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A study of the survival rate of Acropora corals outplanted in Damselfish territories: A minor field study in Malolo Lailai, Fiji
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
2023 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
En studie av överlevnadsgraden hos Acropora koraller planterade i frökenfiskars territorium (Swedish)
Abstract [en]

This bachelor thesis was executed as a Minor Field Study (MFS) in Malolo Lailai Island, Fiji.The Minor Field Study was funded by the state agency Swedish International DevelopmentCooperation Agency (SIDA). The thesis was written during the spring of 2023 at the RoyalInstitute of Technology (KTH) in Stockholm and the project was created and executedtogether with the organisation Corals for Conservation (C4C) located in Fiji.

Coral reefs around the world are degraded due to many different anthropogenic stressors,where climate change is a major one. This has affected the reefs in Fiji as sea temperaturesare rising which is causing corals to bleach. Efforts are being made to restore the reefs whichincludes outplanting and monitoring corals in degraded reefs. As conditions in the seaschange, corals are increasingly exposed to predators and disease. Against this backgroundthis project was created in order to see if outplanting corals inside or close to a Damselfish(Stegastes nigricans) territory makes any difference to the survival rate of the corals. Theresults show that corals outplanted outside of a Damselfish territory has a higher risk ofexposure to predators as well as foragers which leads to a lower survival rate. The conclusionthat was made was that planting corals inside of a Damselfish territory therefore increases thechances of corals surviving.  

Abstract [sv]

Detta kandidatexamensarbete har gjorts som en Minor Field Study (MFS) på Malolo LailaiIsland, Fiji. Arbetet har blivit finansierat av Styrelsen för internationellt utvecklingssamarbete(SIDA). Arbetet skrevs under våren 2023 på Kungliga Tekniska Högskolan (KTH) iStockholm och projektet är grundat och utfört tillsammans med organisationen Corals forConservation (C4C), beläget i Fiji.

Hälsan hos korallrev runt om i världen försämras allt mer på grund av flera olika antropogenastressfaktorer såsom exempelvis klimatförändringar. Detta har påverkat reven runt om Fijinegativt på grund av ökade havstemperaturer som resulterar i att koraller bleks. Flertaletåtgärder har utförts för att restaurera de korallrev som degraderats där utplantering ochövervakning av koraller är ett exempel. När förhållandena i haven ändras blir korallernaalltmer utsatta för såväl ökade temperaturer som ökad mängd predatorer och sjukdomar. Medtanke på denna bakgrund har detta projekt skapats för att se om utplacering av koraller inutieller nära ett territorium av Damselfish (Stegastes nigricans) utgör någon skillnad förkorallers överlevnadschans. Resultaten har visat att koraller som blir planterade utanförDamselfish-territoriet löper större risk att påträffa både predatorer och betare vilket leder tillatt dess levnadschanser minskar. Slutsatsen som drogs var därför att utplantering av korallerinuti ett Damselfish-territorium ökar korallernas chanser för överlevnad.  

Place, publisher, year, edition, pages
2023.
Series
TRITA-ABE-MBT ; 23488
Keywords [en]
Corals, Fiji, Damselfish, Ocean
Keywords [sv]
Koraller, Fiji, Frökenfisk, Hav
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-334977OAI: oai:DiVA.org:kth-334977DiVA, id: diva2:1792768
Educational program
Master of Science in Engineering - Energy and Environment
Supervisors
Examiners
Available from: 2023-08-30 Created: 2023-08-30 Last updated: 2023-09-07Bibliographically approved

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