[Quantitative changes in the capillary supply of selected muscles of turkeys, ducks, rats and swine during postnatal development]. / Quantitative Veränderungen in der Kapillarisierung ausgewählter Muskeln von Pute, Ente, Ratte und Schwein während der postnatalen Entwicklung.

The capillary and muscle fibre density, the ratio of capillaries to fibres and the mean diffusion distance were determined in histological cross sections of the M. pectoralis of turkeys and ducks, the M. semitendinosus of rats and the M. longissimus of pigs between hatching or birth and maturity. The data were analyzed by fitting the Janoschek growth curve. The capillary and fibre density decrease asymptomatically, the diffusion distance increases. The M. longissimus of the adult pig is provided with the lowest capillary density resulting in the greatest diffusion distance. The highest capillarity was found in the M. pectoralis of ducks.

[The capillarization of the M. pectoralis of the turkey (Meleagris gallopavo) from hatching to the 280th day of life]. / Die Kapillarisierung des M. pectoralis der Pute (Meleagris gallopavo) vom Schlupf bis zum 280. Lebenstag.

The capillarization of the M. pectoralis was examined in the turkey as it changed with age. Examined was the density of the muscles fibers (per mm2), the density of the capillaries (per mm2) and the quotient muscle fibers/capillaries. In accordance with the sequence of the original data four functions of organismic growth (slightly altered) were utilized for the approximation of the data for descending amounts: Pütter/Bertalanffy (1920, 1934); Richards (1959); Janoschek enlarged after Sager (1980) and Richards enlarged after Sager (1980). The approximations were made via nonlinear regressions, whereby the sum of the error amounts and the sums of the error squares served as criteria of quality. The results including the deduced initial and end amounts are combined in tables which also contain the parameter of the way the computations were conducted.