Spatial patterns in army ant foraging and migration: Eciton burchelli on Barro Colorado Island, Panama

Franks, Nigel R.; Fletcher, C. R.

doi:10.1007/bf00302894

Cited by 111 publications

(147 citation statements)

References 24 publications

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“…These "exploratory swarms" are also remarkably similar to army ant-type foraging swarms (Rettenmeyer, 1963;Schneirla, 1940Schneirla, , 1971Topoff, 1972;Moffet, 1984Moffet, , 1988Franks and Fletcher, 1983), albeit on a much smaller scale. The similarity is seen both at the individual and the collective level, and the same basic model may be used for both .…”

Section: Discussionmentioning

confidence: 67%

The self-organizing exploratory pattern of the argentine ant

et al. 1990

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Section: Discussionmentioning

confidence: 67%

The self-organizing exploratory pattern of the argentine ant

et al. 1990

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“…In addition, the probability of reciprocal tolerance can depend on the frequency with which individuals meet (Krams et al 2008), which should be higher for birds that hold adjacent dominance areas. Tolerance of adjacent neighbours could be reciprocated on a regular basis because swarms of E. burchellii very probably occur in the roosting areas of each individual with similar probability because of the unpredictable wide-ranging movements of the ants (Franks & Fletcher 1983).…”

Section: Discussion (A) Local Dominancementioning

confidence: 99%

The effect of local dominance and reciprocal tolerance on feeding aggregations of ocellated antbirds

et al. 2009

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We studied ocellated antbirds (Phaenostictus mcleannani ) to test the hypothesis that reciprocal tolerance between dominant individuals can favour feeding in aggregations. Mated pairs hold large non-exclusive feeding ranges, but roost and nest in a small portion of this range ('roosting area'); adjacent roosting neighbours are unrelated. Ocellated antbirds congregate to feed on arthropods fleeing from nomadic swarms of army ants that move across the ranges of many pairs. We used playback experiments to simulate acoustic challenges, and results showed that males responded aggressively to other males only in their roosting areas. Responses to adjacent neighbours were less aggressive than to non-neighbours (i.e. the 'dear enemy' effect). Prey intake rates were higher when birds fed in their own roosting area or in that of adjacent neighbours compared with more distant sites. Males tolerated adjacent neighbours at swarm fronts where prey are most dense, but more distant neighbours were displaced. Despite small samples for some analyses, our results suggest that reciprocal tolerance between adjacent unrelated neighbours can ameliorate intraspecific competition within ephemeral feeding aggregations.

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“…This ¢xes the distance a colony moves and is roughly equal to 530 m, the direct overland distance between successive statary bivouacs (Willis 1967;Franks & Fletcher 1983). Hence, a colony can move from one square to any of the eight adjacent cells.…”

Section: Each Colony Chooses To Move To Any Of the 24 Patchesmentioning

confidence: 99%

Habitat fragmentation, percolation theory and the conservation of a keystone species

Boswell

Britton

Franks

1998

Proc. R. Soc. Lond. B

122

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Many species survive in specialized habitats. When these habitats are destroyed or fragmented the threat of extinction looms. In this paper, we use percolation theory to consider how an environment may fragment. We then develop a stochastic, spatially explicit, individual-based model to consider the e¡ect of habitat fragmentation on a keystone species (the army ant Eciton burchelli ) in a neotropical rainforest. The results suggest that species may become extinct even in huge reserves before their habitat is fully fragmented; this has important implications for conservation. We show that sustainable forest-harvesting strategies may not be as successful as is currently thought. We also suggest that habitat corridors, once thought of as the saviour for fragmented environments, may have a detrimental e¡ect on population persistence.

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Spatial patterns in army ant foraging and migration: Eciton burchelli on Barro Colorado Island, Panama

Cited by 111 publications

References 24 publications

The self-organizing exploratory pattern of the argentine ant

The self-organizing exploratory pattern of the argentine ant

The effect of local dominance and reciprocal tolerance on feeding aggregations of ocellated antbirds

Habitat fragmentation, percolation theory and the conservation of a keystone species

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