Nofima reports

Rapport/Report 18/2006 English summary

Midling, Kjell Øyvind; Koren, Christian; Sæther, Bjørn-Steinar

Publication details

Publisher: Nofima AS (tidligere Fiskeriforskning)

Issue: 18/2006

Number of pages: 19

International Standard Numbers:
Printed: 978-82-7251-594-1

Open Access: green


The effect of gas-bladder rupture in cod was evaluated in 80 cod, from catch (one hour), 24 hours, 72 hours and 384 hours post catch (n=20 in each group). Beside measurements of size and positions of wholes, bleeding and residual gas under the peritoneum, the main finding was the role of the oval-lining. After rupture, this lining covers the whole in the bladder-wall immediately post rupture. This enables the cod to restore the function of the bladder shortly (seconds) after rupture and regain normal buoyancy. It is not likely that rupture of the gas-bladder in cod reduces the welfare in capture-based aquaculture significantly.