swan Archives - British Waterfowl Association https://www.waterfowl.org.uk/tag/swan/ Conservation, Education and Preservation Sat, 14 May 2022 07:46:18 +0000 en-GB hourly 1 https://wordpress.org/?v=6.9.4 Pal-Mates … weekend web tip https://www.waterfowl.org.uk/pal-mates-weekend-web-tip-17/ Fri, 13 May 2022 07:34:11 +0000 https://www.waterfowl.org.uk/?p=19507 V is for vitelline membrane. This is a gossamer-fine, multi layered, protein membrane separating the yolk from the white (albumen) in the egg. The fine twisted cord seen in the tweezer is one of the chalazae, holding the yolk in position. The developing embryo is attached to this membrane and floats to the surface — […]

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]]> V is for vitelline membrane. This is a gossamer-fine, multi layered, protein membrane separating the yolk from the white (albumen) in the egg. The fine twisted cord seen in the tweezer is one of the chalazae, holding the yolk in position. The developing embryo is attached to this membrane and floats to the surface — one of the reasons we turn the eggs first one way then the other. If we always turn them in the same direction, the chalazae winds up into a knot.

The vitelline membrane separates the yolk from the white.

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