scholarly journals Aquaglyceroporin HC‐3 mediates hypotonicity‐induced cell volume and shape changes in cultured erythrocytes from Cope’s gray treefrog, Hyla chrysoscelis (1099.4)

2014 ◽  
Vol 28 (S1) ◽  
Author(s):  
Mark Hawk ◽  
Philip Nickell ◽  
James Frisbie ◽  
David Goldstein ◽  
Carissa Krane
Keyword(s):  
Cell Volume ◽  
Hyla Chrysoscelis ◽  
Gray Treefrog ◽  
Shape Changes

Expression and immunolocalization of aquaporins HC-1, -2, and -3 in Cope's gray treefrog, Hyla chrysoscelis

2010 ◽  
Vol 157 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Ram Naresh Pandey ◽  
Sushmita Yaganti ◽  
Stephanie Coffey ◽  
James Frisbie ◽  
Khadijeh Alnajjar ◽  
...  
Keyword(s):  
Hyla Chrysoscelis ◽  
Gray Treefrog

Habitat Selection and Site Fidelity of Cope's Gray Treefrog (Hyla chrysoscelis) at the Aquatic-Terrestrial Ecotone

2008 ◽  
Vol 42 (2) ◽  
pp. 378-385 ◽  
Author(s):  
Shannon E. Pittman ◽  
Amory L. Jendrek ◽  
Steven J. Price ◽  
Michael E. Dorcas
Keyword(s):  
Habitat Selection ◽  
Site Fidelity ◽  
Hyla Chrysoscelis ◽  
Gray Treefrog

scholarly journals Red cell rheology in stomatocyte-echinocyte transformation: roles of cell geometry and cell shape

Blood ◽  
1986 ◽  
Vol 67 (4) ◽  
pp. 1110-1118 ◽  
Author(s):  
WH Reinhart ◽  
S Chien
Keyword(s):  
Cell Volume ◽  
Surface Area ◽  
Optimum Shape ◽  
Red Cell ◽  
Drug Induced ◽  
Filtration Resistance ◽  
Shear Rates ◽  
Geometric Factors ◽  
Shape Changes

Abstract The influence of the shape of the red blood cell during stomatocyte- echinocyte transformation on its deformability was studied by microsieving through pores with diameters of 2.6, 4.5, and 6.9 micron. A stomatocytic transformation was produced by chlorpromazine (0.02, 0.1, and 0.5 mmol/L) and an echinocytic transformation by sodium salicylate (7.5, 30, and 120 mmol/L). For spherostomatocytes, an increase in filtration resistance through 2.6 and 4.5 micron pores was observed, whereas for spheroechinocytes, a decrease in filtration resistance through 2.6 micron pores was found. Larger pores (6.9 micron) were not sensitive to those shape changes. The changes in deformability can be explained by the fact that the surface area of (sphero)-stomatocytes decreased, whereas that of (sphero)-echinocytes increased; the cell volume remained essentially constant. Echinocytes produced by 24-hour adenosine triphosphate depletion differed from drug- induced echinocytes: they had an increased cell volume at constant surface area and consequently an increased filtration resistance through 2.6- and 4.5-micron filter pores. Shape changes with spicule formation are therefore not a homogeneous entity, and cell geometric factors (eg, surface area and volume) must be assessed with care. The viscosity of red cell suspensions at a hematocrit level of 45% was higher for drug-induced echinocytes than discocytes or stomatocytes at all shear rates tested. We conclude that the normal discocyte represents an optimum shape for the flow in vivo since a stomatocytic transformation could impair the passage through the microcirculation (decrease in cell filterability) and an echinocytic transformation could impair the flow in larger vessels (increase in blood viscosity).

Effects of pesticide exposure and the amphibian chytrid fungus on gray treefrog (Hyla chrysoscelis) metamorphosis

2014 ◽  
Vol 33 (10) ◽  
pp. 2358-2362 ◽  
Author(s):  
Kristina M. Gaietto ◽  
Samantha L. Rumschlag ◽  
Michelle D. Boone
Keyword(s):  
Pesticide Exposure ◽  
Hyla Chrysoscelis ◽  
Chytrid Fungus ◽  
Amphibian Chytrid Fungus ◽  
Gray Treefrog

Mating behavior and determinants of male mating success in the gray treefrog, Hyla chrysoscelis

1991 ◽  
Vol 69 (1) ◽  
pp. 246-250 ◽  
Author(s):  
Mark E. Ritke ◽  
Raymond D. Semlitsch
Keyword(s):  
Body Size ◽  
Mating Behavior ◽  
Mating Success ◽  
Male Mating ◽  
Hyla Chrysoscelis ◽  
Male Mating Success ◽  
Male Aggression ◽  
Previous Night ◽  
Significant Difference ◽  
Gray Treefrog

We studied mating behavior and male mating success in a population of gray treefrogs (Hyla chrysoscelis) during 1987 and 1988 in western Tennessee. During 1988, individual males called from 1 to 7 nights ([Formula: see text]) and mated 0–4 times ([Formula: see text]). The number of nights that males called or achieved amplexus was not related to body size, but males that called on more nights had a relatively greater chance of mating. There was no significant difference in body size between mated and unmated males on any of the nights tested. Males that mated or called on a previous night were not more likely to achieve amplexus than males that had not mated previously or those that were new to the population. We have no strong evidence to suggest that assortative mating was characteristic of our population or that male–male aggression directly influences female choice.

scholarly journals Membrane trafficking of aquaglyceroporin HC‐3 in erythrocytes from the freeze tolerant anuran, Cope's gray treefrog, Hyla chrysoscelis

2013 ◽  
Vol 27 (S1) ◽  
Author(s):  
Elizabeth Claire Wetzel ◽  
Philip Nickell ◽  
Venkateshwar Mutyam ◽  
James Frisbie ◽  
David L Goldstein ◽  
...  
Keyword(s):  
Membrane Trafficking ◽  
Hyla Chrysoscelis ◽  
Freeze Tolerant ◽  
Gray Treefrog
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