The dorid nudibranchs Peltodoris lentiginosa and Archidoris odhneri as predators of glass sponges
Article first published online: 9 MAY 2012
© 2012, The American Microscopical Society, Inc.
Volume 131, Issue 2, pages 75–81, June 2012
How to Cite
Chu, J. W.F. and Leys, S. P. (2012), The dorid nudibranchs Peltodoris lentiginosa and Archidoris odhneri as predators of glass sponges. Invertebrate Biology, 131: 75–81. doi: 10.1111/j.1744-7410.2012.00262.x
- Issue published online: 12 JUN 2012
- Article first published online: 9 MAY 2012
- Bamfield Marine Science Centre and University of Alberta
- NSERC PGS-D
- NSERC Ship Time and Discovery Program
The dorid nudibranchs Peltodoris lentiginosa and Archidoris odhneri were found on glass sponges (Porifera, Hexactinellida) during remotely operated vehicle surveys of three reefs in the Strait of Georgia, British Columbia, Canada. Eight nudibranchs were sampled from 2009 to 2011. Identification of sponge spicules found in their gut and fecal contents confirmed the nudibranchs to be predators of the reef-forming hexactinellids Aphrocallistes vastus and Heterochone calyx, as well as of the demosponge Desmacella austini, which encrusts skeletons of the glass sponges. Four of five nudibranchs dissected for gut content analysis had stomachs containing sponge spicules. Counts from high-definition video footage taken during systematic surveys done in 2009 showed that nudibranchs were found in only two of the three glass sponge reefs. These data provide the first quantitative evidence of a molluscan predator on glass sponges found outside of Antarctica, and establish the first trophic link between glass sponges and their associated community of animals in a sponge reef ecosystem on the western Canadian continental shelf.