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Current Trends in Aquatic Science
Published by Universitas Udayana
ISSN : 26217368     EISSN : 26217473     DOI : -
Core Subject : Education,
Other
Arjuna Subject : -
Articles 16 Documents
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Search results for , issue "Vol 3 No 1 (2020)" : 16 Documents clear
Prevalensi dan Intensitas Parasit pada Ikan Layur (Trichiurus lepturus) di Pasar Ikan Kedonganan, Bali Hasbia Rahmat; Pande Gde Sasmita Julyantoro; Endang Wulandari Suryaningtyas
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 study aims to determine the prevalence and intensity of parasitic infections in layur fish (T. lepturus) sold in Kedonganan Fish Market. Layur fish (T. lepturus) were studied as many as 40 birds and identified in the Fisheries Science Laboratory, Faculty of Marine and Fisheries, Udayana University. Parasites observed were ectoparasites and endoparasites. The results of the research data were analyzed by calculating the difference in prevalence, intensity of infection, and correlation test to determine the relationship between length and intensity, weight with intensity, and descriptive calculation to determine the level of infection in various organs. The results showed that the prevalence of parasitic infections in layur fish (T. lepturus) marketed in the Kedonganan Fish Market was included in the ‘always’ category with a value of 95%. According to William and Bunkley (1996), this ‘always’ category illustrates that ordinary parasites infect fish by 90-98%. The intensity of parasitic infections was 815 parasitic individuals with an average intensity of 21.44 parasites / fish. After a correlation test, the relationship between the length and weight of the fish with the intensity of parasitic infection was positively correlated but with a weak relationship with values ??of 0.029 and 0.146, where each fish increased in length and weight, it did not necessarily increase the intensity of parasitic infections.
Profil Histologi Hepatopankreas Udang Vanamei (Litopenaeus vanamei) Dikultur dengan Padat Tebar Berbeda M Reza Mei Budi Dharmawan; Pande Gde Sasmita Julyantoro; Alfi Hermawati Waskita Sari
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

Teknologi akuakultur resirkulasi adalah sebuah sistem sirkulasi air dengan menggunakan kembali air untuk budidaya, sehingga mengurangi penggunaan air dari luar sistem. Menggunakan teknologi akuakultur resirkulasi ini, biota budidaya akan lebih sehat dan kadar sirkulasi makanan lebih rendah dari perikanan secara konvensional. Tujuan penelitian ini untuk mengetahui gambaran kondisi hepatopankreas udang hasil teknologi budidaya Recirculating Aquaculture System (RAS) dengan padat tebar yang berbeda. Penelitian ini menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL) dengan 3 perlakuan dan 3 kali ulangan, yaitu RAS padat tebar 500 ekor/m2, RAS padat tebar 750 ekor/m2, dan kontrol berupa budidaya sistem intensif flow through (konvensional) padat tebar 200 ekor/m2. Prosedur pembuatan sampel histologi hepatopankreas udang vanamei dilakukan berdasarkan prosedur Austin dan Austin (1989). Hasil penelitian menunjukkan perubahan struktur hepatopankreas pada udang uji berupa nekrosis, vakuolasi, dan indikasi mineralisasi. Pada teknologi budidaya RAS padat tebar 500 ekor/m2 kondisi hepatopankreas mengalami peningkatan kualitas pada bulan ke-2, karena nekrosis, vakuolasi, dan mineralisasi pada tubulus mengalami penurunan, sehingga lebih banyak tubulus utuh yang berada pada kondisi normal. Sedangkan pada teknologi budidaya RAS padat tebar 750 ekor/m2 dan kontrol kondisi hepatopankreas mengalami penurunan kualitas pada bulan ke-2. Tetapi pada teknologi budidaya RAS padat tebar 750 ekor/m2 lebih baik daripada kontrol, karena pada kontrol tidak ditemukan tubuli normal yang mengindikasikan hepatopankreas mengalami kerusakan. Kualitas air budidaya pada tambak udang uji masih dikategorikan normal dan memenuhi baku mutu untuk pemeliharaan udang vanamei.
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.
Keanekaragaman Makrozoobetos Sebagai Bioindikator Kualitas Perairan di Taman Hutan Raya Ngurah Rai, Bali Ari Isnen Sobari; Ni Luh Watiniasih; Dewa Ayu Angga Pebriani
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

Ngurah Rai Forest Park (Tahura) is one of the mangrove ecosystem areas in Bali which is an area of brackish forest type. Ngura Rai Tahura is based on administration in two city districts namely Badung and Denpasar. The Tahurah Ngurah Rai area is surrounded by housing, restaurants, hotels, malls, and shops as centers of community activities that have the potential to cause disruption to the balance of the aquatic ecosystem. The purpose of this research is to determine the diversity of macrozoobenthos and the condition of water quality in the mangrove ecosystem area in Tahura Ngurah Rai, Bali. This research uses a descriptive quantitative method that is exploratory in order to obtain facts of the conditions that exist through surveys in the field and identification in the laboratory. The sampling technique used was purposive sampling with transect quadrant measuring 1 x 1 m with teransek determination area of 5 m x 5 m. Sampling was carried out at four stations which included macrozoobenthos samples, measurement of water quality parameters (temperature, salinity, pH, DO, turbidity), and analysis of water-based substrates performed visually. Data from research conducted at three different locations in the Ngurah Rai Tahura mangrove ecosystem area found 55 species with a total abundance at station 1 6.68 ind / m2, station 2 4.52 ind / m2, station 3 3.55 ind / m2 from the class Gastropoda, Crustacea, Bivalvia, and Polychaeta.. Diversity index at the three stations is classified as moderate level with water conditions that have experienced pressure or disturbance.
Tingkat Reduksi Kromium Heksavalen (Cr6+) pada Air dengan Menggunakan Kombinasi Kultur Chlorella sp. dan Spirulina sp. Anisa Oka Dina; I Wayan Darya Kartika; Ima Yudha Perwira
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

Penelitian ini bertujuan untuk mengetahui kemampuan dari Chlorella sp. dan Spirulina sp. pada kultur kombinasi dalam mereduksi logam berat kromium heksavalen (Cr6+) dalam air. Penelitian ini dilakukan di Balai Besar Perikanan Budidaya Air Payau (BBPBAP) Jepara dari bulan Desember 2018 sampai Februari 2019. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL), yang terdiri dari tiga perlakuan dan tiga kali pengulangan yaitu perlakuan A (Chlorella sp.), perlakuan B (Spirulina sp.), dan perlakuan C (kombinasi).Berdasarkan hasil penelitian diketahui bahwa kultur kombinasi Chlorella sp.dan Spirulina sp. menunjukkan tingkat reduksi logam berat kromium heksavalen yang paling tinggi (20%) dibandingkan dengan kultur dari masing-masing secara individu (dari 6,0 ppm menjadi 4,8 ppm). Tidak ada pengaruh dari logam berat kromium heksavalen pada kepadatan fitoplankton selama proses kultur. Kualitas air yang diukur selama penelitian yaitu salinitas dengan nilai 15 ppt, nilai DO berkisar 6,9-7,3 mg/L, nilai suhu 21-22,5?C, dan nilai pH berkisar 7,4-7,9.

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