scholarly journals Influence of temperature on growth and survival of juvenile winter flounder, Pseudopleuronectes americanus (Walbaum) reared under continuous light

2020 ◽  
Author(s):  
Paul Casey ◽  
Vahid Zadmajid ◽  
Ian A. E. Butts ◽  
Sune Riis Sørensen ◽  
Matthew K. Litvak
Keyword(s):  
Continuous Light ◽  
Winter Flounder ◽  
Pseudopleuronectes Americanus ◽  
Growth And Survival ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

Blood and plasma viscosity of winter flounder: influence of temperature, red cell concentration, and shear rate

1983 ◽  
Vol 61 (10) ◽  
pp. 2344-2350 ◽  
Author(s):  
Mark S. Graham ◽  
Garth L. Fletcher
Keyword(s):  
Shear Rate ◽  
Blood Viscosity ◽  
Cell Concentration ◽  
Plasma Viscosity ◽  
Winter Flounder ◽  
Red Cell ◽  
Pseudopleuronectes Americanus ◽  
Total Blood ◽  
Influence Of Temperature ◽  
Rate Dependent

The effects of temperature, red cell concentration, and shear rate on the viscosity of blood from the winter flounder (Pseudopleuronectes americanus) were evaluated using a cone-plate viscometer. The viscosity of blood and plasma was shear rate dependent at all temperatures studied (−1 to 20 °C) with the highest values occurring at the lowest temperature and shear rate. At normal hematocrits (20%), plasma appeared to account for at least 50% of the total blood viscosity. The effects of hematocrit on viscosity were dependent on temperature. At higher temperatures (10–20 °C), increases in hematocrit resulted in a near-exponential increase in viscosity. At lower temperatures (5 °C) and shear rates (4.5 s−1) no significant increase in viscosity occurred between hematocrits of 11 and 43%. The influence of temperature and shear rate on blood viscosity suggest that winter flounder may have to contend with a fivefold increase in blood viscosity when acclimating from summer to winter water temperatures.

scholarly journals Influence of the timing of weaning on growth and survival of juvenile winter flounder (Pseudopleuronectes americanus)

2018 ◽  
Vol 96 (12) ◽  
pp. 1291-1298 ◽  
Author(s):  
M. Bélanger ◽  
F. Turcotte ◽  
R. Tremblay ◽  
Y. Lambert ◽  
M.K. Litvak ◽  
...  
Keyword(s):  
Larval Stage ◽  
Brachionus Plicatilis ◽  
Artemia Salina ◽  
Winter Flounder ◽  
Nutritional Deficiencies ◽  
Pseudopleuronectes Americanus ◽  
Growth And Survival ◽  
Larval Stages ◽  
Live Feed ◽  
Trophic Markers

Metamorphosis is a critical developmental stage that presents particular challenges in fish aquaculture. The sharp increase in mortality that accompanies this transformation has often been attributed to nutritional deficiencies. Providing live feed (the rotifer Brachionus plicatilis Müller, 1786 and the brine shrimp Artemia salina (Linnaeus, 1758)) during the larval stages is costly and labour intensive, which explains why much effort has been put on early weaning. However, previous observations in winter flounder (Pseudopleuronectes americanus (Walbaum, 1792)) indicate that juveniles weaned after settlement had better survival than those weaned at the larval stage. In this study, we tested whether late weaning (at settlement (W0) and groups maintained on co-feeding for 1 month (W1), two months (W2), or 3 months (W3) after settlement) could improve juvenile survival and lipid composition. Our results demonstrated that maintaining co-feeding beyond the larval stage was essential for after-settlement survival. Juveniles co-fed until 90 days after settlement were 32.5% heavier. Analyses of fatty acid trophic markers suggested that juveniles preferentially fed on enriched rotifers rather than inert food. No pigmentation or fin erosion problems were observed in any of the weaning treatments, which indicates good rearing conditions.

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

The Influence of Temperature on Successful Reproductions of Burbot, Lota Lota (L.) Under Hatchery Conditions

2010 ◽  
Vol 25 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Daniel Żarski ◽  
Dariusz Kucharczyk ◽  
Wojciech Sasinowski ◽  
Katarzyna Targońska ◽  
Andrzej Mamcarz
Keyword(s):  
Lota Lota ◽  
Influence Of Temperature ◽  
Influence Of Temperature On
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