Food sources, digestive efficiency and resource allocation in the sea cucumber Holothuria forskali (Echinodermata: Holothuroidea): Insights from pigments and fatty acids

TitreFood sources, digestive efficiency and resource allocation in the sea cucumber Holothuria forskali (Echinodermata: Holothuroidea): Insights from pigments and fatty acids
Type de publicationJournal Article
Year of Publication2020
AuteursDavid, F, Hubas, C, Laguerre, H, Badou, A, Herault, G, Bordelet, T, Ameziane, N
JournalAquaculture Nutrition
Volume26
Ticket5
Pagination1568-1583
Date PublishedApr-08-2022
ISSN1353-5773
Mots-clésechinoderms, fatty acids, gut contents, Holothuria forskali, pigments, sea cucumbers
Résumé

Various research projects in Europe and North Africa have recently intended to breed temperate holothurians to alleviate fishing pressure on natural populations. However, to date little is known about the nutritional requirements of East Atlantic and Mediterranean species. In this study, we propose a “natural population”-oriented approach to characterize food sources, digestive efficiency and resources allocation based on the composition of pigments and fatty acids (FA) in gut contents and tis- sues (muscles, gonads and digestive tract walls) of wild individuals of the species Holothuria (Panningothuria) forskali (Delle Chiaje, 1823) sampled in Brittany (France). Our study reveals that neither green nor red algae enter the diet of H. forskali in spring and that the only fresh vegetal material found in gut contents is brown algae (very likely diatoms). The high nutritional quality of gut contents however contrasts with the detrital nature of the ingested food sources, suggesting that a trophic up- grading of organic matter occurs before digestion. In addition, unusual FA (i.e. only present in a few groups of living species) such as long-chain monounsaturated FA (especially the FA 23:1ω9) were found in large proportions in muscles and gonad and their effect on sea cucumber fitness needs further investigation.

URLhttps://onlinelibrary.wiley.com/doi/abs/10.1111/anu.13103
DOI10.1111/anu.13103
Short TitleAquacult Nutr
Catégorie HCERES
ACL - Articles dans des revues à comité de lecture
Publication coopération et recherche SUD
Non