DINAMICA DEL RECLUTAMIENTO DE LA MERLUZA EUROPEA
CTM2015-66676-C2-1-R
•
Nombre agencia financiadora Ministerio de Economía y Competitividad
Acrónimo agencia financiadora MINECO
Programa Programa Estatal de I+D+I Orientada a los Retos de la Sociedad
Subprograma Todos los retos
Convocatoria Proyectos de I+D+I dentro del Programa Estatal Retos de la Sociedad (2015)
Año convocatoria 2015
Unidad de gestión Dirección General de Investigación Científica y Técnica
Centro beneficiario AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS (CSIC)
Centro realización DPTO. DE ECOLOGIA Y RECURSOS MARINOS
Identificador persistente http://dx.doi.org/10.13039/501100003329
Resultados relacionados
Resultados totales (Incluyendo duplicados): 1Encontrada(s) 1 página(s)
Set de datos (Dataset). 2019
New insights in oocyte dynamics shed light on the complexities associated with fish reproductive strategies
DIGITAL.CSIC. Repositorio Institucional del CSIC
- Serrat, Alba
- Saborido-Rey, Fran
- García-Fernández, Cristina
- Muñoz, Marta
- Lloret, Josep
- Thorsen, Anders
- Kjesbu, Olav S.
15 pages, 5 figures, 1 table.-- This article is licensed under a Creative Commons Attribution 4.0 International License,, Information on temporal variations in stock reproductive potential (SRP) is essential in fisheries
management. Despite this relevance, fundamental understanding of egg production variability remains
largely unclear due to difficulties in tracking the underlying complex fluctuations in early oocyte
recruitment that determines fecundity. We applied advanced oocyte packing density theory to get
in-depth, quantitative insights across oocyte stages and seasons, selecting the commercially valuable
European hake (Merluccius merluccius) as a case study. Our work evidenced sophisticated seasonal
oocyte recruitment dynamics and patterns, mostly driven by a low-cost predefinition of fecundity as a
function of fish body size, likely influenced also by environmental cues. Fecundity seems to be defined
at a much earlier stage of oocyte development than previously thought, implying a quasi-determinate
– rather than indeterminate – fecundity type in hake. These results imply a major change in the
conceptual approach to reproductive strategies in teleosts. These findings not only question the current
binary classification of fecundity as either determinate or indeterminate, but also suggest that current
practices regarding potential fecundity estimation in fishes should be complemented with studies on
primary oocyte dynamics. Accordingly, the methodology and approach adopted in this study may be
profitably applied for unravelling some of the complexities associated with oocyte recruitment and
thereby SRP variability, This work was funded by the Spanish research grant DREAMER, Recruitment Dynamic
of European Hake (CTM2015-66676-C2-1-R). A.S. would like to thank the Annenberg Foundation, CA, USA
(Grant No. 16-249) and CSIC for supporting a research stay at IMR Bergen, and the University of Girona for the
PhD funding program (BR-UdG 2015). Likewise, C.G.-F. would like to thank the Fundación Tatiana Pérez de
Guzmán el Bueno for financial support towards her PhD, Peer reviewed
management. Despite this relevance, fundamental understanding of egg production variability remains
largely unclear due to difficulties in tracking the underlying complex fluctuations in early oocyte
recruitment that determines fecundity. We applied advanced oocyte packing density theory to get
in-depth, quantitative insights across oocyte stages and seasons, selecting the commercially valuable
European hake (Merluccius merluccius) as a case study. Our work evidenced sophisticated seasonal
oocyte recruitment dynamics and patterns, mostly driven by a low-cost predefinition of fecundity as a
function of fish body size, likely influenced also by environmental cues. Fecundity seems to be defined
at a much earlier stage of oocyte development than previously thought, implying a quasi-determinate
– rather than indeterminate – fecundity type in hake. These results imply a major change in the
conceptual approach to reproductive strategies in teleosts. These findings not only question the current
binary classification of fecundity as either determinate or indeterminate, but also suggest that current
practices regarding potential fecundity estimation in fishes should be complemented with studies on
primary oocyte dynamics. Accordingly, the methodology and approach adopted in this study may be
profitably applied for unravelling some of the complexities associated with oocyte recruitment and
thereby SRP variability, This work was funded by the Spanish research grant DREAMER, Recruitment Dynamic
of European Hake (CTM2015-66676-C2-1-R). A.S. would like to thank the Annenberg Foundation, CA, USA
(Grant No. 16-249) and CSIC for supporting a research stay at IMR Bergen, and the University of Girona for the
PhD funding program (BR-UdG 2015). Likewise, C.G.-F. would like to thank the Fundación Tatiana Pérez de
Guzmán el Bueno for financial support towards her PhD, Peer reviewed