A trophic latitudinal gradient revealed in anchovy and sardine from the Western Mediterranean Sea using a multi-proxy approach

Type Article
Date 2020-10
Language English
Author(s) Bachiller Eneko1, Albo-Puigserver Marta1, Giménez Joan1, Pennino Maria Grazia2, Marí-Mena Neus3, Esteban Antonio4, Lloret-Lloret Elena1, Jadaud Angelique5, Carro Belén3, Bellido José María4, Coll Marta1
Affiliation(s) 1 : Institut de Ciències del Mar (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, 08003, Barcelona, Spain
2 : Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Subida Radio Faro, 50, 36390, Vigo, Spain
3 : AllGenetics and Biology SL, Edificio CICA, Campus de Elviña, 15008, A Coruña, Spain
4 : Instituto Español de Oceanografía, Centro Oceanográfico de Murcia, Varadero 1 Apdo 22, 30740, San Pedro del Pinatar, Murcia, Spain
5 : Marine Biodiversity, Exploitation and Conservation (MARBEC), Ifremer, University Montpellier, CNRS, IRD, Sète, France
Source Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2020-10 , Vol. 10 , N. 1 , P. 17598 (18p.)
DOI 10.1038/s41598-020-74602-y
WOS© Times Cited 7
Abstract

This work combines state-of-the-art methods (DNA metabarcoding) with classic approaches (visual stomach content characterization and stable isotope analyses of nitrogen (δ15N) and carbon (δ13C)) to investigate the trophic ecology of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) at high taxonomic and spatial resolution in the Western Mediterranean Sea. Gut contents observed are in accordance with the dietary plasticity generally described for anchovy and sardine, suggesting a diet related to the opportunistic ingestion of available prey in a certain area and/or time. Genetic tools also showed modest inter-specific differences regarding ingested species. However, inter-specific and intra-specific differences in ingested prey frequencies and prey biomass reflected a latitudinal signal that could indicate a more effective predation on large prey like krill by anchovy versus sardine, as well as a generalized higher large prey ingestion by both species southwards. In fact, both species presented lower δ15N in the northernmost area. This latitudinal gradient indicates changes in the trophic ecology of anchovy and sardine that coincide with previously described better biological conditions for fish in the southern part of the study area as well as higher landings of both species in recent years.

Full Text
File Pages Size Access
Publisher's official version 18 2 MB Open access
Supplementary Information. 3 MB Open access
Top of the page

How to cite 

Bachiller Eneko, Albo-Puigserver Marta, Giménez Joan, Pennino Maria Grazia, Marí-Mena Neus, Esteban Antonio, Lloret-Lloret Elena, Jadaud Angelique, Carro Belén, Bellido José María, Coll Marta (2020). A trophic latitudinal gradient revealed in anchovy and sardine from the Western Mediterranean Sea using a multi-proxy approach. Scientific Reports, 10(1), 17598 (18p.). Publisher's official version : https://doi.org/10.1038/s41598-020-74602-y , Open Access version : https://archimer.ifremer.fr/doc/00656/76807/