Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh

Neohelice granulata inhabits estuarine and protected coastal areas in temperate regions and is the most dominant decapod crustacean in the Bahía Blanca Estuary, Argentina. The population structure was studied during a year in a SW Atlantic salt marsh located in the Bahía Blanca Estuary. Crabs were s...

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Autores principales:	Angeletti,Sabrina, Cervellini,Patricia M
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2015
Materias:	Neohelice granulata crabs population structure salt marsh estuary southwestern Atlantic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000300015
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spelling	oai:scielo:S0718-560X20150003000152015-09-29Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marshAngeletti,SabrinaCervellini,Patricia M Neohelice granulata crabs population structure salt marsh estuary southwestern Atlantic Neohelice granulata inhabits estuarine and protected coastal areas in temperate regions and is the most dominant decapod crustacean in the Bahía Blanca Estuary, Argentina. The population structure was studied during a year in a SW Atlantic salt marsh located in the Bahía Blanca Estuary. Crabs were sampled monthly from August 2010 to July 2011. The maximum observed density was 30 crabs m-2 in February and 70 burrows m-2 in May. The maximum carapace width (CW) was 32 and 27.5 mm in males and females respectively. Medium size crabs were between 16 and 20 mm CW. Significantly smaller sized crabs were observed at the lower intertidal regions (P < 0.05). The sex ratio was favorable for males and was significantly different from the expected 1:1 (P < 0.05). The recruitment of unsexed juveniles crabs (CW <6.5 mm) was observed throughout the year and the presence of ovigerous females from October to February indicated seasonal reproduction. The average size of ovigerous females was CW = 20.8 mm and the smallest ovigerous female measured was 16 mm CW. For the first time, the population structure of the most important macro-invertebrate is analyzed in the Bahía Blanca Estuary. This study may help to make decisions in the area, where anthropic action is progressing day by day.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.43 n.3 20152015-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000300015en10.3856/vol43-issue3-fulltext-15
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Neohelice granulata crabs population structure salt marsh estuary southwestern Atlantic
spellingShingle	Neohelice granulata crabs population structure salt marsh estuary southwestern Atlantic Angeletti,Sabrina Cervellini,Patricia M Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
description	Neohelice granulata inhabits estuarine and protected coastal areas in temperate regions and is the most dominant decapod crustacean in the Bahía Blanca Estuary, Argentina. The population structure was studied during a year in a SW Atlantic salt marsh located in the Bahía Blanca Estuary. Crabs were sampled monthly from August 2010 to July 2011. The maximum observed density was 30 crabs m-2 in February and 70 burrows m-2 in May. The maximum carapace width (CW) was 32 and 27.5 mm in males and females respectively. Medium size crabs were between 16 and 20 mm CW. Significantly smaller sized crabs were observed at the lower intertidal regions (P < 0.05). The sex ratio was favorable for males and was significantly different from the expected 1:1 (P < 0.05). The recruitment of unsexed juveniles crabs (CW <6.5 mm) was observed throughout the year and the presence of ovigerous females from October to February indicated seasonal reproduction. The average size of ovigerous females was CW = 20.8 mm and the smallest ovigerous female measured was 16 mm CW. For the first time, the population structure of the most important macro-invertebrate is analyzed in the Bahía Blanca Estuary. This study may help to make decisions in the area, where anthropic action is progressing day by day.
author	Angeletti,Sabrina Cervellini,Patricia M
author_facet	Angeletti,Sabrina Cervellini,Patricia M
author_sort	Angeletti,Sabrina
title	Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
title_short	Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
title_full	Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
title_fullStr	Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
title_full_unstemmed	Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh
title_sort	population structure of the burrowing crab neohelice granulata (brachyura, varunidae) in a southwestern atlantic salt marsh
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000300015
work_keys_str_mv	AT angelettisabrina populationstructureoftheburrowingcrabneohelicegranulatabrachyuravarunidaeinasouthwesternatlanticsaltmarsh AT cervellinipatriciam populationstructureoftheburrowingcrabneohelicegranulatabrachyuravarunidaeinasouthwesternatlanticsaltmarsh
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Population structure of the burrowing crab Neohelice granulata (Brachyura, Varunidae) in a southwestern Atlantic salt marsh

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