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Irwan Ramadhan Ritonga
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ritonga_irwan@fpik.unmul.ac.id
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tropicalaquaticsciences@unmul.ac.id
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Sekretariat Jurnal Tropical Aquatic Sciences Gedung Fakultas Perikanan dan Ilmu Kelautan Univeritas Mulawarman Kampus Gunung Kelua, Jl. Gn. Tabur No. 1 Lt. 2 Samarinda Telpon/Fax. (0541) 749482, 748372
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Kota samarinda,
Kalimantan timur
INDONESIA
TAS
Published by Universitas Mulawarman
ISSN : -     EISSN : 29876753     DOI : https://doi.org/10.30872/
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Energy Physics
Journal Tropical Aquatic Sciences (TAS) is a journal published by the Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University which was published in April 2022 with a total of 15 scientific articles published. Scientific articles published are the results of research on the scope of the latest comprehensive interdisciplinary approach to the subject of aquatic ecology, aquatic biology, hydrology, water quality, riverine and marine pollution, and oceanography. The publication of these 15 scientific articles has gone through a standard peer review process and is in accordance with the applicable code of ethics. Please refer to and cite every scientific article in the TAS that is in accordance with your research topic.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 75 Documents
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KARAKTERISTIK PERIFITON PADA DAUN LAMUN MUDA DAN DAUN TUA Enhalus acoroides DI PERAIRAN PULAU KEDINDINGAN KOTA BONTANG KALIMANTAN TIMUR Diana Nopita Sari; Aditya Irawan; Lily Inderia Sari
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.638

Abstract

Seagrass sampling in this study was carried out using purposive sampling method at 4 research stations. The results of this study were found in 37 species of old seagrass leaves consisting of 9 classes, namely Bacillariophyceae, Mediophyceae, Coscinodiscophyceae, Euglenoidea, Cyanophyceae, Dinophyceae, Chorophyceae, Chrysophyta and Xexanauplia. While in young seagrass leaves there are 33 species consisting of 8 classes, namely Bacillariophyceae, Mediophyceae, Coscinodiscophyceae, Euglenoidea, Cyanophceae, Chrysophyta, Dinophyceae and Hexanauplia. The highest periphyton composition in old and young leaves was in the Bacillariophyceae class with a percentage of 67% on young leaves and 70.9% on old leaves. The diversity index value obtained showed moderate distribution criteria because the number of periphyton individuals found in old and young leaves was relatively the same.
KARAKTERISTIK DISTRIBUSI ZAT HARA NITRAT DAN FOSFAT PADA AIR DAN SEDIMEN DI ESTUARIA TANJUNG LIMAU KOTA BONTANG KALIMANTAN TIMUR Dimas Andika Arnando; Aditya Irawan; Lily Inderia Sari
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.639

Abstract

This research was conducted in May 2021 - January 2022. The purpose of this study was to determine the distribution of nitrate and phosphate content in water and sediment in the Tanjung Limau estuary, Bontang City, East Kalimantan. Sampling of water and sediment was carried out at 4 research stations using a random method which was then analyzed at the Water Quality Laboratory and Soil Science Laboratory of PPLH Mulawarman University. The results showed that the nitrate content in the water was 0.012-0.018mg/L, 4.20-9.09% in the sediment, while the phosphate in the water was 0.014-0.077 mg/L and the phosphate in the sediment was 0.021-0.030%. The results of the analysis show that the nitrate and phosphate content is higher at Station 1 and lower towards Station 4. There is a significant difference between the nitrate and phosphate content in the water and in the sediment. The content of nitrate and phosphate is mostly sourced from upstream of the river, namely in residential areas and mangrove forests.
STUDI MORFOMETRIK UDANG BERAS MERAH (Metapenaeopsis palmensis) YANG TERTANGKAP PADA MALAM HARI DI PERAIRAN SAMBOJA KABUPATEN KUTAI KARTANEGARA Firma Dhani; Muhammad R. Syahrir; Abdunnur Abdunnur
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.640

Abstract

Southern Velvet Shrimp (Metapenaeopsis palmensis) of the Penaeidae family, morphometric measurements were carried out to see things that affect the shape of the species. This study was aimed to provide information about the morphometric study of red rice shrimp (Metapenaeopsis palmensis) caught at night in Samboja waters, Kutai Kartanegara. This research was conducted in October-November 2021, the sample used was 300 brown rice shrimp (Metapenaeopsis palmensis). The morphometric study used covariance analysis to look at 20 morphometric covariates that affect the total length (PTO). Based on the results of univariate anova test analysis, it is known that 20 morphometrics have a sig <0.05, which means that H1 is accepted, which means it has an effect on PTO. Furthermore, ancova analysis was carried out, 13 morphometric results were obtained which had sig <0.05 for PTO, namely rostrum length (RST), head length (PK), first segment length (PRP), second segment length (PRD), third segment length ( PRT), fourth segment length (PRE), fifth segment length (PRL), sixth segment length (PRN), headless length (PTK), telson length (TLN), carapace button length (PKB), third lower segment length (PTB) ), and the length of the fifth lower segment (PLB).
PERBANDINGAN HASIL TANGKAPAN UTAMA DAN SAMPINGAN ALAT TANGKAP TRAWL PADA MALAM HARI DI PERAIRAN SAMBOJA KUALA KABUPATEN KUTAI KARTANEGARA Ahmad Fauzi; Muhammad R. Syahrir; Nurfadilah Nurfadilah
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.641

Abstract

As an area bordering the Makassar Strait, Samboja Kuala District, most of the people make a living as fishermen. The fishing gear used by fishermen to catch shrimp and fish is a trawl. This study aims to identify the types of catches, determine the comparison of the percentage of main and by-catch at night. The method used in this study is a survey method, namely by going directly to the field. The main catches were 8 species of shrimp, namely Penaeus monodon, Penaeus sp, Penaeus merguiensis, Metapenaus affinis, Metapenaus monoceros, Metapenaeopsis palmenis, Metapenaeopsis barbata and Solenocera crassicornis. While the by-catch there are species of fish, cuttlefish and squid. The percentage of the main catch that was dominantly caught was Metapenaus affinis at 61% and the smallest was Penaeus sp 0%. While the percentage of by-catch is the most dominant fish beloso 33% and the smallest is grouper and bigeye fish 1% with a significance value <0.05 (sig. 0.24). The results of this study can show that there are differences in the main catch and by-catch in trawl fishing gear at night.
STRUKTUR KOMUNITAS BINTANG LAUT PADA EKOSISTEM TERUMBU KARANG DI PERAIRAN TIHI-TIHI KOTA BONTANG Ana Yumi; Dewi Embong Bulan; Irma Suryana
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.644

Abstract

Star fish has been interested to study over the seas of east Kalimantan. This study was conducted in April to May 2019 in the coral reefs ecosystem at the waters of Tihi-Tihi Bontang. This study was aimed to determine the types of starfish, diversity index, uniformity index and dominance index. The stations were consisted in three location by using transect direct survey in line of 70 m which range of width to 10 m in area of coral reefs, it was collected picture of starfish detail in natural life and continued to identify in land without take out the object from habitat. Data was analyzed using index from Odum. The result was showed two types of species confirmed in each station. In general, the diversity index was concluded in low range, the uniformity index in range of 0.40 to 0,75 and dominance of Protoreaster nodosus was confirmed at station 3, which 14 times then Linckia laevigatathe.
STRUKTUR KOMUNITAS IKAN DI PERAIRAN DANAU MELINTANG KECAMATAN MUARA WIS KABUPATEN KUTAI KARTANEGARA Amelia Putri Hendrayani; Moh. Mustakim Mustakim; Paulus Taru
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.645

Abstract

Melintang Lake (Kenohan) is a lake located in the Mahakam river area in Kutai Kartanegara Regency, East Kalimantan. This lake has an area of approximately 11,000 hectares. This study aims to determine the type of fish, to determine the total number of fish per station, and to determine the diversity, uniformity, and dominance in Melintang Lake. There were 10 types of fish found. Rempang fish (Osteochilus repang) was the most common fish with 66 individuals. The highest composition was found at station 2. Diversity index at 3 stations ranged from 1.95-2.23. Uniformity ranged from 0.85-0.97 fish were evenly distributed. Dominance ranged from 0.11-0.18 which means that no dominant species was found
ASPEK BIOLOGI KEONG MACAN (Babylonia spirata, L) YANG TERTANGKAP DI SEKITAR PERAIRAN MUARA SEMBILANG, KECAMATAN SAMBOJA, KABUPATEN KUTAI KARTANEGARA, KALIMANTAN TIMUR Fitria Melani; Mohammad Mustakim; Akhmad Rafi’i
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.646

Abstract

Around Muara Sembilang Waters, the babylon snail population is decreasing. Efforts to manage is an alternative that can be taken in meeting local and export needs by knowing various biological aspects of which includes the relationship length and weight, condition factors, sex ratio, level of gonadal maturity (TKG), gonadal maturity index (GIC), and the ratio of the weight of the meat divided by the total weight by the IKG value. This research was conducted in October – December 2021 using jodang fishing gear. The research method used is purposive sampling. Based on the T test on all samples, the calculated T value (0.71) is smaller than T table (1.969), this indicates that the b value is significantly different from 3 where the growth of the babylon snail is negative allometric which means the length increase is faster than the increase in weight. The sex ratio of babylon snails is not balanced and is dominated by female snails. The TKG and IKG values ​​of the dominant female babylon snails were higher than the male snail. Babylon snails experienced two cycles of gonadal maturity, the first occurred in the 39.11 - 39.51 mm size group with an IKG value of 12.32% and in the 43.31 - 43.71 size group with an IKG value of 11.76%. Allegedly in this size group is the condition of the parent who is ready to experience spawning.
KARAKTERISTIK BEBERAPA PARAMETER KUALITAS AIR (FISIKA-KIMIA) DI PERAIRAN PANGEMPANG KECAMATAN MUARA BADAK KUTAI KARTANEGARA Muhammad Irfan; Jailani Jailani; Widya Kusumaningrum
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.647

Abstract

To find out the characteristics of sea water quality in tidal and low conditions with parameters including DO, Salinity, pH, Temperature, Turbidity, Brightness. The study was conducted from February to April 2019. The collection of water quality parameters in pangempang waters using tools contained in the laboratory at 5 station points. Results from the parameters DO, Salinity, pH, Temperature and Brightness at the research site, while for Brightness in the Laboratory of Water Quality Faculty of Fisheries and Marine Sciences. The average result of the measurement at the tide conditions on the DO parameter is obtained 5.76 mg / l, the Salinity parameter obtained 21.8 o/oo, the pH parameter obtained 6.4, the temperature parameter obtained 32.2 oC, the turbidity parameter obtained 0.27 NTU parameter Brightness obtained 2.6 meters, while the average result of the measurement at receding conditions at the DO parameter obtained 6.56 mg / l, salinity parameter obtained 23.2 o/oo parameter pH obtained 7, Temperature parameter obtained 31.8oC turbidity parameter obtained 1.6 NTU parameter Brightness obtained 1.33 Meters.
DETEKSI TUMPAHAN MINYAK DI TELUK BALIKPAPAN TAHUN 2018 MENGGUNAKAN CITRA SENTINEL 1A Mohammad Tri Arwadi; Iwan Suyatna; Widya Kusumaningrum
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.648

Abstract

Indonesia has strategic shipping lanes and abundant natural resources, one of them is petroleum. These conditions is an advantage for Indonesia, but also it give challenges for the around ecosystem. In March 2018 there was oil spill accident in Balikpapan Bay. This incident brought bad impact for ecosystem around and people too. Based on these the research set out to monitoring the direction of distribution oil spill, the method can use remote sensing technology to search it with Sentinel 1A imagery. The image analysis used thresholding digital number. The results obtained the direction oil spill is spread out to east direction in area about ±82.579 km2 (01 April 2018). While on 13 April 2018 the oil spill there was still covering area about ±​​26,896 km2.
ANALISIS KANDUNGAN LOGAM BERAT (Pb, Cd, DAN Cu) PADA LAMUN (Enhalus acoroides DAN Thalassia Hemprichii) SEBAGAI BIOINDIKATOR PENCEMARAN DI TELUK BALIKPAPAN, KOTA BALIKAPAPAN, KALIMANTAN TIMUR Mahesa Islamy Eka Juniar; Jailani Jailani; Ghitarina Ghitarina
Tropical Aquatic Sciences Vol. 1 No. 2 (2022): Tropical Aquatic Sciences
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/tas.v1i2.649

Abstract

There are many activities in and around Balikpapan Bay which is expected to provide input of organic matter and waste containing heavy metals that may accumulate in seagrass. Seagrass is a material that can be used for analysis of heavy metal content and can accumulate these contaminants. This study aimed to analyze the levels of heavy metals (Pb, Cd, and Cu) in seagrass (Enhalus acoroides and Thalassia hemprichii) in the waters of Balikpapan Bay. Seagrass samples were taken at two stations with three repetitions. The samples were then dry-destructed prior to heavy metal analysis. Analyses The results showed that the heavy metal content of Pb was higher at Station 2 (dominated by Thalassia hemprichii) in the stem, Cd was higher at Station 1 (dominated by Enhalus acoroides) in the stem, and Cu was found higher on the leaf. Of the Seagrass at Station 2. The levels of Pb in the seagrass have exceeded the quality standard stipulated in KEPMEN No. 51 of 2004.

Page 3 of 8 | Total Record : 75

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