Trophic ecology of juvenile flatfish in a coastal nursery ground: contributions of intertidal primary production and freshwater particulate organic matter

Abstract : Coastal and estuarine nurseries are essential habitats for juvenile flatfish. These small but productive areas provide food supply and sustain adult fish populations. The Mont-Saint-Michel Bay (MSMB) supports an important flatfish nursery ground but differs from many other nursery habitats due to limited freshwater inputs. The objectives of the present study in the MSMB were to (1) use gut content analysis to identify prey of the 2 most abundant flatfish species (common sole Solea solea and plaice Pleuronectes platessa) for different juvenile age-classes (0-group and 1-group for sole, 0-group for plaice), (2) use C and N stable isotope analysis to model the production sources sustaining juvenile flatfish production, and (3) compare these results with previous knowledge of estuarine nursery grounds located in western Europe. Items found in gut contents differed between species and size classes, with juvenile plaice having a larger prey spectrum. Despite accounting for sensitivity to large uncertainties in source signatures and trophic enrichment factors, stable isotope mixing models led to robust outputs. In contrast to previous studies in estuarine nurseries, we found that microphytobenthos was the major carbon source contribution to juvenile flatfish. The contribution of freshwater particulate organic matter was nonetheless significant, in spite of the very limited river inputs to MSMB.
Document type :
Journal articles
Complete list of metadatas

https://hal-agrocampus-ouest.archives-ouvertes.fr/hal-00840410
Contributor : Céline Martel <>
Submitted on : Tuesday, July 2, 2013 - 2:24:33 PM
Last modification on : Tuesday, June 4, 2019 - 5:03:34 PM

Links full text

Identifiers

Citation

C. Kostecki, J.M. Roussel, N. Desroy, G. Roussel, J. Lanshere, et al.. Trophic ecology of juvenile flatfish in a coastal nursery ground: contributions of intertidal primary production and freshwater particulate organic matter. Marine Ecology Progress Series, Inter Research, 2012, pp.221-232. ⟨10.3354/meps09563⟩. ⟨hal-00840410⟩

Share

Metrics

Record views

199