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Reproduction traits and strategies of two Sardinella species off the Southwest Coast of Africa

dc.contributor.authorQuiatuhanga, Domingas
dc.contributor.authorMorais, Pedro
dc.contributor.authorKrug, Lilian
dc.contributor.authorTeodosio, Maria
dc.date.accessioned2025-10-08T09:05:54Z
dc.date.available2025-10-08T09:05:54Z
dc.date.issued2025-06-02en_US
dc.date.updated2025-10-07T16:35:21Z
dc.description.abstractSmall pelagic fishes such as Sardinella aurita (Valenciennes, 1847) and Sardinella maderensis (R. T. Lowe, 1838) are key intermediate-level components of the marine food web of the southwestern African coast. Their biomass off Angola has shown significant interannual variability, and information about their reproduction is insufficient in the region for adequate stock management. Thus, we aimed to unveil the reproduction period and reproductive traits of these two Sardinella species and establish a link with the prevailing ocean temperature conditions. Adult fish samples were obtained monthly from artisanal and semi-industrial fleets, and the ichthyoplankton samples were collected with a Hydro-Bios Multinet off southwest Angola by Instituto Nacional de Investigação Pesqueira (Angola). The macroscopic inspection of gonads showed that females of both species were more abundant than males. The gonadosomatic index and maturity stages indicate that S. aurita spawns during the Austral summer (December through March), while S. maderensis has a longer spawning period, from October to April. The spawning peak occurs in February for S. aurita and S. maderensis. The mean monthly condition factor of both species was high before and after spawning seasons. The females of S. aurita reach sexual maturity at a smaller size than males, and 50% of the population reaches sexual maturity at a total length of 31.3 cm. The males of S. maderensis reach sexual maturity at a smaller size than females, and 50% of the population reaches sexual maturity at a total length of 28.4 cm. We also found that both species use the southern coast of Angola as a spawning area during the Austral summer and avoid the area during periods of intense upwelling. Currently, these species are managed as a single unit, and the minimum capture size is set at 22 cm, well below the size at sexual maturity registered in the study area. Therefore, we strongly recommend increasing the minimum capture size to guarantee long-term stock viability.eng
dc.description.sponsorshipPRT/BD/154614/2022
dc.description.versionN/A
dc.identifier.doi10.3390/fishes10060261en_US
dc.identifier.slugcv-prod-4551653
dc.identifier.urihttp://hdl.handle.net/10400.1/27797
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectSardinella aurita
dc.subjectSardinella maderensis
dc.subjectReproduction
dc.subjectIchthyoplankton
dc.subjectSpawning timing
dc.subjectSexual maturity
dc.subjectSea surface temperature
dc.subjectAngola
dc.titleReproduction traits and strategies of two Sardinella species off the Southwest Coast of Africaeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage261
oaire.citation.titleFishesen_US
oaire.citation.volume10
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameQuiatuhanga
person.familyNameKrug
person.familyNameTeodosio
person.givenNameDomingas
person.givenNameLilian
person.givenNameMaria
person.identifier.ciencia-id501F-2A75-BBD3
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.orcid0000-0002-5485-5181
person.identifier.orcid0000-0002-0066-7679
person.identifier.orcid0000-0002-0939-9885
person.identifier.ridB-5077-2013
person.identifier.scopus-author-id23479793500
person.identifier.scopus-author-id56196396700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaidAF10-647B-65FB | MARIA ALEXANDRA ANICA TEODÓSIO
rcaap.rightsopenAccessen_US
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