Sebaran Vertikal Total Nitrogen, Total Fosfat, Dan Amonia Pada Perairan Pesisir Yang Berdekatan Dengan Kawasan Budidaya Laut Di Bali Utara

Septory, Reagan; Nasukha, Afifah; Sudewi, Sudewi; Setiadi, Ananto; Mahardika, Ketut

doi:10.15578/jra.16.2.2021.125-134

Cited by 3 publications

(7 citation statements)

References 15 publications

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“…This research was conducted in 2019 at the center of fish marine farming in Gerokgak District, Buleleng Regency, Bali Province. Water sampling was carried out with water quality measurements from our previous study [11]. The study was divided into two sampling periods following the sea surface temperature distribution pattern previously reported by [10].…”

Section: Sampling Stations and Periodsmentioning

confidence: 99%

“…Sampling was done once a month. Sampling point and depth Map source: Bing Aerial Data source: Septory et al [11] The three selected areas are coastal waters in Gerokgak Village (Station A) and Penyabangan Village (Station B) which are hatchery areas for grouper (Epinephelus spp. ), white snapper (Lates calcarifer), and milkfish (Chanos chanos), and Pegametan Bay (Station C), Sumberkima Village which is a grow-out area for grouper and white snapper in floating net cages.…”

Section: Sampling Stations and Periodsmentioning

confidence: 99%

“…The sampling coordinate point was determined following the determination of the coordinates reported by [11] using an echosounder, and the position coordinates of each depth point were detected using a global positioning system (GPS). At the Gerokgak and Penyabangan locations, the sampling points were determined perpendicular to the shoreline at 5, 10, 20, and 30 meters (Figure 1A & B).…”

Section: Sampling Point Distributionmentioning

confidence: 99%

“…The Gerokgak District's coastal waters exhibit bacterial variations characterized by rising ammonia levels and falling water temperatures [10]. According to [11], the vertical distribution of TN, TP, and ammonia concentrations in coastal waters in the Gerokgak District is largely homogenous. This condition occurs up to a depth of 30 m with a distance of 900 m from the shoreline, which is also an outlet for fish farming activities.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Vertical distribution of bacteria populations at the finfish marine culture in North Bali Coast, Indonesia

Mahardika,

Mastuti,

Septory

et al. 2023

E3S Web Conf.

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One of the indicators of aquatic biology is the bacterial population. This study was conducted to determine the vertical distribution of bacterial populations in coastal waters at the marine fish farming in North Bali. Three locations of water samples in depths of 5, 10, 20, and 30 m samples were determined. They are shoreline near the hatcheries at Penyabangan and Gerokgak and water near the net cages at Pegametan Sumberkima. Three replications of the sample collection were done in the surface, middle, and bottom at each sampling point. Samples were collected monthly during the two seasonal transitions from April to June and August to October. The distribution of bacteria was determined by the culture-dependent method (CDM) by measuring the number of bacteria based on bacterial cultivability on agar media. The results showed a lower bacterial population (101-102 cfu/mL) was observed in August. An even distribution of total bacteria (103 cfu/mL) was seen at Pegametan Bay. Higher Vibrio spp. was found at a depth of 10 m than 20 and 30 m. While Pegametan Bay station had the highest Vibrio spp. number. Halotolerant bacteria tend to increase to 5 x 102 cfu/mL from April to June at a depth of 5.

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Section: Sampling Stations and Periodsmentioning

confidence: 99%

Section: Sampling Stations and Periodsmentioning

confidence: 99%

Section: Sampling Point Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vertical distribution of bacteria populations at the finfish marine culture in North Bali Coast, Indonesia

Mahardika,

Mastuti,

Septory

et al. 2023

E3S Web Conf.

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“…Ikan kerapu merupakan ekonomis penting dengan harga yang tinggi (Huliselan et al, 2017). Kegiatan pemeliharaan ikan menggunakan karamba jaring apung dalam menghasilkan limbah berupa nutrien seperti nitrat dan fosfat (Septory et al, 2021) sebesar 142 kg N dan 26 kg P dilepaskan ke lingkungan per ton produk ikan untuk pakan rucah dan 205,6 ton nitrat dan 72 kg N dan 17,3 kg P untuk pakan hasil formulasi (Qi et al, 2019). Nitrat dan fosfat menjadi faktor yang memepengaruhi kehidupan karang (Suryanti et al, 2018).…”

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Prevalensi Penyakit Karang di Pulau Menjangan Besar Karimunjawa

et al. 2022

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Coral disease can cause coral damage on Menjangan Besar Island, Karimunjawa. Floating net cages adjacent to coral reefs can affect coral health. Floating net cages can affect water quality by adding nutrients, such as nitrate (205.6 and phosphate 39.2/ton fish production). Nutrients and environmental factors can trigger and cause coral disease. The purpose of this study was to determine the effect of the existence of floating net cages on the prevalence of coral disease on Menjangan Besar Island, Karimunjawa. The research was conducted using a survey method, data collection using a proportional method, the results of the data will be analyzed descriptively. The results of the study found Black Band Disease, Brown Band Disease, Ulcerative White Pox, White syndrome, Yellow Bloch Disease, Pigmentation responses, White Plague and White Band Disease. Water parameters such as temperature ranged from 30.71-30.750C, salinity 32.7-33.20/00, current velocity 0.03-0.06 m/s, nitrate 0.586-1,128 mg/L and phosphate 0.064-0.133 mg/ L. The most common disease is Ulcerative White Pox. The prevalence of coral disease is influenced by the presence of floating net cages, it can be seen in A1, A2 and A3 with prevalence values (39.85, 43.61 and 33.14) which are higher than B1 and B2 (14.41 and 10,6). Penyakit karang dapat menyebabkan kerusakan karang di Pulau Menjangan Besar Karimunjawa. Karamba jaring apung yang berdampingan dengan terumbu karang dapat mempengaruhi kesehatan karang. Karamba jaring apung dapat mempengaruhi kualitas air dengan menambah nutrien, seperti Nitrat (205,6 dan fosfat 39,2/ton produksi ikan. Nutrien dan faktor lingkungan dapat menjadi pemicu dan penyebab penyakit karang. Tujuan penelitian ini untuk mengetahui pengaruh keberadaan karamba jaring apung terhadap prevelensi penyakit karang di Pulau Menjangan Besar Karimunjawa. Penelitian dilakukan dengan metode survei, pengambilan data dengan metode porposif, hasil data akan disanalisis secara deskiptif. Hasil penelitian ditemukan penyakit Black Band Disease, Brown Band Disease, Ulcerative White Pox, White syndrome, Yellow Bloch Disease, Pigmentation responses, White Plague dan White Band Disease. Parameter perairan seperti temperatur berkisar 30,71-30,750C, salinitas 32,7-33,20/00, kecepatan arus 0,03-0,06 m/s, nitrat 0,586-1,128 mg/L dan fosfat 0,064-0,133 mg/L. Penyakit paling banyak ditemukan adalah Ulcerative White Pox. Prevelensi penyakit karang dipengaruhi oleh keberadaan karamba jaring apung, dapat terlihat pada A1, A2 dan A3 dengan nilai prevalensi (39,85, 43,61 dan 33,14) yang lebih tinggi jika dibandingkan dengan B1 dan B2 (14,41 dan 10,6).

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Polyculture of sea cucumber (Holothuria scabra) and milkfish (Chanos chanos) in controlled tanks

Setiawati,

Sembiring,

Sudewi

et al. 2023

E3S Web Conf.

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Milkfish (Chanos chanos) and sea cucumbers (Holothuria scabra) are fishery commodities that can grow well in ponds. The commodities have different feeding habits. Polyculture trials in controlled tanks are possible. This study aimed to determine the growth and survival of sea cucumbers reared in polyculture in tanks and to know whether sea cucumbers can use milkfish feces as feed. This study used 12 PE tanks of 500 L to ascertain that no other food sources were available in the tanks. The initial size of sea cucumber seeds was 3.4 – 5.4 cm and milkfish 19.0 – 22.5 cm. The treatments designed were (A) monoculture of sea cucumber (28.6 g/m2), (B) polyculture of sea cucumbers (28.6 g/m2) and milkfish (0.28 g/L), (C) polyculture of sea cucumbers (28.6 g/m2) and milkfish (0.56 g/L), and (D) monoculture of milkfish (0.56 g/L). Results showed that both monoculture and polyculture of sea cucumbers and milkfish resulted in high survival rates (100%). Although the polyculture of sea cucumbers showed no significant difference in growth, polyculture with milkfish (C) tended to have a higher final weight of sea cucumbers than the other treatments. Sea cucumbers could utilize milkfish feces and increase the growth of sea cucumbers.

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Sebaran Vertikal Total Nitrogen, Total Fosfat, Dan Amonia Pada Perairan Pesisir Yang Berdekatan Dengan Kawasan Budidaya Laut Di Bali Utara

Cited by 3 publications

References 15 publications

Vertical distribution of bacteria populations at the finfish marine culture in North Bali Coast, Indonesia

Vertical distribution of bacteria populations at the finfish marine culture in North Bali Coast, Indonesia

Prevalensi Penyakit Karang di Pulau Menjangan Besar Karimunjawa

Polyculture of sea cucumber (Holothuria scabra) and milkfish (Chanos chanos) in controlled tanks

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