scholarly journals Observations on the laboratory culture of the harpacticoid copepod Euterpina acutifrons (Dana, 1847) using different diets

2016 ◽  
Vol 63 (4) ◽  
Author(s):  
S. Jasmine ◽  
Rani Mary George ◽  
S. Lazarus
Keyword(s):  
Rice Bran ◽  
Mass Culture ◽  
Harpacticoid Copepod ◽  
Isochrysis Galbana ◽  
Laboratory Culture ◽  
Cow Dung ◽  
Mixed Diet ◽  
Groundnut Oil ◽  
Mean Values ◽  
Euterpina Acutifrons

Hatching success, nauplii production, maturation and survival of the harpacticoid copepod Euterpina acutifrons (Dana, 1847) fed on mono/mixed culture of Isochrysis galbana, Tetraselmis gracilis, Chaetoceros calcitrans and Chlorella marina were studied. The time taken for E. acutifrons to mature was the lowest with a diet of I. galbana followed by C. calcitrans. Percentage of survival was highest with a mixed diet of 75% I. galbana and 25% C. calcitrans (84%) followed by T. gracilis (68%). The study also revealed that both feed type and concentration played significant role in production and survival of E. acutifrons. Mixed diet of I.galbana and C. calcitrans showed maximum adult production followed by a diet of T.gracilis. The mean values of all the three stages of the copepod viz., adults, ovigerous females and copepodite-nauplii were found much greater in the treatment with replacement of the culture medium and feed. Mass culture using different organic feeds was also carried out and it was found that mean growth in terms of adult stage production was found to be higher when fed with rice bran followed by groundnut oil cake (GOC) and the least in cow dung treatment. In rice bran treatment, copepodites showed higher production rate when compared to the other two feeds. Mean growth in terms of nauplii production was also higher in rice bran fed group followed by GOC fed group and the least in cow dung treatment.

scholarly journals Effect of growing media on mat type seedling raised for mechanical rice transplanting 

2018 ◽  
Vol 64 (No. 3) ◽  
pp. 157-167
Author(s):  
Hossen Anwar M ◽  
Hossain Mosharraf M ◽  
Haque Enamul M ◽  
Bell Richard W
Keyword(s):  
Rice Straw ◽  
Rice Bran ◽  
Sandy Loam ◽  
Organic Fertilizer ◽  
Poultry Litter ◽  
Cow Dung ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Rolling Quality

Mechanical transplanted seedling must meet the requirements of standard seedling block with uniform distribution of seedlings and inter-twisting roots for rolling. This study was conducted to identify the effect of growing media on mat type seedling raised for mechanical transplanting at Bangladesh Rice Research Institute (BRRI), Gazipur during the period of 2012–2014 covering two dry and cold seasons (Boro) and one wet season (Aman). Seedling were raised on plastic tray using sandy loam and clay loam soil mixed with decomposed cow-dung, mustard cake, rice straw organic fertilizer, rice bran, poultry litter and vermicompost at the rate of 0.0, 10, 20, 30 and 40%. Rolling quality of the seedling mat decreased and seedling height increased with the increased of mixing rate of organic fertilizer except rice bran and mustard cake. Averaged across three seasons, 10 to 30% cow-dung, rice straw organic fertilizer, vermicompost, 10% poultry litter and 20 to 30% rice bran with both types of soil was found suitable for seedling mat and seedling height. However, seedling varied among the organic fertilizers with both types of soil in the order of cow-dung > rice bran > vermicompost > poultry liter > rice straw organic fertilizer > mustard cake. Clay loam soil showed better performance on rolling quality over sandy loam soil.

scholarly journals Effects of artificial feeds on growth and production of fishes in Polyculture

2015 ◽  
Vol 4 (2) ◽  
pp. 11-15
Author(s):  
MA Hosen ◽  
M Shahjahan ◽  
MS Rahman ◽  
MJ Alam
Keyword(s):  
Rice Bran ◽  
Wheat Bran ◽  
Soybean Meal ◽  
Silver Carp ◽  
Artificial Feeding ◽  
Total Alkalinity ◽  
Cow Dung ◽  
Fish Production ◽  
Stocking Rate ◽  
Indian Major Carp

A study on the effects of artificial feeds on growth and production of fishes along with some limnological conditions were conducted in polyculture system. Species of Indian major carp (Cirrhinus mrigala) and exotic fishes (Hypophthalmicthys molitrix and Oreochromis niloticus) were stocked in six ponds under two treatments, each with three replications. Stocking rate in both treatments was 100 fish per decimal at the ratio of silver carp: tilapia: mrigal = 2: 2: 1. Fertilization and artificial feeds were given in Ttreatment 1 (T1) and only fertilization was done in Treatment 2 (T2). Wheat bran, rice bran and soybean meal were given daily as artificial feed in T1 in the ratio of wheat bran: rice bran: soybean meal = 2: 2: 1 (by wt). Urea, T.S.P and cow dung were applied fortnightly at the rate of 60 g deci-1, 90 g deci-1 and 2 kg deci-1 respectively. Water temperature, transparency, pH, dissolved oxygen, free CO2, total alkalinity, PO4-P and NO3-N were determined fortnightly and phytoplankton and zooplankton were studied fortnightly. These limnological conditions were more or less similar in the ponds under two treatments and were within suitable ranges. Calculated gross and net yields of fish were 16.56 and 12.48 ton ha-1 respectively in case of fertilization and artificial feeding application (T1) and 9.99 and 5.91 ton ha-1 respectively in case of only fertilization (T2). Application of artificial feed in T1 significantly increased the growth and production of fish more than two times which indicates that artificial feeding in polyculture is very useful for increasing fish production. DOI: http://dx.doi.org/10.3329/ijarit.v4i2.22637 Int. J. Agril. Res. Innov. & Tech. 4 (2): 11-15, December, 2014

scholarly journals Production of Bio-Fertilizer through Composting of Tannery Wastes with CowDung and Rice Bran

2021 ◽  
Vol 6 (1) ◽  
pp. 1-10
Author(s):  
Z. N. Lambu ◽  
◽  
U. Shamsuddeen ◽  
S. Yahaya ◽  
A. S. Aliyu ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Key Words ◽  
Electric Conductivity ◽  
Organic Compounds ◽  
Rice Bran ◽  
C:N Ratio ◽  
Cow Dung ◽  
Copper Zinc ◽  
Tannery Wastes ◽  
Total Concentrations

Tannery waste is made from nutrients and organic compounds that enhance soil fertility thereby improving plants and microbial growths. This study was designed to investigate the application of tannery wastes to form compost material in a mixture with cow-dung and rice brand. The treatments were prepared and tested for a period of sixty (60) days. The compost was characterized by electric conductivity (EC) of 10.11µs/cm, pH of 7.62 and Carbon-Nitrogen (C:N) ratio of 28.8. Total concentrations of Chromium, Lead, Cadmium, Copper, Zinc and Iron in mg/kg were 57.2, 0.92, 12.50, 60.50, 13.60 and 1101.00 respectively. However, total bacterial counts decreased from 8.2 x108 cfu/g to 1.8 x106 cfu/g after the 60days. The compost characteristics indicate about 80% germination index which may suggest the removal of most of the phototoxic compounds. Key words: Composting, Tannery wastes, bio-fertilizer

scholarly journals PRELIMINARY STUDY ON POPULATION DYNAMIC OF HARPACTICOID COPEPOD Euterpina acutifrons IN CULTURE CONDITION

2007 ◽  
Vol 2 (2) ◽  
pp. 133
Author(s):  
Philip Teguh Imanto ◽  
Gede Suwarthama Sumiarsa ◽  
Made Suastika
Keyword(s):  
Population Dynamic ◽  
Initial Density ◽  
Harpacticoid Copepod ◽  
Natural Food ◽  
Larval Rearing ◽  
Adult Copepod ◽  
Population Pattern ◽  
Group A ◽  
Group B ◽  
Euterpina Acutifrons

<p>The most important factor to high mortality rate in larval rearing is feeding success in early larval stage related to kind and size of natural live food. Copepod basically is the main source of natural food in the open ocean having some advantages such as smaller size of nauplii, attractive movement and high nutritional value. Observation on population dynamic of harpacticoid copepod <em>Euterpina acutifrons</em> was carried out using 5-L plastic bucket with initial density 100 ind./L. Green algae <em>Nannochloropsis</em> sp. was added to culture media at density of 50,000 cells/mL as a basic feed and additional feeds given were wheat flour (group A) and chicken liver (group B) at a rate of 50 mg/bucket. The result showed that there was no difference on population pattern in both groups where the incubation time took eight days to hatch, from nauplii to the copepodite stage was three days and from copepodite to adult copepod took five-to-six days. The differences came up from population number: in group (A) the highest number of copepod-bearing-egg was only 133 ind., nauplii production up to 62,833 ind. and number of copepodites was 22,333 ind. lower compared to group (B) with the highest copepod-egg was 308 ind., nauplii was 113,333 ind. and copepodite was 51,167 ind. The conclusion pointed out that the kind of food did not influence population pattern (quality) but gave effect to population growth.</p>

scholarly journals Kultur Masal Chidoridae

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Mezak Hematang ◽  
Sartje Lantu
Keyword(s):  
Water Quality ◽  
Fresh Water ◽  
Rice Bran ◽  
Mass Culture ◽  
Water Mass ◽  
Quality Parameters ◽  
Water Quality Parameters

The goal of mass culture of chydoridae is to find out the density of chydoridae that was cultured with yeast and rice bran.  Chydoridae was cultured on 5 aquaria i.e 3 aquaria measuring 100 x 60 x cm (A, B and C) and 2 aquaria measuring 30 x 30 x 30 cm (D and E).  Water quality parameters measured were temperature and pH.  The result of chydoridae mass culture for 21 days reached the peak on 14th day with the result as follow : for aquarium A with the concentration of yeast and rice bran 0.05 g/500 mL is 31 individue/ml; aquarium B with the concentration of yeast and rice bran 0.03 g/500 mL is 13 individue/ml; aquarium C with the concentration of yeast and rice bran 0.03 g/500 mL is 5 individue/ml; aquarium D with the concentration of yeast and rice bran 0.005 g/500 mL and aquarium E with the concentration of yeast and rice bran 0.003 g/500 mL can not be detected.  Counting the density of chydoridae on 21st day gave the result as follow : aquarium A as much as 4 individue/ml; aquarium B as much as 3 individue/ml; aquarium C as much as 2 individu/ml; aquarium D as much as 1 individue/ml and aquarium E as much as 2 individu/ml.  During culturing, water quality such as temperature and pH were on the range that was not harmful the chydoridae life.   Keywords: zooplankton, life food, chydoridae, fresh water, mass culture

Assessing the Effect of Co-composting Technique to Generate Quality Manure Out of Water Hyacinth (Eichhornia crassipes)

2017 ◽  
Vol 104 (4 - 6) ◽  
Author(s):  
Prithiv Raj V ◽  
◽  
Ilakiya T ◽  
Nivedha P ◽  
Shahaya Sharmila A ◽  
...  
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Crop Residues ◽  
Germination Percentage ◽  
Cow Dung ◽  
Aquatic Weed ◽  
Fungal Culture ◽  
Organic Substrates ◽  
Total N ◽  
Mean Values

An experiment was conducted during 2016-2017 to assess the efficacy of co-composting technique for generating quality manure out of the noxious aquatic weed, water hyacinth (Eichhornia crassipes). Locally available organic substrates viz., crop residues and cow dung were mixed with water hyacinth and co-inoculated with the fungal culture, Pleurotus djamor @ 0.05% and the earth worm, Eudrillus eugineae @ 0.2%. The treatment encompassing water hyacinth + crop residue + cow dung (1:1:1) along with P. djamor and E.eugineae showed higher mean values of total “N” (0.93%), “P” (1.00%), “K” (1.10%) content of manure, germination percentage (100 % each) and vigour index of 13.90 and 12.85, respectively for cluster bean and tomato ; whereas, water hyacinth + crop residues (1:1) without the bio-inoculants recorded higher mean total organic carbon of 40.85 %.

scholarly journals CRECIMIENTO Y SUPERVIVENCIA DE LARVAS DE ARGOPECTEN NUCLEUS ALIMENTADAS CON DIFERENTES DIETAS MICROALGALES

2016 ◽  
Vol 41 (1) ◽  
Author(s):  
Yenia Katerine Carreño Hernández ◽  
Ernesto Acosta Ortiz ◽  
Javier Gómez León
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Larval Growth ◽  
Isochrysis Galbana ◽  
Nutritional Composition ◽  
Mixed Diet ◽  
Tetraselmis Suecica ◽  
Chaetoceros Calcitrans

The influence of the diet on larval growth of the scallops Argopecten nucleus was studied, testing six microalgae diets composed by single-algae and mixed diets of the species Isochrysis galbana, Chaetoceros calcitrans y Tetraselmis suecica, handling a concentration per mL equivalent to 40000 cells of I. galbana and the response through the variables surviving, growth, appearance of the eye spot and state of condition (full, half-full and empty larvae) was measured. The diets containing I. galbana showed greater results over all the measured variables, with regard to those where it was not present. In particular, the mixed diet I. galbana + C. calcitrans presented superiority over all variables, although in the most cases was statistically similar to I. galbana + C. calcitrans + T. suecica, I. galbana + T. suecica and I. galbana alone. For the opposite, the diets with the lowest results were C. calcitrans and C. calcitrans + T. suecica. The results obtained are principally attributed to the nutritional composition mainly of high unsaturated fatty acids (HUFA) of each microalgae and each mixture supply, which is discussed in detail.

scholarly journals Pupuk Organik Padat dari Eceng Gondok, Kotoran Sapi, dan Dedak Padi dengan Effective Microorganisme 4 (EM4)

2021 ◽  
Vol 7 (1) ◽  
pp. 25-32
Author(s):  
Sri Widyastuti ◽  
Risa Suryananta Arfa
Keyword(s):  
Rice Bran ◽  
Water Hyacinth ◽  
Raw Materials ◽  
Organic Fertilizer ◽  
Soil Improvement ◽  
Quality Standard ◽  
Organic Fertilizers ◽  
Cow Dung ◽  
Technical Requirements ◽  
Materials Used

Water hyacinth (Eichonia crassipes) is one type of aquatic plant that has a fast growth rate. As a result, sunlight is blocked from entering the water, so that aquatic biota cannot carry out the photosynthesis process perfectly.  This study aims to determine the value of C/N ratio, levels of Phosphorus (P), Potassium (K), pH, and temperature (T) in composting for 16 days with the addition of 200 mL of bioactivator effective microorganism 4 (EM4) in each reactor. Variations of raw materials used are Control Reactor (RK) containing 1.5 kg of water hyacinth; Treatment Reactor 1 (R1) contains 0.5 kg of water hyacinth + 1 kg of cow dung; Treatment Reactor 2 (R2) contains 0.5 kg of water hyacinth + 1 kg of rice bran; and Treatment Reactor 3 (R3) contains 0.5 kg of water hyacinth + 1 kg of cow dung + 1 kg of rice bran. The results showed that the combination of raw materials had an effect on the quality of the organic fertilizer produced. The combination of Treatment 3 (R3) produced organic fertilizer with the best quality, namely C/N ratio = 15.30%, pH = 7.16, macronutrient P = 4.91% and K = 8.36% which met the quality standard requirements. Minister of Agriculture Number 261/KPTS/SR.310/M/4/2019 concerning the minimum technical requirements for organic fertilizers, biological fertilizers, and soil improvement.

scholarly journals Influence of Microalgae Diets on the Biological and Growth Parameters of Oithona nana (Copepoda: Cyclopoida)

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3544
Author(s):  
Jordan I. Huanacuni ◽  
Renzo Pepe-Victoriano ◽  
María C. Lora-Vilchis ◽  
Germán E. Merino ◽  
Fressia G. Torres-Taipe ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Growth Parameters ◽  
Ingestion Rate ◽  
Isochrysis Galbana ◽  
Population Level ◽  
Individual Growth ◽  
Mixed Diet ◽  
Final Population ◽  
Chaetoceros Calcitrans ◽  
Copepoda Cyclopoida

Several species of the planktonic free-living genus Oithona have been successfully used in the larviculture of marine fish and shrimp. However, few studies have been published that allow us to estimate the potential of Oithona nana culture under controlled conditions. This work evaluated the effect of the microalgae Isochrysis galbana and Chaetoceros calcitrans as single (200,000 cells/mL) and mixed diets (100,000 + 100,000 cells/mL) on population and individual growth, ingestion rate, number of spawnings, fertility, development time by stage, and sex ratio of O. nana. We cultured this copepod at 28 ± 0.5 °C, 35 PSU salinity, 125 lux, and 12:12 photoperiod. Results showed that diet had no effect on the final population level (6273–7966 ind/L) or on individual growth, nor on sex ratio, with less males than females. With C. calcitrans, O. nana had a higher filtration rate (57 ng C/ind/day). On the other hand, a mixed diet induced a higher number of spawns (0.4 events/day) and nauplii per spawn (23 ind). Similarly, a single or mixed diet, containing I. galbana, accelerated the development rate by 6.33–7.00 days. We concluded that O. nana can be cultured with both microalgae, indicating its potential use in an intensive system for production. However, more research is required to improve the productivity of O. nana rearing.

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