Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).

We investigated the navigational capabilities of the world's largest land-living arthropod, the giant robber crab Birgus latro (Anomura, Coenobitidae); this crab reaches 4 kg in weight and can reach an age of up to 60 years. Populations are distributed over small Indo-Pacific islands of the tro...

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Autores principales:	Jakob Krieger, Ronald Grandy, Michelle M Drew, Susanne Erland, Marcus C Stensmyr, Steffen Harzsch, Bill S Hansson
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fdafd7626a804e8fab55f337f1d77574
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spelling	oai:doaj.org-article:fdafd7626a804e8fab55f337f1d775742021-11-18T08:08:39ZGiant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).1932-620310.1371/journal.pone.0049809https://doaj.org/article/fdafd7626a804e8fab55f337f1d775742012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23166774/?tool=EBIhttps://doaj.org/toc/1932-6203We investigated the navigational capabilities of the world's largest land-living arthropod, the giant robber crab Birgus latro (Anomura, Coenobitidae); this crab reaches 4 kg in weight and can reach an age of up to 60 years. Populations are distributed over small Indo-Pacific islands of the tropics, including Christmas Island (Indian Ocean). Although this species has served as a crustacean model to explore anatomical, physiological, and ecological aspects of terrestrial adaptations, few behavioral analyses of it exist. We used a GPS-based telemetric system to analyze movements of freely roaming robber crabs, the first large-scale study of any arthropod using GPS technology to monitor behavior. Although female robber crabs are known to migrate to the coast for breeding, no such observations have been recorded for male animals. In total, we equipped 55 male robber crabs with GPS tags, successfully recording more than 1,500 crab days of activity, and followed some individual animals for as long as three months. Besides site fidelity with short-distance excursions, our data reveal long-distance movements (several kilometers) between the coast and the inland rainforest. These movements are likely related to mating, saltwater drinking and foraging. The tracking patterns indicate that crabs form route memories. Furthermore, translocation experiments show that robber crabs are capable of homing over large distances. We discuss if the search behavior induced in these experiments suggests path integration as another important navigation strategy.Jakob KriegerRonald GrandyMichelle M DrewSusanne ErlandMarcus C StensmyrSteffen HarzschBill S HanssonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e49809 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jakob Krieger Ronald Grandy Michelle M Drew Susanne Erland Marcus C Stensmyr Steffen Harzsch Bill S Hansson Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
description	We investigated the navigational capabilities of the world's largest land-living arthropod, the giant robber crab Birgus latro (Anomura, Coenobitidae); this crab reaches 4 kg in weight and can reach an age of up to 60 years. Populations are distributed over small Indo-Pacific islands of the tropics, including Christmas Island (Indian Ocean). Although this species has served as a crustacean model to explore anatomical, physiological, and ecological aspects of terrestrial adaptations, few behavioral analyses of it exist. We used a GPS-based telemetric system to analyze movements of freely roaming robber crabs, the first large-scale study of any arthropod using GPS technology to monitor behavior. Although female robber crabs are known to migrate to the coast for breeding, no such observations have been recorded for male animals. In total, we equipped 55 male robber crabs with GPS tags, successfully recording more than 1,500 crab days of activity, and followed some individual animals for as long as three months. Besides site fidelity with short-distance excursions, our data reveal long-distance movements (several kilometers) between the coast and the inland rainforest. These movements are likely related to mating, saltwater drinking and foraging. The tracking patterns indicate that crabs form route memories. Furthermore, translocation experiments show that robber crabs are capable of homing over large distances. We discuss if the search behavior induced in these experiments suggests path integration as another important navigation strategy.
format	article
author	Jakob Krieger Ronald Grandy Michelle M Drew Susanne Erland Marcus C Stensmyr Steffen Harzsch Bill S Hansson
author_facet	Jakob Krieger Ronald Grandy Michelle M Drew Susanne Erland Marcus C Stensmyr Steffen Harzsch Bill S Hansson
author_sort	Jakob Krieger
title	Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
title_short	Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
title_full	Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
title_fullStr	Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
title_full_unstemmed	Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).
title_sort	giant robber crabs monitored from space: gps-based telemetric studies on christmas island (indian ocean).
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/fdafd7626a804e8fab55f337f1d77574
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Giant robber crabs monitored from space: GPS-based telemetric studies on Christmas Island (Indian Ocean).

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