The effects of three catching methods; trawling, gillnetting and poundnetting, on the quality of Baltic herring when stored at 8–16 °C were studied. The proportion of dead fish in the catch increased when the trawling time was increased from 2 to 5 h. Rigor mortis appeared soonest in fish caught by the gillnetting method being practiced. The inosine monophosphate (IMP) content was also lowest in gillnet-caught fish, indicating a loss of freshness. Differences between fish caught by the different methods could not be detected by sensory testing or on the basis of the dielectric properties of fish as measured by a Torrymeter GR device.
Hattula, T., Luoma, T., Kostiainen, R., Poutanen, J., Kallio, M., & Suuronen, P. (1995). Effects of catching method on different quality parameters on Baltic herring (Clupea harengus L.). Fisheries Research, 23(3-4), 209-221. https://doi.org/10.1016/0165-7836(94)00358-4