scholarly journals Rearing white leg shrimp larvae (Litopenaeus vannamei Boone, 1931) with concentrated diatom (Thalassiosira sp.)

2020 ◽  
Vol 19 (01) ◽  
pp. 59-64
Author(s):  
Nhien V. Tran
Keyword(s):  
Survival Rate ◽  
Body Length ◽  
Litopenaeus Vannamei ◽  
Stocking Density ◽  
The Other ◽  
Marine Aquaculture ◽  
Water Parameters ◽  
Breeding Center ◽  
Significant Difference

The objective of the experiment was to determine the best type of algae for growth, survival rate and the metamorphosis time of white leg shrimp larvae. The experiment consisted of five treatments: dried Spirulina sp. (NT 1), fresh Chaetoceros sp. (NT 2), fresh Thalassiosira sp. (NT 3), Thalassiosira sp. in concentrated form (NT 4) and Thalasiosira sp. in paste form (NT 5). The larvae at Nauplius VI were stocked in 0.5 m3 tank at the stocking density of 200 inds/L. The care regime was applied according to the popular process at the National Breeding Center for Southern Marine Aquaculture. After 10 days of stocking, the water parameters in all treatments were in a suitable range for the growth of larvae. The larvae in NT 4 showed the best body length, survival rate, metamorphosis time and were significant difference compared to the remaining treatments (P < 0.05). Whereas NT 5 was not significantly different (P > 0.05) compared to NT 2 in body length and NT 3 in metamorphosis time. NT 1 showed the worst these characteristics to the other treatments. In general, the use of concentrated Thalassiosira sp. for rearing white leg shrimp larvae gives good results, which should be commonly applied.

scholarly journals Assessment of productivity of pangas catfish (Pangasius pangasius, Hamilton-1822) culture in jute retting pond in Murshidabad district

2021 ◽  
Vol 17 (2) ◽  
pp. 328-334
Author(s):  
Samiran Patra ◽  
Uttam Roy
Keyword(s):  
Survival Rate ◽  
West Bengal ◽  
Disease Incidence ◽  
Stocking Density ◽  
Water Parameters ◽  
Significant Difference ◽  
Final Weight ◽  
Water Ph ◽  
Final Length ◽  
The Mean

Murshidabad district is the highest jute producer district in West Bengal where maximum numbers of ponds beels, canals and irrigational channels are being used for jute retting from July to September and after retting, water bodies remain uncultured. But few farmer’s, they were culture traditionally with IMC and exotic carps and getting very low yield (3.66q ha-1yr-1). In that condition Murshidabad KVK has designed one OFT trails having three treatments, Farmer’s Practice (FP), Technology Option-I (TO-I) and Technology Option-II (TO-II) on air-breathing fish pangas (Pangasius pangasius) and conducted in farmers’ field for three years. To find out the suitable fish species, observed water parameters (pH, DO mg L-1), stocking density (nos./ha), length (cm), weight (g), survival rate (%), yield (q ha-1yr-1), cost of culture (Rs. ha-1yr-1) gross return (Rs. ha-1yr-1), net return (Rs. ha-1yr-1), BC ratio and disease incidence etc. The effect of water pH and DO (mg L-1) in post jute retting pond and fish stocking pond indicate, there were a statistically significant difference between three treatments at (p <.05). Stocking density in three treatments were 15000 nos. ha-1 (IMC and exotic carps), 11250 nos. ha-1 and 15000 nos. ha-1 (pangas, size 2.5”) . In this trial it was observed that the mean (SD) initial length (cm), initial weight (g) and final length (cm) were not statistically significant at p >.05 but in case of final weight (g) and weight gain (g) there were statistically significant at p<.05. The survival rate (%) was lowest in FP (35.04±4.51) and highest in TO-I (67.55±17.50) and not statistically significant (p >.05). The mean (SD) yield (q ha-1yr-1) was high statistically significant difference found among three treatments (p <001). The average net profits were Rs.65680.0, Rs. 223841.0 and Rs. 337551.0 ha-1 yr-1. in FP, TO-I and TO-II, respectively. The highest mean B:C ratio was 2.44 in TO-II. With the all concerned it was observed TO-II gives the best result among these three treatments in these three years trials.

Effects of Different Stocking Densities on Growth, Serum Steroid Hormone Concentrations, Gonadosomatic Index and Sex Reversal in the Rice Field Eel, Monopterus albus (Zuiew)

2011 ◽  
Vol 142 ◽  
pp. 233-237
Author(s):  
Han Wen Yuan ◽  
Fang Chen ◽  
Qiao Qing Xu ◽  
Shi Yuan Gong ◽  
Zhang Jie Chu ◽  
...  
Keyword(s):  
Rice Field ◽  
Steroid Hormone ◽  
Gonadosomatic Index ◽  
Stocking Density ◽  
Sex Reversal ◽  
The Other ◽  
Daily Weight Gain ◽  
Monopterus Albus ◽  
Rice Field Eel ◽  
Significant Difference

The effects of stocking density on various growth parameters and sex reversal in the rice field eel (Monopterus albus) were investigated by evaluating steroid hormone, the gonadosomatic index (GSI) and sex ratio. Fish (mean initial weight of 9.88 ± 0.70 g) were stocked to densities of 4, 20, 36, 52, 68, 84 or 100 fish/m2 in cages (2 m × 1 m × 1.5 m) in a pond, with five replicate cages for each density. Fish were fed for 420 days on a formulated isocaloric diet containing 40.22% crude protein and 12.86 MJ/kg. Serum E2 and T concentrations were determined by radioimmunoassays. There were no significant differences in final bodyweight (FBW) and daily weight gain (DWG) for fish in the groups containing less than 52 fish/m2, while FBW and DWG were significant lower in groups at 68 fish/m2 or more. Specific growth rate (SGR) differed significantly between the 84 and 100 fish/m2 groups compared with the 4, 20 and 36 fish/m2 groups. There was no significant difference in SGR in groups containing less than 84 fish/m2. There were no significant difference between the 4 and 20 fish/m2 groups in net yield (NY), but these groups did differ significantly from the other groups. The final condition factors of fish stocked at 84 or 100 fish/m2 were significantly lower than fish stocked at the other densities. E2 and T hormone concentrations declined as stocking density increased, while GSI values increased initially but then reduced with increasing stocking density. Female ratio and survival decreased with increasing stocking density. The proportion of male fish was significantly greater in the three highest stocking density groups. Therefore, high stocking density may promote sex change from female to male in M. albus.

scholarly journals Water quality, growth and production performance of stinging catfish, Heteropneustes fossilis (Bloch) in cemented tanks with two different stocking densities

2019 ◽  
Vol 47 (1) ◽  
pp. 107-119
Author(s):  
Dulon Roy ◽  
Abdullah Al Masud ◽  
Pritam Kumar Saha ◽  
MM Kutubuddin ◽  
Md Muzahidul Islam
Keyword(s):  
Water Quality ◽  
Body Weight ◽  
Survival Rate ◽  
Stocking Density ◽  
Culture Technique ◽  
Production Performance ◽  
Heteropneustes Fossilis ◽  
Tank Culture ◽  
Significant Difference ◽  
T1 And T2

Attempt has been taken to develop intensive tank culture technique providing natural environment for Stinging catfish (Heteropneustes fossilis) inside tank to increase survival rate as well as production. The experiment was conducted for a period of 150 days in two tanks (T1 and T2) of 300 m2. Fish fries with a mean weight and length ranged from 1.02 to 2.2 g and 2.7 to 3.5 cm were stocked in T1 and T2, respectively. Stocking density of fingerlings were 1, 25,000 and 1, 50,000 per Ha in T1 and T2, respectively. Commercial pelleted feed was supplied to tank reared fish twice daily at a rate of 3-10% of body weight per day and later feeding rate was adjusted based on body weight by sampling. Important water quality parameters (temperature, DO, pH, transparency, ammonia and nitrate) were recorded weekly throughout the culture period. Survival rate was 87% and 84% in T1 and T2, respectively. Mean final weight were 41.73 ± 2.09g and 40.6 ± 0.90 g in T1 and T2, respectively. Length-weight relationship indicates that the growth rate was always higher in T1 followed by T2. Results showed that net yield was relatively higher in T2 (5115.35 ± 113.13 Kg/ha) than T1 (4537.12 ± 227.4 Kg/ha). In case of production, there was significant difference (p < 0.05) between two treatments. This experiment demonstrated the potential of H. fossilis production through new technique of tank culture system. However, more research is needed using local feed ingredients with higher stocking density. Bangladesh J. Zool. 47(1): 107-119, 2019

scholarly journals Effect of fertilization and density on the survival rate and growth of post-larva of shrimp vaname (Litopenaues vannamei)

2017 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
Ernawati Ernawati ◽  
Rochmady Rochmady
Keyword(s):  
Data Analysis ◽  
Survival Rate ◽  
Litopenaeus Vannamei ◽  
Stocking Density ◽  
Fertilizer Treatment ◽  
Animal Test ◽  
Absolute Growth ◽  
The Absolute ◽  
Density Treatment

The aim of this research is to know the effect of fertilization and density on survival rate and the absolute growth of post-larvae of shrimp vanname (Litopenaeus vannamei). The study was conducted from 18 August to 5 September 2013 at Oensuli ponds, Kabangka, Muna Regency, Indonesia. The research used animal test of vaname shrimp stadium PL6, a fertilizer of Urea and TSP. The study used styrofoam container, 75 cm long, 37 cm wide, and 27 cm high. Research using Factorial RAL, fertilization and density used three levels, three replications, so that the experiment of 27 units. The fertilizer treatment consisted of no-fertilizer (Control), combination Urea 0.5 g/TSP 0.7 g (P2), combination Urea 0.7 g/TSP 0.9 g (P3). The density treatment consists of density 9 ind/container (Control), density 14 ind/container (KP2) and density 19 ind/container (KP3). Parameters observed survival rate (SR) and absolute growth (G). Data analysis using ANOVA (a0,05) with IBM SPSS Statistic 22. The results showed that fertilization and stocking density had a significant effect on survival and post larvae growth of vaname shrimp. The optimum use of 0.7 g/TSP 0.9 g urea per container. The optimum fertilizer composition of growth was Urea 0.5 g/TSP 0.7 g per container. The best survival rate through a combination of Urea 0.7 g/TSP 0.9 g, density 9 ind per container, equivalent Urea 26 kg/TSP 33 kg density 333.000 ind per ha. The best growth through a combination of Urea 0.5 g/TSP 0.7 g, density 9 ind per container or Urea 19 kg/TSP 26 kg, density 333.000 ind per ha.

scholarly journals Effects of rotifer densities on larval performance of spotted scat (Scatophagus argus)

2021 ◽  
Vol 13 (Aquaculture) ◽  
pp. 37-43
Author(s):  
Quoc Viet Le ◽  
Van Khanh Ly ◽  
Thi My Han Duong ◽  
Nguyen Duy Khoa Tran ◽  
Tomonari Kotani ◽  
...  
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Body Length ◽  
Fish Larvae ◽  
Larval Growth ◽  
Larval Performance ◽  
Scatophagus Argus ◽  
Wide Range ◽  
Significant Difference ◽  
Set Up

This study is aimed to determine the optimal rotifer feeding density for larviculture of spotted scat fish (Scatophagus argus). The experiment was randomly set up in triplicate with 5 treatments including 5, 10, 15, 20 and 25 rotifers/mL. The fish larvae with the initial body length and depth at 2,343 ± 110 µm and 812 ± 85µm, respectively, were stocked in 250-L tanks at 10 larva/L of density and 25‰ of salinity. After 21 days of rearing, the results showed that the larval growth were at 243 – 330 µm/day of DLG and 5.50 – 6.70 %/day of SGRL; 131 –204 µm/day of DDG and 7.20 – 8.93 %/day of SGRD, but no significant difference in larval growth performance was recorded among treatments (p>0.05). However, the highest survival rate of fish larvae (35.4-48.1%) was recorded in the treatments fed 5 and 10 rotifers/mL and was significantly higher than other treatments (p<0.05). The data demonstrated that spotted scat larvae fed effectively across as wide range of rotifer densities and the range at 5-10 rotifers/mL were suggested for the husbandry practices.

scholarly journals Influence of stocking density on water quality and growth performance of white leg shrimp (Litopenaeus vannamei) reared in fiberglass tanks, without water exchange

2019 ◽  
Vol 18 (06) ◽  
pp. 14-22
Author(s):  
Tu P. C. Nguyen
Keyword(s):  
Water Quality ◽  
Survival Rate ◽  
Growth Performance ◽  
Linear Relationship ◽  
Litopenaeus Vannamei ◽  
Water Exchange ◽  
Stocking Density ◽  
Quality Parameters ◽  
Final Weight ◽  
Ad Libitum

The present study evaluated the effects of stocking density on water quality parameters, growth performance and survival rate of white leg shrimp Litopenaeus vannamei, reared in fiberglass tanks, without water exchange. Three stocking densities (50, 100 and 200 shrimp/m2) were tested. Each treatment consisted of three replicates fiberglass tanks (500 L). The shrimp were fed ad libitum four times per day with a commercial pellet (40-42% protein). After an 8-week trial, concentrations of nutrients in the culture tanks showed an increasing linear relationship with increasing stocking density. The growth performance of shrimp in low stocking densities was significantly greater than that in high stocking densities. The results from this study demonstrate that with increasing the stocking density the production of shrimp increased but in a low final weight and survival compared to low stocking density.

scholarly journals Growth and survival rate vannamei shrimp (Litopenaeus vannamei) in various doses of fertilizer and density

2018 ◽  
Vol 2 (2) ◽  
pp. 53 ◽  
Author(s):  
Abdul Rakhfid ◽  
Udin Mauga
Keyword(s):  
Water Quality ◽  
Survival Rate ◽  
Litopenaeus Vannamei ◽  
Stocking Density ◽  
Shrimp Farming ◽  
Experimental Unit ◽  
Random Group ◽  
Factor B ◽  
Growth And Survival ◽  
Density Factor

Vannamei shrimp (Litopenaeus vannamei) is a commodity that is expected to not only increase options for farmers but also sustain the rise of shrimp farming business in Indonesia. One important factor in shrimp farming is the availability of feed. In addition to the availability of natural feed during cultivation, stocking density is also very influential in the survival rate and growth of shrimp vannamei. The research was conducted in September-December 2016 farms Bonea Village District of Lasalepa Muna with Test the different dosages with different stocking density. The study used a Random Group Factorial, which is based fertilization (Factor A) with three levels and stocking density (Factor B) as many as three levels, each with three replications so that all 27 units experimental unit. The results showed that the combination of factors dose of 0.7 g of urea + 0.9 g TSP and stocking density factor of 10 individuals per container provides prawn post larvae growth vannamei most excellent and a combination of factors Urea fertilizer dosage of 0.9 g TSP + 1.1 g and stocking density factor of 20 individuals per container provides a survival rate of post larvae vannamei most good. Water quality media for research in the range that is optimal for the growth and survival of post larvae vannamei.

scholarly journals EFFECTS OF FEED ON THE SURVIVAL RATE, GROWTH RATE AND METAMORPHOSIS TIME OF THE WHITE LEG SHRIMP LARVAE (Litopenaeus vannamei Boone, 1931) AT ZOEA STAGE

2018 ◽  
Vol 54 (4A) ◽  
pp. 205
Author(s):  
Nguyen Van Cong
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Litopenaeus Vannamei ◽  
Survival Rates ◽  
Stocking Density ◽  
Growth And Survival ◽  
Study Results

The larvae of white leg shrimp (Litopenaeus vannamei Boone, 1931) at phase nauplii 6 fed with a stocking density of 150 pcs per litre and 3 formula including formula 1 with dry microalgae Spirulina + artemia as main ingredients, formula 2 with microalgae Thalasiosira weissflogii + artemia as main ingredients and formula 3 with microalgae Thalasiosira pseudonana + artemia as main ingredients. Experiments were carried out in 18 tanks fifty-litre composite at Quang Binh branch of C.P Vietnam Corporation. The study results show that, with formula 3, white leg shrimps larvae at zoea stage have the highest growth and survival rates (86.57 %), followed by formula 2 (76.03 %) and finally formula 1 (67.90 %). White leg shrimps larvae at zoea stage in formula 3 have the shortest metamorphosis time (78.61 hours), followed by formula 2 (83.25 hours) and the longest in formula 1 (94.10 hours).

scholarly journals THE EFFECT OF FEEDING Lactobacillus ON GROWTH, SURVIVAL RATE AND PROTEASE ACTIVITY OF Litopenaeus vannamei

2011 ◽  
Vol 6 (2) ◽  
pp. 141
Author(s):  
Nunak Nafiqoh ◽  
Poh-Shing Chang ◽  
Yu-Chi Wang
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Lactobacillus Plantarum ◽  
Litopenaeus Vannamei ◽  
Protease Activity ◽  
Lactobacillus Casei ◽  
Digestive Organ ◽  
Significant Difference ◽  
Effect Of Feeding ◽  
Control Tank

This study examined the effect of two Lactobacillus bacteria on protease activity and growth rate of Litopenaeus vannamei. An experiment was conducted to examine protease activity and growth rate. The experiment consisted of two treatment tanks, the first tank was provided with artemia immersed in 2.6 x 1016 cfu/mL of bacteria solution, the second tank served as the control tank. After 20 days, the L. vannamei in the tank that received Lactobacillus have significantly different in growth, survival rate and protease activity (P<0.05) compared to the control, but no significant difference between Lactobacillus casei and Lactobacillus plantarum treatments. Within the digestive organ, protease activity of hepatopancreas and stomach demonstrated significant higher activity (P<0.05) compared to the intestine.

scholarly journals Growth performance and survival rate of catfish (Pangasianodon hypophthalmus) juvenile which is reared in recirculation system

2020 ◽  
Vol 20 (3) ◽  
pp. 271
Author(s):  
Yuke Eliyani ◽  
Iin Siti Djunaidah ◽  
Sujono Sujono
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Survival Rates ◽  
Stocking Density ◽  
Fish Growth ◽  
Water Volume ◽  
Bacillus Sp ◽  
Pangasianodon Hypophthalmus ◽  
Significant Difference ◽  
Recirculation System

Although recirculation is a cultivation system that has been tried in various commodities, but the effectiveness of this system to the growth and survival of catfish juvenile has not been done. This study aims to determine the effective-ness of recirculation system on growth performance and survival rate of catfish juvenile (Pangasianodon hypophthal-mus). The research was conducted from 11 October to 30 November 2019 at hatchery unit Department of Fisheries Extension, Jakarta Technical University of Fisheries. This study used experimental method with 3 treatments, namely Control (K: 100% Bioball + Bacillus sp.), Treatment 1 (P1: 50% Bioball + 25% zeolite + 25% resin + Bacillus sp.) and Treatment 2 (P2: Bioball 25 % + zeolit 50% + resin 25% + Bacteria Bacillus sp.). The catfish used in this study was measured 0.08 + 0.02 g. Ind.-1. The fish were kept in a concrete tub of 100 cm x 150 cm x 70 cm with water volume of 750 liters tub-1. Stocking density of fish was 5 fish liters-1. Fish juveniles were fed with commercial feed with a dose of 3% of fish biomass with frequency of 3 times a day-1. Observation fish growth and water sampling for monitoring of the abundance of nitrogen-decomposing bacteria and water quality were carried out every 15 days. The results showed that the highest growth weight of catfish seedlings was found in treatment P1 (0.447±0.142b) compared with K (0.377±0.047a) and P2 (0.363±0.057a) treatment. The values of survival rate for K, P1 and P2 treatments were 51±8, 54±4 and 52±8, respectively. This result implies that no significant difference in the survival rates in all treatments.

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