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Boas, viviparous or ovoviviparous?

CBH Jan 25, 2006 08:19 PM

That is the question. Just curious...

Thanks,
-----
Chris Smith
Contact
Captive Bred Herps

Replies (4)

joeysgreen Jan 25, 2006 10:39 PM

I sometimes get these mixed up, but viviparous means live-birth, while the other is egg laying.

Boas would then be viviparous, or live-bearing.

Ian

bthacker Jan 25, 2006 11:00 PM

I would say ovovivparous as the young have egg sacks that the break upon exiting or outside of the mom. but here are defs for both.

Main Entry: ovo·vi·vip·a·rous
Pronunciation: -"vI-'vip-(&r&s
Function: adjective
: producing eggs that develop within the maternal body and hatch within or immediately after extrusion from the parent —compare LARVIPAROUS, OVIPAROUS, VIVIPAROUS

Here is the def for Viv

1 entry found for viviparous.
Main Entry: vi·vip·a·rous
Pronunciation: vI-'vip-(&r&s, v&-
Function: adjective
: producing living young instead of eggs from within the body in the manner of nearly all mammals, many reptiles, and a few fishes —compare LARVIPAROUS, OVIPAROUS, OVOVIVIPAROUS —vi·vip·a·rous·ly adverb

Kelly_Haller Jan 26, 2006 12:50 AM

Almost all live-bearing snakes are considered ovoviviparous because the developing embryo in the females body is nourished entirely by energy stored in the yolk of the egg. This includes all true boas. A snake can only be considered viviparous if the embryo obtains some of its energy and nutrition directly from the mothers body through a maternal tissue connection similar to a placental membrane. True viviparous reproduction in snakes is rare and only occurs in a very few colubrids, elapids, and vipers.

Kelly

CBH Jan 26, 2006 09:04 AM

np
-----
Chris Smith
Contact
Captive Bred Herps

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