Validating the NAAIC alfalfa grazing tolerance standard test and assessing physiological responses to grazing in a tropical environment

Crop Science ◽  
2020 ◽  
Vol 60 (3) ◽  
pp. 1702-1710
Author(s):  
Carlos G. S. Pedreira ◽  
Valdson J. Silva ◽  
Maria D. C. Ferragine ◽  
Joseph H. Bouton ◽  
Felipe Tonato ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Standard Test ◽  
Tropical Environment ◽  
Grazing Tolerance

Comparison of Two Tests to Determine the Maximal Aerobic Speed

2020 ◽  
Vol 60 (2) ◽  
pp. 252-262
Author(s):  
Benhammou Saddek ◽  
Jérémy B.J. Coquart ◽  
Laurent Mourot ◽  
Belkadi Adel ◽  
Mokkedes Moulay Idriss ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Intraclass Correlation ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Random Order ◽  
Standard Test ◽  
Maximal Heart Rate ◽  
Distance Runners ◽  
Gold Standard Test ◽  
Maximal Aerobic Speed

SummaryThe aims of this study were (a): to compare maximal physiological responses (maximal heart rate: HRmax and blood lactate concentration: [La-]) and maximal aerobic speed (MAS) achieved during a gold standard test (T-VAM) to those during a new test entitled: the 150-50 Intermittent Test (150-50IT), and (b): to test the reliability of the 150-50IT. Eighteen middle-distance runners performed, in a random order, the T-VAM and the 150-50IT. Moreover, the runners performed a second 150-50IT (retest). The results of this study showed that the MAS obtained during 150-50IT were significantly higher than the MAS during the T-VAM (19.1 ± 0.9 vs. 17.9 ± 0.9 km.h−1, p < 0.001). There was also significant higher values in HRmax (193 ± 4 vs. 191 ± 2 bpm, p = 0.011), [La-] (11.4 ± 0.4 vs. 11.0 ± 0.5 mmol.L−1, p = 0.039) during the 150-50IT. Nevertheless, significant correlations were noted for MAS (r = 0.71, p = 0.001) and HRmax (r = 0.63, p = 0.007). MAS obtained during the first 150-50IT and the retest were not significantly different (p = 0.76) and were significantly correlated (r = 0.94, p < 0.001, intraclass correlation coefficient = 0.93 and coefficient of variation = 6.8 %). In conclusion, the 150-50IT is highly reproducible, but the maximal physiological responses derived from both tests cannot be interchangeable in the design of training programs.

Physiological responses and thermal equilibrium of Jersey dairy cows in tropical environment

2019 ◽  
Vol 63 (11) ◽  
pp. 1487-1496 ◽  
Author(s):  
Sheila Tavares Nascimento ◽  
Alex Sandro Campos Maia ◽  
Vinícius de França Carvalho Fonsêca ◽  
Carolina Cardoso Nagib Nascimento ◽  
Marcos Davi de Carvalho ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Thermal Equilibrium ◽  
Physiological Responses ◽  
Tropical Environment

scholarly journals Comparison of Two Tests to Determine the Maximal Aerobic Speed

2020 ◽  
Vol 60 (2) ◽  
pp. 241-251
Author(s):  
Benhammou Saddek ◽  
Jérémy B.J. Coquart ◽  
Laurent Mourot ◽  
Belkadi Adel ◽  
Mokkedes Moulay Idriss ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Intraclass Correlation ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Random Order ◽  
Standard Test ◽  
Maximal Heart Rate ◽  
Distance Runners ◽  
Gold Standard Test ◽  
Maximal Aerobic Speed

SummaryThe aims of this study were (a): to compare maximal physiological responses (maximal heart rate: HRmax and blood lactate concentration: [La-]) and maximal aerobic speed (MAS) achieved during a gold standard test (T-VAM) to those during a new test entitled: the 150-50 Intermittent Test (150-50IT), and (b): to test the reliability of the 150-50IT. Eighteen middle-distance runners performed, in a random order, the T-VAM and the 150-50IT. Moreover, the runners performed a second 150-50IT (retest). The results of this study showed that the MAS obtained during 150-50IT were significantly higher than the MAS during the T-VAM (19.1 ± 0.9 vs. 17.9 ± 0.9 km.h−1, p < 0.001). There was also significant higher values in HRmax (193 ± 4 vs. 191 ± 2 bpm, p = 0.011), [La-] (11.4 ± 0.4 vs. 11.0 ± 0.5 mmol.L−1, p = 0.039) during the 150-50IT. Nevertheless, significant correlations were noted for MAS (r = 0.71, p = 0.001) and HRmax (r = 0.63, p = 0.007). MAS obtained during the first 150-50IT and the retest were not significantly different (p = 0.76) and were significantly correlated (r = 0.94, p < 0.001, intraclass correlation coefficient = 0.93 and coefficient of variation = 6.8 %). In conclusion, the 150-50IT is highly reproducible, but the maximal physiological responses derived from both tests cannot be interchangeable in the design of training programs.

Effect of time of day and type of shading on the physiological responses of crossbred calves in tropical environment

2013 ◽  
Vol 1 (1) ◽  
pp. 7-12 ◽  
Author(s):  
P.O. Lima ◽  
J.B.F. Souza Jr ◽  
R.N. Lima ◽  
F.C.S. Oliveira ◽  
H.G.T. Domingos ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Time Of Day ◽  
Tropical Environment

Effect of water restriction on physiological responses and certain reproductive traits of Malpura ewes in a semiarid tropical environment

2016 ◽  
Vol 12 ◽  
pp. 54-59 ◽  
Author(s):  
Davendra Kumar ◽  
Kalyan De ◽  
Anoop Kumar Singh ◽  
Kamal Kumar ◽  
Artabandhu Sahoo ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Reproductive Traits ◽  
Tropical Environment ◽  
Water Restriction ◽  
Effect Of Water

Development and evaluation of grazing-tolerant alfalfa cultivars: A review

2000 ◽  
Vol 80 (3) ◽  
pp. 503-512 ◽  
Author(s):  
S. R. Smith Jr. ◽  
J. H. Bouton ◽  
A. Singh ◽  
W. P. McCaughey
Keyword(s):  
Medicago Sativa ◽  
Selection Procedure ◽  
Standard Test ◽  
Grazing Management ◽  
Management Systems ◽  
Test Protocol ◽  
Grazing Tolerance ◽  
Breeding Populations ◽  
The Usa ◽  
High Yields

Plant breeders have long sought to improve grazing tolerance of alfalfa without sacrificing the beneficial yield and quality attributes of this species. Most efforts have focussed on selecting for traits (e.g., creeping rootedness) related to grazing tolerance and/or simulated grazing, but these efforts failed to account for the multiple stresses caused by grazing animals. Trait selection often led to sacrifices in yield and other desirable characteristics resulting in cultivars that were not robust across grazing management systems and environments. An innovative selection procedure was recently developed at the University of Georgia which incorporated intensive grazing with continuous stocking by beef cattle. The development of "Alfagraze" using this procedure showed that grazing tolerance and high yields can be incorporated into the same cultivar, along with consistent performance across grazing management systems and environments. Subsequent research has shown that grazing tolerance can be improved within elite, high-yielding, multiple-pest-resistant cultivars and breeding populations. Selection using intensive grazing with continuous stocking has been summarised in a "Standard Test Protocol" that is now being successfully used by public and private alfalfa breeders and in cultivar evaluation programs in the USA, Canada, and other countries. Key words: Medicago sativa, Medicago sativa ssp. falcata, persistence, lucerne, grazing tolerance, Alfagraze

Seasonal rhythmicity of thermoregulatory physiological responses in fat-rumped sheep under semi-arid tropical environment

2018 ◽  
Vol 50 (6) ◽  
pp. 949-956
Author(s):  
Arpita Mohapatra ◽  
Kalyan De ◽  
Davendra Kumar ◽  
S. M. K. Naqvi ◽  
Raghvendar Singh
Keyword(s):  
Physiological Responses ◽  
Tropical Environment ◽  
Seasonal Rhythmicity ◽  
Semi Arid

Misophonia: An Evidence-Based Case Report

2020 ◽  
Vol 29 (4) ◽  
pp. 685-690
Author(s):  
C. S. Vanaja ◽  
Miriam Soni Abigail
Keyword(s):  
Quality Of Life ◽  
Case Report ◽  
Case History ◽  
Pure Tone ◽  
Physiological Responses ◽  
Evidence Based ◽  
Management Option ◽  
Pure Tone Audiogram

Purpose Misophonia is a sound tolerance disorder condition in certain sounds that trigger intense emotional or physiological responses. While some persons may experience misophonia, a few patients suffer from misophonia. However, there is a dearth of literature on audiological assessment and management of persons with misophonia. The purpose of this report is to discuss the assessment of misophonia and highlight the management option that helped a patient with misophonia. Method A case study of a 26-year-old woman with the complaint of decreased tolerance to specific sounds affecting quality of life is reported. Audiological assessment differentiated misophonia from hyperacusis. Management included retraining counseling as well as desensitization and habituation therapy based on the principles described by P. J. Jastreboff and Jastreboff (2014). A misophonia questionnaire was administered at regular intervals to monitor the effectiveness of therapy. Results A detailed case history and audiological evaluations including pure-tone audiogram and Johnson Hyperacusis Index revealed the presence of misophonia. The patient benefitted from intervention, and the scores of the misophonia questionnaire indicated a decrease in the severity of the problem. Conclusions It is important to differentially diagnose misophonia and hyperacusis in persons with sound tolerance disorders. Retraining counseling as well as desensitization and habituation therapy can help patients who suffer from misophonia.

Physiological Responses of Spider Phobics and Nonphobics to Viewing Slides

2002 ◽  
Author(s):  
Rebecca L. Stump ◽  
Judith C. Conger ◽  
Scott Vrana
Keyword(s):  
Physiological Responses
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