Spatial and Temporal Variability in the Occurrence and Abundance of European Hake Larvae, Merluccius merluccius, on the Galician Shelf (NE Atlantic)
| Autor: | Joel K. Llopiz, Cristina Garcia-Fernandez, Fran Saborido-Rey, Justin J. Suca, Rosario Domínguez-Petit, Paula Alvarez |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2021 |
| Předmět: |
Science
Hake fisheries Ocean Engineering Aquatic Science QH1-199.5 Oceanography Hake Abundance (ecology) oceanography living resources reproductive phenology Water Science and Technology European hake Global and Planetary Change Larva biology Generalized additive model annual recruitment larval ecology General. Including nature conservation geographical distribution Merluccius merluccius Fish larvae Ichthyoplankton biology.organism_classification Early life environmental conditions Geography |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Frontiers in Marine Science, Vol 8 (2021) e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía |
| Popis: | 14 pages, 5 figures, 2 tables.-- This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) 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 This study was carried out with financial support from the CRAMER (CTM2010-21856-218567-CO3-02) and DREAMER projects (CTM2015-66676-C2-1-R) funded by the Spanish National Research Program. CG-F was supported by a Predoctoral Fellowship from the Fundación Tatiana Pérez de Guzmán el Bueno, as well as the support by Do*Mar (Ph.D. program). JJS was supported by the National Science Foundation Graduate Research Fellowship. JKL was supported by the Academic Programs Office at Woods Hole Oceanographic Institution |
| Databáze: | OpenAIRE |
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