A dung beetle that path integrates without the use of landmarks

Marie Dacke, Basil el Jundi, Yakir Gagnon, Ayse Yilmaz, Marcus Byrne, Emily Baird

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

8 Citeringar (SciVal)

Sammanfattning

Unusual amongst dung beetles, Scarabaeus galenus digs a burrow that it provisions by making repeated trips to a nearby dung pile. Even more remarkable is that these beetles return home moving backwards, with a pellet of dung between their hind legs. Here, we explore the strategy that S. galenus uses to find its way home. We find that, like many other insects, they use path integration to calculate the direction and distance to their home. If they fail to locate their burrow, the beetles initiate a distinct looping search behaviour that starts with a characteristic sharp turn, we have called a ‘turning point’. When homing beetles are passively displaced or transferred to an unfamiliar environment, they initiate a search at a point very close to the location of their fictive burrow—that is, a spot at the same relative distance and direction from the pick-up point as the original burrow. Unlike other insects, S. galenus do not appear to supplement estimates of the burrow location with landmark information. Thus, S. galenus represents a rare case of a consistently backward-homing animal that does not use landmarks to augment its path integration strategy.

Originalspråkengelska
Sidor (från-till)1161-1175
Antal sidor15
TidskriftAnimal Cognition
Volym23
Nummer6
Tidigt onlinedatum2020
DOI
StatusPublished - 2020 nov.

Ämnesklassifikation (UKÄ)

  • Zoologi

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