2014
DOI: 10.3989/scimar.04036.02b
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Food manipulation and selection in the omnivorous grapsoid crab <em>Neohelice granulata</em> (Decapoda: Varunidae)

Abstract: Summary:Neohelice granulata is an omnivorous, semi-terrestrial burrowing crab endemic to southwestern Atlantic saltmarshes that behaves as a herbivore when it inhabits vegetated saltmarsh areas or a deposit feeder on bare mudflats. In order to gain insights into how non-specialized crabs manage to rely on low quality diets, we studied in laboratory i) how they use feeding appendages to manipulate the food items commonly eaten (halophytic plant leaves and sediment), and ii) their ability to sort particles when … Show more

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Cited by 4 publications
(3 citation statements)
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“…They eat mainly fresh leaves of halophytic plants (being able to degrade cellulose; [14]) and sediments (and the small organisms contained in it as crustaceans and foraminiferans) [3,14,15]. Both types of food are of low quality, being most of the organic components carbohydrates, with a very small proportion of protein (about 5 % in fresh plants and even lower in sediments, [15]). Therefore, the diet of N. granulata matches well with those described for more strictly herbivorous land crabs reviewed by Linton and Greenaway [17], which adapt their digestive apparatus, metabolism and life cycle to a low nitrogen intake.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…They eat mainly fresh leaves of halophytic plants (being able to degrade cellulose; [14]) and sediments (and the small organisms contained in it as crustaceans and foraminiferans) [3,14,15]. Both types of food are of low quality, being most of the organic components carbohydrates, with a very small proportion of protein (about 5 % in fresh plants and even lower in sediments, [15]). Therefore, the diet of N. granulata matches well with those described for more strictly herbivorous land crabs reviewed by Linton and Greenaway [17], which adapt their digestive apparatus, metabolism and life cycle to a low nitrogen intake.…”
Section: Discussionmentioning
confidence: 99%
“…SAO population has been previously studied [2] and compared to Mar Chiquita lagoon (MC, Fig. 1), a northern, genetically separated and extensively studied population ( [3,7,14,15,19,20] and references thereof ). Individuals from SAO were smaller and presented a shorter reproductive period and these differences were attributed, at least in part, to food availability.…”
Section: Introductionmentioning
confidence: 99%
“…obs. ) indicate that the proportion of sediment ingested during feeding in mudflats is significantly lower than the proportion observed in adults by Lancia, Bas, and Spivak (2014), and therefore, the information on adult feeding should not be extrapolated to juveniles. If diet varies during ontogeny, available energy could vary markedly depending on the size of individuals, and growth rate or energy storage could vary widely with age (Lucifora, Garcia, Menni, Escalante, & Hozbor, 2009).…”
Section: Experimental Sitementioning
confidence: 99%