Seasonal fluctuations of growth rate and chemical composition of Gracilaria cf. conferta in outdoor culture in Israel

Hydrobiologia ◽  
1987 ◽  
Vol 151-152 (1) ◽  
pp. 501-507 ◽  
Author(s):  
M. Friedlander ◽  
R. Shalev ◽  
T. Ganor ◽  
S. Strimling ◽  
A. Ben-Amotz ◽  
...  
Keyword(s):  
Growth Rate ◽  
Chemical Composition ◽  
Seasonal Fluctuations ◽  
Outdoor Culture

Thermal Parameters, Microstructure and Porosity During Transient Solidification of Ternary Al–Cu–Si Alloys

2012 ◽  
Vol 730-732 ◽  
pp. 883-888 ◽  
Author(s):  
Daniel J. Moutinho ◽  
Laércio G. Gomes ◽  
Otávio L. Rocha ◽  
Ivaldo L. Ferreira ◽  
Amauri Garcia
Keyword(s):  
Growth Rate ◽  
Chemical Composition ◽  
Cooling Rate ◽  
Tip Growth ◽  
Thermal Parameters ◽  
Volumetric Fraction ◽  
Dendritic Network ◽  
Intermetallic Particles ◽  
Casting Length

Solidification of ternary Al-Cu-Si alloys begins with the development of a complex dendritic network typified by primary (λ1) and secondary (λ2) dendrite arm spacings which depend on the chemical composition of the alloy and on the casting thermal parameters such as the growth rate and the cooling rate. These thermal parameters control the scale of dendritic arms, the size and distribution of porosity and intermetallic particles in the casting. In this paper, λ1and λ2were correlated with experimental thermal parameters i.e., the tip growth rate and the tip cooling rate. The porosity profile along the casting length has also been experimentally determined. The volumetric fraction of pores increase with the increase in alloying Si and with the increase in Fe concentration at the regions close to the casting cooled surface.

The effects of feeding frequencies on seasonal changes in growth rate and chemical composition of farmed cod (Gadus morhua)

2006 ◽  
Vol 12 (2) ◽  
pp. 157-163 ◽  
Author(s):  
C. SOLBERG ◽  
L. WILLUMSEN ◽  
S. AMBLE ◽  
T. JOHANESSEN ◽  
H. SVEIER
Keyword(s):  
Growth Rate ◽  
Chemical Composition ◽  
Seasonal Changes ◽  
Gadus Morhua

Morphological and chemical alterations inBotrytis cinereaexposed to the dicarboximide fungicide vinclozolin

1997 ◽  
Vol 43 (6) ◽  
pp. 552-560 ◽  
Author(s):  
Silvia M. J. C. S. Cabral ◽  
João P. S. Cabral
Keyword(s):  
Growth Rate ◽  
Chemical Composition ◽  
Botrytis Cinerea ◽  
Germ Tube ◽  
Membrane Damage ◽  
Hyphal Growth ◽  
Lower Content ◽  
Cell Debris ◽  
Biochemical Alterations ◽  
Severe Reduction

Treatment of actively growing Botrytis cinerea hyphae with micromolar concentrations of the dicarboximide fungicide vinclozolin resulted in significant alterations in the growth rate, morphology, and chemical composition of the cells. The addition of vinclozolin resulted in an immediate and severe reduction in the hyphal growth rate and a retardation in the emergence of the second germ tube. Cells treated with vinclozolin had a lower content of pool metabolites than control cells, and this difference increased with time of exposure to the fungicide. In contrast, vinclozolin-treated cells had a higher chitin concentration than control cells. These biochemical alterations were followed by the disorganization and clearing of cells, and by the appearance of dense and dark masses outside the hyphae, presumably composed of cell debris. Hyphae exposed to vinclozolin were more curved and branched and had shorter cells than the controls. The results indicate that vinclozolin causes a slow but generalized leakage of pool metabolites; this release precedes cell lysis and is not the result of a rapid and gross damage to the cytoplasmic membrane.Key words: vinclozolin, Botrytis cinerea, pool metabolites, membrane damage.

The canopy structure of tall and short sorghum

1970 ◽  
Vol 75 (1) ◽  
pp. 123-131 ◽  
Author(s):  
P. R. Goldsworthy
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Canopy Structure ◽  
Crop Growth ◽  
Seasonal Fluctuations ◽  
Crop Growth Rate ◽  
Length Of Life ◽  
Light Profiles

SUMMARYChanges in the leaf area and light profiles of a tall and a short sorghum are described and the development of leaf area in these and in two other sorghums of intermediate height is examined in relation to the rate of appearance, the size and the length of life of the leaves. The extent to which these changes are related to the seasonal fluctuations in crop growth rate is discussed.

Differences in growth rate, body condition, habitat use and food availability between island and mainland lizard populations ofAnolis nebulosusin Jalisco, Mexico

2014 ◽  
Vol 30 (5) ◽  
pp. 493-501 ◽  
Author(s):  
Héctor Hugo Siliceo-Cantero ◽  
Andrés García
Keyword(s):  
Growth Rate ◽  
Habitat Use ◽  
Food Availability ◽  
Body Condition ◽  
Food Supply ◽  
Geographic Isolation ◽  
Seasonal Fluctuations ◽  
Continental Population ◽  
Two Populations

Abstract:Lizards of the genusAnolishave been widely studied, however, little is known about the effects of environmental seasonality, food availability and geographic isolation on body condition, growth rate and habitat use of lizards. The existence of an insular and a continental population ofAnolis nebulosus(clouded anole), separated by only 0.47 km, represents an ideal opportunity to address this topic. We compared seasonal fluctuations in food availability (arthropod density) for anoles, as well as body condition, growth rate and habitat use in the two populations. Food availability throughout the year was sampled every 2 mo by trapping arthropods at each site. Lizards were also monitored and measured every 2 mo by surveying three quadrats in each site over 2 y giving a total of 30 visits for each quadrat. Results suggested that composition and density of food supply was similar for the two populations. Nevertheless, food supply responded to seasonality of rainfall, with an increase of 1.5 times during the rainy season. Despite similarity in food availability, insular anoles had body condition that was 5–10 times better, with growth rate twice as fast, and used similar perches. The role of predation, and inter- and intraspecific competition are discussed as possible drivers.

Body composition and nutrient reserves of arctic caribou

1996 ◽  
Vol 74 (1) ◽  
pp. 136-146 ◽  
Author(s):  
K. L. Gerhart ◽  
R. G. White ◽  
R. D. Cameron ◽  
D. E. Russell
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Chemical Composition ◽  
Body Mass ◽  
Seasonal Changes ◽  
Rangifer Tarandus ◽  
Post Partum ◽  
Growth Patterns ◽  
Chemical Components ◽  
Adult Females

We determined seasonal changes in body mass and composition of arctic caribou (Rangifer tarandus granti) in relation to age and reproductive status. Chemical composition was determined for 37 caribou calves from the Central Arctic Herd ranging from 1 to 134 days of age and for 15 adult females collected from the same herd in October, May, and July. Body composition of 5 fetuses from the Central Arctic Herd, 13 calves from the Porcupine Herd, and 10 captive male reindeer (R. t. tarandus) was determined for comparison. Between October 1989 and May 1990, body fat and protein of adult females declined by maxima of 45 and 29%, respectively; an additional 32% of fat was lost between May and July. Mobilization of large amounts of fat and protein suggests winter undernutrition. Chemical composition and growth patterns of calves did not differ between the herds. The growth rate of Central Arctic Herd calves was high during the first 28 d post partum (402 g/d), but both growth rate and fatness declined between 4 and 6 weeks of age (to 306 and −18.3 g/d, respectively), perhaps in response to insect harassment. Birth masses of males and females did not differ, but by autumn, male calves were 9.1 kg heavier than females. Chemical components (water, fat, protein, ash) were highly correlated with body mass, ingesta-free body mass, and carcass mass. Percentages of fat and water were inversely related, but the intercept decreased with age. Marked seasonal hypertrophy of liver and kidneys was noted in caribou, suggesting the presence of mobilizable protein reserves. Seasonal changes in organ masses may also reflect variations in metabolic activity and nutrient intake.

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