Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea
43 Annual Larval Fish Conference, 21-24 May 2019, Palma, Balearic Islands.-- 1 page, 4 figures Blue whiting, Micromesistius poutassou, is a gadoid widely distributed in the North-Atlantic Ocean and Mediterranean Sea. The Mediterranean population is considered isolated from the Atlantic Ocean, and in...
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ftcsic:oai:digital.csic.es:10261/197518 2024-02-11T10:06:37+01:00 Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea Feeding ecology of blue whiting larvae in the NW Mediterranean Sea Mir-Arguimbau, Joan Olivar, M. Pilar Navarro, Joan Raya, Vanesa Sabatés, Ana 2019-05 http://hdl.handle.net/10261/197518 https://doi.org/10.13140/RG.2.2.14641.43364 unknown https://doi.org/10.13140/RG.2.2.14641.43364 Sí 43 Annual Larval Fish Conference (2019) http://hdl.handle.net/10261/197518 doi:10.13140/RG.2.2.14641.43364 open póster de congreso http://purl.org/coar/resource_type/c_6670 2019 ftcsic https://doi.org/10.13140/RG.2.2.14641.43364 2024-01-16T10:46:57Z 43 Annual Larval Fish Conference, 21-24 May 2019, Palma, Balearic Islands.-- 1 page, 4 figures Blue whiting, Micromesistius poutassou, is a gadoid widely distributed in the North-Atlantic Ocean and Mediterranean Sea. The Mediterranean population is considered isolated from the Atlantic Ocean, and in the northern Catalan coast (NW Mediterranean Sea) it is a species of high commercial interest. In this area, fluctuations in the abundance of blue whiting have been related to interannual variations in winter hydrodynamics. These, in turn, lead to fluctuations in primary production that, may then determine changes the survival of early life stages. For this reason, understanding food web interactions during the larval stage is pivotal to predict the success of recruitment to adult fish populations. In order to approach this subject, we studied the trophic ecology of blue whiting larvae by combining stomach content and stable isotopic analyses, in the Catalan coast, during two consecutive winters of contrasted environmental conditions. The specific aims were: (1) to analyse the diet composition of blue whiting larvae; (2) to assess the likely interannual differences in diet in relation to winter conditions and (3) to examine the trophic structure and relationships among blue whiting larvae and the biomass-dominant plankton items. The stomach content of blue whiting larvae (2-34 mm SL), collected day and night, was analysed and prey were measured and identified to the lowest taxon possible. Prey carbon content was estimated from size data using taxon-specific allometric equations. The stable isotope analyses were conducted in blue whiting larvae at different ages (preflexion, flexion and postflexion stages), in fractionated plankton samples, and in the most abundant planktonic groups Peer Reviewed Still Image North Atlantic Digital.CSIC (Spanish National Research Council) |
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Digital.CSIC (Spanish National Research Council) |
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43 Annual Larval Fish Conference, 21-24 May 2019, Palma, Balearic Islands.-- 1 page, 4 figures Blue whiting, Micromesistius poutassou, is a gadoid widely distributed in the North-Atlantic Ocean and Mediterranean Sea. The Mediterranean population is considered isolated from the Atlantic Ocean, and in the northern Catalan coast (NW Mediterranean Sea) it is a species of high commercial interest. In this area, fluctuations in the abundance of blue whiting have been related to interannual variations in winter hydrodynamics. These, in turn, lead to fluctuations in primary production that, may then determine changes the survival of early life stages. For this reason, understanding food web interactions during the larval stage is pivotal to predict the success of recruitment to adult fish populations. In order to approach this subject, we studied the trophic ecology of blue whiting larvae by combining stomach content and stable isotopic analyses, in the Catalan coast, during two consecutive winters of contrasted environmental conditions. The specific aims were: (1) to analyse the diet composition of blue whiting larvae; (2) to assess the likely interannual differences in diet in relation to winter conditions and (3) to examine the trophic structure and relationships among blue whiting larvae and the biomass-dominant plankton items. The stomach content of blue whiting larvae (2-34 mm SL), collected day and night, was analysed and prey were measured and identified to the lowest taxon possible. Prey carbon content was estimated from size data using taxon-specific allometric equations. The stable isotope analyses were conducted in blue whiting larvae at different ages (preflexion, flexion and postflexion stages), in fractionated plankton samples, and in the most abundant planktonic groups Peer Reviewed |
format |
Still Image |
author |
Mir-Arguimbau, Joan Olivar, M. Pilar Navarro, Joan Raya, Vanesa Sabatés, Ana |
spellingShingle |
Mir-Arguimbau, Joan Olivar, M. Pilar Navarro, Joan Raya, Vanesa Sabatés, Ana Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
author_facet |
Mir-Arguimbau, Joan Olivar, M. Pilar Navarro, Joan Raya, Vanesa Sabatés, Ana |
author_sort |
Mir-Arguimbau, Joan |
title |
Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
title_short |
Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
title_full |
Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
title_fullStr |
Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
title_full_unstemmed |
Feeding ecology of blue whiting (Micromesistius poutassou) larvae in the Northwestern Mediterranean Sea |
title_sort |
feeding ecology of blue whiting (micromesistius poutassou) larvae in the northwestern mediterranean sea |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/197518 https://doi.org/10.13140/RG.2.2.14641.43364 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.13140/RG.2.2.14641.43364 Sí 43 Annual Larval Fish Conference (2019) http://hdl.handle.net/10261/197518 doi:10.13140/RG.2.2.14641.43364 |
op_rights |
open |
op_doi |
https://doi.org/10.13140/RG.2.2.14641.43364 |
_version_ |
1790604437637562368 |