Calanoid copepod eggs in sea-bottom muds. III. Effects of temperature, salinity and other factors on the hatching of resting eggs ofTortanus forcipatus

✍ Scribed by S. Kasahara; T. Onbé; M. Kamigaki

• Publisher: Springer-Verlag
• Year: 1975
• Tongue: English
• Weight: 376 KB
• Volume: 31
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00390645

✦ Synopsis

The "resting" eggs of a marine neritic copepod, Tortanus forcipatus Giesbrecht, recovered from sea-bottom sediment were hatched in the laboratory. Hatching occurred at temperatures of 13 ~ to 30~

no eggs hatched at IO~ Temperatures around 25~ were found to be optimal for hatching, although the range of optimal temperatures for hatching was approximately 5C O lower in eggs stored for 14 to 15 months than in those stored for I to 2 months. A wide range of salinity, from 18 to 54~S, was favourable for hachting. Eggs failed to hatch within the sediment mud, which suggests that they are in a state of dormancy in the mud. Hatching was successful under both light and dark conditions.