Striped bass larvae, native to the Shubenacadie River, catch invertebrates in
darkness using mechanoreception via lateral line neuromasts. The neuromast total
increased from 17 at first feeding (5 to 7 dph) to 135 by the juvenile stage (27 dph). A 5
mM neomycin dose ablated neuromasts, confirmed by fluorescent and confocal
microscopy. In feeding trials, larvae with and without functional neuromasts were offered
Artemia salina in darkness or light. To identify ontogenetic changes in feeding,
experiments were repeated at 10, 13, 17, and 20 dph. In darkness, neomycin treated
larvae caught fewer prey (~5 Artemia h-1 at all ages, p<0.05) than larvae with intact
neuromasts (10 dph, 16 Artemia h-1; 20 dph, 72 Artemia h-1). In light, neomycin did not
affect feeding, indicating no deleterious side-effects. Neomycin did not damage olfactory
or taste cells judged by FM1-43FX and calretinin staining. The results support the
contribution of mechanoreception to non-visual feeding. / Master's thesis
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:NSHD.ca#10222/13978 |
| Date | 19 May 2011 |
| Creators | Sampson, Julia A. |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
Page generated in 0.0018 seconds