scholarly journals Growth performance and nutritional quality enrichment of Phronima pacifica by Chlorella vulgaris and Chaetoceros calcitrans as natural feed

2020 ◽  
Vol 21 (9) ◽  
Author(s):  
Vivi Endar Herawati ◽  
Zumalallail Nailulmuna ◽  
Nurmanita Rismaningsih ◽  
Johannes Hutabarat ◽  
Pinandoyo Pinandoyo ◽  
...  
Keyword(s):  
Growth Rate ◽  
Population Density ◽  
Growth Performance ◽  
Chlorella Vulgaris ◽  
Nutritional Quality ◽  
Stocking Density ◽  
Nutrient Content ◽  
Nutritional Content ◽  
Density Growth ◽  
Chaetoceros Calcitrans

Abstract. Herawati VE, Nailulmuna Z, Rismaningsih N, Hutabarat J, Pinandoyo, Elfitasari T, Riyadi PH, Radjasa OK. 2020. Growth performance and nutritional quality enrichment of Phronima pacifica by Chlorella vulgaris and Chaetoceros calcitrans as natural feed. Biodiversitas 21: 4253-4259. Phronima pacifica as a natural feed has the potential to replace Artemia sp. because of its high nutritional content. The purpose of this study was to determine the effects of different types of feed for P. pacifica during its culture on its population density, growth rate, and nutritional content because of its potential use as a natural feed for fish. The test animals in this study consisted of P. pacifica at a stocking density of 3 ind/L, which were cultured for 18 d. Then, Chlorella vulgaris and Chaetoceros calcitrans were introduced as enrichment feed for P. pacifica. This study used a completely randomized design with three treatments and three replications. The treatments were as follows: A (100% Chlorella vulgaris), B (100% Chaetoceros calcitrans), and C (50% Chlorella vulgaris and 50% Chaetoceros calcitrans). The results showed that treatment increased the population density of P. pacifica by up to 54.67 ± 0.0038 ind/L by the 12th day. Based on the results of proximate analysis for amino acid and fatty acid profiles, the highest values for proteins and fats were in P. pacifica enriched with Chlorella vulgaris (A) and consisted of 45.45% protein, 7.57% fat, 5.95% eicosapentaenoic acid, and 39.23% lysine. Based on an ANOVA, feeding of P. pacifica with Chlorella vulgaris and Chaetoceros calcitrans had a significant effect on population density, relative growth rate, biomass production, and nutrient value of proteins and fats of P. pacifica (P < 0.05). The best results, including population density, growth rate, weight of biomass, and nutrient content of P. pacifica, occurred after feeding with Chlorella vulgaris.

scholarly journals Growth performance of siamese gourami Trichopodus pectoralis seed with different stocking density to optimize production capacity: optimum temperature and salinity application

2018 ◽  
Vol 47 ◽  
pp. 02007
Author(s):  
Lies Setijaningsih ◽  
Dewi Puspaningsih ◽  
Imam Taufik
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Specific Growth Rate ◽  
Growth Performance ◽  
Specific Growth ◽  
Production Capacity ◽  
Stocking Density ◽  
Optimum Temperature ◽  
Slow Growth Rate ◽  
Randomized Design

Fulfill needs of Siamese gourami still rely on the catch from nature, so the population in nature has become decreased. The increase of Siamese gourami fish production from culture is still constrained by the survival rate and slow growth rate in the seed phase. The purpose of this research was to determine the effect of Siamese gourami stocking density on the application of optimum temperature and salinity to growth performance for optimization of production capacity. Application of optimum temperature and salinity refers to the results of previous research, i.e., temperature of 28 °C and salinity 3 ‰. Siamese gourami seed with length of 2.96 ± 0.42 cm and weight of 5.27 ± 0.10 g used in the research. The experimental design used completely randomized design with four treatments, i.e. 1 fish L-1, 2 fish L-1, 3 fish L-1 and 4 fish L-1. The results showed that there were an effect of different stocking density on absolute growth weight and length, survival rate, specific growth rate and productivity. This is shown in the C treatment which growth was 4.95 ± 0.037 g, length 3.51 ± 0.01 cm, survival rate 93.47%, specific growth rate 1.22% and fish productivity of 625.76 g.

scholarly journals INMOVILIZACIÓN DE LAS MICROALGAS Scenedesmus ovalternus (Scenedesmaceae) Y Chlorella vulgaris (Chlorellaceae) EN ESFERAS DE ALGINATO DE CALCIO

2016 ◽  
Vol 21 (2) ◽  
pp. 437-442
Author(s):  
Mario Andres Forero-Cujiño ◽  
Luis Carlos Montengro Ruiz ◽  
Gabriel Antonio Pinilla-Agudelo ◽  
Luz Marina Melgarejo-Muñoz
Keyword(s):  
Growth Rate ◽  
Population Density ◽  
Chlorella Vulgaris ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Calcium Alginate Beads ◽  
The Stability ◽  
Kinetics Of

<p>En este trabajo se describe la técnica de inmovilización de microalgas en esferas de alginato de calcio. Se emplearon las especies Scenedesmus ovalternus y Chlorella vulgaris, se determinó la estabilidad de las esferas, la cinética de crecimiento y la concentración de las microalgas en el interior de las esferas. Chlorella vulgaris alcanzó mayores densidades poblacionales y tasas de crecimiento más altas cuando se inmovilizó en concentraciones del 10 % v/v con el alginato (1,31*10<span>6 </span>cél/ml). Para Scenedesmus ovalternus se observó una mayor densidad poblacional y una mayor tasa de crecimiento cuando se inmovilizó en concentraciones del 20 % v/v (7,06*10<span>5 </span>cél/ml). Estos resultados son útiles para aplicaciones prácticas de las algas encapsuladas, tales como el biomonitoreo o la biorremediación.</p><p><strong>Immobilization of Microalgae<em> Scenedesmus ovalternus</em> (Scenedesmaceae) and <em>Chlorella vulgaris</em> (Chlorellaceae) in Calcium Alginate Beads</strong></p><p>This paper describes the immobilization technique of microalgae in calcium alginate beads. Scenedesmus ovalternus and Chlorella vulgaris species were used. The stability of beads, the kinetics of growth and the concentrations of microalgae inside the beads were determined. The higher density and the upper growth rate of Chlorella vulgaris occurred when it was immobilized in alginate at a concentration of 10 %v/v (1,31*10<span>6 </span>cél/ml). Scenedesmus ovalternus achieved a higher population density and an elevated growth rate when it was immobilized at a concentration of 20 % v/v (7,06*10<span>5 </span>cél/ml). These results are useful for subsequent applications of the encapsulated algae, such as biomonitoring and bioremediation.</p>

Prediction Vulnerability Level of Dengue Fever Using KNN and Random Forest

2020 ◽  
Vol 4 (3) ◽  
pp. 531-536 ◽  
Author(s):  
Abduh Salam ◽  
Sri Suryani Prasetiyowati ◽  
Yuliant Sibaroni
Keyword(s):  
Growth Rate ◽  
Wind Speed ◽  
Random Forest ◽  
Population Density ◽  
Dengue Virus ◽  
Dengue Fever ◽  
Population Mobility ◽  
Density Growth ◽  
The Government ◽  
Over Time

Indonesia is a country that is prone to Dengue Fever, this happens because Indonesia is a country with a tropical climate. More than 50 years after Indonesia contracted the dengue virus, dengue fever cases have not been resolved, currently the cases that occur are greatly increased over time this happens because of factors that cause dengue fever. By considering this serious problem, the authors created a system that can predict the vulnerability level in Bandung and looks for the factors that most influence from all factors of Dengue Fever using the KNN Algorithm and Random Forest. The results of the system show the results of the best model is KNN algorithm with RMSE 29,26, and from the model shows the most influencing factors are population density, growth rate population mobility, rainfall, wind speed. by utilizing the results of the study, the government can adjust actions to each level of sub-district vulnerability and pay more attention to the factors that most influence dengue fever according to the results of the study.

scholarly journals Sustainable Marine Aquaponics: Effects of Shrimp to Plant Ratios and C/N Ratios

2021 ◽  
Vol 8 ◽  
Author(s):  
Yu-Ting Chu ◽  
Paul B. Brown
Keyword(s):  
Growth Performance ◽  
Food Systems ◽  
Production Systems ◽  
Density Ratio ◽  
Stocking Density ◽  
Nutrient Content ◽  
Operational Parameters ◽  
Whiteleg Shrimp ◽  
Salsola Komarovii ◽  
Density Ratios

Integrated aquaponic food production systems are capable of producing more food on less land using less water than conventional food systems, and marine systems offer the potential of conserving freshwater resources. However, there have been few evaluations of species combinations or operational parameters in marine aquaponics. The goal of this experiment was evaluation of stocking density ratio of Pacific whiteleg shrimp (Litopenaeus vannamei) to three edible halophytes (Atriplex hortensis, Salsola komarovii, and Plantago coronopus) with two C/N ratios in a 3 × 2 factorial design. There were three stocking density ratios (shrimp: plant), 2:1, 3:1, and 5:1; and two C/N ratios, 12 and 15. The results indicated that stocking density ratio exerted a significant impact on shrimp growth. Shrimp reared in 2:1 and 3:1 treatments had better growth performance. In contrast, plants were affected by both stocking density ratio and C/N ratio. Halophytes grown in stocking density ratios of 3:1 and 5:1 with a C/N ratio of 15 had better growth performance and nutrient content. The concentrations of TAN and NO2– were below 0.2 mg/L throughout the experiment, including the higher stocking density ratio treatments. In conclusion, the stocking density ratio of 3:1 with a C/N ratio of 15 was suggested as the optimal condition for the operation of marine aquaponics in which whiteleg shrimp and the three halophytes are target crops.

scholarly journals Nutritional Content of Sliced Bread Available in Quebec, Canada: Focus on Sodium and Fibre Content

Nutrients ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 4196
Author(s):  
Marie Le Bouthillier ◽  
Julie Perron ◽  
Sonia Pomerleau ◽  
Pierre Gagnon ◽  
Marie-Ève Labonté ◽  
...  
Keyword(s):  
Food Quality ◽  
Nutritional Quality ◽  
Nutritional Value ◽  
Nutrient Content ◽  
Sodium Content ◽  
Fibre Content ◽  
Nutritional Content ◽  
Nutritional Values ◽  
Sales Data

Bread is a highly consumed food and an important source of nutrients in the diet of Canadians, underlining the need to improve its nutritional quality. The Food Quality Observatory (Observatory) aimed to evaluate the nutritional value of the sliced bread products available in Quebec (Canada), according to their grain type and main flour. Analyses included comparing the bread’s sodium content to Health Canada’s daily values (DV) and sodium voluntary targets, comparing the bread’s fibre content thresholds with the source of fibre mentioned, and assessing whether the main flour was associated with the nutrient content. The nutritional values of 294 sliced breads available in Quebec were merged with sales data (from October 2016 to October 2017), with 262 products successfully cross-referenced. The results showed that 64% of the breads purchased were ‘low’ in fibre (i.e., below 2 g per two slices), while 47% were ‘high’ in sodium (i.e., above 15% DV per two slices). Attention should be paid to 100% refined grain bread and to bread with refined flour as the main flour, since they are great sellers, while showing a less favourable nutrient content. This study shows that there is room for improvement in the nutritional content of Quebec’s bread offer, particularly regarding sodium and fibre content.

scholarly journals Growth performance of African catfish Clarias gariepinus cultured in biofloc system at high stocking density

2017 ◽  
Vol 16 (2) ◽  
pp. 255
Author(s):  
Petrus Hary Tjahja Soedibya ◽  
Taufik Budhi Pramono ◽  
Emyliana Listiowati
Keyword(s):  
Growth Rate ◽  
Growth Performance ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
African Catfish ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Absolute Growth Rate ◽  
Energy Retention ◽  
Absolute Growth

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"><em> </em></p><p class="NoParagraphStyle">This study was aimed to analyze the growth performance of African catfish <em>Clarias gariepinus</em> cultured in the biofloc system at high stocking density. African catfish with an average weight of 1.85±0.09 g were cultured in four units of tarpaulin tank at a diameter of 1.72 m and a height of 1.05 m with a volume of ±2,000 L at the different density of 1,000 fish/m<sup>3</sup>; 1,500 fish/m<sup>3</sup>; 2,000 fish/m<sup>3</sup>; 2,500 fish/m<sup>3</sup>. During rearing period, fish were given the artificial feed with protein contents of 28.75% with the frequency of twice a day, as much as 3% of the body weight. The results showed that different treatment of high stocking density in the biofloc system had a significant effect on the absolute growth rate, lipid retention and energy retention (P&lt;0.05) but not significant effect on daily growth rate. The results showed that the highest lipid retention and energy retention were found in the group of fish treated at a stocking density of 2,500 fish/m<sup>3</sup> but declining protein retention and growth in fish occurred. The highest absolute growth rate and daily growth rate were shown by treatment with a stocking density of 1,500 fish/m<sup>3</sup>.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: growth, stocking density, biofloc <em></em></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong><strong></strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk menganalisis performa pertumbuhan ikan lele dumbo Clarias gariepinus yang dipelihara pada sistem bioflok dengan padat penebaran tinggi.  Ikan uji memiliki berat rata-rata 1,85±0,09 g yang dipelihara pada kolam terpolin berdiameter 1,72 m dan tinggi 1,05 m dengan volume air ±2.000 L sebanyak empat unit dengan kepadatan yang berbeda yaitu 1.000 ekor/m<sup>3</sup>, 1.500 ekor/m<sup>3</sup>, 2.000 ekor/m<sup>3</sup>, 2.500 ekor/m<sup>3</sup>. Selama 40 hari masa pemeliharaan, ikan diberi pakan buatan berkadar protein 28,75% dengan frekwensi dua kali sehari, sebanyak 3% dari berat tubuh. Hasil penelitian menunjukkan bahwa perlakuan perbedaan padat penebaran tinggi pada sistem bioflok memberikan pengaruh yang nyata terhadap pertumbuhan mutlak, retensi lemak dan retensi energi (P&lt;0,05) namun tidak memberikan pengaruh nyata terhadap laju pertmbuhan harian. Hasil penelitian menunjukkan bahwa semakin tinggi padat penebaran terjadinya peningkatan retensi lemak dan retensi energi yaitu pada perlakuan padat penebaran 2.500 ekor/m<sup>3</sup> tetapi terjadi penurunan nilai retensi protein dan pertumbuhan pada ikan. Nilai pertumbuhan mutlak tertinggi ditunjukkan oleh perlakuan dengan padat penebaran 1.500 ekor/m<sup>3</sup>.  </p><p class="NoParagraphStyle">  </p><p>Kata kunci: pertumbuhan, padat tebar, bioflok</p>

scholarly journals Growth Performance of Daphnia sp. Cultured in Different Concentration of Rice Washing Water

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Lukman Anugrah Agung ◽  
Muh. Herjayanto ◽  
Edo Ahmad Solahudin ◽  
Rizky Muliani Dwi Ujianti
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Population Density ◽  
Specific Growth Rate ◽  
Growth Performance ◽  
Specific Growth ◽  
Growth Parameters ◽  
Initial Density ◽  
Young Stage ◽  
Washing Water

Abstract. This study aimed to investigate the effect of the administration of rice washing water in culture medium on the growth performance of Daphnia sp. This research using three different doses of rice washing water i.e 1 mL/L, 3mL/L, and 5 mL/L. Daphnia sp. was cultured with an initial density of 20 ind/L. Observed parameters include growth parameters (population density, size and specific growth rate) and water quality. This result showed that a concentration of 3 mL/L created the highest population of Daphnia sp. density about 620±20 ind/L, number small size (young stage) 81.2%, and the highest specific growth rate about 56.68±0.55%. The water quality content of  DO, temperature and pH during this study were in the good range of Daphnia sp. life and reproduction. The research has a conclusion that rice washing water can be used to nutritional sources of Daphnia sp. In the future, it is necessary to make further observations about the reproductive performance of Daphnia sp, given rice washing water through clone culture.Keywords: Live food, Population density, Rice washing water, Size of Daphnia sp., Specific growth rate

scholarly journals EFFECT OF STOCKING DENSITY ON THE GROWTH PERFORMANCE OF RED TILAPIA IN ZEOLITE SUPPLEMENTED CLOSED SYSTEM

2021 ◽  
Vol 83 (5) ◽  
pp. 85-92
Author(s):  
Ku Boon Hong ◽  
Musfiroh Jani ◽  
Rabiatul Adawiyah Meor Mohamad Zain ◽  
Norashikin Mohd Fauzi
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Growth Performance ◽  
Closed System ◽  
Specific Growth ◽  
Stocking Density ◽  
World Population ◽  
Red Tilapia ◽  
Significant Difference ◽  
Length Gain

Food demand is expected to surge due to the increase of world population. Malaysia is one of the top fish consumption countries in Asia, but the reduction of capture fishery has led to the increase for aquaculture for tilapia to overcome the demand. Thus, the objective of this study was to compare the growth performance of red tilapia at different stocking densities of zeolite supplemented closed system. Red tilapia fry was stocked into aquarium. Five treatments (containing zeolite and without zeolite) with two replicates were used. Food was given twice a day with 2% of total biomass of the fish. Weight and length of red tilapia were measured every two weeks. The zeolite treatments which recorded the highest final mean weight was T1 with the lowest stocking density (5 fish) while in T5 (highest stocking density), lowest mean weight was recorded. Specific growth rate and length gain in T1 was significantly higher than other treatments. On the other hand, there was no significant difference in growth parameters between the treatments with and without zeolite. The results revealed that red tilapia stocked in the T1 of the lowest stocking density (5 fish) had the highest growth performance than the fish in other treatments. Compared to other treatments, T1 recorded the highest final length and weight, weight and length gain, Specific Growth Rate % (SGR) among the treatments. The findings will be useful for the practitioners to understand the best practice for stocking density in zeolite supplemented closed system.

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