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Normal functioning and experimental behavior of the egg and sperm collectors of the echiuroid, Urechis caupo

โœ Scribed by MacGinitie, G. E.

Publisher
John Wiley and Sons
Year
1935
Tongue
English
Weight
753 KB
Volume
70
Category
Article
ISSN
0022-104X

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โœฆ Synopsis

Urechis caupo (Fisher and MacGinitie, '28 a ) is proving to be such a valuable animal for experimental purposes that the following information relative to its sex activities may be welcomed at this time.

Worms of this species may be kept for several months in salt water aquaria with running water. If they are placed in glass tubes to simulate natural burrows, so that they may feed (Fisher and MacGinitie, '28 b), they may be kept indefinitely.

IW. W. Newby at Btanford

University is now working on the histology of this animal, and his determination of the areas concerned with the formation of sex products should appear in an early paper. I am indebted to him for the prepared slides used i n the preparation of this paper.

๐Ÿ“œ SIMILAR VOLUMES

The fertilization of eggs and the rearin
The fertilization of eggs and the rearing of the larvae of Urechis caupo within the blood cavity of the adult animal
โœ MacGinitie, G. E. ๐Ÿ“‚ Article ๐Ÿ“… 1935 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 276 KB

Del N a r 'This work was the result of a suggestion made by Dr. T. H. Morgan. aEggs of Urechis may be fertilized readily in centrifuged blood plasma, but This phase of the work such fertilization seems to require an excess of sperm. will be reported on later.

Evidence for a polyspermy block at the l
Evidence for a polyspermy block at the level of sperm-egg plasma membrane fusion inUrechis caupo
โœ Paul, Miles ;Gould-Somero, Meredith ๐Ÿ“‚ Article ๐Ÿ“… 1976 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 751 KB

## Abstract The results of sperm binding experiments reveal no change in the sperm binding properties of the egg surface coat at fertilization of __Urechis caupo__ eggs. When fertilized eggs are reinseminated, sperm continue to attach to the egg surface coat. The acrosomal tubules of supernumerary