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Ayu Putu Wiweka Krisna Dewi
Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan Dan Perikanan, Universitas Udayana
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Pengaruh Penambahan Air Cucian Beras terhadap Laju Pertumbuhan Spirulina sp. Annisa Nur Safitri Utomo; Pande Gde Sasmita Julyantoro; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 3 No 1 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Culture media is one of the important factors for microalgae growth. Adding fertilizer to culture media can influence the density of Spirulina sp. The use of rice water can be used as an alternative fertilizer for culture media because it is good for the growth of Spirulina sp. Rice water contains nutrients including nitrogen, phosphorus and vitamin B1. This study aims to determine the effect and determine the concentration of rice water media on the growth rate of Spirulina sp. culture. The experiment was conducted in December 2018 to January 2019 at Greath Hall of Brackishwater Aquaculture Fisheries (BBPBAP) Jepara, Central Java. The experiment used a completely randomized design (CRD) with five treatments and three replications. The test material in the study was Spirulina sp. with an initial density of 5×103 cells/ml and the fertilizer used is rice water and walne. The main parameters observed were Spirulina sp. cell density. while the supporting parameters observed were measurements of temperature, pH, DO, salinity, nitrate and phosphate. The dosage of adding rice washing water is treatment A1 (1 mL/L), A2 (3 mL/L), A3 (5 mL/L), K- (0 mL/L) and K + using walne fertilizer with an optimum dose of 0.5 mL/L. The results showed that the addition of rice water had a positive effect on the growth rate of Spirulina sp. The addition of rice water produces the optimum growth rate in treatment A1 which is equal to 0.57±0.001 cells/day. The ANOVA test results showed that the addition of rice water had a significant effect (P <0.05) on the growth rate of Spirulina sp.
Keterkaitan Tingkat Kesuburan Perairan Keramba Jaring Apung Dengan Fitoplankton Di Desa Terunyan, Danau Batur, Bali Ifan Martin Nopem; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 3 No 1 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This objective of this study is to determine the relationship of the level of water fertility in the waters of cage with phytoplankton in Terunyan Village, Batur lake. Data collected once a week in three months from November 2018 - January 2019. This study used descriptive methods and sampling points were determined using a purposive sampling technique based on the number of cage in the lake which consists of 3 points. Points 1 was the maximum number of cage of ± 500 pieces. Points 2 has a smaller number of cage which was ± 200 pieces. Points 3 was in location of no cage site. The abundance of phytoplankton tend to be less in the point that had more cages and overall the study obtained 14 phytoplankton genera from 4 phyla. The value of phytoplankton Abundance ranges from 4647 -7374 sel/L which is cathegorized in mesotrophic waters. The results of measurement of water quality parameters in a row with the range TSS 5.0 - 6.7 mg/L; Ammonia 0.155 - 0.177 mg/L; Nitrate 0.288 - 0.306 mg/L; Phosphate 0.207 - 0.565 mg/L; pH 7.9 - 8.0; Temperature 26 - 270C, Turbidity 3.049 – 3.410 NTU; DO 6.4 - 6.9 mg/L; Brightness 135.3 - 140.1 cm and TDS 107.5 - 130 mg/L.
Pertumbuhan Rumput Laut (Eucheuma cottoni) Menggunakan Metode Penanaman Berbeda Dengan Sistem Kantong Di Perairan Pantai Pandawa, Badung, Bali Akbar Akbar; Ni Luh Watiniasih; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 3 No 2 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study aims to determine the level of effectiveness and efficiency of seaweed growth grown in bags with different methods. This research was conducted in the village of Kutuh in the waters of Pandawa Beach in December 2019 to January 2020, by taking data once a week for 6 weeks. This research is experimental using Completely Randomized Design (CRD) which consists of two different treatments namely A (Apart in a bag) and B (Bound in a bag). The results showed that the growth pattern of seaweed in treatments A and B was almost the same. Treatment A added weight of seaweed in the 6th week reached 638,444 grams and treatment B reached 637,333 grams. Specific Growth (SGR) Treatment A was 4,409% while treatment B was 4,413%. The results of interview of 10 respondents who were interviewed 70% of farmers prefer to remain a seaweed cultivator and another 30% choose to switch professions as a provider of tourism services. Of the 70% percentage can be said that 100% of farmers prefer Treatment A as a method that can be applied. The measurement of water quality during the study were temperature range between 28,5 - 33 0C, depth ranged from 0,47 – 1,5 m, pH ranged from 7-7.7, salinity ranged from 26,3 - 34 ppt, DO ranged from 5,1 – 7,9 mg / l, nitral ranged between 1,87 – 2,04 mg / l, phosphate ranges from 0,25 – 0,33 mg / l. The value of water quality is still in the optimal range for seaweed growth.
Kelimpahan dan Similaritas Gastropoda di Perairan Melasti dan Segara Samuh, Badung, Bali Gusti Ayu Manik Pradnyani; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.531 KB) | DOI: 10.24843/CTAS.2018.v01.i01.p05

Abstract

Melasti and Segara Samuh beach are located in Badung Regency. Melasti beach (station 1) has a water activity only used for swimming. Meanwhile, Segara Samuh beach (station 2) has been utilized for tourism, such as water sport, and fishing. The development of tourism in both stations is feared to affect the abundance of living biota existence in it. This study aims to identify the difference morphological characteristic and the abundance of gastropods, as well as the similarity between points by type of gastropods. This research has been conducted on February-March 2018. This research also used descriptive quantitative method. It has been found that there were 33 species in two stations that have not much different morphological characteristic and there were 25 different spesies in two stations . Station 1 has value of gastropod abundance which was on 66,8 ind/m2, while station 2 was only 36 ind/m2. In general, the high relation and shells diameter have positive values with the highest R2 is 0,99. A high value of similarity was found on 6 points as the result to the abundance of Conus lividus existence at point 4 and 5 with 0,48 as the highest result of negative correlation analysis. The measurement of water quality parameter at station 1 has resulted as follow; pH 7,7–7,8, DO 5,3–5,6 mg/L, salinity 30,3–30,9 ppt, and temperature 28–28,1 0C. Meanwhile at station 2, it was resulted with pH 7,7, DO 5,3–5,4 mg/L, salinity 30–30,8 ppt, and temperature 29,6-30 0C. Water condition in two stations were still within the range of seawater quality standards for marine life.
Potensi Pengembangan Budidaya Ikan Gurame (Osphronemus gouramy) di Keramba Jaring Apung Danau Batur Kintamani, Bali Gede Pasek Sutedja; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Penelitian ini bertujuan untuk mengetahui ukuran benih ikan Gurame (O. gouramy) yang optimal untuk budidaya pada keramba jaring apung di Danau Batur yang dilihat dari laju pertumbuhan dan kelulushidupan benih ikan Gurame. Penelitian ini dilakukan di Keramba Jaring Apung yang terletak di Desa Trunyan, Bali. Pengambilan data dilakukan setiap dua minggu dalam waktu tiga bulan dari bulan November 2018 – Januari 2019. Pengukuran panjang benih ikan, berat benih ikan dan kualitas air dilakukan secara insitu. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari tiga perlakuan dan tiga kali pengulangan yaitu perlakuan A (Benih ikan ukuran 3 cm), perlakuan B (Benih ikan ukuran 4 cm), dan perlakuan C (Benih ikan ukuran 6 cm). Hasil penelitian ini mengindikasi benih ikan Gurame dapat hidup pada Keramba Jaring Apung di Danau Batur. Benih ikan Gurame perlakuan A menunjukan pertumbuhan yang paling baik dengan nilai SGR 0,80± 0,058%/hari, panjang mutlak 3,49 ± 0,22 cm/3 bulan, panjang nisbi 116,44 ±7,43%/3 bulan, dan nilai SR sebesar 72 ± 0,061%/3 bulan. Kualitas air yang didapat selama penelitian yaitu suhu dengan nilai rata-rata 26,8 ± 0,89 ºC, nilai pH rata-rata sebesar 8,3 ± 0,93, dan nilai DO rata-rata sebesar 6,3 ± 1,45 ppm.
Evaluasi Kualitas Air dan Kondisi Lingkungan pada Lokasi Budidaya Rumput Laut (Eucheuma cottonii) di Perairan Pantai Pandawa, Bali Devita Eka Saputri; Ima Yudha Perwira; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This research aimed to observe water quality and environmental conditions in the location of seaweed (Eucheuma cottonii) cultivation area in Pandawa Beach Waters. The research was conducted from December 2019 to January 2020. Water sampling was carried out at 3 different stations in the west side of Pandawa Beach Waters. Measuring temperature using a thermometer, salinity using a refractometer, water pH using a pH meter, and Dissolved Oxigen (DO) of water were measured using the Winkler method. Nitrate and phosphate in the water was measured using Salifert KIT. The result showed that water temperature was raning from 28.7 to 30oC, salinity was from 30 to 31 ppt, pH was from 7.5 to 7.66, and DO was from 5.60 to 6.03 mg/L. Analysis of nitrate showed range from 1.52 to 1.77 mg/L, while phosphate was ranging from 0.22 to 0.32 mg/L. These results showed that water quality in the location is suitable for the cultivation of seaweed.
Identification of Dominant Shark Fins Landed at The Port of Benoa, Bali Based on CO1 Gene Yuni Debora Prasicilia Sitorus; Pande Gde Sasmita Julyantoro; Ayu Putu Wiweka Krisna Dewi
Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i02.p07

Abstract

Indonesia is one of the world's most shark-catching countries. One of the fishery ports that has a by-product of sharks is the Port of Benoa. The purpose of this study was to determine the species and phylogenetic relationship of sharks from dominant fin samples landed at the Port of Benoa, Bali based on the results of morphological identification and DNA barcoding techniques. The study was conducted from January to February 2018 at the Pengawasan Sumberdaya Kelautan dan Perikanan Base (PSDKP) Benoa. This research uses exploration method with survey technique. The data used in this research is primary data of dominant shark fin samples in research location area and secondary data of location where shark caught by fisherman based on PSDKP database. The results showed that by-catch sharks from dominant fin samples at the Port of Benoa, Bali based on morphological identification and DNA barcoding technique were Prionace glauca (Blue Shark) species. The results of phylogenetic analysis of by-catch shark species from dominant fin samples landed at the Port of Benoa, Bali have close relation with Carcharhinidae family. Prionace glauca shark species have an amplified nucleotide base length of 600 pb with similarity reaching 99 values with species present in GenBank.
Effect of Different Stocking Density on the Growth of Catfish (Clarias gariepinus) in Aquaponics Budikdamber System Yopie Ryan Audy Harahap; Pande Gde Sasmita Julyantoro; Ayu Putu Wiweka Krisna Dewi
Advances in Tropical Biodiversity and Environmental Sciences Vol. 7 No. 2 (2023): June 2023: Pages 40-86
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2023.v07.i02.p01

Abstract

Budikdamber (fish farming in buckets) is an innovation from the aquaponics system that is carried out to keep catfish (C. gariepinus) and plants in the same container. In the Budikdamber system, it is important to pay attention to the high and low density of fish stocking because the rearing container used is a bucket. The purpose of this research was to determine the growth rate and survival rate of catfish at different stocking densities. This research was conducted with 3 treatments and each treatment had 3 repetitions, treatment A (40 fish/m3), treatment B (80 fish/m3), and treatment C (120 fish/m3). The observations showed that the highest specific growth rate of catfish was found in treatment A with a value of 12.74%, followed by treatment B 12.55% and treatment C 12.20%. The highest survival rate of catfish was found in treatment A, which was 90.8%, followed by treatment B at 87.9%, and treatment C at 86.7%. The highest feed conversion ratio (FCR) of catfish was found in treatment B, which was 0.475, followed by treatment A at 0.445, and the lowest FCR value was found in treatment C, which was 0.368. Water quality parameters measured during observations included dissolved oxygen (DO), temperature, acidity (pH), nitrite and nitrate, where all water quality parameters were still considered optimal for growth and survival of catfish.
Effectiveness of Automatic Feeder in Catfish Cultivation (Clarias gariepinus) with Biofloc System Alfajri Yuda Permana; Ayu Putu Wiweka Krisna Dewi; Gde Raka Angga Kartika
Advances in Tropical Biodiversity and Environmental Sciences Vol. 8 No. 1 (2024): February 2024: Pages 1-57
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2024.v08.i01.p08

Abstract

Catfish is a popular fish species in the community and is cultivated by many people. Catfish are considered superior to other freshwater fish. One system that can improve catfish quality and ability is the biofloc system. Biofloc system is considered more effective compared to other systems because it increases the productivity of cultivated fish. Unfortunately, cultivation in general is considered a traditional system that only uses manpower to do all activities such as feeding. One application of feeding technology is automated feeding machines. This research is aimed to determine the effectiveness of the automatic feeder on catfish cultivation with biofloc system. The research method was experimental and compared 2 treatments, which were A (biofloc without an automatic feeder) and B (biofloc with an automatic feeder). Fish samples used were 5-7 cm in size and reared for 44 days at the cultivation pond of Marine and Fisheries Faculty, Udayana University. The results of this research are SGR, FCR, and SR. Based on the results, treatment B had better SGR (3.37%), FCR (2.03) and SR (45%) compared to treatment A. The conclusion of this research is the usage of automatic feeder in catfish cultivation with biofloc system has better results than without the usage of automatic feeder.
Identification of Eucheuma cottonii Seaweed Destruction Organisms at Geger Beach Nusa Dua, Bali Nike Aryanta Manalu; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Advances in Tropical Biodiversity and Environmental Sciences Vol. 8 No. 1 (2024): February 2024: Pages 1-57
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2024.v08.i01.p09

Abstract

Eucheuma cottonii seaweed cultivation in general has a problem that is the attack of disruptive organisms in the form of pests that can cause damage to seaweed plants. This study aims to find out the type, behavior and abundance of seaweed destruction organisms on Eucheuma cottonii. Observations were made at 3 points of stakes in the coastal waters of Geger Nusa Dua, Bali. Data collection was conducted through direct observation at the research site using the Underwater Visual Census (UVC) method. The results of the data collection found 19 families of organisms that were self-exposedfrom 17 families of disruptive organisms and 2 families of non-disruptive organisms from 3 points of observation. The disruptive organisms found were: Siganidae, Holothuridae, Pinguipedidae, Labridae, Blenniidae, Paralepididae, Trichiuridae, Palmariaceae, Ulvaceae, Siphonocladaceae, Cladophorales, Caulerpaceae, Halimedaceae, Gelidiaceae, Hypneaceae, Hydrocharitaceae and Corallinaceae. While non-disruptive organisms found were Engraulidae and Scorpaenidae. Disruptive organisms have individual living behaviors (solitary) and swimming habits of disruptive organisms that swim above and crevices of seaweed Eucheuma cottonii. Treatment of disruptive organisms that feed on talus and attach / epiphytes on the surface of seaweed talus Eucheuma cottonii. The conclusion is individual abundance in stake II had an abundance of disruptive organisms with the highest result of 3.88 ind/m2, while in stake I obtained the lowest abundance calculation of 2.34 ind/m2,and in stake III which was 2.62 ind/m2.
Co-Authors Akbar Akbar Alfajri Yuda Permana Annisa Nur Safitri Utomo Arliza Cynthia Razali Devita Eka Saputri Dewa Adi Putra Dewa Ayu Angga Pebriani Endang Wulandari Suryaningtyas Gde Raka Angga Kartika Gede Pasek Sutedja Gusti Ayu Manik Pradnyani Hamdan Hamdan I Putu Eka Mahendra I Wayan Arthana I Wayan Arthana Ifan Martin Nopem Ima Yudha Perwira Juan Aldo Jaya Pradipta Sitepu Lisa Rosalia Prayuda Made Tri Loka Ni Desak Putu Dita Herlinawati Ni Desak Putu Ida Suryani Ni Luh Watiniasih Ni Made Ernawati, Ni Made Ni Pande Putu Suji Dian Antari Ni Putu Putri Wijayanti Ni Putu Sintha Maharani Nike Aryanta Manalu Nyoman Dati Pertami Octria Vesensia Pande Gde Sasmita Julyantoro Putri Febrine Nainggolan Putu Tegar Wiguna Putra Rani Ekawaty Resti Ayu NengTias Suprabadevi Ayumayasari Saraswati Yesi Breanita Yopie Ryan Audy Harahap Yuli Krisnawati Yuni Debora Prasicilia Sitorus