Substance in an animal egg consisting of protein and fat that nourishes the developing embryo.
Glossary: yolk
February 15th, 2012 — 3:39pm
Glossary: yolk sac
February 15th, 2012 — 3:39pm
A membranous sac containing yolk attached to the ventral surface of embryos and early larvae in some fishes. Retained for a period post-hatching in those species which form yolk sac larvae.
Glossary: yolk sac larva
February 15th, 2012 — 3:39pm
Post-hatching larval stage occurring in many fish species whereby the yolk sac remains attached to the ventral surface for a period. The larva does not feed normally until the yolk is fully-absorbed.
Glossary: yolk sac viviparity
February 15th, 2012 — 3:39pm
Form of livebearing in which the larvae are mostly nourished by a yolk sac which is fully-absorbed prior to birth.
Aphyosemion rectogoense
Many thanks cyprin, the image has now been removed.
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