specific growth rate
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2023 ◽  
Vol 83 ◽  
Author(s):  
S. Abbas ◽  
Asia Iqbal ◽  
K. M. Anjum ◽  
S. Sherzada ◽  
U. Atique ◽  
...  

Abstract We have evaluated the effects of different fish feeds on the body composition, growth, and enzyme activities of Labeo rohita (Rohu). In total, 240 fishes between the average weights of 24.77±2.15g were studied. The treatments were applied in a completely randomized design, with 4 treatments of 60 fishes each. Treatments consisted of four different fish feeds [Oryza (T1), AMG (T2), Aqua (T3), and Supreme (T4)]. Body composition, growth performance, and enzyme activities were evaluated. There was a significant variation in performance of fishes fed with different type of feed; as fishes having Oryza feed showed the highest weight gain, specific growth rate (SGR), and best feed conversion ratio (FCR) as compared to other groups that were considered to be significant (P ≤ 0.05). High net weight gain was obtained in T4 when compared with T2 and T3. FCR value of T4 was less than T1 but higher than T2, T3 and T2, which showed the lowest values. The specific growth rate was recorded as average in T4, but T2 led a high SGR than T3. Similarly, crude protein level and digestive enzymes activity was recorded significantly highest in fed with Oryza (T1) as compared to AMG (T2), Aqua (T3), and Supreme (T4). Water quality parameters were recorded significant in all treatments except pH and DO of treatment (T1), significantly different from other treatments. It was concluded that Rohu (Labeo rohita) could show a promising growth rate and protease enzyme activity when fed with the Oryza feed of 25% protein.


2022 ◽  
Vol 956 (1) ◽  
pp. 012006
Author(s):  
A P A Samad ◽  
M F Isma ◽  
E Ayuzar ◽  
Ilhamdi ◽  
R Humairani ◽  
...  

Abstract Lobster is among freshwater crustaceans which is potentially cultivated in aquaculture system. This present study was conducted to determine the growth and survival rate of freshwater lobster Cherax quadricarinatus fed different forage feed. The experimental methode used a completely randomized design consisted of 4 treatments in triplicate: commercial diet (PL), commercial diet and carrots (PW), commercial diet and potatoes (PK) and commercial diet and sweet potatoes (PU). The experimental lobsters were 5-7 cm in size and 6-8 g in weight. Results indicated that forage feeding can affect the total weight and length, weight gain, specific growth rate and survival rate of lobster. Data showed the best weight gain and specific growth rate were found in PW (34.37±0.30%) and (1.05±0.03%), respectively. The lowest survival rate was seen in PU at 86.67%. However, the best feed conversion ratio gained by PL at 1.74±0.09. This study suggested that the combination of commercial diet with carrots provided the best growth performances in freshwater lobster Cherax quadricarinatus.


2021 ◽  
Vol 11 (4) ◽  
pp. 678-684
Author(s):  
Faiz Tuffah Abizaka ◽  
Gunanti Mahasri ◽  
Daruti Dinda Nindarwi

The application of aquaponics aquaculture is needed to improve water quality, especially the addition of filtration materials which act as absorbent planting mediums for ammonia nitrogen content in toxic water. The purpose of the current study was to determine the effect of the carbon thickness on ammonia levels in Nile tilapia in aquaponics systems with Water spinach. The study used an experimental method with a completely randomized design consisting of four treatments and five replications. The main parameter was ammonia level. Supporting parameters in this study included initial and final growth of Water spinach, fish survival rate, specific growth rate, and water quality which included temperature measurement, dissolved oxygen, and pH. Each treatment consisted of variations of carbon thicknesses at P0 (control), P1 (5 cm), P2 (7 cm), and P3 (9 cm). The results revealed that ammonia levels were significantly different at P1, P2, and P3 in the third and fourth weeks. Ammonia levels during the study decreased from 0.3969 ppm to 0.1741 ppm. The reported value of 7.2 was for acidity degree, 29.3°C for the temperature, 5.94 ppm for dissolved oxygen, 8.42 cm for the growth of Water spinach, 0.44% for the specific growth rate, and 90% for the survival rate. Carbon thickness caused a decrease in ammonia levels in Nile tilapia with aquaponics systems through the medium of Water spinach.


2021 ◽  
Vol 25 (2) ◽  
pp. 122
Author(s):  
Ni Pande Putu Suji Dian Antari ◽  
Ni Luh Watiniasih ◽  
Ayu Putu Wiweka Krisna Dewi

Rumput laut Eucheuma cottonii merupakan salah satu jenis rumput laut yang sering dibudidayakan oleh masyarakat adalah Eucheuma cottonii.  Berat awal bibit yang ditanam dapat berpengaruh terhadap pertumbuhan rumput laut. Hasil penelitian menunjukkan berat bibit rumput laut yang baik digunakan berkisar antara 50-150 gr, namun belum ada penelitian secara detail pada E. cottonii yang ditaman dengan metode rakit apung. Penelitian ini bertujuan untuk mengetahui berat bibit awal rumput laut yang baik untuk pertumbuhan E. cottonii pada metode rakit apung dengan bibit diletakkan di dalam kantong. Penelitian ini terdiri dari 3 perlakuan yaitu perlakuan A dengan berat bibit 50 gr, perlakuan B dengan berat bibit 100 gr, dan perlakuan C dengan berat bibit 150 gr. Penelitian ini dilaksanakan di Pantai Pandawa, Bali, dari bulan Maret-April 2021, dimana data diambil sekali dalam seminggu selama 7 minggu. Hasil penelitian menunjukkan bahwa pertumbuhan rumput laut meningkat setiap minggunya dan berbeda antar perlakuan. Berat akhir rumput laut pada perlakuan A adalah 558,83 gr, perlakuan B sebesar 552,167 gr, dan perlakuan C sebesar 529,67 gr. Pertumbuhan rumput laut pada perlakuan A lebih tinggi dibandingkan perlakuan B dan C. Rata-rata Specific Growth Rate (SGR) pada perlakuan A adalah 4,92 %, perlakuan B sebesar 3,48 %, dan perlakuan C sebesar 2,57 %. Hasil terbaik dari bibit yang digunakan ditemukan pada bibit dengan berat awal 50g, dibandingkan dengan berat bibit yang lain (p<0,002).


Food Research ◽  
2021 ◽  
Vol 5 (S4) ◽  
pp. 21-29
Author(s):  
Anizah M.R. ◽  
S.R. Manaf ◽  
Hilaliyah M.J.N.

Fish meal is generally expended as the foremost protein supply in the fish diet. The rising cost of this component inflicted the aquaculture industry to seek a substitute in lessening the pellet cost. Thus, fish waste was tested in this study to investigate its viability. An experiment was performed to study the effects of fish waste and carcass on the growth performance of Nile tilapia fry. Solid fish waste of three different common species available in Mukah’s wet market was formulated into an artificial diet. The diet was formulated into three treatments consist of three protein levels (40%, 45% and 50%) with 4000 kcal/kg energy. A controlled group was fed with a commercial pellet consisting of 45% protein level. Fish were fed at 4% of body weight twice daily for 45 days. Fry reared in a controlled group was discovered highest weight gain, specific growth rate and length gain. There was no significant difference in all treatments for all parameters measured. The lowest weight gain and specific growth rate were recorded in fish fed 45% protein level (T2) group. Fish in T3 (50%) achieved the highest survival rate while T1 (40%) group recorded the lowest. The best and lowest Feed Conversion ratio (FCR) was recorded in the control group. In conclusion, the performance of formulated feed using fish waste is similar to commercial pellet as no significant difference can be observed in all parameters measured.


Biology ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1236
Author(s):  
Moha Esmaeili

Monitoring fish health in a repeatable and accurate manner can contribute to the profitability and sustainability of aquaculture. Haematological and blood biochemistry parameters have been powerful tools and becoming increasingly common in aquaculture studies. Fish growth is closely related to its health status. A fish with a higher growth rate is more likely to be a healthy one. Any change in the physiological status of the fish, from pollution to nutritional stress, can cause changes in the blood parameters. Various aquaculture studies have measured the following components: red blood cells, white blood cells, haemoglobin, haematocrit, and total protein. However, because these parameters do not always follow the same trend across experimental fish, it is difficult to draw a firm conclusion about which parameter should be considered. Therefore, Blood Performance (BP) as a new formula is introduced, which is a more reliable indicator. This formula is simple and sums up the natural logarithm of the five above-mentioned parameters. More than 90 published peer-reviewed articles that measured these five parameters in the last six years confirmed the reliability and validity of this formula. Regardless of which supplements were added to the diets, the fish with a higher growth rate had higher BP as well. In addition, in 44 studies out of 53 articles, there was a significant positive correlation between specific growth rate and BP. Under different stressful situations, from pollution to thermal stress, the fish under stress had a lower BP than the control. Fish meal and fish oil replacement studies were further evidence for this formula and showed that adding excessive alternative proteins decreased growth along with BP. In conclusion, BP can be a reliable indicator of fish health and growth when it is compared between groups in the same experiment or farm. Although there was a positive correlation between specific growth rate and BP, comparing BP between experiments is not recommended. Standardising the haematological assays can improve the reliability and accuracy of BP across experiments.


2021 ◽  
Vol 11 (22) ◽  
pp. 10902
Author(s):  
Shubhajit Saha ◽  
Azubuike V. Chukwuka ◽  
Dip Mukherjee ◽  
Lipika Patnaik ◽  
Susri Nayak ◽  
...  

Diazinon exposures have been linked to the onset of toxic pathways and adverse outcomes in aquatic species, but the ecological implications on model species are not widely emphasized. The objective of this study was to determine how the organophosphate pesticide diazinon affected hematological (hemoglobin, total red blood count, total white blood count, and mean corpuscular hemoglobin), growth (condition factor, hepatosomatic index, specific growth rate), biochemical (total serum glucose, total serum protein), and endocrine (growth hormone, tri-iodothyronine, and thyroxine) parameters in Clarias batrachus after chronic exposure. Diazinon was administered at predefined exposure doses (0.64 and 1.28 mg/L) and monitored at 15, 30, and 45 days into the investigation. Observation for most biomarkers revealed patterns of decreasing values with increasing toxicant concentration and exposure duration. Correlation analysis highlighted a significant inverse relationship between variables (mean corpuscular hemoglobin, condition factor, specific growth rate, tri-iodothyronine, thyroxine, and total serum protein) and elevated chronic diazinon exposure concentrations. The integrated indices (IBR and BRI) indexes were used to provide visual and understandable depictions of toxicity effects and emphasized the relativity of biomarkers in terms of sensitivity and magnitude or severity of responses under graded toxicant exposures. The significant damage reflected by evaluated parameters in diazinon exposure groups compared to control portends risks to the health of local fish populations, including Clarias batrachus in aquatic systems adjacent to agrarian landscapes.


2021 ◽  
Vol 869 (1) ◽  
pp. 012042
Author(s):  
R Rusydi ◽  
A Yakupitiyage ◽  
S Pumpuang ◽  
S Mellisa ◽  
A Rahma ◽  
...  

Abstract Synechococcus elongatus is unicellularCyanobacteria having fast growth and can conduct photosynthesis process in its cells.This research purposed to evaluate the potential of Synechococcus elongatus as an candidate of biodiesel feedstocks by evaluating its biomass and lipid content in appropriate nutrients. The study was conducted at Asian Institute of Technology, Thailand. The Factorial Completely Randomized Design was used as experimental design in this study. The species was grown in BG II medium which was added by different doses of NaNO3 and KHPO4. Cultivation was conducted for seven days for several parameters, namely appropriate dose of nutrients, specific growth rate, biomass, and lipid content. This study resulted the optimal dose of nitrate from NaNO3 and phosphate from KHPO4 for good growth of Synechococcus elongatus which were 289.11 mg/L of NO3- and 22.26 mg/L of HPO4.This species grew well in BG-II medium added optimal nutrients at specific growth rate of 0.34µg/day. The optimal lipid productivity of Synechococcus elongatus was achieved at day 6th of cultivation which its dried biomass was 0.21±0.03 g/L and total lipid was 1.89±0.28%. Based on the results, Synechococcus elongatus cultivated in BG-II medium was potential tobe biodiesel source with its fast growth and lipid content in its cell.


2021 ◽  
Vol 925 (1) ◽  
pp. 012018
Author(s):  
Munawan ◽  
M Kasim ◽  
Ruslaini

Abstract Eucheuma denticulatum is one of the most widely cultivated macroalga commodities. This commodity produces carrageenan iota as raw material for various industries. This study aims to compare the growth rate of E. denticulatum cultivated by the horizontal net (Horinet) and vertical net (Vertinet) methods. This research was conducted in September-December 2019 and located in Lakeba waters, Bau-Bau City, Southeast Sulawesi, Indonesia. The results showed that the specific growth rate of E. denticulatum seaweed cultivated with Horinet and Vertinet was significantly different. The growth of the thallus at an initial weight of 20 g developed to 67 g and 112.5 g as viewed with a horinet and vertnet, respectively. The specific growth rates of these two methods were 5.01 and 6.59%/day using vertinet and horinet, respectively. Based on the results of the t-test showed that the use of the two methods were significantly different by 0.46 and 0.36 (P<0.05) on the specific growth rate of E. denticulatum seaweed. Both of these methods can be used to cultivate seaweed with good results. However, these two methods have differences in the growth results obtained.


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