Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)

The European hake (Merluccius merluccius) is represented as one of the most valuable fisheries in the Galician shelf. We analyzed the distribution, abundance, and environmental conditions of the southern-stock European hake larvae from the Galician shelf during the two main spawning peaks, winter-sp...

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Autores principales:	Cristina García-Fernández, Justin J. Suca, Joel K. Llopiz, Paula Álvarez, Rosario Domínguez-Petit, Fran Saborido-Rey
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	larval ecology European hake reproductive phenology environmental conditions annual recruitment Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/3d41b90ee7604f04912195580b5d3940
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spelling	oai:doaj.org-article:3d41b90ee7604f04912195580b5d39402021-12-01T08:15:54ZSpatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)2296-774510.3389/fmars.2021.696246https://doaj.org/article/3d41b90ee7604f04912195580b5d39402021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.696246/fullhttps://doaj.org/toc/2296-7745The European hake (Merluccius merluccius) is represented as one of the most valuable fisheries in the Galician shelf. We analyzed the distribution, abundance, and environmental conditions of the southern-stock European hake larvae from the Galician shelf during the two main spawning peaks, winter-spring and summer, based on the data from three ichthyoplankton surveys (March 2012, March 2017, and June 2017). A total of 395 larvae in March 2012, 121 in March 2017, and 69 in June 2017 were captured. The northeast section of the study area, close to Estaca de Bares, primarily between 100 and 200 m isobaths, had the highest presence of the European hake larvae in all surveys. Generalized additive models (GAMs) indicated that the occurrence of larvae was significantly different between the surveys and was associated negatively with the temperature, while the abundance of larvae was significantly different between sampling years and was the highest at a temperature around 13.36°C and at sea surface heights of about −0.48 m. Studies of the distribution of early life stages and their relation to external conditions are essential to the understanding of the complex process of recruitment, especially in the exploited species and in highly dynamic environments like the Galician shelf.Cristina García-FernándezJustin J. SucaJoel K. LlopizPaula ÁlvarezRosario Domínguez-PetitFran Saborido-ReyFrontiers Media S.A.articlelarval ecologyEuropean hakereproductive phenologyenvironmental conditionsannual recruitmentScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	larval ecology European hake reproductive phenology environmental conditions annual recruitment Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	larval ecology European hake reproductive phenology environmental conditions annual recruitment Science Q General. Including nature conservation, geographical distribution QH1-199.5 Cristina García-Fernández Justin J. Suca Joel K. Llopiz Paula Álvarez Rosario Domínguez-Petit Fran Saborido-Rey Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
description	The European hake (Merluccius merluccius) is represented as one of the most valuable fisheries in the Galician shelf. We analyzed the distribution, abundance, and environmental conditions of the southern-stock European hake larvae from the Galician shelf during the two main spawning peaks, winter-spring and summer, based on the data from three ichthyoplankton surveys (March 2012, March 2017, and June 2017). A total of 395 larvae in March 2012, 121 in March 2017, and 69 in June 2017 were captured. The northeast section of the study area, close to Estaca de Bares, primarily between 100 and 200 m isobaths, had the highest presence of the European hake larvae in all surveys. Generalized additive models (GAMs) indicated that the occurrence of larvae was significantly different between the surveys and was associated negatively with the temperature, while the abundance of larvae was significantly different between sampling years and was the highest at a temperature around 13.36°C and at sea surface heights of about −0.48 m. Studies of the distribution of early life stages and their relation to external conditions are essential to the understanding of the complex process of recruitment, especially in the exploited species and in highly dynamic environments like the Galician shelf.
format	article
author	Cristina García-Fernández Justin J. Suca Joel K. Llopiz Paula Álvarez Rosario Domínguez-Petit Fran Saborido-Rey
author_facet	Cristina García-Fernández Justin J. Suca Joel K. Llopiz Paula Álvarez Rosario Domínguez-Petit Fran Saborido-Rey
author_sort	Cristina García-Fernández
title	Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
title_short	Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
title_full	Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
title_fullStr	Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
title_full_unstemmed	Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
title_sort	spatial and temporal variability in the occurrence and abundance of european hake larvae, merluccius merluccius, on the galician shelf (ne atlantic)
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/3d41b90ee7604f04912195580b5d3940
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Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)

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