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Setting the stage for new ecological indicator species: a holistic case study on the Iberian dolphin freshwater mussel Unio delphinus Spengler, 1793

2020Journal article Open access
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dc.contributor.authorLopes-Lima, Manuel
dc.contributor.authorHinzmann, Mariana
dc.contributor.authorVarandas, Simone
dc.contributor.authorFroufe, Elsa
dc.contributor.authorReis, Joaquim
dc.contributor.authorMoreira, Cláudia
dc.contributor.authorAraújo, Sandra
dc.contributor.authorMiranda, Fernando Jorge Veloso
dc.contributor.authorGonçalves, Duarte V.
dc.contributor.authorBeja, Pedro
dc.contributor.authorSousa, Ronaldo
dc.contributor.authorTeixeira, Amílcar
dc.date.accessioned2020-05-07T10:26:40Z
dc.date.available2020-05-07T10:26:40Z
dc.date.issued2020
dc.date.updated2020-05-02T09:38:29Z
dc.description.abstractDue to their sensitivity and dramatic declines, freshwater mussels are prime targets for conservation and environmental monitoring. For this, however, information is needed on life history and ecological traits, which is lacking in many taxa, including threatened species. Species recently described or recognized as valid are of particular concern, due to the shortage of even basic knowledge. A case in point is the recently recognized and Near Threatened dolphin freshwater mussel Unio delphinus Spengler, 1793, which is endemic to the western Iberian Peninsula and has suffered marked population declines. To overcome information gaps for U. delphinus, we carried out a holistic biological study across the species range, aiming to: i) estimate the area of occupancy (AOO) and extent of occurrence (EOO) based on updated distribution data taken from the literature and recent surveys; ii) estimate growth patterns from biometrical (shell dimensions and growth annuli) measurements taken on specimens from seven populations; iii) estimate sex ratios from gonad tissue biopsies collected on specimens from eight populations; iv) estimate gametogenesis and sex ratio through histological examination of gonad and gill tissues collected monthly for a year, from a single population; and v) determine host species from infestation trials of glochidia with co-occurring fish species. We estimated an EOO of 706 km2 and an AOO of 61 km2, which together with data on declines assigns the species to the Endangered category using IUCN criteria. Unio delphinus was found to grow faster and to be shorter-lived (up to 11 years, maturity at around 2 years old) than other European freshwater mussels. Growth and life span are similar across the range in lotic habitats, but different from that in lentic habitats. The larvae of U. delphinus may attach to most co-occurring fish species, but only native species were effective hosts. Native cyprinids, especially those from the genus Squalius, seem to be the primary hosts. Overall, the information provided contributes to a better conservation status assessment, selection of conservation and rehabilitation areas, guidance for the establishment of propagation programs and better timing for specimens’ manipulation including monitoring and possible translocations. The framework presented here highlights the importance of basic biological studies to define good ecological and physiological status.pt_PT
dc.description.sponsorshipThis work was supported by Portuguese FCT – Foundation for Science and Technology, Projects FRESHCO: Multiple implications of invasive species on Freshwater Mussel co-extinction processes (PTDC/ AGR-FOR/1627/2014-04/SAICT/2015), MUSSELFLOW: Host-dependent evolution, ecology and conservation of freshwater mussels under varying hydrological conditions: consequences of climate change (PTDC/BIA-EVL/29199/2017), and ConBiomics: The missing approach for the Conservation of freshwater Bivalves Project N° NORTE-01-0145- FEDER-030286, co-financed by COMPETE 2020, Portugal 2020 and the European Union through the ERDF. FCT also supported MLL under grant (SFRH/BD/115728/2016), CM under grant (SFRH/BD/111133/ 2015) and also through Strategic Funding UID/Multi/04423/2019. PB was supported by EDP Biodiversity Chair.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLopes-Lima, Manuel; Hinzmann, Mariana; Varandas, Simone; Froufe, Elsa; Reis, Joaquim; Moreira, Cláudia; Araújo, Sandra; Miranda, Fernando; Gonçalves, Duarte V.; Beja, Pedro; Sousa, Ronaldo; Teixeira, Amílcar (2020). Setting the stage for new ecological indicator species: a holistic case study on the Iberian dolphin freshwater mussel Unio delphinus Spengler, 1793. Ecological Indicators. ISSN 1470-160X. 111, p. 1-14pt_PT
dc.identifier.doi10.1016/j.ecolind.2019.105987pt_PT
dc.identifier.eid2-s2.0-85076405525
dc.identifier.issn1470-160X
dc.identifier.slugcv-prod-1339274
dc.identifier.urihttp://hdl.handle.net/10198/21927
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectConservationpt_PT
dc.subjectUnionidapt_PT
dc.subjectLife-history traitspt_PT
dc.subjectGrowthpt_PT
dc.subjectHost-fishpt_PT
dc.titleSetting the stage for new ecological indicator species: a holistic case study on the Iberian dolphin freshwater mussel Unio delphinus Spengler, 1793pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleEcological Indicatorspt_PT
oaire.citation.volume111pt_PT
person.familyNameTeixeira
person.givenNameAmilcar
person.identifier2153193
person.identifier.ciencia-id9510-3CF3-0393
person.identifier.orcid0000-0001-5336-1174
person.identifier.scopus-author-id7202385393
rcaap.cv.cienciaid9510-3CF3-0393 | Amílcar Teixeira
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4f0753fd-4b4f-46f6-8e2f-20c7f835a32a
relation.isAuthorOfPublication.latestForDiscovery4f0753fd-4b4f-46f6-8e2f-20c7f835a32a

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