cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ronal Kurniawan
Contact Email
kurniawanronal5@gmail.com
Phone
-
Journal Mail Official
natur@ejournal.unri.ac.id
Editorial Address
Kampus Bina Widya KM. 12,5 Simpang Baru, Tampan, Pekanbaru 28293 Indonesia
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Natur Indonesia
Published by Universitas Riau
ISSN : 14109379     EISSN : 25030345     DOI : https://doi.org/10.31258/jnat
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Physics
Jurnal Natur Indonesia has been published since 1998, is a science journal that presents articles on research results, thoughts and views from researchers and experts in biosciences (basic science), including biology, physics, chemistry and mathematics. Jurnal Natur Indonesia involves reviewers who review each article according to their field of knowledge. The names and institutional origins of the Reviewers are listed on the normal two pages of each volume of publication. The journal is published twice a year, in April and October. In the field of biosciences (basic science) Biology, Physics, Chemistry, Mathematics.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 84 Documents
 4   5   6   7   8 
The Indication of Gastropods Extinctions at Intertidal Zone of the Teluk Nipah Waters, the Pesisir Selatan Regency the Province of the West Sumatera Afrizal Tanjung
Jurnal Natur Indonesia Vol. 21 No. 1 (2023): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.1.69-74

Abstract

Intensive observation of gastropods, every March from the year 2008 to the year 2012, was carried out to document some indicators of gastropod extinction. The purposive sampling technic was used in this work. The physicochemical parameters of its habitat were also monitored during every sampling done. It was found that the intertidal substrate consist of sand, while the habitat parameters were more than 5,6 mg/L dissolved oxygen, pH around 7,0-7,2, salinity 30,2-32,2 ppt, temperature 28,6-29,60C, the visibility 100%. The number of species, the number of found gastropods, the abundance, and the maximum shell size of found gastropods showed decreasing from year to year, while routine collecting by the visitor and the marine organism shell collector, and the disturbance by the fisherman activities occurred. This indication showed a tendency for gastropods extinction.
Feasibility Assessment of Mangrove in Two Villages on Bengkalis Island for Ecotourism Aryodamar Muhammad Jati; Nurul Qomar; Defri Yoza
Jurnal Natur Indonesia Vol. 21 No. 1 (2023): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.1.75-80

Abstract

Mangroves are a unique ecosystem that has an important role both bio-physically and socio-economically. Unfortunately, this ecosystem has suffered damage due to various forms of unwise use. Alternatively, the use of mangroves for ecotourism is often seen as more environmentally friendly and sustainable. On the other hand, some factors limit the success of mangrove ecotourism management. One of the most important factors is the feasibility of the mangrove itself as a capital for ecotourism. This study aims to evaluate the characteristics of mangroves in two villages on Bengkalis Island as ecotourism resources and to analyze their suitability as an ecotourism attraction. Data were collected through direct observation and interviews in Kuala Alam and Pematang Duku Village in Bengkalis District, Bengkalis Regency, Riau Province. The feasibility is analyzed using the Tourism Suitability Index (TSI) based on parameters that have been set by the TSI. The mangroves in Kuala Alam have an average cover thickness of 337 m, with a density of 300 trees/ha, which are composed of nine tree species. Mangroves in Pematang Duku have an average cover thickness of 948 m, with a density of 500 trees/ha, consisting of 14 tree species. The mangrove fauna found in the two villages is generally the same, as with the tidal pattern. The mangroves in Kuala Alam Village achieve a score of 1.75 which means they do not have tourism suitability (TSI<2) while mangroves in Pematang Duku achieve a score of 2.38 which meet the criteria to develop mangrove ecotourism (TSI>2).
Comparative Morphometric Rhizophora ApiculataFlower and Fruit in Two Areas with Anthropogenic Activities in West Dumai Coastal, Dumai City, Riau Province Muhammad Zebi Fernando; Efriyeldi Efriyeldi; Aras Mulyadi
Jurnal Natur Indonesia Vol. 19 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.23-38

Abstract

Morphometrics is a field that deals with variations and changes in the form (size and shape) of an organism or object. Anthropogenic is a human activity not only limited to the use or utilization of coastal resources, but also can be restorative and protective, thus causing complex disruption. The purpose of this study was to determine the morphometric differences of the flowers and fruits of R.apiculata mangroves in two regions with different anthropogenic activities in the mangrove ecosystem of Dumai City. This research was carried out in September 2019. From the results of the study it was found that in areas polluted by anthropogenic activity the average morphometrics of fruit (length and width) and leaves (length, width and length of the stems) Rhizophora apiculata were lower than those in the area not polluted by anthropogenic activity. At station I the oil content ranged from 0,0975 to 0,1251 ppm classified as polluted and at station II ranged from 0,072 to 0,111 ppm classified as not polluted.
Maintenance of Bilge Pump on Ship Trawl SPL IX Owned PT. Sinar Pesona Laut Saridu, Muhammad Al Mu’Min; Ziliwu, Boby Wisely
Jurnal Natur Indonesia Vol. 20 No. 2 (2022): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/20.2.35-40

Abstract

A pump is a machine or device that raises liquid from a low surface to a higher surface or moves liquid from a low-pressure to a high-pressure area. A centrifugal pump is a machine or equipment used to provide energy to a fluid (liquid) based on the centrifugal force generated by a rotating impeller. So that the liquid can be moved or moved from one place to another. As it receives energy through the impeller, the fluid velocity will increase. This kinetic energy is then converted into compressive energy by the pump housing (casing) in the form of a spiral (volute) or a centrifugal pump or fixed blades (diffuser) surrounding the impeller so that the liquid exits the pump at a high speed. The maintenance method for the bilge pump auxiliary machine is carried out in 6 stages, namely, the first stage opening the filter box, the second stage removing the inner filter and filter box cover gasket, the third stage installing new anti-rust on the inside of the filter box cover, the fourth stage removing the box filter connecting faucet and the bilge pump pipeline, the fifth stage opens the connection of the pipe and the bilge pump, the sixth stage ensures that all components of the bilge pump are firmly installed and perform operational test
Response of Light Intensity to the Carotenoid Content of Sea Grape Caulerpa sp. Rina Rosnawati; Nunik Cokrowati; Nanda Dinarti
Jurnal Natur Indonesia Vol. 20 No. 2 (2022): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.20.2.41-49

Abstract

Caulerpa sp. is a green alga that grows naturally in Indonesian waters. Caulerpa sp. grows in shallow seas with calm currents and attaches to coral substrates or sand substrates and rock fragments. In Indonesia, this alga is widely used as a food ingredient. Caulerpa sp. Contains lignan which is beneficial to human health, namely its ability to prevent the growth of cancer cells. This study aims to determine the difference in the number of carotenoids in Caulerpa sp. with different light intensities using controlled containers at the Laboratory of Fish Production and Reproduction, University of Mataram. The method used was experimental with a Randomized Block Design (RAK) with 30 days of maintenance. The results showed the growth of Caulerpa sp. highest in treatment D (3 light 3000 lux) with an average absolute growth of 80 g, specific growth of 0,92 %, stolon length of 6,4 cm, and the highest carotenoid content. The lowest growth value was in treatment A (1 light 500 lux) with an absolute growth value of 35 cm, specific growth of 0,44%, stolon length of 4,6 cm, formula length 2,6 carotenoid content of 0.15 mg/g.
Inhibition Zone Test of Chaetomorpha sp. Extract Against Aeromonas hydrophilla and Vibrio sp. Bacteria Sri Wahyuni; Mohamad Gazali; Ronal Kurniawan
Jurnal Natur Indonesia Vol. 20 No. 2 (2022): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.20.2.50-54

Abstract

Chaetomorpha sp. is a green algae that has anti-bacterial compounds and at certain times found very much. The purpose of this study was to see the inhibition zone produced from the ethanol extract of Chaetomorpha sp. against A. hydrophilla and Vibrio sp. This research was done in March 2022. Extraction of Chaetomorpha sp., antibacterial effectiveness testing was done at the Biotechnology Laboratory, Faculty of Fisheries and Marine, Riau University. The method used is descriptive method. Sensitivity test was performed using the Kirby Bauer disc method. To reduce the error rate, it was repeated three times. The doses of macroalgae extract used were, doses of 100% (10,000 ppm), 90% (9,000 ppm), 80% (8,000 ppm), 70% (7000 ppm), 60% (6000 ppm), 50% (5000 ppm), 40% (4000 ppm), 30% (3000 ppm), 20% (2000 ppm), 10% (1000 ppm) and control (Oxytetracycline). Based on the observations, it was found that the use of ethanol extract of Chaetomorpha sp. The result is able to inhibit the growth of bacteria A. hydrophilla and Vibrio sp. at the highest dose (10000 ppm) in an range of 13.5 -14.5 mm which was classified as strong category, the lowest dose was at 5000 ppm as moderate category.
The Effects of Turmeric Powder Addition in Fish Feed toward Hematology of Common Carp (Cyprinus carpio Putri Pridayem; Windarti Windarti; Dian Fitria M
Jurnal Natur Indonesia Vol. 20 No. 2 (2022): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.20.2.55-63

Abstract

Turmeric (Curcuma longa) contains curcumin that can be used to improve the health as well as the immune system of the fish. The health and immune system condition of the fish can be predicted based on the hematology of the fish. A study that aims to understand the effects of turmeric addition in fish feed pellets on the hematology condition of common carp has been conducted from March to May 2022. The turmeric powder was mixed well with the feed pellets and the dosages of the turmeric powder were as follows: 0 (Control, no turmeric addition), P1 (0.5 g/kg), P2 (1 g/kg), and P3 (1.5 g/kg). The fish was reared in circular plastic containers (25 L), completed with an aerator and circulation pump) for 49 days, 15 fish/ container. During the research, the fish was fed 3 times/ day, at satiation. Samplings were conducted 2 times before the treatment was applied and by the end of the experiment (the 49th day). Results show that the addition of turmeric powder in the fish feed pellets clearly affects the hematological of the fish. Fish that was fed with turmeric-enriched pellets showed a higher percentage of lymphocyte and which means that the immunity of the fish is improved. The best treatment P3 showed 81.55% lymphocyte, 6.55% monocyte, 5.44% neutrophil, and 5.44% thrombocyte. Data obtained indicate that the fish fed with turmeric pellets perform better in hematological conditions than the fish with no turmeric-enriched pellets.
Utilization of Tofu Liquid Waste as Organic Fertilizer on the Growth and Production of Paddy Rice Plants (Oryza sativa L) Wili Heriko; Tri Nopsagiarti; Angga Pramana
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.2.57-64

Abstract

This research has been carried out in Kedundung Island Village, Central Kuantan District, Kuantan Singingi Regency. This research takes place for approximately four months starting from November 2017 until March 2018. This study aims to determine the effect of Tofu Liquid Waste as Liquid Organic Fertilizer on Plants and Production of Paddy Rice (Oriza sativa L). The parameters observed in this study include: plant height, age of flowering, age of harvest, number of productive tillers, and dry grain weight. This study aims to determine the effect of Tofu Liquid Waste as Organic Fertilizer on the Growth and Production of Rice Field Crops. The design used in this study is a Non Factorial Randomized Block Design (RBD) consisting of one factor, namely factor A (Tofu Liquid Waste) consisting of 4 levels: A0 (control), A1 (600 mL/plot), A2 (1200 mL/plot), A3 (1800 mL/plot). The observational data from each treatment were statistically analyzed and continued with the Next Test of Honestly Significant Difference at the 5% level. The results showed that the Tofu Liquid Waste treatment had a significant influence on the parameters of observation of Plant Height, Flowering Age, Harvest Age, Number of Productive Tillers and Dry Grain Weight. The best treatments were A3 for observation of Plant Height (124.91 cm), Flowering Age (73.99 days), Harvest Age (95.74 days), Number of Productive Tillers (50.91 stems), and Dry Grain Weight (100.16 g)
Histopathology of the Gill of Pangasianodon hypophthalmus that were Fed with Fermented Red Ginger to Prevent Motile Aeromonas Septiceamia Disease Muhammad Arga Saputra; Morina Riauwaty; Henni Syawal
Jurnal Natur Indonesia Vol. 20 No. 2 (2022): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.20.2.64-72

Abstract

Red ginger is a natural ingredient that contains several antibacterial compounds such as essential oils, flavonoids, terpenoids, phenols, and zingiberene. This research was conducted from June to August 2021. The purpose of this study was to analyze the structure of the gill and liver tissue of jambal siam fish and to obtain the best dose of adding fermented red ginger to the feed before and after being challenged with Aeromonas hydrophila bacteria. The method used is an experimental method using a one-factor Completely Randomized Design (CRD) with five treatment levels and three replications, namely: Feeding without fermentation of red ginger and without being tested against A. hydrophila (Kn), Feeding without fermentation of red ginger and tested against A. hydrophila (Kp), Feeding with a dose of 150 mL/kg (P1), dose 175 mL/kg feed (P2), dose 200 mL/kg (P3). The results showed that the structure of the gill tissue of Jambal Siam fish showed damage such as hypertrophy, hyperplasia and bent lamellae. The best results were found in the P2 treatment, a dose of 175 mL/kg feed and tested against A.hydrophilla bacteria
The Productivity Improvement and Population Growth of Payakumbuh Duck (Anas platyrhynchos domestication) Using a Simple Aspirator Tool on Artificial Insemination (AI) Technology Tertia Delia Nova; Suhartati Suhartati; Azhar Azhar
Jurnal Natur Indonesia Vol. 20 No. 1 (2022): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.20.1.1-8

Abstract

This study aimed to determine the effect of IB frequency using different simple aspirator on fertility, weight loss and hatchability of Payakumbuh duck (Anas platyrhynchos domestication) eggs. This study used 8 male and 20 female ducks, 90% egg production. In this study, all hatched the hatched eggs. This study used an experimental method with a completely randomized design (CRD) with 4 treatments and 5 replications. The treatments consisted of: P1 is 1 x 2 days, P2 is 1 x 4 days, P3 is 1 x 6 days, P4 is 1 x 8 days; the parameters observed were fertility, weight loss and hatchability. The results of the analysis of variance showed that different AI frequencies had a significant effect (P < 0.05) on the fertility of hatching eggs, but had no significant effect (P > 0.05) on weight loss and hatchability. It can be concluded that P2 had a significant effect (P < 0.05) on fertility because fertile eggs were higher than other treatments. The characteristics of Payakumbuh ducks (Anas platyrhynchos domestication) spermatozoa are milky white and yellowish white, thick and watery consistency, specific odor, volume 0.24±0.05 ml, pH 7.37±0.51, mass movement +, ++ and +++, live percentage 79.06±3.68%, concentration 2.342 billion cells/ml, motility 75.00±7.56% and abnormality 12.06±0.82%. The results of the analysis of variance showed that different AI frequencies had a significant effect (P < 0.05) on the fertility of hatching eggs, but had no significant effect (P > 0.05) on weight loss and hatchability. The frequency of IB 1 x 4 days had the highest fertility rate, namely 67.72 ± 7.99%. A simple Aspirator can function properly with the need for repairs and upgrades in several parts of the tool such as current source, and fan capacity.

Page 6 of 9 | Total Record : 84

 4   5   6   7   8 

Filter by Year

2021 2025


Reset
Filter By Issues
All Issue Vol. 23 No. 2 (2025): October Vol. 23 No. 1 (2025): April Vol. 22 No. 2 (2024): October Vol. 22 No. 1 (2024): April Vol. 21 No. 2 (2023): October Vol. 21 No. 1 (2023): April Vol. 20 No. 2 (2022): October Vol. 20 No. 1 (2022): April Vol. 19 No. 2 (2021): October Vol. 19 No. 1 (2021): April