Identification of the food sources of ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Identification of the food sources of sympatric ghost shrimp (Trypaea australiensis) and soldier crab (Mictyris longicarpus) populations using a lipid biomarker, dual stable isotope approach
Auteur(s) :
Spilmont, Nicolas [Auteur correspondant]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Méziane, Tarik [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Seuront, Laurent [Auteur]
Welsh, David [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Méziane, Tarik [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Seuront, Laurent [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Welsh, David [Auteur]
Titre de la revue :
Austral Ecology
Pagination :
878-888
Éditeur :
Wiley
Date de publication :
2009
ISSN :
1442-9985
Mot(s)-clé(s) en anglais :
food source
lipid biomarker
Mictyris longicarpus
stable isotope
Trypaea australiensis
lipid biomarker
Mictyris longicarpus
stable isotope
Trypaea australiensis
Discipline(s) HAL :
Sciences du Vivant [q-bio]/Ecologie, Environnement
Résumé en anglais : [en]
Fatty acids (FAs) profiles and stable isotope signatures of the ghost shrimp, Trypaea australiensis and the soldier crab, Mictyris longicarpus were determined at an unvegetated sandbank of Southport (Gold Coast, Queensland, ...
Lire la suite >Fatty acids (FAs) profiles and stable isotope signatures of the ghost shrimp, Trypaea australiensis and the soldier crab, Mictyris longicarpus were determined at an unvegetated sandbank of Southport (Gold Coast, Queensland, Australia), in November 2005 and February 2006. Additionally, the FAs composition of the faeces and feeding pellets of M. longicarpus and the surface sediment at the study site were also analysed. Trypaea australiensis was found to selectively feed principally on benthic diatoms, as revealed by the high contribution of the marker lipid (20:5 (n-3)) to tissue total FAs and the delta 13C and delta 15N isotopic signatures of shrimp tissues. Although the diet of T. australiensis did not change between the two sampling periods, the shrimps appeared to reduce their feeding activity in summer, presumably in relation to a restricted metabolism, as revealed by a decrease in the contribution of the microalgal markers in their tissues. The FAs composition of the tissues of the soldier crab indicated that bacteria and diatoms constituted the base of its diet (contributions of branched 15:0 and 17:0, 18:1 (n-7) and 20:5 (n-3)). However, the isotopic signatures of the crabs suggested that meiofauna may represent an intermediate link between the crab and these micro-organismsLire moins >
Lire la suite >Fatty acids (FAs) profiles and stable isotope signatures of the ghost shrimp, Trypaea australiensis and the soldier crab, Mictyris longicarpus were determined at an unvegetated sandbank of Southport (Gold Coast, Queensland, Australia), in November 2005 and February 2006. Additionally, the FAs composition of the faeces and feeding pellets of M. longicarpus and the surface sediment at the study site were also analysed. Trypaea australiensis was found to selectively feed principally on benthic diatoms, as revealed by the high contribution of the marker lipid (20:5 (n-3)) to tissue total FAs and the delta 13C and delta 15N isotopic signatures of shrimp tissues. Although the diet of T. australiensis did not change between the two sampling periods, the shrimps appeared to reduce their feeding activity in summer, presumably in relation to a restricted metabolism, as revealed by a decrease in the contribution of the microalgal markers in their tissues. The FAs composition of the tissues of the soldier crab indicated that bacteria and diatoms constituted the base of its diet (contributions of branched 15:0 and 17:0, 18:1 (n-7) and 20:5 (n-3)). However, the isotopic signatures of the crabs suggested that meiofauna may represent an intermediate link between the crab and these micro-organismsLire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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