Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago

For nine days, the number of sally lightfoot crabs (Grapsus grapsus) in a 300 m² area within the brown booby (Sula leucogaster) colony and the activity of each crab were recorded in the morning (5:30-7:30 h), at midday (11:30-13:30 h), and in the afternoon (15:30-17:30 h). The average number of indi...

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Autores principales:	Gianuca,Dimas, Vooren,Carolus Maria
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2007
Materias:	Sao Pedro and Sao Paulo Archipelago Sula leucogaster Grapsus grapsus Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200012
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spelling	oai:scielo:S0717-717820070002000122008-01-31Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo ArchipelagoGianuca,DimasVooren,Carolus Maria Sao Pedro and Sao Paulo Archipelago Sula leucogaster Grapsus grapsus Brazil For nine days, the number of sally lightfoot crabs (Grapsus grapsus) in a 300 m² area within the brown booby (Sula leucogaster) colony and the activity of each crab were recorded in the morning (5:30-7:30 h), at midday (11:30-13:30 h), and in the afternoon (15:30-17:30 h). The average number of individuals was 80.2 ±15.5 (59-111) in the morning, 3.1 ± 2.3 (0-7) at midday, and 65.3 ± 15 (49-92) in the afternoon. A total of 1338 activity records were made, with the crabs standing still or walking in 844 records and handling material or feeding in 494 records. In the latter records, 53% of the crabs were handling detritus (pieces of dry bird excrement and sediment), 12.2% were handling feathers, 12.8% were feeding on regurgitated fish, 8.9% were feeding on dead Sula leucogaster, 8.1% were feeding on crab, 4.7% were feeding on material adhered to egg shells, and 0.6% were feeding on live nestlings of S. leucogaster. The low frequency of crabs in the colony around noon shows that the crabs avoid insolation, hiding in shady places and tidal pools. In the Sao Pedro and Sao Paulo Archipelago, the presence of S. leucogaster represents an important food source for G. grapsus. This crab plays the role of a cleaner in the S. leucogaster colony, consuming food remains, broken eggs, and dead birdsinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.35 n.2 20072007-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200012en10.4067/S0717-71782007000200012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Sao Pedro and Sao Paulo Archipelago Sula leucogaster Grapsus grapsus Brazil
spellingShingle	Sao Pedro and Sao Paulo Archipelago Sula leucogaster Grapsus grapsus Brazil Gianuca,Dimas Vooren,Carolus Maria Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
description	For nine days, the number of sally lightfoot crabs (Grapsus grapsus) in a 300 m² area within the brown booby (Sula leucogaster) colony and the activity of each crab were recorded in the morning (5:30-7:30 h), at midday (11:30-13:30 h), and in the afternoon (15:30-17:30 h). The average number of individuals was 80.2 ±15.5 (59-111) in the morning, 3.1 ± 2.3 (0-7) at midday, and 65.3 ± 15 (49-92) in the afternoon. A total of 1338 activity records were made, with the crabs standing still or walking in 844 records and handling material or feeding in 494 records. In the latter records, 53% of the crabs were handling detritus (pieces of dry bird excrement and sediment), 12.2% were handling feathers, 12.8% were feeding on regurgitated fish, 8.9% were feeding on dead Sula leucogaster, 8.1% were feeding on crab, 4.7% were feeding on material adhered to egg shells, and 0.6% were feeding on live nestlings of S. leucogaster. The low frequency of crabs in the colony around noon shows that the crabs avoid insolation, hiding in shady places and tidal pools. In the Sao Pedro and Sao Paulo Archipelago, the presence of S. leucogaster represents an important food source for G. grapsus. This crab plays the role of a cleaner in the S. leucogaster colony, consuming food remains, broken eggs, and dead birds
author	Gianuca,Dimas Vooren,Carolus Maria
author_facet	Gianuca,Dimas Vooren,Carolus Maria
author_sort	Gianuca,Dimas
title	Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
title_short	Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
title_full	Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
title_fullStr	Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
title_full_unstemmed	Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago
title_sort	abundance and behavior of the sally lightfoot crab (grapsus grapsus) in the colony of the brown booby (sula leucogaster) in the sao pedro and sao paulo archipelago
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200012
work_keys_str_mv	AT gianucadimas abundanceandbehaviorofthesallylightfootcrabgrapsusgrapsusinthecolonyofthebrownboobysulaleucogasterinthesaopedroandsaopauloarchipelago AT voorencarolusmaria abundanceandbehaviorofthesallylightfootcrabgrapsusgrapsusinthecolonyofthebrownboobysulaleucogasterinthesaopedroandsaopauloarchipelago
_version_	1718442958839087104

Abundance and behavior of the sally lightfoot crab (Grapsus grapsus) in the colony of the brown booby (Sula leucogaster) in the Sao Pedro and Sao Paulo Archipelago

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