A Mg++ dependent cortical reaction in the eggs of penaeid shrimp

✍ Scribed by Clark, Wallis H. ;Lynn, John W.

• Book ID: 102336807
• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 431 KB
• Volume: 200
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402000122

✦ Synopsis

Abstract

Mature penaeid oocytes contain large cortical specializations (rods) in their cortex. These rods reside in membrane crypts and are isolated from the external environment by a thin investment coat which surrounds the oocyte. When oocytes contact seawater, at spawning, their cortical rods are expelled and form a striking investment layer which subsequently dissipates. During cortical rod dissipation a hatching membrane forms around the egg. Oocytes spawned into Mg^++^ free seawater do not exhibit cortical rod explusion. If oocytes spawned into Mg^++^ free seawater are returned to normal seawater cortical rod explusion proceeds, however the expelled rods do not dissipate.