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Artículo

Influence of tidal regime, diurnal phase, habitat and season on feeding of an intertidal crab

Bas, Claudia CristinaIcon ; Lancia, Juan PabloIcon ; Luppi, Tomas AtilioIcon ; Mendez Casariego, Maria AgustinaIcon ; Kittlein, Marcelo JavierIcon ; Spivak, Eduardo DanielIcon
Fecha de publicación: 05/2013
Editorial: Wiley Blackwell Publishing, Inc
Revista: Marine Ecology-pubblicazioni Della Stazione Zoologica Di Napoli I
ISSN: 0173-9565
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

The relationship between diet and feeding activity of intertidal crabs, and environmental cycles (tidal, daily and seasonal), habitat and level of the intertidal zone (high/low) was studied using Neohelice granulata (Brachyura, Varunidae) as a model. This is a semi-terrestrial burrowing crab occupying different habitats in the Southwestern Atlantic coasts and estuaries from bare low intertidal mudflats to high intertidal salt marshes, and from fine, organic matter rich sediment to very coarse sediment with low content of organic matter. The study was carried out in two contrasting habitats of three sites with diverse sets of physical and biological conditions. Diet and feeding of adult N. granulata were indirectly studied through the proportion of food items and the presence/ absence of food in crab stomachs, respectively. This species has a dual mode of feeding: predominantly herbivorous (live plants or plant litter in salt marshes) or deposit feeder (superficial sediment and detritus in mudflats), but the quantity and quality of ingested food varies among habitats and sites. A trend to omnivory (including algae and conspecifics) was detected in relation to low quality of resources. Feeding activity modulated by a complex interaction of factors varied according to spatial and/or temporal changes in some natural cycles. Males and non-ovigerous females fed preferably after dark and during submersion periods, but also after emersion periods if mudflat sediment remained wet; salt marsh crab feeding is somewhat independent of light and tidal cycles. Ovigerous females almost never fed. Both diet and feeding activity of this crab seem to be flexible traits adapted to different combinations of physical and biological factors.
Palabras clave: Feeding Activity , Feeding Mode , Hervibory , Intertidal Crab , Neohelice Granulata , Salt Marshes
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/26027
DOI: http://dx.doi.org/10.1111/maec.12083
URL: http://onlinelibrary.wiley.com/doi/10.1111/maec.12083/abstract
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Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Bas, Claudia Cristina; Lancia, Juan Pablo; Luppi, Tomas Atilio; Mendez Casariego, Maria Agustina; Kittlein, Marcelo Javier; et al.; Influence of tidal regime, diurnal phase, habitat and season on feeding of an intertidal crab; Wiley Blackwell Publishing, Inc; Marine Ecology-pubblicazioni Della Stazione Zoologica Di Napoli I; 35; 3; 5-2013; 319-331
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