Pengaruh Pemberian CO2 terhadap pH Air pada Pertumbuhan  Caulerpa racemosa var. uvifera

Abstract The Effect of CO2 on Water pH to Caulerpa racemosa var. uvifera GrowthAlthough in the growing season, seaweed type Caulerpa racemosa var. uvifera sometimes has not be found in the field due to environmental factors. So seaweed mariculture is urgently needed. This research was aimed to study the impact of providing CO2 with different duration in the water media on the growth of C. racemosa var. uvifera. This research was used 5 treatments with 3 repetitions, namely: A (without CO2 as a control), B (providing CO2 for 6 hours per day), C (giving CO2 for 12 minutes per day), D (CO2 delivery, 18 minutes per day) and E (providing CO2 for 24 minutes per day). The observed data in the form of wet weight and water quality that were used as maintenance medium. The results showed that providing CO2 with different duration significantly affected (P <0.01) among treatments. The highest specific growth rate of C. racemosa var.uvifera was in the B (5.270 +0.022)% per day and the lowest in E (1.908 +0.069)% per day. The CO2 contents in treatment B ranged from 95.88 to 108.11 with a pH ranging from 7.0 to 8.4 and CO2 contents in treatment E was 382.87-412.08 with a pH ranging from 6.0 to 8.0.Keywods: Growth, CO2, pH, Caulerpa racemosa AbstrakRumput laut jenis Caulerpa racemosa var. uvifera walaupun sudah musimnya tumbuh kadang tidak ditemukan di perairan, karena kondisi lingkungan sangat mempengaruhi. Hal ini mengakibatkan produksi jenis tanaman tersebut langka, sehingga perlu dilakukan budidaya. Penelitian ini bertujuan untuk mengkaji pemberian CO2 yang berbeda terhadap pH media air pemeliharaan pada pertumbuhan C. racemosa var. uvifera. Penelitian ini menggunakan 5 perlakuan dengan 3 kali pengulangan, yaitu : A (tanpa CO2 sebagai kontrol), B (pemberian CO2 selama 6 menit per hari), C (pemberian CO2 selama 12 menit per hari), D (pemberian CO2,18 menit per hari) dan E (pemberian CO2 selama 24 menit per hari). Data yang diamati berupa berat basah dan kualitas air yang digunakan sebagai media pemeliharaan. Hasil penelitian menunjukkan bahwa pemberian CO2 dengan lama waktu yang berbeda memberikan pengaruh yang sangat nyata (p<0,01) antar perlakuan. laju pertumbuhan spesifik C. racemosa var.uvifera tertinggi pada perlakuan B (5,270+0,022) % per hari dan terendah pada perlakuan E (1,908+0,069) % per hari. CO2 yang terkandung pada perlakuan B berkisar 95,88-103,11 dengan pH berkisar 7,0-8,4 dan CO2 pada perlakuan E sebesar 382,87-412,08 dengan pH berkisar 6,0-8,0. Kata kunci : Pertumbuhan, CO2, pH, Caulerpa racemosa

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Pengaruh Penambahan Pupuk Padat dan Cair terhadap Pertumbuhan, Jumlah Klorofil dan Kadar Protein Caulerpa racemosa, J.Agardh, 1873 (Ulvophyceae : Caulerpaceae)

Journal of Marine Research ◽

10.14710/jmr.v8i3.25269 ◽

2019 ◽

Vol 8 (3) ◽

pp. 269-276

Author(s):

Vicky Dimas Pradhika ◽

Suryono Suryono ◽

Sri Sedjati

Keyword(s):

Growth Rate ◽

Protein Content ◽

Chlorophyll Content ◽

Specific Growth ◽

Fertilizer Application ◽

Average Weight ◽

Caulerpa Racemosa ◽

Daily Growth ◽

Liquid Fertilizer ◽

Wet Weight

Caulerpa racemosa merupakan salah satu jenis rumput laut hijau yang dapat hidup di daerah pasang surutmaupun daerah yang tenang/bebas dari pasang surut. Setiap tahun permintaan C. racemosa di Jepara terus meningkat. Usaha pengembangan budidaya C. racemosa perlu dilakukan supaya penyediaan kebutuhan pasar tidak bergantung pada alam. Upaya peningkatan produksi budidaya dapat dilakukan dengan penambahan nutrien di tambak budidaya. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk padat dan cair terhadap pertumbuhan (berat basah, laju pertumbuhan harian) dan kandungan klorofil serta kadar protein rumput laut C. racemosa. Perlakuan yang pada penelitian ini adalahpenambahan pupuk :A (pupuk padat), B (pupuk cair), C (pupuk padat dan cair). Pencapaian berat rata rata rumput laut sebagai berikut: Kontrol= 39,5 ± 6,36 gram; A= 11,5 ± 2,12 gram; B= 18,5 ± 10,6 gram; D= 52,6± 14,19 gram. Laju pertumbuhan spesifik C. racemosa adalah: A= 1,2 ± 0,37%; B= -1,64 ± 0,51%; C= -0,53 ± 0,89%; C= 1,7 ± 0,63%. Kandungan klorofil a C. racemosa pada minggu 6 yaitu: Kontrol= 0,022mg/gram; A=0,015 mg/gram; B= 0,017 mg/gram; C= 0,080 mg/gram. Kandungan klorofil b C. racemosa pada minggu ke 6 yaitu: A= 0,016 mg/gram; B= 0,018 mg/gram; C= 0,013 mg/gram; D=0,026. Kandungan protein sebelum pemberian perlakuan adalah 0,60 % sedangkan setelah diberiperlakuan yaitu: Kontrol= 0,70% ± 0,06; A= 0,75% ± 0,11; B= 0,60% ± 0,10; C= 0,73% ± 0,08. Hasil penelitian ini menunjukkan bahwa pemberian pupuk padat dan cair berpengaruh nyata pada berat basah dan laju pertumbuhan spesifik C. racemosa (p < 0,01) sedangkan pemberian pupuk tidak bepengaruh nyata pada kandungan klorofil dan kadar protein (p > 0,05). Caulerpa racemosa is a type of green algae that can live’s in tidal areas and calm / free from tides. Every year the demand for C. racemosa in Jepara is continues to increase. Cultivation of C. racemosa need to be done so the market suply is not dependent only on nature. Efforts to increase culture production can be done by adding nutrients to aquaculture ponds. This study aims to determine the effect of solid and liquid fertilizer on growth (wet weight, daily growth rate), chlorophyll content and protein content of C. racemosa seaweed. Treathments of this study is fertilize additon: A (solid fertilizer), B (liquid fertilizer), C (solid and liquid fertilizer). The average weight of seaweed for 42 days is as follows: Control = 39.5 ± 6.36 grams; A = 11.5 ± 2.12 grams; B = 18.5 ± 10.6 grams; C = 52.6 ± 14.19 grams. Specific growth rates of C. racemosa produced for 42 days is: Control = 1.2 ± 0.37%; A = -1.64 ± 0.51%; B = -0.53 ± 0.89%; C = 1.7 ± 0.63%. C. racemosa’s Chlorophyll a content at week 6 is: Control = 0.022 mg/gram; A = 0.015 mg/gram; B = 0.017 mg/gram; C = 0.080 mg/gram. C. racemosa’s Chlorophyll b content at week 6 is: Control = 0.016 mg/gram; A = 0.018 mg/gram; B = 0.013 mg/gram; C = 0.026 mg/gram. Protein content before administration of treatment is 0.60% while after treatment, is: Control = 0.70% ± 0.06; A = 0.75% ± 0.11; B = 0.60% ± 0.10; C = 0.73% ± 0.08. The results of this study showed, the addition of solid and liquid fertilizers had a significant effect on wet weight and specific growth rate of C. racemosa (p <0.01) while fertilizer application did not significantly affect chlorophyll content and protein content (p> 0.05).

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Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v38i2.27592 ◽

2016 ◽

Vol 38 (2) ◽

pp. 119 ◽

Cited By ~ 1

Author(s):

Davi De Holanda Cavalcante ◽

Francisco Roberto dos Santos Lima ◽

Vanessa Tomaz Rebouças ◽

Marcelo Vinícius do Carmo e Sá

Keyword(s):

Water Quality ◽

Growth Rate ◽

Nile Tilapia ◽

Specific Growth ◽

Block Design ◽

Intensive Culture ◽

Effluent Quality ◽

Intensive Farming ◽

Randomized Block Design ◽

Underwater Structure

The present work aimed at determining the effects of the association between the periphyton-based system with the bioflocs-based system in the intensive culture of juvenile Nile tilapia (1.56 ± 0.07 g; 72 fish m-3), on variables of water quality, growth performance and effluent quality after 10 weeks. The experiment was arranged in a 2 x 2 factorial randomized block design with four treatments and five repetitions each. The factors tested were the following: ‘underwater structure’ (absence and presence) and ‘adjustment of the C: N ratio of water’ (no and yes). The final fish body weight, specific growth rate and yield were higher (p < 0.05) in the C: N-adjusted tanks. The presence of submerged structures in the tanks had no significant influence on those same variables. It was concluded that the periphyton-based system is not indicated for intensive farming of Nile tilapia, in which there is a high allowance of artificial feed to fish.

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ANALISIS KARAKTER REPRODUKSI DAN PERFORMA BENIH HIBRID IKAN NILA PANDU F6 DENGAN IKAN NILA NILASA (Oreochromis niloticus) Analysis of the Character Reproduction and Seed Hybrid Performance 0f Tilapia Fish F6 Pandu with Nilasa Tilapia (Oreochromis niloticus)

SAINTEK PERIKANAN Indonesian Journal of Fisheries Science and Technology ◽

10.14710/ijfst.12.1.19-23 ◽

2017 ◽

Vol 12 (1) ◽

pp. 19

Author(s):

Dio Patria Yustysi ◽

Fajar Basuki ◽

Titik Susilowati ◽

Tristiana Yuniarti

Keyword(s):

Water Quality ◽

Growth Rate ◽

Survival Rate ◽

Specific Growth Rate ◽

Oreochromis Niloticus ◽

Egg Size ◽

Specific Growth ◽

Fish Farming ◽

Hatching Rate ◽

Feed Conversion

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh dari hibridisasi ikan nila Pandu F6 dengan nila Nilasa terhadap karakter reproduksinya dan performa benih yang dihasilkan. Penelitian ini dilakukan dengan metode eksperimental menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 kali ulangan. Perlakuan dalam penelitian ini: perlakuan A (Pandu F6 ♀><Pandu F6 ♂), B (Nilasa ♀><Nilasa ♂), C (Pandu F6 ♀>< Nilasa ♂), dan D (Nilasa ♀><Pandu F6 ♂). Data yang diamati meliputi fekunditas, daya tetas telur, diameter dan bobot telur, panjang dan bobot larva TL, panjang dan bobot larva lepas kuning telur, kelulushidupan, laju pertumbuhan spesifik, konversi pakan dan kualitas air. Hasil penelitian menunjukan nilai terbaik pada fekunditas sebesar 1191,67 ± 239,45 butir/200 g, daya tetas telur sebesar 80,93 ± 3,90%, kelulushidupan sebesar 81,55 ± 7,54%, laju pertumbuhan spesifik sebesar 7,26 ± 0,25, konversi pakan 0,54 ± 0,02 didapatkan pada perlakuan C, akan tetapi untuk diameter dan bobot telur, panjang dan bobot larva Kuning Telur, dan panjang dan bobot larva lepas kuning telur tidak berbeda nyata. Hasil tersebut menunjukan bahwa hibridisasi (perlakuan C) memberikan pengaruh yang nyata (P < 0,05) terhadap fekunditas, daya tetas telur, kelulushidupan, laju pertumbuhan spesifik, dan konversi pakan tetapi tidak berpengaruh terhadap diameter dan bobot telur, panjang dan bobot larva, dan panjang dan bobot larva lepas kuning telur. Kata kunci: Hibridisasi, Ikan Nila, Karakter Reproduksi, Performa Benih ABSTRACT This research aims to know the influence of hybridization tilapia fish Pandu F6 with nila Nilasa against the character of the reproduction and seed performance. This research was conducted with the experimental method using Random Design complete (RAL) with 4 treatments and three replicates. The treatments in this study: the treatment A (Pandu F6 F6 ♀ >< Pandu ♂), B (Nilasa ♀>< Nilasa ♂), C (Pandu F6 ♀>< Nilasa ♂), and D (Nilasa ♀ >< Pandu F6 ♂). The observed data covering fecundity, hatching rate, egg size, yolk sack larva length and weight, length and weight of the egg yolk off larvae, survival rate, specific growth rate, feed conversion rate, and water quality. The results showed the best value on the fecundity of 1191.67±239.45 eggs/200 g, Hatching rate 80.93 ± 3.90%, Survival rate of 81.55 ± 7.54%, specific growth rate of 7.26 ± 0.25, conversion fodder 0.54 ± 0.02 obtained at the treatment C, but for the diameter and weight of egg, larval length and weight TL, and the length and weight of the yolk egg off larvae for each treatment do not differ markedly. The results showed that hybridization (treatment C) gives a real influence (P < 0.05) of fecundity,hatching rate, survival rate but not with the egg size, larva weight and length, and the length and weight of larvae off yolk. Water quality on the spawning, hatching eggs and larvae found on the maintenance of a decent range for tilapia fish farming Keywords: hybridization, tilapia fish, character of the reproduction, seed performance

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Pengaruh Pemberian Probiotik Berbeda dalam Sistem Akuaponik terhadap Laju Pertumbuhan dan Survival Rate Ikan Lele (Clarias sp.)

Journal of Aquaculture Science ◽

10.31093/joas.v1i1.1 ◽

2017 ◽

Vol 1 (1) ◽

Author(s):

Ayu Herdianti Primashita ◽

Boedi Setya Rahardja ◽

Prayogo .

Keyword(s):

Water Quality ◽

Growth Rate ◽

Survival Rate ◽

Specific Growth Rate ◽

Water Use ◽

Specific Growth ◽

Final Conclusion ◽

Randomized Design ◽

Business Efficiency ◽

Range Test

Catfish (Clarias sp.) is a freshwater fish that is widely cultivated because it is a leading commodity. Increased production of catfish resulted in extra area of cultivated land and water use. The technology suitable to be applied is aquaponic system. In addition to saving land and water use, Aquaponic is also improving business efficiency through the utilization of nutrients from food remains and fish metabolism. Water quality is an important factor for the success of cultivation. Maintenance catfish with the addition of probiotics in aquaponic system can be a solution for maintaining water quality, because it contains bacteria that can increase nitrite to nitrate changes that can be utilized for growth of plants and do not poison the fish. The purpose of this study was to determine the effect of different probiotics in the aquaponic system towards growth rate and survival rate of catfish. The method that used in this research is experimental with completely randomized design (four treat and five repeated) are P0 (control), P1 (probiotic A), P2 (probiotic B) and P3 (probiotic C). Analysis of data processed using Analysis of Variance. If there are significant differences then continued Duncan's Multiple Range Test. The results showed that the giving of probiotics in the aquaponic system is significantly different (p <0.05). The final conclusion is that the addition of probiotics in aquaponic system affect the growth rate and survival rate of catfish. The highest specific growth rate (0.025%/ day) and the highest survival rate (77.8%) contained in the P2 treatment. The lowest specific growth rate (0.019% /day) and the lowest survival rate (64.4%) contained in P0 treatment (control). Keywords : Aquaponic, Catfish, Probiotic, Growth Rate, Survival Rate, Clarias sp.

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Influence of Heavy Metals on the Growth of Chlorella vulgaris

Journal of Biobased Materials and Bioenergy ◽

10.1166/jbmb.2021.2051 ◽

2021 ◽

Vol 15 (3) ◽

pp. 374-379

Author(s):

Bingbing Pang ◽

Mingzhou Zeng ◽

Wenjia Zhang ◽

Fengcai Ye ◽

Changhua Shang

Keyword(s):

Heavy Metals ◽

Water Quality ◽

Growth Rate ◽

Growth Inhibition ◽

Chlorella Vulgaris ◽

Specific Growth ◽

Concentration Level ◽

Water Quality Monitoring ◽

Quality Monitoring ◽

Average Specific Growth Rate

Growth inhibition of chromium (Cr), cadmium (Cd) and lead (Pb) to fresh water microalga Chlorella vulgaris (C. vulgaris) FACHB-8 was examined. These results demonstrated that the concentration level (EC50 value) of three heavy metals (Cr, Cd and Pb) could be utilized as an indicator for evaluating the toxicities of Cr, Cd and Pb for microalga growth. The EC50 values of Cr for C. vulgaris were 0.22, 0.07 and 0.04 mg/L at 24, 48 and 72 h based on Algorithm 2 (%Ir, percent inhibition in average specific growth rate), respectively. The EC50 values of Cd for C. vulgaris were 2.76, 1.08 and 0.93 mg/L at 24, 48 and 72 h based on Algorithm 2, respectively. The EC50 values of Pb for C. vulgaris were 73.21, 65.02 and 48.38 mg/L at 24, 48 and 72 h based on Algorithm 2, respectively. The results laid a good foundation for the application of C. vulgaris in the water quality monitoring.

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Effects of Opened and Closed Spillway Operations of a Large Tropical Hydroelectric Dam on the Water Quality of the Downstream River

Journal of Chemistry ◽

10.1155/2019/6567107 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 4

Author(s):

Fiona-Annilow Wera ◽

Teck-Yee Ling ◽

Lee Nyanti ◽

Siong-Fong Sim ◽

Jongkar Grinang

Keyword(s):

Water Quality ◽

River Basin ◽

Aquatic Organisms ◽

Quality Parameters ◽

Regulated River ◽

Land Uses ◽

Hydroelectric Dam ◽

Water Ph ◽

The Impact

Water quality downstream of a hydroelectric dam is potentially affected by dam operations and other land uses in the river basin. Previous short-distance studies below the large Bakun Dam indicated poorer water quality during closed spillway. However, the extent of the impact is still unknown. Such knowledge is essential for mitigating the impact of the dam. Thus, the objectives of this study were to determine the water quality up to a distance of 210 km under two spillway operations, namely, closed and opened spillways, and also to determine the changes in water quality from the predam condition. Physicochemical parameters were measured at 15 stations along the Rajang River. Results of this preliminary study indicated that there were significant differences in eight out of nine water quality parameters between opened and closed spillway operations with opened spillway showing better water quality. During closed spillway, as we approached the dam, there was an increasing acidity and a decreasing oxygen content. Furthermore, as the water flows downstream, the unhealthy DO level (<5 mg/L) extended up to 165 km and the linear model showed an increasing DO rate of 0.09 mg/L per km. With opened spillway, DO decreased exponentially from 9.74 mg/L towards the downstream direction to 7.67 mg/L. The increasing turbidity and TSS in the downstream direction indicate contributions from erosion due to other land uses. The river is polluted with organics as indicated by COD of Class IV or V with sources from the dam and the activities in the river basin. Compared to the predam condition, the regulated river is less turbid but warmer and higher in ammonia. Closed spillway led to lower DO and acidic water. However, opened spillway water pH and DO were similar to those in the predam condition. Thus, it is recommended that DO be consistently high enough for the health of sensitive aquatic organisms downstream.

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Penentuan bobot kayu apu Pistia stratiotes L. sebagai fitoremediator dalam pendederan ikan gurami Lac. ukuran 3 cm

Jurnal Akuakultur Indonesia ◽

10.19027/jai.15.2.180-188 ◽

2016 ◽

Vol 15 (2) ◽

pp. 180

Author(s):

Kukuh Nirmala ◽

Sulistia Wardani ◽

Yuni Puji Hastuti ◽

Wildan Nurusallam

Keyword(s):

Water Quality ◽

Growth Rate ◽

Feed Efficiency ◽

Specific Growth ◽

Weight Ratio ◽

Stocking Density ◽

Pistia Stratiotes ◽

Water Lettuce ◽

Quality Technology ◽

Absolute Length

ABSTRACT The use of high stocking density in nursery causes a decrease of water quality. Technology that can be used to solvethe low water quality in nursery of giant goramy was phytoremediation using Pistia stratiotes L. Purpose of this research was to determine the best weight ratio between P. stratiotes L. and 33 L water in nursery giant goramy size 3 cm. Giant goramy size 3 cm was maintained in an aquarium and was treated with different weight of P. stratiotes L. consisted of 45 g, 90 g, 135 g, and controls P. stratiotes L. 0 g. Cleaning and water change was done once a week. This research showed that the treatment of P. startiotes L. 45g/33 L water gave the best result in survival rate, absolute length of the growth, specific growth rate, feed efficiency and economically profitable. Keywords: phytoremediation, water lettuce, Osphronemus goramy L., nursery ABSTRAK Penggunaan padat tebar tinggi pada pendederan ikan gurami mengakibatkan kualitas air menjadi buruk. Salah satu teknologi yang bisa digunakan untuk mengatasi kualitas air yang buruk pada pendederan ikan gurami adalah fitoremediasi menggunakan tanaman kayu apu. Tujuan penelitian ini adalah menentukan bobot kayu apu dengan volume air 33 L pada pendederan ikan gurami ukuran 3 cm. Ikan gurami ukuran 3 cm dipelihara di dalam akuarium dan diberi perlakuan bobot tanaman kayu apu berbeda yaitu 45 g, 90 g, dan 135 g, serta kontrol (kayu apu 0 g). Penyiponan dan pergantian air dilakukan setiap satu minggu sekali. Hasil penelitian menunjukkan bahwa perlakuan kayu apu 45 g/33 L air menunjukkan hasil tingkat kelangsungan hidup, pertumbuhan panjang mutlak, laju pertumbuhan bobot harian, efisiensi pakan yang paling baik, serta lebih menguntungkan dibandingkan dengan perlakuan kontrol (kayu apu 0 g). Kata kunci: fitoremediasi, kayu apu, Oshpronemus goramy L., pendederan

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The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

10.21203/rs.3.rs-901563/v1 ◽

2021 ◽

Author(s):

M. M. Majedul Islam ◽

Md. Atikul Islam

Keyword(s):

Escherichia Coli ◽

Water Quality ◽

Surface Water ◽

Environmental Factors ◽

Physicochemical Parameters ◽

Sewage Treatment Plant ◽

Oxygen Demand ◽

Faecal Contamination ◽

E Coli ◽

The Impact

Abstract Faecal contamination of surface water sources is an important water quality issue worldwide. Although quite a few studies exist on surface water faecal contamination and variability of indicator bacteria, most of the studies have been based on larger river basins and in temperate region. The variability is relatively unknown in local scale and in tropical developing countries. In this study we assess how anthropogenic and environmental factors affect faecal contamination and physicochemical parameters in Rupsha and Bhairab rivers around Khulna city, Bangladesh. Water samples were collected from six locations of the rivers during a wet and dry period in 2018 to measure Escherichia coli (E. coli) concentrations. Water physicochemical parameters—temperature, turbidity, pH, dissolved oxygen, biochemical oxygen demand and chemical oxygen demand were also measured. Higher concentrations of E. coli were found in the sampling sites located near the densely populated urban area compared to the downstream site, which receives fewer amounts of discharges from sewer drains. All the E. coli samples violated bathing water quality standards. E. coli concentrations were found to be correlated positively with precipitation and turbidity. A linear regression model was applied, that explains large part of the variation in E. coli concentration (R2 = 0.42). Water quality index assessment was also ranked the water quality as ‘poor’ category; indicate that the water is unsuitable for uses in domestic and recreational purposes and high health risks involved with the water use. The study findings highlight the problem of untreated sewage discharge into the rivers. Implementation of sewage treatment plant with adequate capacity is highly recommended.

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