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AuthorGarrido, S.
AuthorBen-Hamadou, R.
AuthorSantos, A.M.P.
AuthorFerreira, S.
AuthorTeodosio, M.A.
AuthorCotano, U.
AuthorIrigoien, X.
AuthorPeck, M.A.
AuthorSaiz, E.
AuthorRe, P.
Available date2015-12-15T06:53:52Z
Publication Date2015-11
Publication NameScientific Reports
CitationGarrido, S. et al. "Born small, die young: Intrinsic, size-selective mortality in marine larval fish", Scientific Reports, 2015, Volume 5 Article number: 17065. Article published online November 2015.
ISSN2045-2322
URIhttp://dx.doi.org/10.1038/srep17065
URIhttp://hdl.handle.net/10576/3960
AbstractMortality during the early stages is a major cause of the natural variations in the size and recruitment strength of marine fish populations. In this study, the relation between the size-at-hatch and early survival was assessed using laboratory experiments and on field-caught larvae of the European sardine (Sardina pilchardus). Larval size-at-hatch was not related to the egg size but was significantly, positively related to the diameter of the otolith-at-hatch. Otolith diameter-at-hatch was also significantly correlated with survival-at-age in fed and unfed larvae in the laboratory. For sardine larvae collected in the Bay of Biscay during the spring of 2008, otolith radius-at-hatch was also significantly related to viability. Larval mortality has frequently been related to adverse environmental conditions and intrinsic factors affecting feeding ability and vulnerability to predators. Our study offers evidence indicating that a significant portion of fish mortality occurs during the endogenous (yolk) and mixed (yolk /prey) feeding period in the absence of predators, revealing that marine fish with high fecundity, such as small pelagics, can spawn a relatively large amount of eggs resulting in small larvae with no chances to survive. Our findings help to better understand the mass mortalities occurring at early stages of marine fish.
SponsorProject VITAL (Vital rates of pelagic fish larvae PTDC/MAR/111304/2009). S.G. is supported by the Portuguese Foundation for Science and Technology (FCT) through a Post-Doctoral Fellowship (SFRH/BPD/38332/2007). This work was also partially funded by project MODELA (PTDC/MAR/098643/2008). The microalgae Rhodomonas baltica was provided by the Assemble Program (grant 227799) funded under the EU (FP7). This publication was made open access through a support from Qatar University (IDC of R.B-H).
Languageen
PublisherNature Publishing Group
SubjectFishes -- Larvae.
SubjectMarine fishes.
TitleBorn small, die young: Intrinsic, size-selective mortality in marine larval fish
TypeArticle
Volume Number5


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