Abstract
Changes in swimbladder morphology in an Atlantic herring Clupea harengus with pressure were examined by magnetic resonance imaging of a dead fish in a purpose-built pressure chamber. Swimbladder volume changed with pressure according to Boyle's Law, but compression in the lateral aspect was greater than in the dorsal aspect. This uneven compression has a reduced effect on acoustic backscattering than symmetrical compression and would elicit less pronounced effects of depth on acoustic biomass estimates of C. harengus.
Original language | English |
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Pages (from-to) | 296-303 |
Number of pages | 8 |
Journal | Journal of Fish Biology |
Volume | 74 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2009 |
Keywords
- Acoustic surveys
- Boyle's Law
- MRI
- Physostome
- Target strength
- Water pressure
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Aquatic Science