Home Range, Social Behavior, and Dominance Relationships in the African Unstriped Ground Squirrel, Xerus rutilus

1976 ◽  
Vol 57 (3) ◽  
pp. 450-460 ◽  
Author(s):  
T. J. O'Shea
Keyword(s):  
Social Behavior ◽  
Home Range ◽  
Ground Squirrel ◽  
Dominance Relationships

Effects of food and predators on the home-range sizes of Arctic ground squirrel (Spermophilus parryii)

1998 ◽  
Vol 76 (3) ◽  
pp. 592-596 ◽  
Author(s):  
Anne H Hubbs ◽  
Rudy Boonstra
Keyword(s):  
Home Range ◽  
Ground Squirrel ◽  
Large Scale ◽  
Yukon Territory ◽  
Ground Squirrels ◽  
Home Ranges ◽  
Spermophilus Parryii ◽  
Mammalian Predators ◽  
Core Areas ◽  
Arctic Ground Squirrels

We used radiotelemetry to study the effects of food addition and predator reduction on the home-range sizes of adult Arctic ground squirrels (Spermophilus parryii) on large-scale experimental grids in the boreal forest of the southwestern Yukon Territory. Home ranges were 2-7 times smaller on food-supplemented grids than on nonsupplemented grids, regardless of whether large mammalian predators were present. Similarly, core areas (where 50% of activities occur) were 8-11 times smaller on food-supplemented grids. Food availability rather than predator presence primarily determined the sizes of home ranges and core areas of Arctic ground squirrels.

scholarly journals HOME RANGE AND SOCIAL BEHAVIOR OF THE ENDANGERED TEHUANTEPEC JACKRABBIT (LEPUS FLAVIGULARIS) IN OAXACA, MEXICO

2006 ◽  
Vol 87 (4) ◽  
pp. 748-756 ◽  
Author(s):  
Verónica Farías ◽  
Todd K. Fuller ◽  
Fernando A. Cervantes ◽  
Consuelo Lorenzo
Keyword(s):  
Social Behavior ◽  
Home Range ◽  
Lepus Flavigularis

PSV-16 Validation of an algorithm to assess feedbunk replacement events in beef cattle using an electronic feeding system

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 302-303
Author(s):  
Keara O’Reilly ◽  
Gordon Carstens ◽  
Borbala Foris ◽  
Courtney L Daigle
Keyword(s):  
Social Behavior ◽  
Beef Cattle ◽  
Rank Correlation ◽  
Well Being ◽  
Beef Steers ◽  
Feeding System ◽  
Competition Index ◽  
Dominance Relationships ◽  
Using Data ◽  
Grower Diet

Abstract Visual observations of social behavior and dominance relationships in cattle have been used to examine associations with productivity and well-being. This method is time consuming limiting the number of animals that can be evaluated. The objective of this study was to validate an algorithm to quantify feedbunk replacement events using data from an electronic feeding system. Crossbred beef steers (n = 20) fed a grower diet were housed in 1 of 2 pens each equipped with 3 electronic feedbunks (GrowSafe Systems) and video recorders. A trained video observer recorded all feedbunk replacement events and other agonistic activities at the feedbunk over a 4-d period (24 h/d). The electronic feeding system recorded the start and end timestamps of bunk visit (BV) events for each animal. An algorithm was developed to determine BV events deemed to be replacement events, defined as a BV event when an actor animal displaced a reactor animal from the feedbunk and occupied the same feeder within a specified period of time (replacement criterion). We calculated the recall and precision corresponding to replacement criterions from 1 to 60 s, and the optimum replacement criterion was determined to be between 18 and 20 s. The recall, precision and F-score of the algorithm using this replacement criterion were high (on average > 0.75). Furthermore, a replacement competition index was computed as a proxy for competitive feedbunk behavior, calculated as the number of actor-initiated replacement events divided by the total number of replacement events for each steer. Using Spearmans rank correlation we found high correlations (r > 0.7; P < 0.05) between the electronic and observed indices. These preliminary results demonstrate the potential of the GrowSafe system to quantify feedbunk replacement events for confined beef cattle, providing opportunities to evaluate associations between competitive feedbunk behavior and economically relevant traits.

The Social System of the Grey Squirrel

Behaviour ◽  
1978 ◽  
Vol 64 (3-4) ◽  
pp. 305-328 ◽  
Author(s):  
D.C. Thompson
Keyword(s):  
Home Range ◽  
Social System ◽  
Population Regulation ◽  
Individual Recognition ◽  
Home Ranges ◽  
Sciurus Carolinensis ◽  
Grey Squirrel ◽  
Dominance Relationships ◽  
The Social ◽  
Males And Females

AbstractThe social system of the grey squirrel (Sciurus carolinensis) was investigated. The area used by males and females expands after weaning, then stabilizes and remains the same in location and extent for life. The home range of an established individual is broadly overlapped by the home ranges of several other animals. Each established individual is regularly in contact with only a limited number of recognized neighbours with which it has well-established dominance relationships. Individual recognition promotes lowered aggressive levels between neighbours which allows each squirrel to use its entire home range evenly. Aggressive behaviour is directed toward strange squirrels, either young or immigrants, which attempt to enter this system. Thus, the established individuals hinder the settlement of new animals. Young squirrels born in a given locality have a greater chance of establishing than do immigrants. The relevance of the findings to population regulation is discussed.

Sign in / Sign up

Export Citation Format

Share Document