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Depth‐dependent swimbladder compression in herring Clupea harengus observed using magnetic resonance imaging
Author(s) -
Fässler S. M. M.,
Fernandes P. G.,
Semple S. I. K.,
Brierley A. S.
Publication year - 2009
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2008.02130.x
Subject(s) - clupea , herring , biology , compression (physics) , volume (thermodynamics) , fishery , magnetic resonance imaging , fish <actinopterygii> , anatomy , materials science , physics , composite material , medicine , radiology , quantum mechanics
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 .