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Total Bakteri dan Kelimpahan Vibrio pada Budidaya Udang Vannamei (Litopenaeus vannamei) Sistem Resirkulasi Tertutup dengan Padat Tebar Berbeda Bagus Anjasmara; Pande Gde Sasmita Julyantoro; Endang Wulandari Suryaningtyas
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Microbial management is one of the succesful keys on shrimp farming with high density and environtmental friendly culture system. This study was aimed at inversigation on abudance of total bacteria and Vibrio in vannamei shrimp culture using closed recircultion system with different stocking densities. This study used an experimental method with complete randomized design factorial and was performed with closed recirculation system equipped by bio-filters, protein skimmer, and using artificial feed with addition of probiotic. 9 ponds were used for this experiment including 3 control ponds (K) with 200 ind/m2 stocking density, 3 ponds I (P1) and 3 ponds II (P2) with 500 ind/m2 and 750 ind/m2 stocking density, respectively. Those 3 pond with similar stocking density represented as three times of repetition. After 60 days culture period, the average total bacteria and abundance of Vibrio collected from culture water of K, P1, and P2 ponds were 1,2 x 104, 1,6 x 105, and 2,1 x 104 CFU/mL and 1,2 x 103, 2,8 x 103, and 3,7 x 102 CFU/mL. Moreover, at he end of experiment, the average total bacteria and abundance of Vibrio collected from Shrimph body of K, P1, and P2 ponds were 2,7 x 106, 1,6 x 106, and 4,9 x 104 CFU/mL and 2,0 x 103, 1,4 x 103, and 8,5 x 102 CFU/mL. The statistical test of ANOVA was not significant (p> 0,05) between ponds.

Struktur Komunitas Ikan Di Muara Sungai Badung Kawasan Mangrove Taman Hutan Raya (Tahura) Ngurah Rai, Bali I Gusti Agung Bagus Putra Adiguna; I Wayan Restu; Rani Ekawaty
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Muara Sungai Badung merupakan habitat dari berbagai macam kehidupan akuatik terutama ikan, dimana kondisi kualitas air sangat berpengaruh terhadap pola persebaran, keanekaragaman, kelimpahan serta kerapatannya. Ekosistem perairan muara Sungai Badung di kawasan mangrove Taman Hutan Raya (TAHURA) Ngurah Rai, Bali banyak mendapatkan tekananan ekologis dari berbagai aktivitas manusia seperti limbah – limbah yang diduga berdampak penting pada komunitas ikan (sumberdaya perikanan). Tujuan dilakukannya penelitian ini untuk mengetahui struktur komunitas dan kondisi lingkungan perairan di muara Sungai Badung. Penelitian dilakukan pada bulan Februari – Maret 2018 dengan 3 kali pengulangan pada 6 stasiun. Pengambilan sampel ikan menggunakan alat tangkap berupa jaring (gill net) dengan mesh size 1 inchi dan jala lempar. Diperoleh ikan di muara Sungai Badung yang terdiri dari 7 ordo, 14 famili, dan 14 spesies. Stasiun III mempunyai kelimpahan ikan tertinggi diantara stasiun lainnya yaitu 0,142 ind/m2 dengan komposisi ikan terbanyak diantara stasiun lainnya yaitu sebanyak 8 spesies, kelimpahan ikan terendah terdapat pada stasiun II yaitu 0,055 ind/m2 dengan komposisi ikan sebanyak 4 spesies. Komposisi ikan keseluruhan tertinggi yang didapatkan di muara Sungai Badung yaitu Mystus gulio sebanyak 18,56% dengan kelimpahan tertinggi sebesar 0,082 ind/m2, sedangkan ikan dengan komposisi keseluruhan yang rendah yaitu Pomadasys argenteus 1,14% dengan kelimpahan terendah sebesar 0,005 ind/m2 pada stasiun VI. Indeks keanekaragaman tertinggi terdapat pada stasiun III yaitu 1,96 dan yang terendah terdapat pada stasiun I sebesar 0,93. Indeks keseragaman tertinggi terdapat pada stasiun III sebesar 0,74 dan yang terendah terdapat di stasiun I sebesar 0,35. Indeks dominansi tertinggi terdapat pada stasiun I sebesar 0,40 dan yang terendah terdapat di stasiun III dengan nilai 0,16. Kata Kunci: Ikan; Muara; Struktur Komunitas; Sungai Badung; Mangrove

Keanekaragaman Jenis dan Sebaran Ikan di Danau Buyan Bali I Gusti Agung Dwikhy Oka Taradhipa; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Buyan lake is one of the lake in bali, located in pancasari village, sukasada, buleleng. Lack of research on the identification and distribution of fish species in buyan lake. Therefore, it is necessary to conduct research on the identification and distribution of fish species in the buyan lake. This research is take place in pancasari village, sukasada, buleleng. This research is conducted from january to march 2018. Sampling is done 3 times in 3 month. Location determination by using purposive sampling with 4 stations. The fish catch is done by using the gill net with the size 1cm, 5cm and 6,5cm and bubu. The type of fish in this research is 7 type with the total of the catch is 1024 fish. The fish that get biggest share is nyalian srembeng fish that can meet in every research station smallest share is ikan mas that can meet only in station 1, 2 and 3. The variant of fish that located in buyan lake is one of the mid category. uniformity fall into the low category and domination fish include low category.

Kandungan Logam Berat Timbal (Pb) dan Kadmium (Cd) Pada Badan Air dan Ikan di Perairan Teluk Benoa, Bali Ni Putu Suci Mardani; I Wayan Restu; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Heavy metals going into the aquatic environment will have an impact on the quality of the aquatic environment and affect the life of the biota in it. This study objectives is to determine the content of heavy metals Pb and Cd in water as well as in the Mullet Fish (Mugil cephalus) and Orange Spotted Rabbit Fish (Siganus guttatus) caught in Benoa Bay. The study was conducted from February to April 2018. The results showed that the content of heavy metals Pb and Cd in the water in Benoa Bay had exceeded the quality standards of metals dissolved in water for marine biota listed on Pergub Bali No. 16 of 2016. The value of Pb heavy metals in Mullet Fish and Orange Spotted Rabbit Fish in some samples have exceeded the maximum limit of heavy metal contamination SNI 7387: 2009. Cd heavy metal in Mullet Fish and Orange Spotted Rabbit Fish have exceeded the maximum limit of Cd metal contamination in fish and the processed product of 0.1 mg / Kg. Bioconcentration factor of metal Pb in Mullet Fish is included in the category of low accumulative properties of Pb heavy metals. BCF value of metal Cd in Mullet Fish shows that Mullet Fish has moderate accumulative properties against heavy metal Cd. Orange Spotted Rabbit Fish belongs to low category of accumulative properties against heavy metals Pb and Cd.

Identifikasi dan Predileksi Ektoparasit Kepiting Bakau (Scylla spp.) dari Ekosistem Mangrove Taman Hutan Raya (TAHURA) Ngurah Rai, Bali Ilham Muttaqin; Pande Gde Sasmita Julyantoro; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

This research aims to know the various types, predilections, prevalence and intensity of ectoparasites on mud crab (Scylla spp.) and water quality condition in Taman Hutan Raya (TAHURA) Ngurah Rai, Bali. This research was conducted in TAHURA mangrove ecosystem which has 219 hectare of research area near to Pemogan village from February to April 2018. The research used descriptive method by using random sampling for collecting data. Mud crabs obtained in this research consisted of 21 individual mud crabs that belong to 3 species, namely Scylla olivacea (11 ind), Scylla serrata (9 ind), and Scylla tranquebarica (1 ind). The observations results found 5 types of ectoparasites namely Zoothamnium sp. (2021 ind), Epistylis sp. (955 ind), Carchesium sp. (7 ind), Vorticella sp. (98 ind), and Octolasmis sp. (201 ind). Organs infected by ectoparasitic are legs (517 ind), swimming legs (476 ind), carapace (740 ind), claws (1348 ind), and gills (201 ind). The highest prevalence rate obtained was Zoothamnium sp. and Epistylis sp. about 95,23% while the lowest prevalence rate was Carchesium sp. about 4,76%. The highest level of intensity was Zoothamnium sp. about 101,05 ind/crab, while the lowest intensity obtained on Carchesium sp. with 7 ind/crab. The condition of water quality was still considered optimal for mud crab (Scylla spp.) life with average temperature of 29,9 ºC, dissolved oxygen 6,6 mg/L, salinity 20‰, and pH 7,39.

Identifikasi Bakteri Patogen Pada Ikan Nila (Oreochromis niloticus) di Danau Batur, Bali Ni Putu Wiwin Angreni; I Wayan Arthana; Endang Wulandari Suryaningtyas
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

This research aims to determine types of pathogen bacteria presented in body parts (liver and kidneys) of Tilapia (Oreochromis nilotics), types of bacteria attacks wild Tilapia and fish in Floating Culture Net (FCN) of Batur Lake as well as its prevalence bacteria found in Tilapia on Batur lake. Method used in this research is descriptive method, with a sampling method based on purposive sampling technique. According to identification’s result obtained, types of bacteria that infect liver were including to Aeromonas hydrophila, Plesiomonas shigelloides and Citrobacter freundii bacteria. Meanwhile, bacteria that infect kidneys are Aeromonas hydrophila, Aeromonas caviae, Plesiomonas shigelloides and Citrobacter freundii. Bacteria that infect wild fish are Aeromonas hydrophila, Aeromonas caviae and Plesiomonas shigelloides , while fishes in FCN are infected by Aeromonas hydrophila, Aeromonas caviae, Plesiomonas shigelloides and Citrobacter freundii bacteria. Infection prevalence of pathogen bacteria in Tilapia in Batur Lake is Aeromonas hydrophila at 55,5%, Plesiomonas shigelloides for 27,7%, Aeromonas caviae and Citrobacter freundii at 11,1%. According to sampling location, prevalence of bacteria that attacks wild fish are Aeromonas hydrophila and Plesiomonas shigelloides at 44,4%, Aeromonas caviae for 11,1%. Prevalence of bacteria that attacks fish in FCN is Aeromonas hydrophila for 66,6%, Citrobacter freundii infection at 22,2%, Aeromonas caviae and Citrobacter freundii at 11,1%.

Produktivitas Primer Fitoplankton pada Daerah Penangkapan Ikan di Taman Wisata Alam Danau Buyan, Buleleng, Bali Ni Kadek Suardiani; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

This research aims to identify productivity value of phytoplankton’s net primary as well as its relation within parameter of physics, chemistry, and aquatic biology to the productivity value of phytoplankton’s net primary in the waters of Lake Buyan Nature Park. Measurement of primary phytoplankton productivity is conducted by using bright and dark bottle method. The taking of lake water samples for measurement of phytoplankton primary productivity and measurement of supporting parameters namely physics (temperature, brightness, turbidity), chemistry (pH, nitrate, phosphate) and biology (phytoplankton abundance) were carried out at four research stations in the fishing area. Data analysis used in this research is correlation analysis among parameters of physic, chemistry, and aquatic biology to the net primary productivity value of phytoplankton by using the PAST 3.1 application. The obtained result showed that the value of net primary productivity ranged from 76.39 to 211.46 mgC / m3 / day and the parameters of physics, chemistry and aquatic biology have a relationship with net primary productivity of phytoplankton. Brightness, abundance of phytoplankton, nitrate, temperature, dissolved oxygen, pH and phosphate which are positively correlated with net primary productivity of phytoplankton while water turbidity is negatively correlated with it. Parameters that have a strong to very strong relationship with net primary productivity are dissolved oxygen, temperature, nitrate, phytoplankton abundance, and water brightness.

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

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.

Struktur Komunitas Moluska di Perairan Pantai Grand Bali Beach Sanur, Bali I Bagus Andreana Surya Nugraha; Pande Gde Sasmita Julyantoro; Suprabadevi Ayumayasari Saraswati
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

The purpose of this research was to investigate the community structure of mollusks, water quality and substrate type at Grand Bali Beach, Sanur. The research location was divided into 4 stations. This research was held in January until February 2018. The data was obtained from transect 1x1 m. The research was analysis by descriptive quantitative method. The research found about 33 species. The total abudance from station 1, 2, 3 and 4 were 5,75 ind/m2, 6 ind/m2, 6 ind/m2 and 9 ind/m2 respectively. The value of diversity was 2-2,52, indicated a moderate diversity while the evenness was 0,8-0,9, that indicated the high evenness and the dominance was low about 0,11-0,19. The community structure of mollusk at the Grand Bali Beach Sanur was still in normal condition for mollusk that supported by good water quality and favorable substrate type.

Keanekaragaman dan Kelimpahan Makroinvertebrata Sebagai Biomonitoring Kualitas Perairan Tukad Badung, Bali Endang Rustiasih; I Wayan Arthana; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Sungai Badung merupakan salah satu sungai utama di Bali yang mengalir di tengah-tengah Kota Denpasar. Berbagai limbah yang dihasilkan dari aktivitas masyarakat yang dibuang secara langsung ke sungai tanpa adanya pengelolaan dapat menyebabkan penurunan kualitas air sungai dan tentunya berdampak bagi organisme yang menghuni perairan sungai tersebut. Salah satu organisme yang hidup di perairan sungai dan dapat dijadikan sebagai bioindikator kualitas perairan sungai, yaitu makroinvertebrata. Penelitian ini bertujuan untuk mengetahui keanekaragaman dan kelimpahan jenis makroinvertebrata, mengetahui kondisi perairan dilihat dari parameter fisik dan kimia perairan, serta mengetahui kondisi kualitas perairan menggunakan indikator biologis makroinvertebrata dengan metode famili biotik indeks (FBI) di perairan Sungai Badung. Metode yang digunakan dalam penelitian adalah metode deskriptif kuantitatif. Hasil indeks keanekaragaman (H’) dari ketiga stasiun pengamatan di perairan Sungai Badung berkisar antara 2,39-2,59 dan termasuk dalam kategori keanekaragaman sedang. Kelimpahan makroinvertebrata tertinggi pada stasiun I (hulu) dan II (tengah) adalah spesies Tarebia granifera, yakni masing-masing sebesar 47,22 ind/m2 dan 450,93 ind/m2; sedangkan kelimpahan tertinggi pada stasiun III (hilir) adalah spesies Elimia potosiensis sebesar 340,74 ind/m2. Hasil pengukuran parameter kualitas air didapatkan suhu 26,8-28,6?C; pH 8,29-8,61; DO (Dissolved oxygen) 6,42-8,15 mg/L; BOD5 2,35-5,32 mg/L; 0,32-0,56 m/s. Stasiun I memiliki tipe substrat lempung berpasir, stasiun II pasir berlempung, dan stasiun III berpasir. Kondisi kualitas perairan Sungai Badung berdasarkan perhitungan FBI pada stasiun I sebesar 5,06, stasiun II sebesar 6,64 dan stasiun III sebesar 6,98.

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Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota denpasar,

Bali

INDONESIA