Mathematical modeling of the growth and development of the mussel Mytilus galloprovincialis on artificial substrates

Oceanology ◽  
2014 ◽  
Vol 54 (6) ◽  
pp. 763-770 ◽  
Author(s):  
E. F. Vasechkina ◽  
I. I. Kazankova
Keyword(s):  
Mathematical Modeling ◽  
Growth And Development ◽  
Mytilus Galloprovincialis ◽  
Artificial Substrates

scholarly journals Seasonal and bathymetric effects on macrofouling invertebrates’ primary succession in a mediterraenan non-indigenous species hotspot area

2018 ◽  
Vol 19 (3) ◽  
pp. 572 ◽  
Author(s):  
MARCO LEZZI ◽  
ADRIANA GIANGRANDE
Keyword(s):  
Community Development ◽  
Species Interactions ◽  
Primary Succession ◽  
Mytilus Galloprovincialis ◽  
Abundant Species ◽  
Artificial Substrates ◽  
Indigenous Species ◽  
Central Mediterranean ◽  
Almost All ◽  
Non Indigenous Species

The present study investigates macrofouling development in the Mar Grande of Taranto (Central Mediterranean Sea), a wide confined area that has attracted considerable attention in recent years due to the establishment of numerous non-indigenous species (NIS). Different starting times of a yearly primary succession on artificial substrates were tracked so as to investigate the matching of the development pattern with contingency and/or convergence models, identifying NIS’s structural role in the community endpoint. Our results show that during the experiment all assemblages tended to converge towards multiple contingent communities according to starting times and depths. The differences are due to propagule availability which influence further species interactions. Thus the endpoint patterns are defined by a contingent community development determined by the seasonal species pool, their phenologies, pre- and post-settlement events, and species interactions. The most important structuring species was Mytilus galloprovincialis, which was present in almost all the endpoint assemblages, in particular when it recruits at early stages of the community development. Another abundant species at the endpoint was the alien Branchiomma boholense; which was a persistent structural component contributing to an alternative state in which Mytilus galloprovincialis loses its structural importance and where B. boholense becomes dominant, leading to an increase in fouling biodiversity of the endpoint assemblage.

scholarly journals Analysis of the Dynamics of Marine Structures and Species with Criterial Mathematical Models

2021 ◽  
Vol 9 (12) ◽  
pp. 1431
Author(s):  
Aleksandr Zolotnitsky ◽  
Nataliy Sytnik ◽  
Sergei Chernyi ◽  
Natalya Logunova
Keyword(s):  
Mytilus Galloprovincialis ◽  
Average Length ◽  
Unit Length ◽  
Artificial Substrates ◽  
The Black Sea ◽  
Total Production ◽  
Relative Area ◽  
Marine Structures ◽  
Competition For Space ◽  
B Coefficients

The influence of the area of artificial substrates (collectors) on the biological parameters of populations of mussels (Mytilus galloprovincialis Lamarck) during their cultivation in the Black Sea has been investigated. For growing mollusks, four types of collectors were used, with different relative areas (ω), i.e., with different ratios of the substrate area (S) per unit length of the collector (L), which were 0.09, 0.21, 0.34, and 0.55. It was found that, during a 1.5-year cultivation, the density (N, ind./m) and biomass (B, kg/m) change and reach a certain stationary state, determined by the relative area of the substrate. It was shown that, on collectors with a higher value of ω, there was a decrease in the average length (L, mm) and weight (W, g) of the mollusk yield. The Boysen–Jensen method was used to calculate the total production of mollusks (P), elimination (E), and specific production (P/B coefficient) for each type of reservoir, and it was shown that P increased with an increase in the substrate area, while E and P/B coefficients decreased. Based on the analysis of the obtained results, it was concluded that during the cultivation of mussels these parameters are regulated by density-dependent population factors (intraspecific competition) for space (substrate) and food.

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.

An ultrastructural study of vegetative incompatibility in plants

1978 ◽  
Vol 36 (2) ◽  
pp. 436-437
Author(s):  
Randy Moore
Keyword(s):  
Ultrastructural Study ◽  
Cell Walls ◽  
Growth And Development ◽  
Solanum Pennellii ◽  
Initial Product ◽  
Basic Aspect ◽  
Tissue Interactions ◽  
Graft Interface ◽  
Antigen Antibody ◽  
Standard Fixation

Cell and tissue interactions are a basic aspect of eukaryotic growth and development. While cell-to-cell interactions involving recognition and incompatibility have been studied extensively in animals, there is no known antigen-antibody reaction in plants and the recognition mechanisms operating in plant grafts have been virtually neglected.An ultrastructural study of the Sedum telephoides/Solanum pennellii graft was undertaken to define possible mechanisms of plant graft incompatibility. Grafts were surgically dissected from greenhouse grown plants at various times over 1-4 weeks and prepared for EM employing variations in the standard fixation and embedding procedure. Stock and scion adhere within 6 days after grafting. Following progressive cell senescence in both Sedum and Solanum, the graft interface appears as a band of 8-11 crushed cells after 2 weeks (Fig. 1, I). Trapped between the buckled cell walls are densely staining cytoplasmic remnants and residual starch grains, an initial product of wound reactions in plants.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

SEM study of the morphological effects of kinetin and zeatin on the growth and development of the apical meristem in wheat

1995 ◽  
Vol 53 ◽  
pp. 978-979
Author(s):  
G. M. Hutchins ◽  
J. S. Gardner
Keyword(s):  
Growth And Development ◽  
Furfuryl Alcohol ◽  
Apical Meristem ◽  
Plant Cells ◽  
Triticum Aestivum L ◽  
Morphological Development ◽  
Naturally Occurring ◽  
Chinese Spring Wheat ◽  
Sem Study ◽  
Moist Environment

Cytokinins are plant hormones that play a large and incompletely understood role in the life-cycle of plants. The goal of this study was to determine what roles cytokinins play in the morphological development of wheat. To achieve any real success in altering the development and growth of wheat, the cytokinins must be applied directly to the apical meristem, or spike of the plant. It is in this region that the plant cells are actively undergoing mitosis. Kinetin and Zeatin were the two cytokinins chosen for this experiment. Kinetin is an artificial hormone that was originally extracted from old or heated DNA. Kinetin is easily made from the reaction of adenine and furfuryl alcohol. Zeatin is a naturally occurring hormone found in corn, wheat, and many other plants.Chinese Spring Wheat (Triticum aestivum L.) was used for this experiment. Prior to planting, the seeds were germinated in a moist environment for 72 hours.

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