Something else to read:
Rapid recovery of exhausted adult coho salmon
after commercial capture by troll fishing
Anthony P. Farrell, Patricia E. Gallaugher, and Richard Routledge
Abstract: To reduce mortality in the by-catch of commercial salmon fisheries, techniques are being explored to revive
fish before live release and improve survival. By measuring blood and muscle variables, we demonstrated that capture
of coho salmon (Oncorhynchus kisutch) by commercial trolling methods resulted in severe exhaustion and stress, e.g.,
muscle lactate reached 46.1 mmol·kg–1 while muscle phosphocreatine (PCr) decreased to 6.1 mmol·kg–1. Nevertheless,
coho salmon recovered rapidly by swimming in a cage alongside the vessel while fishing activity continued. In particular,
there were significant increases in muscle glycogen and PCr levels, and a decrease in muscle lactate after two
hours. Notably, and in contrast to when exhausted fish are held stationary during recovery, plasma lactate remained low
(<4 mmol·L–1) during recovery, a phenomenon observed in earlier laboratory studies with rainbow trout (Oncorhynchus
mykiss). There was no postcapture delayed mortality after 24 h. Therefore, we have established that postexhaustion activity
promotes a rapid recovery in wild salmon and this result might find application in nonretention commercial and
recreational fishing.
Thanks for your input Pseudonym. Perhaps long playing times are not as detrimental as prevously thought. I'll still fight the fish quickly, because I like to catch lots , but will hold my tongue when I watch others opting for the long battle.