The production of Gracilaria sp is still not optimal and there are some opportunities left for production improvement by developing methods that use depth level as a planting media. A vertikultur method using bag nets is more effective and has higher production levels. This research aims to solve problems in cultivating Gracilaria sp seaweed by doing field optimization. Seaweeds were planted as many as 40 points for each 10 levels depth (BRL); 0, 70, 140, 210, 280, 350, 420, 560, and 630 cm from the surface. Environment and seaweed parameters were measured weekly. This research measures daily and weekly growth rate, absolute growth, and the total production. The data were analyzed using Anota test and BNJ further test. The research result shows that physic-chemistry water parameter is suitable for cultivating Gracilaria sp. The lowest weekly growth rate occurred in level BRL 10 in the first week while gaining weight as much as 9.351 gram/week. The highest growth rate occurred in level BRL 4 on the sixth week while gaining weight as much as 32.25 gram/week. The biggest absolute growth occurred in level BRL 4 with 214.87 gram and the lowest occurred in level BRL 10 with 161.45 gram. The biggest absolute growth rate occurred in level BR1 4 while gaining weight as much as 139.87 gram from the original weight and the lowest occurred in level BRL10 with 86.45 gram from the original weight. The best daily growth rate occurred in level BRL 4 with a growth rate of 2.53%/day and the lowest occurred in BRL 10 with 1.84%/day. Total production of Gracilaria sp from level BR1 1 -BR1 10 is 74,840 gram. The biggest production was obtained from level BRL 4 with the production of 8595 gram and the lowest in BRL 10 with 6458 gram. According to the anova test result and beda nyata jujur (BNJ), it shows that depth level (BR1 1 -BR1 10) gave no influence towards the growth rate of Gracilaria sp in the water of Kelagian Island. The vertikultur method by making use of depth level is both feasible and profitable for seaweed cultivators with production level ten times bigger.
Marine biota has variety of bioactive compound that is potential to be an antibacterial for shrimp ponds diseases. Some of marine biota has potential as antibacterial i.e. soft coral Sarcophyton sp., Sponge Aaptos sp., seaweeds Sargassum sp. and Halimeda sp. and mangroves Avicennia sp. and Rhizophora sp. species. This study is purposed to find the most potential marine biota as antibacterial. The research method was as follows; sampling, sample identification, extraction and antibacterial activity test. The results is soft coral and sponge extract Sarcophyton sp. has bioactivity against of shrimp bacteria pathogen such as Vibrio spp2. bacteria for around 6.3±0.1 mm, while Aaptos sp. has bioactivity against Vibrio spp1. bacteria for around 7.9+0.1 mm, Vibrio spp2. bacteria for around 7.2± 0.1 to 7.9±0.1 mm, Vibrio spp6. bacteria for around 7.5±0.2 mm, Escherichia coli for around 7.2±0.1 mm and Staphylococcus aureus for around 15.9±0.2 mm. Seaweed extract activity found only of Sargassum sp. which has antibacterial activity against for around 7.1±0.0 mm for Vibrio spp6. and mangrove species activity has Rhizophora sp. extract which has bioactivity against Vibrio spp4. were 7.3±0.1 mm and E. coli bacteria were 6.7±0.1 mm. The most potential marine biota as antibacterial is showed on sponge Aaptos sp.. with an inhibitory zone for around 15.9±0.2 mm (for S. aureus bacteria). ABSTRAKBiota laut memiliki beragam senyawa bioaktif yang berpotensi untuk dijadikan antibakteri pada penyakit udang tambak. Beberapa biota yang memiliki potensi antibakteri yaitu spesies karang lunak Sarcophyton sp., sponge Aaptos sp., rumput laut Sargassum sp. dan Halimeda sp. dan mangrove Avicennia sp. dan Rhizophora sp. Penelitian ini bertujuan untuk menemukan biota laut yang paling berpotensi sebagai antibakteri. Metode yang dilakukan meliputi pengambilan sampel, identifikasi sampel, ekstraksi dan uji aktifitas antibakteri. Hasil yang ditemukan adalah bahwa ekstrak karang lunak Sarcophyton sp. memiliki bioaktifitas terhadap bakteri penyakit udang Vibrio spp2. berkisar 6,3±0, mm, sedangkan Aaptos sp. memiliki bioaktifitas terhadap bakteri Vibrio spp1. berkisar 7. 9+0,1 mm, Vibrio spp2. berkisar 7,2± 0,1 to 7,9 ±0,1 mm, Vibrio spp6. berkisar 7,5±0,2 mm, E. coli berkisar 7,2±0,1 mm dan S. aureus berkisar 15,9±0,2 mm. Aktivitas antibakteri ekstrak rumput laut ditemukkan hanya pada Sargassum sp. yang memiliki aktifitas antibakteri sekitar 7,1±0,0 mm terhadap bakteri Vibrio spp6. dan ekstrak mangrove Rhizopora sp. memiliki bioaktifitas terhadap bakteri Vibrio spp4. sekitar 7,3±0,1 mm dan E. coli sekitar 6,7±0,1 mm. Biota laut yang paling berpotensi sebagai antibakteri adalah sponge Aaptos sp. dengan zona hambat berkisar 15,9±0,2 mm (untuk bakteri S. aureus). Kata kunci: karang lunak, mangrove, pulau Maspari, rumput laut, senyawa bioaktif, sponge Antibacterial Activity as Inhibitors Pathogen Bacterial on . . . http://journal.ipb.ac.id/index.php/jurnalikt 618 I.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.