%0 Journal Article %J Marine Biology %D 2023 %T Sex-specific seasonal variations in the fatty acid and carotenoid composition of sea cucumber gonads and implications for aquaculture %A Frank David %A Herault, Gwen %A Ameziane, Nadia %A Tarik Meziane %A Badou, Aicha %A Cédric Hubas %B Marine Biology %V 170 %8 Jan-04-2023 %G eng %U https://link.springer.com/10.1007/s00227-023-04198-0 %N 4 %! Mar Biol %R 10.1007/s00227-023-04198-0 %0 Journal Article %J Aquaculture Nutrition %D 2020 %T Food sources, digestive efficiency and resource allocation in the sea cucumber Holothuria forskali (Echinodermata: Holothuroidea): Insights from pigments and fatty acids %A Frank David %A Cédric Hubas %A Laguerre, Helène %A Badou, Aicha %A Herault, Gwen %A Bordelet, Théo %A Ameziane, Nadia %K echinoderms %K fatty acids %K gut contents %K Holothuria forskali %K pigments %K sea cucumbers %X 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. %B Aquaculture Nutrition %V 26 %P 1568-1583 %8 Apr-08-2022 %G eng %U https://onlinelibrary.wiley.com/doi/abs/10.1111/anu.13103 %N 5 %! Aquacult Nutr %R 10.1111/anu.13103 %0 Conference Proceedings %B Second Kerguelen Plateau Symposium: marine ecosystem and fisheries %D 2019 %T Ecoregionalisation and conservation of benthic communities in the French exclusive economic zone of Kerguelen %A Martin, Alexis %E Trouslard, Emmanuelle %E Hautecoeur, Mélyne %E Blettery, Jonathan %E Moreau, Camille %E Saucède, Thomas %E Ameziane, Nadia %E Guy Duhamel %E Eleaume, Marc %K benthic ecosystems %K benthos %K deep-sea %K ecoregionalisation %K kerguelen %K poker %X

The deep-sea benthic ecosystems of the French Kerguelen exclusive economic zone remain poorly understood. To address benthic conservation issues, the authors recently contributed expert knowledge to guide the recent extension of the Marine Reserve of the ‘Terres australes françaises’. In this new study, we propose a benthic ecoregionalisation of the northern Kerguelen Plateau based on a measurable and repeatable methodology that relies on the generalised dissimilarity modelling technique. Data of macro-epibenthic invertebrate species from the POKER 2 (2010) fish stock assessment survey have been used to compute the models. Our results allow us (i) to characterise and map benthic landscape units based on assemblages of marine invertebrates pooled by taxa and life-history traits, (ii) to highlight the environmental drivers of the spatial distribution of benthic assemblages, (iii) to assess the relevance of the CCAMLR’s vulnerable marine ecosystems bioindicator taxa, and (iv) to assess the effectiveness of ‘strictly protected areas’ of the new Marine Reserve for the conservation of deep-sea benthic ecosystems.

%B Second Kerguelen Plateau Symposium: marine ecosystem and fisheries %7 Australian Antarctic Division, Kingston, Tasmania, Australia %I Australian Antarctic Division %C Kingston, Tasmania, Australia %V 1 %P pp 413 %8 11/06/2019 %G eng %U http://heardisland.antarctica.gov.au/__data/assets/pdf_file/0009/229158/34-Martin-FullMS.pdf %6 1