip to see H. nigrescens and other hynobiids is off and that I'll be going to Okinawa instead, in the first week of April. No hynobiids there!

I'm looking forward to seeing those shots you'll take in California. Sounds like great fun! Congrats on the breeding successes. I'm planning to have my own outdoor breeding pond built, but the only adults I have to breed now are Hynobius retardatus and it might be too late.