?url_ver=Z39.88-2004&rft_id=2014111039&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=UJI+AKTIVITAS+ENZIMATIK+DAN+IDENTIFIKASI+BAKTERI%0D%0AKANDIDAT+PROBIOTIK+DARI+GASTROINTESTINAL+NILA%0D%0AOreochromis+niloticus+(Linnaeus%2C+1758)+DANAU+RANAU%2C+LAMPUNG%0D%0ABARAT&rft.creator=RIKA+IWAN+%2C+SYAHPUTRI+&rft.subject=630+Pertanian+dan+teknologi+yang+berkaitan&rft.description=Ikan+nila+(Oreochromis+niloticus)+yang+dibudidayakan+di+Danau+Ranau%2C%0D%0ALampung+Barat%2C+memiliki+keunggulan+yaitu+ukuran+yang+lebih+besar+sekitar+500%0D%0Ahingga+600+g+per+ekor%2C+rasa+yang+lebih+gurih%2C+daging+yang+tebal%2C+dan+tidak+berbau%0D%0Alumpur.+Keunggulan+tersebut+sangat+mungkin+dipengaruhi+oleh+adanya+bakteri+di%0D%0Adalam+ikan+yang+dapat+dijadikan+sebagai+bakteri+probiotik.+Tujuan+dari+penelitian%0D%0Aini+untuk+memperoleh+isolat+bakteri%2C+mengevaluasi+aktivitas+enzimatik%2C+dan+mendapatkan%0D%0Abakteri+kandidat+probiotik+dari+gastrointestinal+ikan+nila+(Oreochromis%0D%0Aniloticus)+yang+dibudidayakan+di+Danau+Ranau%2C+Lampung+Barat.+Penelitian+ini%0D%0Amenggunakan+metode+eksploratif+dengan+isolasi+bakteri%2C+identifikasi%2C+dan+uji+aktivitas%0D%0Aenzimatik.+Hasil+penelitian+menunjukkan+bakteri+yang+diisolasi+dari+gastrointestinal%0D%0Aikan+nila+Ranau+diperoleh+12+isolat+bakteri.+Sebanyak+10+isolat+bakteri%0D%0Amenghasilkan+aktivitas+amilase%2C+12+isolat+bakteri+menghasilkan+aktivitas+lipase%0D%0Adan+protease+yang+ditunjukkan+dengan+terbentuknya+zona+bening+disekeliling%0D%0Akoloni+bakteri.+Isolat+bakteri+UNR.11+menunjukkan+ketiga+aktivitas+enzimatik%0D%0Adengan+zona+bening+terbesar+yaitu+25%2C5+%C2%B1+2%2C80+mm+pada+enzimatik+amilase%2C+20%2C4%0D%0A%C2%B1+1%2C2+mm+pada+enzimatik+lipase%2C+dan+22%2C7+%C2%B1+4%2C06+mm+pada+enzimatik+protease.%0D%0ABerdasarkan+identifikasi+bakteri+melalui+uji+makroskopis%2C+mikroskopis%2C+biokimia%2C%0D%0Adan+analisis+sekuens+16S+rDNA%2C+isolat+bakteri+terindentifikasi+merupakan+Bacillus%0D%0Acereus+UNR.11+dengan+kemiripan+tertinggi+sebesar+99%25.+Bacillus+cereus+UNR.11%0D%0Aberpotensi+sebagai+kandidat+probiotik+memiliki+aktivitas+enzimatik+pencernaan%2C%0D%0Aamilase%2C+lipase%2C+dan+protease.%0D%0AKata+Kunci+%3A+Aktivitas+Enzimatik%2C+Bakteri+Probiotik%2C+Gastrointestinal%2C+Ikan+Nila%0D%0A%0D%0AThe+tilapia+(Oreochromis+niloticus)+cultivated+in+Lake+Ranau%2C+West%0D%0ALampung%2C+had+several+advantages%2C+including+larger+sizes+of+about+500+to+600+g+per%0D%0Afish%2C+a+richer+taste%2C+thicker+flesh%2C+and+no+muddy+smell.+These+advantages+were%0D%0Alikely+influenced+by+the+presence+of+probiotic+bacteria+in+the+fish.+The+purpose+of%0D%0Athis+study+was+to+isolate+bacteria%2C+evaluated+enzymatic+activities%2C+and+identify%0D%0Aprobiotic+candidate+bacteria+from+the+gastrointestinal+tract+of+tilapia+(Oreochromis%0D%0Aniloticus)+raised+in+Lake+Ranau%2C+West+Lampung.+This+research+employed+an%0D%0Aexploratory+method+with+bacterial+isolation%2C+identification%2C+and+enzymatic+activity%0D%0Atesting.+The+results+showed+that+12+bacterial+isolates+were+obtained+from+the%0D%0Agastrointestinal+tract+of+tilapia+from+Lake+Ranau.+10+bacterial+isolates+exhibited%0D%0Aamylase+activity%2C+while+all+12+showed+bacterial+isolates+lipase+and+protease+activities%2C%0D%0Aindicated+by+the+formation+of+clear+zones+around+the+bacterial+colonies.+The%0D%0Abacterial+isolate+UNR.11+exhibited+all+three+enzymatic+activities+with+the+largest%0D%0Aclear+zones+25%2C5+%C2%B1+2%2C80+mm+for+amylase+activity%2C+20.4+%C2%B1+1.2+mm+for+lipase+activity%2C%0D%0Aand+22.7+%C2%B1+4.06+mm+for+protease+activity.+Based+on+the+bacterial+identification%0D%0Athrough+macroscopic%2C+microscopic%2C+biochemical+tests%2C+and+16S+rDNA+sequencing%0D%0Aanalysis%2C+the+bacterial+isolate+was+identified+as+Bacillus+cereus+UNR.11+with+the%0D%0Ahighest+similarity+of+99%25.+Bacillus+cereus+UNR.11+has+as+the+potential+as+a+probiotic%0D%0Acandidate+with+digestive+enzymatic+activities+of+amylase%2C+lipase%2C+and%0D%0Aprotease.%0D%0AKeywords%3A+Enzymatic+Avtivity%2C+Probiotic+Bacteria%2C+Gastrointestinal%2C+Tilapia&rft.publisher=FAKULTAS+PERTANIAN&rft.date=2025-02-28&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F86280%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F86280%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F86280%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++RIKA+IWAN+%2C+SYAHPUTRI+++(2025)+UJI+AKTIVITAS+ENZIMATIK+DAN+IDENTIFIKASI+BAKTERI+KANDIDAT+PROBIOTIK+DARI+GASTROINTESTINAL+NILA+Oreochromis+niloticus+(Linnaeus%2C+1758)+DANAU+RANAU%2C+LAMPUNG+BARAT.++FAKULTAS+PERTANIAN%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F86280%2F