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Depth-dependent swimbladder compression in herring Clupea harengus observed using magnetic resonance imaging

Research output: Contribution to journalArticle

Author(s)

S. M. M. Faessler, P. G. Fernandes, S. I. K. Semple, Andrew Stuart Brierley

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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.

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Details

Original languageEnglish
Pages (from-to)296-303
Number of pages8
JournalJournal of Fish Biology
Volume74
Issue number1
DOIs
StatePublished - Jan 2009

    Research areas

  • acoustic surveys, Boyle's Law, MRI, physostome, target strength, water pressure, TARGET-STRENGTH, FISH ABUNDANCE

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