Postmortem changes of acid-soluble phosphorus compounds of fish muscle were studied to know how the immediate treatments after its catch have effects upon the glycolysis. Frigate mackerels, Auxis tapeinosoma (Bleeker), caught by angling were divided into two different killing groups: the one was instant death which was killed cutting head off immediately after the catch, and the other death in agony which was dead after struggling for several minutes in the sea-water pool at the bottom of fishing boat. As shown in table 1, remarkable differences of acid-soluble phosphorus compounds were recognized between the fish muscle of instant death and death in agony. For example, the quantity of true inorganic P increased only slightly in the muscle of instant death, but did almost as twice as original amount in four hours after death in the muscle of death in agony. On the contrary, the quantity of adenosine triphosphate in the muscle of death in agony, decreased very rapidly disappeared within four hours after death, and it was recognized to enter into full rigor. Moreover, the quantity of both adenylic and inosinic acid which was derived from the breakdown of the former, increased rapidly in this muscle, so the reason why more ammonia yielded in the fish muscle of death in agony than in instant death was considered to depend upon deamination or glutamine immediatly after the catch and desamination of adenylic acid during the autolytic process.
No takes yet. Share an insight, caveat, or question.
Fujimaki et al. (1953) studied this question.