Show simple item record

Files in this item


Item metadata

dc.contributor.authorDeacon, A.
dc.contributor.authorMahabir, Rajindra
dc.contributor.authorInderlall, Devan
dc.contributor.authorRamnarine, Indar W.
dc.contributor.authorMagurran, Anne E.
dc.identifier.citationDeacon , A , Mahabir , R , Inderlall , D , Ramnarine , I W & Magurran , A E 2017 , ' Evaluating detectability of freshwater fish assemblages in tropical streams : is hand-seining sufficient? ' , Environmental Biology of Fishes , vol. 100 , no. 7 , pp. 839-849 .
dc.identifier.otherPURE: 249965342
dc.identifier.otherPURE UUID: cac7284b-d2fd-4e92-83ff-f83c807c23a4
dc.identifier.otherScopus: 85020106766
dc.identifier.otherORCID: /0000-0002-0036-2795/work/43550233
dc.identifier.otherWOS: 000403579400008
dc.descriptionThis work was funded by a European Research Council grant (BIOTIME 250189). AEM also acknowledges the Royal Society.en
dc.description.abstractUnprecedented threats to natural ecosystems mean that accurate quantification of biodiversity is a priority, particularly in the tropics which are underrepresented in monitoring schemes. Data from a freshwater fish assemblage in Trinidad were used to evaluate the effectiveness of hand-seining as a survey method in tropical streams. We uncovered large differences in species detectability when hand-seining was used alone, in comparison with when hand-seining and electrofishing were used together. The addition of electrofishing increased the number of individuals caught threefold, and increased the biomass fivefold. Some species were never detected using hand-seining, resulting in significant underestimates of species richness; rarefaction curves suggest that even when hand-seining effort increases, species richness is still underestimated. Diversity indices (Shannon and Simpson index) reveal that diversity was also significantly lower for hand-seined samples. Furthermore, the results of multivariate analyses investigating assemblage structure also differed significantly depending on whether they were based on hand-seined data alone, or a combination of hand-seining and electrofishing. Despite the extra equipment and maintenance required, these findings underline the value of including electrofishing when sampling tropical freshwater streams.
dc.relation.ispartofEnvironmental Biology of Fishesen
dc.rights© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.en
dc.subjectAlpha diversityen
dc.subjectSpecies richnessen
dc.subjectSampling methodsen
dc.subjectGear biasen
dc.subjectQH301 Biologyen
dc.subjectSH Aquaculture. Fisheries. Anglingen
dc.subjectSDG 15 - Life on Landen
dc.titleEvaluating detectability of freshwater fish assemblages in tropical streams : is hand-seining sufficient?en
dc.typeJournal articleen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorEuropean Research Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Centre for Biological Diversityen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. St Andrews Sustainability Instituteen
dc.contributor.institutionUniversity of St Andrews. Fish Behaviour and Biodiversity Research Groupen
dc.contributor.institutionUniversity of St Andrews. Centre for Research into Ecological & Environmental Modellingen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record