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Karakterisasi Molekuler Bakteri Probiotik Ikan Kerapu Bebek Berbasis Teknik 16S Ribosomal DNA Feliatra, Feliatra; Andrito, Wahyudi
Jurnal Natur Indonesia Vol 10, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (95.052 KB) | DOI: 10.31258/jnat.10.1.13-17


The aim of research was to find the molecular characteristics of probiotic bacteria in the digestive tract of grouper fish (Chromileptes altivelis) based on 16S ribosomal DNA technique. The bacteria were isolated from stomach and intestine of the fish and were analized in the Marine Microbiology Laboratory of fishery and marine Science Faculty of Riau University. The bacterial DNA were isolated by using a PCR (polymerase Chain Reaction) and was conducted in the biotechnology laboratory of Diponegoro University, Semarang. The purified DNA was sequenced in the BPPTTangerang. Result shown that 6 bacterial species may be potential as probiotic. There were Bacillus velesensis strain CR-11, Vibio alginolyticus A3G-2, Bacillus cereus site2S, uncultured bacterium clone BB3S16S-17, Bacillus subtillus strain CICC10066, and Bacillus flexus strain LF-3. these bacteria grow well at pH 2 and this indicated one of probiotic bacteria characteristics.
Kondisi mangrove di pesisir timur pulau Jemaja Kepuluan Anambas Andrito, Wahyudi; Nasution, Syafruddin; Efriyeldi, Efriyeldi
Dinamika Lingkungan Indonesia Vol 7, No 2 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.776 KB) | DOI: 10.31258/dli.7.2.p.70-80


 Mangrove ecosystems are one of three important ecosystems in the coastal areas that supports global warming mitigation efforts. The existence of mangrove forests is needed to reduce the increased CO2 concentrations in the atmosphere. However, the rise of the water temperatures and sea levels indirectly affects the presence and condition of mangrove forests in coastal areas. The purpose of this study is to determine the condition of the mangrove community on the East Coast of Jemaja, Anambas Archipelagoes Regency. The survey method  was used in this study and a series survey activities were conducted for a quadrant transect with a size of 10m by 10m in December 2019 - March 2020.The result shown that the five mangrove species were identified, such as Rhizophora apiculata, R. mucronata, Bruguiera gymnorrhiza, Ceriops tagal and Xylocarpus granatum. R. apiculata dominates with an important value index of 123.12%. While, the average density of mangroves and saplings in the study area was 3155 ± 785 individuals/ha and the average canopy cover was 84.03 ± 3.11%. With this finding, it can be concluded that the condition of mangroves in the East Coast of Jemaja is very dense and still in a good condition.