Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain).
The trophic ecology of European hake (Merluccius merluccius) larvae and early-juveniles from the Iberian shelf off Galicia (NW Spain) are assessed by means of stable isotopes (SIA) and nutritional condition in conjunction with hydrobiological variations observed during the winter and summer season o...
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2022
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Online Access: | http://hdl.handle.net/10508/16077 http://hdl.handle.net/10261/325980 https://doi.org/10.1111/fog.12603 |
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ftcsic:oai:digital.csic.es:10261/325980 2024-02-11T10:06:35+01:00 Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). Laiz-Carrión, Raúl Cabrero, Águeda Quintanilla-Hervás, José María Hernández-de-Rojas, Alma Uriarte-Ramalho, Amaya Gago, Jesús Rodríguez, José María Piñeiro-Álvarez, Carmen Gloria García-García, Alberto Saborido-Rey, Francisco Océan atlantique Atlantique Nord Atlantic Ocean Atlántico Norte Océano Atlántico ICES North Atlantic 2022-06-22 http://hdl.handle.net/10508/16077 http://hdl.handle.net/10261/325980 https://doi.org/10.1111/fog.12603 en eng Centro Oceanográfico de Málaga AM Fisheries Oceanography, https://doi.org/10.1111/fog.12603. 2022: 1-15 1054-6006 http://hdl.handle.net/10508/16077 http://hdl.handle.net/10261/325980 doi:10.1111/fog.12603 50372 open Pesquerías Centro Oceanográfico de Málaga fish upwelling ecology juveniles larvae research article 2022 ftcsic https://doi.org/10.1111/fog.12603 2024-01-16T11:48:17Z The trophic ecology of European hake (Merluccius merluccius) larvae and early-juveniles from the Iberian shelf off Galicia (NW Spain) are assessed by means of stable isotopes (SIA) and nutritional condition in conjunction with hydrobiological variations observed during the winter and summer season of 2012. Hake early-juveniles (18–47 mm SL) showed higher δ15N than larvae (3–11 mm SL) together with the microzooplankton (55–200 μm) and mesozooplankton (>200 μm) during both seasons. Low δ15N values and high variability in both zooplankton and hake larvae were found during winter coinciding with an unusually strong upwelling event. Inversely, high δ15N content in zooplankton in summer suggests strong nitrogen reutilization. However, hake larvae sampled in summer had a higher RNA:DNA ratio in line with higher Fulton condition factors than those sampled in winter. Higher δ13C values for microzooplankton and mesozooplankton and hake larvae in summer compared to late winter point to prey availability differences. The relationship between nitrogen and carbon stable isotopes versus size or weight suggests an ontogenetic shift in the diet of hake larvae. Early-juveniles had a lower isotopic niche width compared to larvae in both late winter and summer, indicating a trophic specialization related to changes following settlement process from planktonic life to demersal habitat. Higher trophic specialization was observed in summer, which recorded a narrower isotopic niche and higher trophic position estimations. SI Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Fulton ENVELOPE(-144.900,-144.900,-76.883,-76.883) Hake ENVELOPE(15.612,15.612,66.797,66.797) Fisheries Oceanography 31 5 539 553 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Pesquerías Centro Oceanográfico de Málaga fish upwelling ecology juveniles larvae |
spellingShingle |
Pesquerías Centro Oceanográfico de Málaga fish upwelling ecology juveniles larvae Laiz-Carrión, Raúl Cabrero, Águeda Quintanilla-Hervás, José María Hernández-de-Rojas, Alma Uriarte-Ramalho, Amaya Gago, Jesús Rodríguez, José María Piñeiro-Álvarez, Carmen Gloria García-García, Alberto Saborido-Rey, Francisco Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
topic_facet |
Pesquerías Centro Oceanográfico de Málaga fish upwelling ecology juveniles larvae |
description |
The trophic ecology of European hake (Merluccius merluccius) larvae and early-juveniles from the Iberian shelf off Galicia (NW Spain) are assessed by means of stable isotopes (SIA) and nutritional condition in conjunction with hydrobiological variations observed during the winter and summer season of 2012. Hake early-juveniles (18–47 mm SL) showed higher δ15N than larvae (3–11 mm SL) together with the microzooplankton (55–200 μm) and mesozooplankton (>200 μm) during both seasons. Low δ15N values and high variability in both zooplankton and hake larvae were found during winter coinciding with an unusually strong upwelling event. Inversely, high δ15N content in zooplankton in summer suggests strong nitrogen reutilization. However, hake larvae sampled in summer had a higher RNA:DNA ratio in line with higher Fulton condition factors than those sampled in winter. Higher δ13C values for microzooplankton and mesozooplankton and hake larvae in summer compared to late winter point to prey availability differences. The relationship between nitrogen and carbon stable isotopes versus size or weight suggests an ontogenetic shift in the diet of hake larvae. Early-juveniles had a lower isotopic niche width compared to larvae in both late winter and summer, indicating a trophic specialization related to changes following settlement process from planktonic life to demersal habitat. Higher trophic specialization was observed in summer, which recorded a narrower isotopic niche and higher trophic position estimations. SI |
format |
Article in Journal/Newspaper |
author |
Laiz-Carrión, Raúl Cabrero, Águeda Quintanilla-Hervás, José María Hernández-de-Rojas, Alma Uriarte-Ramalho, Amaya Gago, Jesús Rodríguez, José María Piñeiro-Álvarez, Carmen Gloria García-García, Alberto Saborido-Rey, Francisco |
author_facet |
Laiz-Carrión, Raúl Cabrero, Águeda Quintanilla-Hervás, José María Hernández-de-Rojas, Alma Uriarte-Ramalho, Amaya Gago, Jesús Rodríguez, José María Piñeiro-Álvarez, Carmen Gloria García-García, Alberto Saborido-Rey, Francisco |
author_sort |
Laiz-Carrión, Raúl |
title |
Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
title_short |
Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
title_full |
Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
title_fullStr |
Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
title_full_unstemmed |
Shifts in the seasonal trophic ecology of larvae and juveniles of European hake (Merluccius merluccius): From the Galician upwelling system (NW Spain). |
title_sort |
shifts in the seasonal trophic ecology of larvae and juveniles of european hake (merluccius merluccius): from the galician upwelling system (nw spain). |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/16077 http://hdl.handle.net/10261/325980 https://doi.org/10.1111/fog.12603 |
op_coverage |
Océan atlantique Atlantique Nord Atlantic Ocean Atlántico Norte Océano Atlántico ICES North Atlantic |
long_lat |
ENVELOPE(-144.900,-144.900,-76.883,-76.883) ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Fulton Hake |
geographic_facet |
Fulton Hake |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Centro Oceanográfico de Málaga AM Fisheries Oceanography, https://doi.org/10.1111/fog.12603. 2022: 1-15 1054-6006 http://hdl.handle.net/10508/16077 http://hdl.handle.net/10261/325980 doi:10.1111/fog.12603 50372 |
op_rights |
open |
op_doi |
https://doi.org/10.1111/fog.12603 |
container_title |
Fisheries Oceanography |
container_volume |
31 |
container_issue |
5 |
container_start_page |
539 |
op_container_end_page |
553 |
_version_ |
1790604380560424960 |