Pack formation in cycling and orienteering

Nature ◽  
2001 ◽  
Vol 413 (6852) ◽  
pp. 127-127 ◽  
Author(s):  
G. J. Ackland ◽  
D. Butler
Keyword(s):  
Behaviour ◽  
1972 ◽  
Vol 41 (3-4) ◽  
pp. 298-313 ◽  
Author(s):  
M.W. Fox

AbstractIndividual differences in response to a number of animate and inanimate moving and non-moving stimuli were studied in 18 wolf cubs from four litters. Social rank was closely correlated with reactivity, exploratory behavior and prey-killing ability. A wide range of variability in test scores was found in all litters. It is proposed that pack integration and coordination of activities is enhanced by intra-specific socialization, social facilitation, and leader-follower relationships between subordinates and the more exploratory alpha individual. The evolutionary advantages of selection for individual differences or behavioral polymorphism within litters are discussed and inferences drawn for significance in pack formation. This hypothesis is supported by contrasting evidence of greater behavioral homogeneity in less social canids, where intra-specific aggression and mutual proximity intolerance prevents pack formation and leads to dispersal of the litter.


2005 ◽  
Vol 37 (4) ◽  
pp. 304-306
Author(s):  
L. I. Koroteeva ◽  
A. A. Katina
Keyword(s):  

Behaviour ◽  
2001 ◽  
Vol 138 (11-12) ◽  
pp. 1467-1479 ◽  
Author(s):  
E. Kim McCreery ◽  
Robert Robbins

AbstractAmong the most social of all canids, the endangered African wild dog lives in packs in which the alpha pair typically monopolizes breeding while nonreproductive members help care for the offspring. Consequently, the size of the breeding population is directly related to the number of packs in the population. Although the formation of new packs affects both individual fitness and population dynamics, little is known about the process of pack formation and the proximate factors that influence the outcome. In this paper, seven cases of attempted pack formation are documented, of which four failed. Three possible explanations for pack annulment are considered: group size, mate competition, and mate choice (i.e. group compatibility). Our observations suggest that group compatibility can influence whether stable reproductive units form. The influence of individual behavior, via the process of pack formation, on population dynamics is discussed. The potential conservation application of the theoretical study of wild dog pack formation is highlighted.


2020 ◽  
Vol 15 (10) ◽  
pp. 1369-1376
Author(s):  
Andrew Renfree ◽  
Arturo Casado ◽  
Gonzalo Pellejero ◽  
Brian Hanley

Purpose: To determine different relationships between, and predictive ability of, performance variables at intermediate distances with finishing time in elite male 10,000-m runners. Methods: Official electronic finishing and 100-m split times of the men’s 10,000-m finals at the 2008 and 2016 Olympic Games and IAAF World Championships in 2013 and 2017 were obtained (125 athlete performances in total). Correlations were calculated between finishing times and positions and performance variables related to speed, position, time to the leader, and time to the runner in front at 2000, 4000, 6000, 8000, and 9900 m. Stepwise linear-regression analysis was conducted between finishing times and positions and these variables across the race. One-way analysis of variance was performed to identify differences between intermediate distances. Results: The SD and kurtosis of mean time, skewness of mean time, and position and time difference to the leader were either correlated with or significantly contributed to predictions of finishing time and position at at least one of the analyzed distances (.81 ≥ r ≥ .30 and .001 ≤ P ≤ .03, respectively). These variables also displayed variation across the race (.001 ≤ P ≤ .05). Conclusions: The ability to undertake a high degree of pace variability, mostly characterized by acceleration in the final stages, is strongly associated with achievement of high finishing positions in championship 10,000-m racing. Furthermore, the adoption and maintenance of positions close to the front of the race from the early stages are important to achieve a high finishing position.


2019 ◽  
Vol 49 (1) ◽  
Author(s):  
Courtney J. Marneweck ◽  
Antoine F.J. Marchal ◽  
David G. Marneweck ◽  
Grant Beverley ◽  
Harriet T. Davies-Mostert ◽  
...  

2019 ◽  
Vol 22 (5) ◽  
pp. 493-502 ◽  
Author(s):  
C. Marneweck ◽  
P. A. Becker ◽  
G. Beverley ◽  
H. T. Davies‐Mostert ◽  
C. du Plessis ◽  
...  

Behaviour ◽  
2000 ◽  
Vol 137 (5) ◽  
pp. 579-590 ◽  
Author(s):  
E. Kim McCreery

AbstractPack formation in the African wild dog is a social process that usually involves more than two individuals. Typically, same-sex relatives emigrate and join opposite-sex groups. Same-sex relatives have a shared social history and, consequently, established social bonds. In contrast, opposite-sex groups are unfamiliar with one another. Patterns of association (approaches and resting partners) were recorded during the daily resting period for three newly formed packs. Two packs annulled (Gijima and Amazoro) and one pack (Sinajima) became a stable reproductive unit (i.e. an established pack). An analysis of resting patterns suggests that spatial relationships mirror the relative strength of social bonds and thus the degree of social integration between females and males. Former members of the annulled Gijima pack rested with the same sex more often, and actively maintained this pattern, while opposite-sex associations were observed and maintained more often in the Sinajima pack. The Amazoro pack appeared more integrated than the Gijima pack, but less integrated than the Sinajima pack. Mate choice (i.e. group compatibility) may have influenced the outcome of attempted pack formation. The two cases of pack annulment were not the result of takeovers (i.e. the forceful expulsion of same-sex individuals), and same-sex associations were more common in these packs suggesting that opposite-sex group members were incompatible. The extremely social nature of this canid is reflected in the maintenance of physical contact or relatively short inter-individual distances while resting.


2015 ◽  
Vol 45 (2) ◽  
pp. 215-222 ◽  
Author(s):  
Katherine R. Potgieter ◽  
M. Justin O'Riain ◽  
Harriet T. Davies-Mostert

1999 ◽  
Author(s):  
Jim Weaver ◽  
Matt Blauch ◽  
Mark Parker ◽  
Brad Todd
Keyword(s):  

2005 ◽  
Vol 21 (10) ◽  
pp. 1111-1118 ◽  
Author(s):  
Z. D. Xiang ◽  
S. R. Rose ◽  
P. K. Datta

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