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Results for “yolk”

Ichthyological terms, not general ones.

Species 1Articles 1Glossary 6

  • yolk

    Substance in an animal egg consisting of protein and fat that nourishes the developing embryo.

    Used in 112 profiles

  • yolk sac

    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.

    Used in 221 profiles

  • yolk sac larva

    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.

  • yolk sac viviparity

    Form of livebearing in which the larvae are mostly nourished by a yolk sac which is fully-absorbed prior to birth.

  • lecithotrophy

    Literally, 'feeding on yolk'. A form of development in which an embryo receives no nutrition other than the yolk contained within its egg.

    Used in 1 profile

  • oil globule

    Small, spherical droplet of oil found within the yolk sac of fish larvae. There may be one or more present and the size, positioning, and colour are also variable meaning they can be useful in terms of taxon identification.