scholarly journals Influence of mineral and organic artificial substrates on productivity of covered ground tomato under additional lighting

2022 ◽  
Vol 42 ◽  
pp. 02010
Author(s):  
P. M. Isaeva ◽  
L. Sh. Daulakova ◽  
N. L. Adaev ◽  
A. G. Amaeva ◽  
Zh. Kh. Aiskhanova
Keyword(s):  
Artificial Substrate ◽  
Artificial Substrates ◽  
Daily Growth ◽  
Tomato Plants

The article presents the results of studying the reaction of tomato plants to an artificial substrate on which they are grown with all other things being equal — lighting, nutrition, temperature, and etc. Among the studied parameters, the plants reacted to the greatest extent with an average daily growth, filling of fruits, which mainly influenced the yield of tomatoes.

scholarly journals Colonization of benthic invertebrates on artificial and natural substrate in a Neotropical lotic environment in Southern Brazil

2019 ◽  
Vol 41 ◽  
pp. e45872 ◽  
Author(s):  
Nilce Svarcz Jungles de Camargo ◽  
Atsler Luana Lehun ◽  
Jonathan Rosa ◽  
Ana Carolina de Deus Bueno-Krawczyk
Keyword(s):  
Benthic Invertebrates ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Natural Substrate ◽  
Tropical Stream ◽  
Taxonomic Level ◽  
Lotic Environment ◽  
Significant Difference ◽  
Colonization Process ◽  
South Brazil

The objective of this research was to validate the colonization process on natural and artificial substrates by benthic invertebrates in a tropical stream in South Brazil. The samples were performed in July and August-2012, and 32 samplers were used, being 16 natural and 16 artificial substrates. In each sample, two replicas were taken for each substrate at the 2th, 4th, 7th, 14th, 21th 28th, 35th and 42th days of colonization. The organisms were identified to the lowest possible taxonomic level. In both substrates 3,070 benthic invertebrates were detected, of which 1,753 individuals were collected on the natural substrate, and 1,317 on the artificial substrate. From the identified taxa 8.5% were not dominant (Anacroneuria, Orthocladiinae, Tupiara, Smicridea, Baetodes, Tupiperla, Macrogynoplax, Gripopteryx, Cylloepus, Macrelmis, Microcylloepus, Hetaerina, Argia, Coryphaeschna, Atopsyche, Pomacea, Corydalus, Leptohyphes and Eccoptura), and 31.5% were dominant (Tanypodinae, Chironominae, and Paragripopteryx). The genus Simulium was very common, dominant and abundant, representing 65% of the collected individuals. No significant difference was found in the abundance and species composition between artificial and natural substrates. On the natural substrate, the higher colonization index was at the 35th day with 459 individuals, and the lowest was at the 14th day, with 87. On the artificial substrate the highest index was at the 42th day with 337 individuals, and the lowest was at the 4th day, with 85. Both natural and artificial substrates are efficient in characterizing the benthic community. In the evaluation of the ecological succession, it was not possible to observe a pattern that described the process, since the composition was nearly constant throughout the study period.

scholarly journals Periphyton biomass on artificial substrates during the summer and winter

2015 ◽  
Vol 45 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Altevir Signor ◽  
Arcangelo Augusto Signor ◽  
Wilson Rogério Boscolo ◽  
Adilson Reidel ◽  
Sidnei Klein ◽  
...  
Keyword(s):  
Water Column ◽  
Biomass Production ◽  
Low Cost ◽  
Biomass Productivity ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Live Food ◽  
Significant Variability ◽  
Periphyton Biomass ◽  
Black Plastic

This study evaluated the periphyton production on artificial substrates considering it as a source of low cost live food for fish. Blades of artificial substrates such as wood, black plastic, acrylic, fiberglass, ceramics and glass (all with 144cm2 blades, 24 for each substrate) were submerged 20.0cm below the water column for 35 days in the winter and 42 days in the summer. The blades were randomly installed in 200m3 pond and evaluated for the biomass production at different phases during the summer and winter. Four blades of each substrate were collected weekly, and the periphytic community was carefully scraped with a spatula and fixed in 4% formaldehyde. The periphytic biomass productivity was evaluated by artificial substrate area and per day. The results evidenced the characteristic periodicity in periphyton biomass production and a significant variability in the collect period and season in the different artificial substrates used. Ceramic and wood showed the best results in the summer while wood showed the best results in the winter. The priphyton biomass productions differ among periods, substrates and seasons. Wood and ceramics could be indicated for periphyton biomass production in either winter or summer.

Structure and succession of periphyton in an urban reservoir: artificial substrate specificity

2017 ◽  
Vol 46 (4) ◽  
Author(s):  
Ivana Trbojević ◽  
Jelena Jovanović ◽  
Dušan Kostić ◽  
Slađana Popović ◽  
Jelena Krizmanić ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Environmental Changes ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Ecological Groups ◽  
Periphyton Community ◽  
Algae Growth ◽  
Colonization Process ◽  
The Relationship ◽  
Insight Into

AbstractSubstrate specificity of the periphyton community is usually underestimated in both periphyton ecology and biomonitoring studies, thus different kinds of both natural and artificial substrates (of organic and inorganic origin) are employed. Periphyton colonization and successional trajectories are particularly debatable processes when different kinds of substrates are considered. In our field experiment, we deployed four kinds of artificial substrates (two inorganic ones – glass and ceramic, and two organic ones – willow and yew wooden tiles) for the development of periphyton in an urban reservoir referred to as Lake Savsko (Belgrade, Serbia). We comparatively investigated the structure, colonization process, diversity and successional trajectories of periphyton. We also assessed the relationship between the dynamics of algae growth forms (ecological groups) on different substrates and selected abiotic limnological factors. Our objective was to determine whether the type of substrate affects periphyton characteristics at various levels and whether an artificial substrate potentially affects the bioindication capacity of ecological groups. We concluded that all substrates behave similarly at the level of structure and colonization phases, but when considering diversity and successional trajectories, the substrate specificity was demonstrated. Our results suggest that communities developed on inert substrates (glass and ceramic) could provide more realistic insight into complex environmental changes.

ON SOME QUANTITATIVE REGULARITIES IN THE FORMATION OF MUSSEL (MYTILUS GALLOPROVINCIALIS, LAM.) HARVEST ON VARIOUS TYPES OF ARTIFICIAL SUBSTRATES

Fisheries ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 83-87
Author(s):  
Aleksandr Zolotnitskiy ◽  
Efim Kozhurin ◽  
Natalya Sytnik
Keyword(s):  
Power Function ◽  
Intraspecific Competition ◽  
Mytilus Galloprovincialis ◽  
Dynamic Equilibrium ◽  
Logistic Equation ◽  
The State ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Life Space ◽  
Ecological Capacity

Quantitative regularities in the formation of mussel harvest (B) on various types of artificial substrates are investigated for four substrates, varying by the collector area (S) per 1 linear meter: 0,09, 0,21, 0,34 and 0,55 sq. m. The results of mollusk cultivation on the collectors with various artificial substrate areas have shown that the dynamics of biomass (B) depends on the time of cultivation (t) and can be described by a logistic equation: Bt = B st/(1 - eb-kt). A relation between a harvest and a collector area has been identified, and this relation is approximated by a power function: B = 2,62 S1,25. It is shown that the harvest formation is mediated through the intraspecific competition for artificial substrate (life space), which is fulfilled through self-thinning; as a result, the population ends up in the state of dynamic equilibrium that corresponds to “ecological capacity” of a collector.

scholarly journals Use of artificial substrate in pond culture of freshwater prawn (Macrobrachium rosenbergii): a new approach regarding growth performance and economic return

2014 ◽  
Vol 2 (1) ◽  
pp. 53 ◽  
Author(s):  
Dilshad Milky Tuly ◽  
Md. Sherazul Islam ◽  
Mst. Hasnahena ◽  
Md. Rezwanul Hasan ◽  
Md. Tawhid Hasan
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Quality Parameters ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Freshwater Prawn ◽  
Total Production ◽  
Growth And Survival ◽  
Significant Difference ◽  
Net Profit ◽  
T1 And T2

An experiment was conducted for six months to evaluate the effects of artificial substrates on the survival, growth and production of Macrobrachium rosenbergii juveniles. The treatment T1 contained locally available bamboo-made substrate both vertical and horizontal and treatment T2 received no substrate. Juvenile prawns (0.40±0.13 g) were stocked at the rate of 19,760 prawns ha-1. The water quality parameters range such as temperature, pH and DO were 22.06-33.45°C, 7.70-8.40 and 4.75-6.15 mgl-1 respectively which was no significant difference (P<0.05) between two treatments. The final weight was 56.48±6.56 g and 45.03±2.11 g in T1 and T2 respectively. The survival rate of T1 was 63.12% which was significantly higher (P>0.05) than T2 (56.87%). The specific growth rate, food conversion ratio and protein efficiency ratio were 1.19 % and  1.14 %, 3.15 and 4.39, 0.98 and 0.71 in T1 and T2 respectively which were not significantly different (P<0.05) between treatments. The total production and net profit in T1 was 1408 kgha-1 and BDT 117,325 ha-1 which was significantly higher (P>0.05) than T2. Thus growth and survival of prawn juveniles improved in presence of artificial substrate which could be economically viable technique for the freshwater prawn culture.

Effects of artificial substrates on the growth and immunology of postlarvae of Marsupenaeus japonicus (Spence Bate, 1888) (Decapoda: Dendrobranchiata: Penaeidae) reared in biofloc

2021 ◽  
Vol 41 (3) ◽  
Author(s):  
Su-Kyoung Kim ◽  
In-Kwon Jang ◽  
Seok Ryel Kim ◽  
Jea Chun Jeon ◽  
Su Kyoung Kim
Keyword(s):  
Serine Proteinase ◽  
Innate Immune ◽  
Artificial Substrate ◽  
Artificial Substrates ◽  
Marsupenaeus Japonicus ◽  
Nursery Culture ◽  
Reverse Transcription Pcr ◽  
Immune Related Genes ◽  
And Control ◽  
Positive Effect

Abstract We investigated the effects of biofloc and artificial substrates (net and brush) on the growth and immunology of the postlarvae of Marsupenaeus japonicus (Spence Bate, 1888) reared for 30 days. The mRNA expressions of innate immune-related genes (prophenoloxidase, masquerade-like serine proteinase, and lysozyme) in the postlarvae were analyzed using quantitative reverse transcription PCR (qRT-PCR). The highest specific growth rate of larvae (3.66 ± 0.02% d–1, 3.75 ± 0.02% d–1) were shown in the net and control groups. The highest survival rate (90 ± 7.1%) was observed in the brush group (P &lt; 0.05). The net yield was significantly higher in the artificial substrate groups (brush 36.60 ± 6.19 g m–2, net 36.46 ± 2.36 g m–2) than in the control (33.79 ± 0.16 g m–2) (P &lt; 0.05). Total suspended, volatile suspended, and suspended solids were significantly lower in the brush group than in the other groups. The immune-related genes showed significantly higher expressions in the artificial substrate groups than in the control. These results support the benefits of artificial substrate in M. japonicus nursery culture to mitigate space competition and suppress cannibalism, with a positive effect on survival. The additional surface area provided by the biofloc, which the larvae can graze on, enhanced the expression of immune-related genes in individuals.

Improvement of an artificial test substrate technique for evaluation of em immunocytochemical labeling

1987 ◽  
Vol 45 ◽  
pp. 762-763
Author(s):  
G. D. Gagne ◽  
M. F. Miller
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Artificial Substrate ◽  
Chemical Fixation ◽  
As If

We recently described an artificial substrate system which could be used to optimize labeling parameters in EM immunocytochemistry (ICC). The system utilizes blocks of glutaraldehyde polymerized bovine serum albumin (BSA) into which an antigen is incorporated by a soaking procedure. The resulting antigen impregnated blocks can then be fixed and embedded as if they are pieces of tissue and the effects of fixation, embedding and other parameters on the ability of incorporated antigen to be immunocyto-chemically labeled can then be assessed. In developing this system further, we discovered that the BSA substrate can also be dried and then sectioned for immunolabeling with or without prior chemical fixation and without exposing the antigen to embedding reagents. The effects of fixation and embedding protocols can thus be evaluated separately.

The Preparation of an Artificial Reagent for the One-Stage Factor VIII Assay

1970 ◽  
Vol 23 (02) ◽  
pp. 306-312 ◽  
Author(s):  
D Nyman
Keyword(s):  
Factor Viii ◽  
Artificial Substrate ◽  
One Stage ◽  
The One

SummaryA method for preparation of an artificial substrate for the one-stage factor VIII assay is described. Standardization of the test is given. The method is specific and reproducible.

TOWARDS THE QUESTION OF SPECIALIZED FEEDS FOR TENCHES (TINCA TINCA)

2017 ◽  
pp. 89-97
Author(s):  
Elena Mikhaylovna Chervonenko ◽  
Lina Yurievna Lagutkina
Keyword(s):  
Growth Rate ◽  
Fish Growth ◽  
Animal Origin ◽  
State Technical ◽  
Tinca Tinca ◽  
Daily Growth ◽  
Volga River ◽  
The Moment ◽  
First Time ◽  
Technical Centre

The article describes the process of tench growing (male and female species removed from set gear in the Volga river in the Astrakhan region) using experimental feedstuff "T", taking into account the fact that problems with artificial growing tench ( Тinca tinca ) appear first in the process of feeding when wild sires change to artificial food. The research took place on the base of the department of aquaculture and water bioresources of Astrakhan State Technical University in innovation centre "Bioaquapark - scientific and technical centre of aquaculture" in 2015. Special feed including components of animal origin - mosquito grab and sludge worm as an effective substitute to fish flour, as well as components of vegetable origin (carrot, parsley, pumpkin, wheatgrass) for domestication of tenches are offered for the first time. Food technology has been described. The exact composition of the formula, which is being licensed at the moment, is not disclosed. Feed "T", which has undergone biological analysis and is in accordance with organoleptic and physical standards was used for feeding tench female and male species during domestication period (60 days), along with food "Coppens" (Holland). Feed efficiency was determined according to survival and daily fish growth. Growth rate of females appeared more intensive than growth rate of males fed with experimental food "T". Daily growth changed depending on the types of food: from 0.3 ("Coppens") to 0.47 (experimental food) in females, from 0.25 ("Coppens") to 0.39 (experimental food) with males. Ability to survive among tench species fed with "Coppens" and experimental food made 60% and 100%, correspondingly. Nutricion of tench species with experimental food encouraged their domestication, which allowed using tench species in further fish breeding process in order to get offspring. The project was supported by the Innovation Promotion Fund in terms of the project "Development and implementation of the technique for the steady development of aquaculture: food "TechSA".

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