Advances in Tropical Biodiversity and Environmental Sciences最新文献_第6页

Malassezia sp. Infection Prevalence in Dermatitis Dogs in Badung Area 巴东地区皮炎犬马拉色菌感染流行病学研究

Advances in Tropical Biodiversity and Environmental Sciences Pub Date : 1900-01-01 DOI: 10.24843/atbes.2021.v05.i02.p02

Putu H Sudipa, Ketut Tono Pasek Gelgel, Putu Devi Jayanti

引用次数: 1

Effect of Thiophenone Compound on Motility and Caseinase Production of Aeromonas hydrophila 噻吩酮化合物对嗜水气单胞菌运动和酪酶产生的影响

Advances in Tropical Biodiversity and Environmental Sciences Pub Date : 1900-01-01 DOI: 10.24843/atbes.2021.v05.i02.p01

Ayu Ashari Margareth Sinaga, Pande Gde Sasmita Julyantotro, D. Pebriani

{"title":"Effect of Thiophenone Compound on Motility and Caseinase Production of Aeromonas hydrophila","authors":"Ayu Ashari Margareth Sinaga, Pande Gde Sasmita Julyantotro, D. Pebriani","doi":"10.24843/atbes.2021.v05.i02.p01","DOIUrl":"https://doi.org/10.24843/atbes.2021.v05.i02.p01","url":null,"abstract":"Motility and caseinase production are part of bacterial virulence factors which are regulated by a bacterial intercellular communication system, often called quorum sensing (QS). This study aims to determine the effect of the QS inhibitor compound thiophenone in reducing those virulence factors. This research was conducted at the Laboratory of Fisheries Science, Faculty of Marine Science and Fisheries, Udayana University, from December 2019 to March 2020. This study tested 3 different treatments with 3 repetitions for each treatment. Treatment A as control (without the addition of thiophenone), treatment B (addition of 5 ?M thiophenone), and C treatment (addition of 10 ?M thiophenone). The results showed that thiophenone compounds can inhibit the QS system of Aeromonas hydrophila. It can be seen from the significantly reduced (P<0.05) motility and caseinase enzyme activity of A. hydrophila compared to without addition of thiophenone compounds. The average diameter of the caseinase enzyme production produced in treatment A at 22 hours was 21.40±0.36 mm, in treatment B was 19.70±0.2 mm and in treatment, C was 17.87±0.05 mm. Whereas in motility, the resulting average diameter in treatment A at 22 hours was 6.57±0.61 mm, in treatment B was 5.67±0.35 mm and in treatment, C was 5.10±0.6 mm. These results indicate that the QS thiophenone inhibitor compound can reduce virulence factors, namely motility and caseinase production from pathogenic bacteria A. hydrophila. Treatment C can decrease virulence factors compared to treatment A and B.","PeriodicalId":432816,"journal":{"name":"Advances in Tropical Biodiversity and Environmental Sciences","volume":"482 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Different Stocking Densities on the Growth and Survival Rate of Tilapia (Oreochromis niloticus) Seeds in Batur Lake Floating Net Cages 不同放养密度对巴图湖浮网箱罗非鱼种子生长和成活率的影响

Advances in Tropical Biodiversity and Environmental Sciences Pub Date : 1900-01-01 DOI: 10.24843/atbes.2021.v05.i02.p03

Hikmah Nurazizah, I. W. Arthana, Gde Raka Angga Kartika

{"title":"Effect of Different Stocking Densities on the Growth and Survival Rate of Tilapia (Oreochromis niloticus) Seeds in Batur Lake Floating Net Cages","authors":"Hikmah Nurazizah, I. W. Arthana, Gde Raka Angga Kartika","doi":"10.24843/atbes.2021.v05.i02.p03","DOIUrl":"https://doi.org/10.24843/atbes.2021.v05.i02.p03","url":null,"abstract":"Stocking density is an important factor in cultivation, it can save land use, and increase the efficiency of fish farming. The purpose of this research was to determine the different density information on tilapia seeds measuring 2-3 cm as an alternative to using tilapia (O. niloticus) seeds 7-9 cm in size so that they can be developed in Batur Lake. The research was conducted in January - March 2020 in the floating net cages in Trunyan Kintamani village, Bangli, Bali. The research used a completely randomized design method with three treatments and three repetitions. The Tilapia seeds used are 2-3 cm with different stocking densities, 100 ind/m3, 150 ind/m3, and 200 ind/m3. The parameters observed were SGR (Specific Growth Rate), absolute growth, SR (Survival Rate), FCR (Feed Conversion Ratio), and water quality including temperature, DO, pH, TDS. The results of this study indicated that stocking density did not have a significant effect on the growth and survival rate of tilapia seeds, because the temperature was too cold so that the tilapia seeds failed to adapt properly at the beginning of stocking and the physiological conditions of the fish were disturbed so that the fish experienced stress and went to died. Water quality parameters measured include temperature with a range value of 25.86-25.880C, pH with a range value of 9.08-9.13, DO (Dissolved oxygen) with a range value of 7.9-8 mg/L, and TDS (Dissolved solids) with a range value of 1040.25-1041.58 mg/L.","PeriodicalId":432816,"journal":{"name":"Advances in Tropical Biodiversity and Environmental Sciences","volume":"34 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132832517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Structure of Macrozoobenthos Community as a Bioindicator of Water Quality in Gilimanuk Bay, Jembrana Regency, Bali 巴厘岛Jembrana Regency Gilimanuk湾大型底栖动物群落结构及其对水质的指示作用

Advances in Tropical Biodiversity and Environmental Sciences Pub Date : 1900-01-01 DOI: 10.24843/atbes.2021.v05.i02.p04

Yohana Christanti Ndale, I. W. Restu, N. Wijayanti

{"title":"The Structure of Macrozoobenthos Community as a Bioindicator of Water Quality in Gilimanuk Bay, Jembrana Regency, Bali","authors":"Yohana Christanti Ndale, I. W. Restu, N. Wijayanti","doi":"10.24843/atbes.2021.v05.i02.p04","DOIUrl":"https://doi.org/10.24843/atbes.2021.v05.i02.p04","url":null,"abstract":"Gilimanuk Bay is a water area located in Melaya District, Jembrana Regency, West Bali Region. In this area, there are development and human activities that have an impact on the quality of the waters so that they interfere with the life of organisms such as macrozoobenthos. Macrozoobenthos can be the bioindicator that determining the condition in a water area. The decline of the macrozoobenthos community structure is an indicator of a disturbance in the ecosystem in these waters. The purpose of this research to know how community structure of macrozoobenthos and the condition of the water quality in Gilimanuk Bay. This research was conducted in June to July 2020. The research used the quantitative descriptive method, with 3 of the research stations. Based on the result of the research, it has found 45 species of macrozoobenthos that included from 5 classes, there are Gastropods, Bivalves, Crustaceans, Polychaeta and, Sipunculidea. The highest total abundance was at station 3, namely 534.33 ind/m2, station 1 is 522.00 ind/m2 and the lowest abundance is at station 2, namely 371.33 ind/m2. The diversity index obtained was classified as moderate, which ranges from 1.53-1.89, the uniformity index is classified as moderate, which ranges from 0.47-0.57, while the dominance index is low to moderate, which ranges from 0.29-0.44. Based on the macrozoobenthos community structure and the interrelation with water quality, Gilimanuk Bay is classified as moderately polluted waters.","PeriodicalId":432816,"journal":{"name":"Advances in Tropical Biodiversity and Environmental Sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124803006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2