?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Uji+Patogenisitas+dan+Studi+in+vivo+Bakteri+Biokontrol+Bacillus+sp.+D2.2+Terhadap+Vibrio+alginolyticus+pada+Pemeliharaan+Udang+Vaname+(Litopenaeus+vannamei)&rft.creator=+Sera+Hardiyani%2C+1014111019&rft.subject=Budidaya+.+Perikanan+.+Angling&rft.description=%0D%0AABSTRAK%0D%0A%0D%0A%0D%0AUJI+PATOGENISITAS+DAN+STUDI+IN+VIVO+BAKTERI+BIOKONTROL+%0D%0ABacillus+sp.+D2.2+TERHADAP+Vibrio+alginolyticus+PADA+PEMELIHARAAN%0D%0AUDANG+VANAME+(Litopenaeus+vannamei)%0D%0A%0D%0AOleh%0D%0ASERA+HARDIYANI%0D%0A%0D%0APenyakit+vibriosis+yang+disebabkan+oleh+bakteri+genus+Vibrio%2C+telah+lama+menjadi+masalah+utama+bagi+pelaku+industri+budidaya+udang+khususnya+pada+larva%2Fbenih+udang+karena+dapat+menyebabkan+tingkat+kematian+larva+udang+melebihi+70%25.+Kehadiran+bakteri+agen+biokontrol+dapat+dijadikan+solusi+bagi+permasalahan+pemberantasan+penyakit+untuk+menekan+pertumbuhan+bakteri+patogen.+Penggunaan+bakteri+biokontrol%2C+seperti+bakteri+Bacillus+sp.+D2.2+terbukti+mampu+membentuk+zona+hambat+terhadap+bakteri+V.+harveyi+secara+in+vitro.+Penelitian+ini+dilakukan+untuk+mengetahui+tingkat+patogenisitas+bakteri+biokontrol+Bacillus+sp.+D2.2+terhadap+udang+vaname+dan+kemampuannya+dalam+menghambat+pertumbuhan+bakteri+patogen+Vibrio+sp.+secara+in+vivo.+Bacillus+sp.+D2.2+disediakan+dengan+tingkat+kepadatan+103%2C+104%2C+105+dan+106+CFU%2Fml+untuk+diuji+patogenisitasnya+melalui+metode+LD50.+Hasil+LD50+menunjukkan+Bacillus+sp.+D2.2+tidak+bersifat+patogen+karena+tidak+ada+konsentrasi+bakteri+yang+mematikan+hingga+50%25+larva+udang+vaname.+Selanjutnya+uji+antagonisme+Bacillus+sp.+D2.2+terhadap+V.alginolyticus+dilakukan+secara+in+vivo+dengan+2+perlakuan+yaitu+pemeliharaan+udang+vaname+dengan+V.alginolyticus+105+CFU%2Fml+dan+pemeliharaan+udang+vaname+dengan+V.alginolyticus+yang+diuji+tantang+dengan+Bacillus+sp.+D2.2+105+CFU%2Fml.+Hasil+penelitian+menunjukkan+Bacillus+sp.+D2.2+mampu+menurunkan+pertumbuhan+V.alginolyticus+dari+105+CFU%2Fml+sampai+103+CFU%2Fml.+hal+tersebut+menjelaskan+bahwa+Bacillus+sp.+D2.2+berpotensi+sebagai+bakteri+biokontrol+yang+mampu+menurunkan+pertumbuhan+bakteri+patogen+V.alginolyticus.%0D%0AKata+kunci%3A+biokontrol%2C+Bacillus+sp.+D2.2%2C+larva+udang+vaname%2C+V.alginolyticus.%0D%0A%0D%0AABSTRACT%0D%0A%0D%0APHATOGENICITY+TEST+AND+IN+VIVO+STUDY+OF+BIOCONTROL+BACTERIA+Bacillus+sp.+D2.2+AGAINST+Vibrio+alginolyticus+IN+WHITE+SHRIMP+(Litopenaeus+vannamei)+REARING+SYSTEM%0D%0A+%0D%0A%0D%0ABy%0D%0ASERA+HARDIYANI%0D%0A%0D%0AVibriosis+disease+caused+by+bacteria+of+the+genus+Vibrio%2C+has+been+a+major+problem+for+the+shrimp+aquaculture+industry%2C+especially+in+the+larvae+%2F+seed+shrimp+because+it+can+cause+larval+shrimp+mortality+rate+exceeds+70%25.+The+presence+of+bacterial+biocontrol+agents+can+be+used+as+a+solution+to+decrease+the+growth+of+pathogenic+bacteria.+The+use+of+biocontrol+bacteria%2C+such+as+Bacillus+sp.+D2.2+was+proved+to+be++able+to+form+a+zone+of+inhibition+against+V.+harveyi+bacteria+in+vitro.+This+study+was+conducted+to+determine+the+degree+of+pathogenicity+of+biocontrol+bacteria+Bacillus+sp.+D2.2+to+white+shrimp+and+its+ability+to+inhibit+the+growth+of+pathogenic+bacteria+Vibrio+sp.+in+vivo.+Bacillus+sp.+D2.2+supplied+with+density+103%2C+104%2C+105+and+106++CFU%2Fml+were+tested+for+pathogenicity+through+LD50+method.+The+results+showed+that+Bacillus+sp.+D2.2+wasn%E2%80%99t+pathogenic+because+there+was+no+bacteria+concentrations+that+caused+lethal+to+50%25+of+white+shrimp+larvae.+Further+antagonism+tests+of+Bacillus+sp.+D2.2+against+V.alginolyticus+performed+in+vivo+with+2+treatments%2C+i.e+white+shrimps+reared+with+additional+V.alginolyticus+105+CFU%2Fml+and+white+shrimps+reared+with+additional+V.alginolyticus+then+challenged+with+Bacillus+sp.+D2.2+at+the+same+density.+The+results+showed+that+Bacillus+sp.+D2.2+was+able+to+reduce+the+growth+of+V.alginolyticus+from+105+CFU%2Fml+to+103+CFU%2Fml.+It+was+explained+that+Bacillus+sp.+D2.2+has+a+potency+as+biocontrol+agent+bacteria+to+reduce+pathogenic+bacterial+growth.%0D%0AKeywords%3A+biocontrol%2C+Bacillus+sp.+D2.2%2C++white+shrimp+larvae%2C+V.alginolyticus%0D%0A&rft.publisher=FAKULTAS+PERTANIAN&rft.date=2014-10-27&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F2%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F3%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F4%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F5%2FABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F6%2FCOVER%2520DALAM.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F7%2FLEMBAR%2520PERSETUJUAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F4793%2F8%2FLEMBAR%2520PENGESAHAN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