Water changes in trout eggs at the time of laying

✍ Scribed by Manery, Jeanne F. ;Irving, Laurence

• Publisher: Wiley (John Wiley & Sons)
• Year: 1935
• Tongue: English
• Weight: 367 KB
• Volume: 5
• Category: Article
• ISSN: 0095-9898
• DOI: 10.1002/jcp.1030050405

✦ Synopsis

It is a matter of common knowledge that fertilized eggs of many marine and fresh water organisms have a higher water content than unfertilizcd eggs from the oviduct. The swelling of sea urchin eggs at fertilization or laying has been reported by Lillie ( '16) and Hobson ( '32). Measurements of depression of the freezing point of egg contents have been utilized to demonstrate that, with swelling, there is dilution of the egg contents on fertilization in fresh water forms. Runnstrom ('20) reported a freezing point depression of -0.645"C. for Salmo salvelinus oviduct eggs, and -0.599"C.