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Ko-fi	Liberapay

This instance provides a wiki service which only users of this lemmy can use. If you want a wiki for your community or your account or whatever, feel free to use it

This instance currently allows new community creation, however the following subjects are explicitly not allowed as communities.

Nothing positive or promoting cryptocurrency, blockchain or NFTs
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Preferably you'll stay within the topics endorsed by this instance (see first line)

Note that you are expected to attempt to create an active community and not just squat on a name. Inactive communities will be purged after receiving a warning.

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Alternative Frontends

founded 2 years ago

ADMINS

Zebra shark egg opening (files.catbox.moe)

submitted 2 years ago by TheLobotomist to c/bewowed

1 comments fedilink

An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous sharks, skates and chimaeras.

Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 embryos.

Oviparity in sharks can be categorized as single or retained. With single oviparity, the egg cases are extruded soon after fertilization. With retained oviparity, eggs are kept within the oviduct for a period of time before depositing outside of the body as an unhatched egg case.

It is thought that viviparity is the ancestral condition for sharks, and that it evolved through the elongation of retention time of retained oviparity.

Oviparous sharks are known to regularly produce unfertilized eggs when kept in captivity without males.

Zebra shark egg opening (files.catbox.moe)

submitted 2 years ago by [email protected] to c/[email protected]

0 comments fedilink

An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous sharks, skates and chimaeras.

Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 embryos.

It is thought that viviparity is the ancestral condition for sharks, and that it evolved through the elongation of retention time of retained oviparity.

Oviparous sharks are known to regularly produce unfertilized eggs when kept in captivity without males.