Group foraging, patch exploitation time and the finder's advantage

1997 ◽  
Vol 40 (1) ◽  
pp. 35-39 ◽  
Author(s):  
Hannu Rita ◽  
E. Ranta ◽  
Nina Peuhkuri
Keyword(s):  
Group Foraging ◽  
Patch Exploitation

Patch exploitation, group foraging, and unequal competitors

1995 ◽  
Vol 6 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Esa Ranta ◽  
Hannu Rita ◽  
Nina Peuhkuri
Keyword(s):  
Group Foraging ◽  
Unequal Competitors ◽  
Patch Exploitation

Flock size and formation in black-billed gulls

1982 ◽  
Vol 60 (8) ◽  
pp. 1806-1811 ◽  
Author(s):  
Roger M. Evans
Keyword(s):  
Size Distribution ◽  
Causal Model ◽  
Causal Explanation ◽  
Flock Size ◽  
Group Foraging ◽  
Foraging Site ◽  
Site Tenacity

Black-billed gulls (Larus bulleri) depart form breeding colonies and foraging sites in nonrandom, clumped formations (flocks). Flocks leaving colonies were significantly smaller than those leaving foraging sites, in part owing to more "upflights" at foraging sites. When more birds left a colony per unit time, flocks were both larger and more frequent.A causal model was developed based on the assumptions that flock departures from a colony or foraging site result from the effects of social attractions superimposed on otherwise random departure intervals. This model successfully predicted the size distribution of flocks departing from four colonies and foraging sites. In conjunction with the concepts of site tenacity and habituation, the model also permits a causal explanation of differences in the size of flocks departing colonies compared with foraging sites, and of size differences in flocks arising from "upflights" as opposed to the more common "straggling" columnar formations. The model and results are consistent with the hypothesis that colonies function as assembly points that facilitate group foraging.

COMPARATIVE STUDIES ON THE BEHAVIOR OF THREE SPECIES OF ANTS (HYMENOPTERA: FORMICIDAE): II. TRAIL FORMATION AND GROUP FORAGING

1969 ◽  
Vol 101 (2) ◽  
pp. 118-128 ◽  
Author(s):  
G. L. Ayre
Keyword(s):  
Comparative Studies ◽  
Food Source ◽  
Group Foraging ◽  
Trail Pheromones ◽  
Laboratory Conditions ◽  
Trail Formation ◽  
Group Travel

AbstractMethods of trail formation and organization of group foraging by the ants Formica obscuriventris Mayr, Myrmica americana Weber, and Crematogaster lineolata (Say) were studied under laboratory conditions. Each species was able to organize group travel to a persistent food source. M. americana and C. lineolata achieved this by using trail pheromones, the former species using these pheromones only to establish the trail and the latter using them in all stages of foraging. F. obscuriventris apparently did not use trail pheromones and each individual learned the route to the food independently.

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