A Possible Function of the Fibrillar Coat in \u3ci\u3eAcanthocephalus jacksoni\u3c/i\u3e Eggs

Discusses a possible function of the fibrillar coat in Acanthocephalus jacksoni eggs

AUTONOMIC CONTROL OF HEART RATE AFTER EXERCISE IN TRAINED WRESTLERS

The objective of this study was to establish differences in vagal reactivation, through heart rate recovery and heart rate variability post exercise, in Brazilian jiu-jitsu wrestlers (BJJW). A total of 18 male athletes were evaluated, ten highly trained (HT) and eight moderately trained (MT), who performed a maximum incremental test. At the end of the exercise, the R-R intervals were recorded during the first minute of recovery. We calculated heart rate recovery (HRR60s), and performed linear and non-linear (standard deviation of instantaneous beat-to-beat R-R interval variability – SD1) analysis of heart rate variability (HRV), using the tachogram of the first minute of recovery divided into four segments of 15 s each (0-15 s, 15-30 s, 30-45 s, 45-60 s). Between HT and MT individuals, there were statistically significant differences in HRR60s (p <0.05) and in the non linear analysis of HRV from SD130-45s (p <0.05) and SD145-60s (p <0.05). The results of this research suggest that heart rate kinetics during the first minute after exercise are related to training level and can be used as an index for autonomic cardiovascular control in BJJW

\u3ci\u3ePaulisentis missouriensis\u3c/i\u3e Keppner, 1974 (Acanthocephala) in Creek Chubs, \u3ci\u3eSemotilus atromaculatus\u3c/i\u3e, of Southeastern Nebraska

Occurrence of the acanthocephalan Paulisentis missouriensis Keppner, 1974, in Semotilus atromaculatus of Richardson County, Nebraska, was monitored from September 1974 through July 1975. Six hundred nineteen fish were examined of which 78% were infected with 1 to 32 worms. A relatively high prevalence of infection, 72% to 81%, was noted throughout the study. There was no significant difference in the mean density of parasites between the months. Overall mean density was 4.0 (2.9 to 4.6). Fish of all lengths (35 mm to 215 mm standard length) were infected. Both prevalence and mean density increased as fish age/length increased. There were consistently fewer male worms than female worms. The number of males to females best fit a 2:3 ratio as verified by a Chi-square test. Worms appeared to live slightly more than one year with recruitment occurring in early summer and old worms disappearing from the population late the following summer