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| Le Gall, Solange; Bel Hassen, Malika; Le Gall, Pierre. |
| The linked concepts of 'microbial loop' and 'protozoan trophic link' have been very well documented in filter-feeding microzooplankton such as copepods, but have not been applied to energy transfer to benthic suspension-feeding macrofauna, with the exception of the recent demonstration of heterotrophic flagellate assimilation by mussels. The oyster Crassostrea gigas obtains energy resources by filtering microalgae (similar to 5 to 100 mu m). However, in turbid estuaries, light-limited phytoplanktonic production cannot entirely account for oyster energy requirements. Conversely, picoplankters (<2 mu m), which are main effecters of coastal energy flow and matter cycling, are not efficiently retained by oyster filtration. Ciliate protozoal as both... |
| Tipo: Text |
Palavras-chave: Oyster; Food sources; Picoplankton; Protozoa; Trophic link. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00337/44788/44482.pdf |
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| Riera, P; Richard, P; Gremare, A; Blanchard, G. |
| Nematodes living on an intertidal mudflat of the Marennes-Oleron Bay (France) were assayed for delta(13)C and delta(15)N ratios together with their potential food resources between July 1992 and May 1993. Results suggest that nematodes do not exploit all the components of the sedimented organic matter (SOM) pool at the same rate. Furthermore, based on coefficients of average trophic enrichment found in the literature for both C and N, the enrichment of nematodes in C-13 and their depletion in N-15 relative to SOM suggest that microphytobenthos constitutes their main food source in this particular environment. |
| Tipo: Text |
Palavras-chave: Nematodes; Microphytobenthos; Food sources; Stable isotope ratios. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00282/39288/43132.pdf |
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| Riera, Pascal; Montagna, Pa; Kalke, Rd; Richard, Pierre. |
| The trophic dynamic Links of migratory juvenile brown shrimp Penaeus aztecus were investigated along the South Texas coast from the Aransas Pass to Corpus Christi and Nueces Bay and to the nursery ground in the Nueces Delta. Shrimps and their potential food sources were measured for delta(13)C and delta(15)N ratios between December 1995 and July 1996. During this period, shrimp length increased from 10 to 11 mm, when the animals entered Corpus Christi Bay as larvae, to 80-90 mm, when they returned to Mexico Gulf as sub-adults. Brown shrimp exhibited spatial and temporal delta(13)C variation (from -25.2 to 12.5 parts per thousand), indicating a high diversity of food sources throughout their migration. From delta(13)C values, the main sources used as food... |
| Tipo: Text |
Palavras-chave: Penaeus aztecus; Food sources; Migration; Nursery area; Delta C 13 and delta N 15. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00000/10496/7604.pdf |
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| Lavaud, Romain; Artigaud, Sebastien; Le Grand, Fabienne; Donval, Anne; Soudant, Philippe; Flye-sainte-marie, Jonathan; Strohmeier, Tore; Strand, Oivind; Leynaert, Aude; Beker, Beatriz; Chatterjee, Arnab; Jean, Fred. |
| We combined the use of pigments, fatty acids and sterols as biomarkers of the seasonal variation in food sources of the great scallop Pecten maximus. From March to October 2011, on a biweekly to twice-weekly basis, scallops and seawater from the water column and the water-sediment interface were collected in the Bay of Brest (Brittany, France). Pigment compositions in the seawater and in the stomach and rectum content of the scallops were analyzed by HPLC. Fatty acids and sterols from digestive gland (DG) tissue were analyzed by gas chromatography. Potential relationships between the temporal proportion of each marker in the environment and in the digestive tract were tested using multivariate analysis. Proportions of diatoms and Dinophyceae biomarkers... |
| Tipo: Text |
Palavras-chave: Trophic ecology; Food sources; Pigments; Fatty acids; Trophic marker; Phytoplankton; Pecten maximus. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00431/54244/55772.pdf |
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