Research Article
Larval Diel Vertical Migration of the Marine Gastropod Kelletia kelletii (Forbes, 1850)
Table 4
Comparison of experimental and control variables in day-night laboratory trials in jars in 2005 versus short columns in 2007.
| Variable | 2005 | 2007 |
| Environment | Incubator | T-controlled walk-in incubator | Light cycle | 12: 12 | 16: 8 | Egg collection site | Monterey, CA | Palos Verdes, CA | Egg source | Single female | Multiple females | Data collection interval | 6 hrs | 4 hrs | Dark phase starting time | 1700 | 2100 | PAR range | 51–144 | 242–298 | Response factor | % demersal | ZCM | Column dimensions | 8 d 15 h cm | 9.5 d 15 h cm | Phytoplankton present | yes | no |
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