Influence of interposition of pink muscle fiber into dorsal ordinary muscle on increasing rate of K-value in various fish species
Year: 2001
Type: article
Abstract: Twenty-seven fish species from the Sakishima Islands and Nagasaki living in water temperatures of 28∞C (12 fish species) and 17∞C (15 fish species), respectively, were used as sample fishes.Postmortem temporal changes of K-values were measured at 1-h intervals in the dorsal ordinary muscle of each fish, of which the remaining body was then kept in water at a controlled temperature of 32∞C.The increasing rate of K-value at 32∞C (DK 32 ) was calculated from the regression line formed from the relationship between the kept time and the K-value.Muscle fiber types were differentiated by the stability of actomyosin ATPase preincubated in either acid or alkaline conditions.DK 32 varied widely according to fish species, ranging from 0.98%/h to 14.00%/h.Although the mean value of each body of water was somewhat higher for fishes from Nagasaki at 17°C than in fishes from Sakishima Islands at 28°C, the difference was not significant.The interposition percentage of pink muscle fibers into the dorsal ordinary muscle was also distributed widely, ranging from 0% to 56.53% in number and from 0% to 53.68% in area.A significant correlation was recognized in the relationship between the number or area percentage of pink muscle fibers and deviation percentage of DK 32 for all fish species sampled; r = 0.411 (P < 0.05) for number percentage and r = 0.518 (P < 0.01) for area percentage.These results suggest that the interposition of pink muscle fibers into the dorsal ordinary muscle might accelerate a temporal change of K-value in fish.
Source: Fisheries Science
Institution: Nagasaki University
Language: English
Subfield: Animal Science and Zoology
Domain: Life Sciences
Open Access status: bronze
Funder: University of Arizona
OpenAlex ID: W2150067629