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dc.contributor.authorCharitonidou, Katerina
dc.contributor.authorKjesbu, Olav Sigurd
dc.contributor.authorDominguez-Petit, Rosario
dc.contributor.authorGarabana, Dolores
dc.contributor.authorKorta, Maria Albisua
dc.contributor.authorSantos, Maria and van Damme, Cindy J. G.
dc.contributor.authorThorsen, Anders
dc.contributor.authorGanias, Kostas
dc.date.accessioned2021-07-02T08:12:02Z-
dc.date.available2021-07-02T08:12:02Z-
dc.date.issued2020
dc.identifierISI:000571380300017
dc.identifier.issn0165-7836
dc.identifier.urihttp://dspace.azti.es/handle/24689/1073-
dc.description.abstractThe assessment of postovulatory follicles (POFs) is of considerable importance when applying the Daily Egg Production Method (DEPM) since it is used to estimate both spawning frequency (S) and batch fecundity (F-B), provided that daily cohorts of POFs are discernible. Atlantic sardine (Sardina pilchardus) and Atlantic mackerel (Scomber scombrus), two commercially valuable pelagic species with different spawning dynamics were investigated principally to evaluate the appropriateness of the POF method to properly reflect S and F-B. For appropriate quantification, both the Weibel and the postovulatory follicles packing density (POFPD) method, the latter described in this paper, were applied and compared. In sardine, not only was the existence of one single daily POF cohort confirmed but also the estimated number of POFs in the cohort matched gravimetric FB results. Furthermore, the Weibel method and POFPD led to similar results. However, several daily POF cohorts cooccurred in the mackerel ovary. Therefore, POF-based estimation of F-B only works for species such as sardine with a single, daily POF cohort. Likewise, in relation to estimation of S, the occurrence of single versus multiple POF cohorts makes the histological assignment of spawners to daily spawning classes either straightforward or difficult for species comparable to sardine or mackerel, respectively. In the latter case we suggest focusing in the largest, thus newest, POFs which correspond to the latest spawning event. Therefore, the appropriateness of the POF method in applications of the DEPM should be judged based on the spawning dynamics of the assessed species.
dc.language.isoEnglish
dc.publisherELSEVIER
dc.subjectSpawning fraction
dc.subjectPOF method
dc.subjectoocyte packing density theory
dc.subjectDEPM
dc.subjectSardina pilchardus
dc.subjectScomber scombrus
dc.subjectALBACORE THUNNUS-ALALUNGA
dc.subjectBATCH FECUNDITY
dc.subjectBLUEFIN TUNA
dc.subjectREPRODUCTIVE DEVELOPMENT
dc.subjectKATSUWONUS-PELAMIS
dc.subjectSKIPJACK TUNA
dc.subjectATLANTIC COD
dc.subjectOOCYTE SIZE
dc.subjectFREQUENCY
dc.subjectQUANTIFICATION
dc.titleContrasting post-ovulatory follicle production in fishes with different spawning dynamics
dc.typeArticle
dc.identifier.journalFISHERIES RESEARCH
dc.format.volume231
dc.contributor.funderEuropean Union (European Social Fund) through the Operational Programme Human Resources Development, Education and Lifelong Learning in the context of the project Strengthening Human Resources Research Potential via Doctorate Research [MIS-5000432]
dc.contributor.funderIMR project Climate and Vital Rates of Marine Stocks (CLIMRATES) [15205]
dc.contributor.funderNorwegian Fisheries Research Sales Tax System (FFA)
dc.contributor.funderEU through the European Maritime and Fisheries Fund (EMFF) for fisheries assessment
dc.identifier.e-issn1872-6763
dc.identifier.doi10.1016/j.fishres.2020.105710
Appears in Publication types:Artículos científicos



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