Research article
Induced metamorphosis in crustacean y-larvae: Towards a solution to a 100-year-old riddle
-
* Corresponding author: Jens T Høeg jthoeg@bi.ku.dk
- † Equal contributors
1 Department of Biology, University of Copenhagen, Universitetsparken, DK-2100 Copenhagen, Denmark
2 Lake Biwa Museum, Oroshimo 1091, Kusatsu, Shiga 525-0001, Japan
3 Department of Chemistry, Biology and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
BMC Biology 2008, 6:21 doi:10.1186/1741-7007-6-21
Published: 20 May 2008Additional files
Video 1 – Swimming y-cyprid. A y-cyprid swimming using its six pairs of thoracic appendages. The clip was recorded from a y-cyprid mounted under a cover slip, whence the body motions do not fully reflect natural swimming. When free in the water column, the y-cyprid swims almost continuously along a more or less straight line.
Format: MPG Size: 5.9MB Download file
Playing the movie within this page requires QuickTime 6.4 or later and JavaScript. Read more
Video 2 – Metamorphosing y-cyprid. Three phases in the metamorphosis of a single y-larva individual. The first phase shows the ypsigon about to escape, but with the posterior part of its body still located within the shell of the spent y-cyprid. The next phase shows the actual exit of the ypsigon from the y-cyprid. The third phase shows the free ypsigon shortly afterwards, when it has moved some distance away from the spent y-cyprid.
Format: MPG Size: 8.8MB Download file
Playing the movie within this page requires QuickTime 6.4 or later and JavaScript. Read more
Video 3 – Free ypsigon. An ypsigon that has just escaped from its y-cyprid. It exhibits moderate body movements (same specimen as shown in Figure 1B).
Format: MPG Size: 7.2MB Download file
Playing the movie within this page requires QuickTime 6.4 or later and JavaScript. Read more
Video 4 – Free ypsigon. A free ypsigon that has moved away from its y-cyprid and now exhibiting very vigorous body movements.
Format: MPG Size: 8.9MB Download file
Playing the movie within this page requires QuickTime 6.4 or later and JavaScript. Read more
Video 5 – Molting ypsigon. Ypsigon, 48 hours after escape from the y-cyprid. Now in the process of molting, while still exhibiting vigorous movements of the body (this is the same specimen as shown in Figures 2C and 2D). Note how the first ypsigon cuticle is clearly separated from the new one by a wide empty space. The internal structure of the ypsigon has not changed noticeably during the molt.
Format: MPG Size: 6.9MB Download file
Playing the movie within this page requires QuickTime 6.4 or later and JavaScript. Read more