Comparative Assessment on Non-Indigenous Biofouling Species in Colombo Harbour Basin with Ships Arrive to the Colombo Harbour

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dc.contributor.authorDe Silva, N.K.L.
dc.contributor.authorThilakarathne, E.P.D.N.
dc.contributor.authorGunasekara, A.J.M.
dc.date.accessioned2021-02-05T05:07:15Z
dc.date.available2021-02-05T05:07:15Z
dc.date.issued2020
dc.description.abstractIntroduction of non-indigenous aquatic organisms to the new environments through ships biofouling has been identified as a major threat to world oceans and for the conservation of biodiversity. As an island nation with intensive shipping activities, there is a high possibility to introduce invasive species into Sri Lanka through ships biofouling. It is imperative to identify and assess the fouling related invasions in Sri Lankan waters to adopt necessary control measures. This study examined the biofouling related invasion in Colombo port with a view of adopting control measures. The study was undertaken between October 2019 to January 2020 in Colombo port. The hard substrate samples were collected monthly basis from eight sampling locations. The artificial settlement plates were deployed to collect benthic fouling samples. Samples were collected from the ship’s hull which arrived at the Colombo port from various regions of the world. 93 biofouling creatures were identified up to their family level and 83 up to their species level. 51% nonindigenous, 35% native, and 4% cryptogenic fouling species were detected. 33 native fouling organisms were detected from all samples. Relative abundance, diversity indices, species richness, and evenness were calculated. Mean relative abundance varied with 0.0169 to 0.0579. Amphibalanus amptrite the most abundant species on ship’s hull while Saccostrea cucullata was the most common species at harbour sites. The exotic species of Chathamalus montagui was recorded for the first time in Colombo harbour. The five globally known invasive alien species introduced through ships were recorded. Results imply that some invasive biofouling species had already settled in the harbour basin area and ships arrive in Colombo port poses a risk of introducing invasive species into Sri Lanka waters. This study suggests that it is exigent to adopt relevant international guidelines to mitigate the threat of introducing invasive species through ship biofouling. Keywords: Invasive alien species, Biofouling, Colombo port, Ship's hull, Introducingen_US
dc.identifier.isbn9789550481293
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/5792/proceeding_oct_08-256.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;International Research Conference
dc.subjectEnvironmental Scienceen_US
dc.subjectEcologyen_US
dc.subjectBiodiversity – Sri Lankaen_US
dc.subjectBiologyen_US
dc.titleComparative Assessment on Non-Indigenous Biofouling Species in Colombo Harbour Basin with Ships Arrive to the Colombo Harbouren_US
dc.title.alternativeInternational Research Conference 2020en_US
dc.typeOtheren_US
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