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| Autori principali: | , , , , , , , |
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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Scientific reports
2025
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| Soggetti: | |
| Accesso online: | https://pubmed.ncbi.nlm.nih.gov/40119137/ |
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Sommario:
- How sediment granulometry affects feeding behaviour in sea cucumbers: a case study on Holothuria sanctori. Magdy, Mohammad Grosso, Luca Pensa, Davide Ciriminna, Laura Fianchini, Alessandra Vizzini, Salvatrice Cataudella, Stefano Rakaj, Arnold Animals Geologic Sediments Holothuria Feeding Behavior Particle Size Sea Cucumbers Defecation Feces The sea cucumber Holothuria sanctori is an Atlanto-Mediterranean deposit feeder that contributes to sediment processing in coastal areas. However, the feeding ecology of this species, including its sediment processing capacity, remains largely unexplored under controlled conditions. This study investigates the effect of sediment granulometry on the feeding behaviour of H. sanctori, focusing on organic matter (OM) selectivity and sediment ingestion. Specimens were tested under five experimental treatments, each containing sediments with particle sizes ranging from 0 to 1000 μm, with standardized OM availability across treatments. A natural simulation with a hard, sediment-free substrate was also included. Data on defecation rate and faecal OM content was collected daily to evaluate sediment processing capacity. Results indicate that H. sanctori optimally selects OM (average OM: 4.2%) and processes sediment (average defecation rate: 1.5 g/day per 100 g biomass WW) in fine particle treatments (