scholarly journals Isolation, culture and evaluation of Chaetoceros muelleri from the Caribbean as food for the native scallops, Argopecten nucleus and Nodipecten nodosus

2017 ◽  
Vol 44 (3) ◽  
pp. 557-568
Author(s):  
Luz Adriana Velasco ◽  
Silvia Carrera ◽  
Judith Barros
Keyword(s):  
Culture Media ◽  
Organic Fertilizer ◽  
Ammonia Excretion ◽  
Local Strain ◽  
Organic Content ◽  
Chaetoceros Muelleri ◽  
Scope For Growth ◽  
Physiological Variables ◽  
The Caribbean ◽  
Nodipecten Nodosus

The potential of the Caribbean strain Chaetoceros muelleri (CHA-C-04) to be produced and used as diet of two commercially important native scallops (Argopecten nucleus and Nodipecten nodosus) was assessed, using the non-indigenous Chaetoceros calcitrans strain, as a control. Growth and biomass of both diatoms were compared under different culture environments (indoor and outdoor) and culture media (F/2, organic fertilizer triple 15 and humus extract). In addition, their bromatological composition and effect on the physiological condition of the scallops fed with both diatoms were compared. The growth and biomass production of C. muelleri and C. calcitrans were higher under indoor conditions and using the F/2 media. Although the content of proteins, lipids and energy was higher in C. muelleri than in C. calcitrans, its size, organic content, growth and biomass values were not different. Scallops fed with both diatoms strains shows similar values for all of the physiological variables measured, including rates of absorption, oxygen consumption, ammonia excretion and scope for growth. Results suggest that the local strain C. muelleri can be successfully produced and used in the diet of A. nucleus and N. nodosus, but do not offer productive advantages.

scholarly journals Effect of pluronic block polymers and N-acetylcysteine culture media additives on growth rate and fatty acid composition of six marine microalgae species

2021 ◽  
Vol 105 (5) ◽  
pp. 2139-2156
Author(s):  
Justine Sauvage ◽  
Gary H. Wikfors ◽  
Xiaoxu Li ◽  
Mark Gluis ◽  
Nancy Nevejan ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Culture Media ◽  
Fatty Acid Content ◽  
Pluronic F127 ◽  
Algal Culture ◽  
Omega 3 ◽  
Chaetoceros Muelleri ◽  
Omega 3 Fatty Acid ◽  
Live Feed ◽  
Chaetoceros Calcitrans

Abstract The efficiency of microalgal biomass production is a determining factor for the economic competitiveness of microalgae-based industries. N-acetylcysteine (NAC) and pluronic block polymers are two compounds of interest as novel culture media constituents because of their respective protective properties against oxidative stress and shear-stress-induced cell damage. Here we quantify the effect of NAC and two pluronic (F127 and F68) culture media additives upon the culture productivity of six marine microalgal species of relevance to the aquaculture industry (four diatoms-Chaetoceros calcitrans, Chaetoceros muelleri, Skeletonema costatum, and Thalassiosira pseudonana; two haptophytes-Tisochrysis lutea and Pavlova salina). Algal culture performance in response to the addition of NAC and pluronic, singly or combined, is dosage- and species-dependent. Combined NAC and pluronic F127 algal culture media additives resulted in specific growth rate increases of 38%, 16%, and 24% for C. calcitrans, C. muelleri, and P. salina, respectively. Enhanced culture productivity for strains belonging to the genus Chaetoceros was paired with an ~27% increase in stationary-phase cell density. For some of the species examined, culture media enrichments with NAC and pluronic resulted in increased omega-3-fatty acid content of the algal biomass. Larval development (i.e., growth and survival) of the Pacific oyster (Crassostrea gigas) was not changed when fed a mixture of microalgae grown in NAC- and F127-supplemented culture medium. Based upon these results, we propose that culture media enrichment with NAC and pluronic F127 is an effective and easily adopted approach to increase algal productivity and enhance the nutritional quality of marine microalgal strains commonly cultured for live-feed applications in aquaculture. Key points • Single and combined NAC and pluronic F127 culture media supplementation significantly enhanced the productivity of Chaetoceros calcitrans and Chaetoceros muelleri cultures. • Culture media enrichments with NAC and F127 can increase omega-3-fatty acid content of algal biomass. • Microalgae grown in NAC- and pluronic F127-supplemented culture media are suitable for live-feed applications.

scholarly journals PEMBUATAN PUPUK ORGANIK DARI KOTORAN SAPI DAN JERAMI PADI DENGAN PROSES FERMENTASI MENGGUNAKAN BIOAKTIVATOR M-DEC

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Ahmad Shobib
Keyword(s):  
Rice Straw ◽  
Fermentation Process ◽  
Raw Materials ◽  
Organic Fertilizer ◽  
Organic Matter Content ◽  
Organic Content ◽  
Matter Content ◽  
Cow Manure ◽  
Aerobic Fermentation ◽  
Fermentation Time

Cow manure can be used for making organic fertilizer because it contains nutrients such as Nitrogen (N), Phosphorus (P), and Potassium (K). Rice straw has a high C-Organic content. Adding straw compost will increase soil organic matter content. The study aims to determine the fermentation process that occurs so as to produce organic fertilize, know the effect of fermentation time and the effect of the composition of raw materials for cow manure and rice straw on the process of making organic fertilizer to the content of organic fertilizer according to SNI 7603 : 2018. The method use by aerobic fermentation is by mixing cow manure and rice straw and M-Dec bioactivators by comparison 3 : 1, 2 : 2,1 : 3 and fermentation time 7, 14, 21, 28 days. The parameters tested are C-organic, Nitrogen (N), C/N ratio, Phosphorus (P), and Potassium (K). The best quality organic fertilizer in the treatment of cow manure : rice straw with a ratio of 2 : 2 on the 28th day fermentation process namely C-organic content 34,63 %, C/N ratio is 25, macro nutrient content N+P2O5+K2O of 3,14 % that has met SNI 7763 : 2018. Keyword: M-Dec bioactivator, aerobic fermentation, cow manure, rice straw, C/N ratio

scholarly journals IDENTIFIKASI BAKTERI DARI PUPUK ORGANIK CAIR ISI RUMEN SAPI

EKOLOGIA ◽  
2020 ◽  
Vol 18 (2) ◽  
pp. 63-71
Author(s):  
Sri Suci Damayanti ◽  
Oom Komala ◽  
E. Mulyati Effendi
Keyword(s):  
Waste Treatment ◽  
Organic Fertilizer ◽  
Organic Content ◽  
Rumen Bacteria ◽  
Genus Bacillus ◽  
Treatment Technology ◽  
Bovine Rumen ◽  
Gram Staining ◽  
Genus Lactobacillus ◽  
Biochemical Testing

Waste treatment technology is not less important for the business of Slaughterhouse (RPH). Various businesses and technologies have been done to handle this waste problem, especially for the rumen waste in RPH. One of them is utilizing the waste as an organic fertilizer. Bovine rumen bacteria are bacteria that originate from the contents of bovine rumen, with simple and inexpensive development techniques. This bacterium helps farmers in improving and developing an insightful agriculture on the preservation of soil fertility and natural resources. The study aims to identify bacteria and find out the diversity, properties, and characteristics of bacteria from the liquid organic content of rumen cows. Methods undertaken by observing colony morphology, colony selection and purification, Gram staining, spores staining, and biochemical testing. Of the four isolates identified there are two bacterial genus, three isolates RS1a, RS2a, RS2b including the genus Bacillus sp. aerobic and an isolates of RS1b including the genus Lactobacillus sp. the facultative of anaerobic. The four isolates of bacteria are able to grow optimum at pH 6.5 and the temperature of 370C is homofermentative.

scholarly journals Evaluation of Culture Media Limited in Nitrogen and Silicates on the Production Response and Lipid Content of the Diatom Chaetoceros muelleri

2014 ◽  
Vol 6 (4) ◽  
pp. 145-149 ◽  
Author(s):  
Lopez-Elias Jose Antonio ◽  
Carvallo Ruiz Maria Gisela ◽  
Estrada Raygoza Leticia Areli ◽  
Martinez Cordova Luis Rafael ◽  
Martinez-Porchas Marcel ◽  
...  
Keyword(s):  
Lipid Content ◽  
Culture Media ◽  
Chaetoceros Muelleri ◽  
Production Response

scholarly journals Spirulina Culture in Bangladesh XI: Selection of a Culture Medium, Suitable for Culturing a Local Strain of Spirulina

1970 ◽  
Vol 41 (3) ◽  
pp. 227-234
Author(s):  
R Khatun ◽  
P Noor ◽  
N Akhter ◽  
MAA Jahan ◽  
M Hossain ◽  
...  
Keyword(s):  
Spirulina Platensis ◽  
Climatic Condition ◽  
Large Scale ◽  
Culture Medium ◽  
Culture Media ◽  
Local Strain ◽  
Condition Effect ◽  
Selection Of

Large scale Spirulina culture is possible in Bangladesh inspite of unpredictable climatic condition. Effect of different culture media on the growth of a local strain of Spirulina (Spirulina platensis) was studied. Bangladesh medium (Bd1) was found to be more favourable for the growth of the alga. All together three culture media were included in this study. Bangladesh J. Sci. Ind. Res. 41(3-4), 227-234, 2006

Scope for growth versus actual growth in the juvenile predatory gastropod Chorus giganteus

2006 ◽  
Vol 86 (6) ◽  
pp. 1423-1428 ◽  
Author(s):  
J.M. Navarro ◽  
G.X. Urrutia ◽  
C. Carrasco
Keyword(s):  
Ingestion Rate ◽  
High Sensitivity ◽  
Point Of View ◽  
The Body ◽  
Experimental Conditions ◽  
Pronounced Increase ◽  
Continuous Increase ◽  
Scope For Growth ◽  
Physiological Variables ◽  
Actual Growth

The scope for growth (SFG) calculated on measurements of physiological variables in juvenile of the predatory gastropod Chorus giganteus was compared with the actual growth under an energetic point of view. The continuous increase in the amount of food ingested and absorbed by C. giganteus was clearly related to the body size of the snails. The pronounced increase in the metabolic processes of respiration and excretion at the end of the study was related with the high rates of growth experienced by the snails under the experimental conditions. These results were supported by the correlation analysis where ingestion rate (r=0.99), oxygen consumption (r=0.88) and excretion rate (r=0.89) were significantly correlated with the actual growth (P≤0.05). Comparing the estimated growth curve (SFG) with that directly measured on juvenile individuals of C. giganteus, a high similarity in results was observed. The high sensitivity of the scope for growth argues for the use of this index as an adequate tool for estimating the growth of juvenile gastropod molluscs without interference from reproductive processes such as gametogenesis and spawning which may produce corresponding rises and falls in the biomass of individuals. Scope for growth is thus validated as a reliable measurement of the physiological/energetic condition of the organism, representing an effective index for indirect estimation of the growth of a species.

Effects of subsoiling and associated incorporation of fertilizer on soil rehabilitation after opencast mining for coal

1991 ◽  
Vol 116 (2) ◽  
pp. 265-273 ◽  
Author(s):  
J. Scullion ◽  
A. R. A. Mohammed
Keyword(s):  
Soil Structure ◽  
Pore Space ◽  
Organic Fertilizer ◽  
Organic Content ◽  
Lumbricus Rubellus ◽  
Opencast Mining ◽  
Population Densities ◽  
Surface Wetness ◽  
Soil Rehabilitation ◽  
Earthworm Population

SUMMARYA trial was set up in South Wales in 1980 on land replaced in 1972 after opencast coal mining, to assess the effects on soil rehabilitation of regular subsoiling, through an established sward, with and without incorporation of a ‘semi-organic’ fertilizer into subsoiling slots. Treatments were assessed on the basis of yield, soil structure indices, root and organic contents and earthworm population densities. Apart from yields, data are for the eighth year of the experiment (1987), 18 months after the fourth programme of treatments.Treatments did not markedly affect productivity, although it tended to be higher with subsoiling and fertilizer incorporation. Subsoiling had little effect on root and organic content, but fertilizer incorporation increased the latter, particularly at depth. Earthworm population densities were markedly higher on subsoiled areas, the increase in the deeper burrowing species Aporrectodea caliginosa being largest. Fertilizer incorporation increased abundance of Lumbricus rubellus, but had little effect on other species. Subsoiling reduced surface wetness, but did not result in any significant improvement in structure. Fertilizer incorporation reduced clay dispersion at depth and, with subsoiling, also increased pore space.Treatment responses in term of soil structure were not large, but the incorporation of fertilizer did markedly accelerate structure rehabilitation at depth. Subsoiling alone contributed to land rehabilitation by controlling surface wetness and encouraging an increase in earthworm populations.

scholarly journals Composted Rice Husk Improves the Growth and Biochemical Parameters of Sunflower Plants

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Rabia Badar ◽  
Shamim A. Qureshi
Keyword(s):  
Rice Husk ◽  
Biochemical Parameters ◽  
Crude Protein ◽  
Phosphorus Content ◽  
Organic Fertilizer ◽  
Organic Content ◽  
Nitrogen And Phosphorus ◽  
Total Carbohydrate ◽  
Rhizobium Sp ◽  
Microbial Treatments

The present study investigated the effects of composted rice husk (5 and 26; 10 g/2 kg of soil/pot) on growth and biochemical parameters of sunflower plants at the 30th and 60th day of germination. Result showed significant improvement in growth and biochemical parameters of plants as compared to control plants treated with uncomposted organic fertilizer. However, the effects vary with the microbial treatments involved in the composting of rice husk like composted with T. hamatum (JUF1), bradyrhizobium sp-II (JUR2) alone, and JUF1 in combination with Rhizobium sp-I (JUR1) were found effective in improving the shoot and root lengths, total chlorophyll, carbohydrate, crude protein, and mineral (nitrogen and phosphorus) content of sunflower plants. It indicates that composted rice husk with improved total carbohydrate and protein contents may increase the soil fertility by improving its organic content.

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