scholarly journals Surface-Related Toxicity of Polystyrene Beads to Nematodes and the Role of Food Availability

2020 ◽  
Vol 54 (3) ◽  
pp. 1790-1798 ◽  
Author(s):  
Marie-Theres Mueller ◽  
Hendrik Fueser ◽  
Lam Ngoc Trac ◽  
Philipp Mayer ◽  
Walter Traunspurger ◽  
...  
Keyword(s):  
Food Availability ◽  
Polystyrene Beads

scholarly journals Role of divalent cations, pH, cytoskeleton componentes and surface charge on the adhesion of Trichomonas vaginalis to a polystyrene substrate

1987 ◽  
Vol 82 (3) ◽  
pp. 379-384 ◽  
Author(s):  
Fernando Costa e Silva Filho ◽  
Cezar Antonio Elias ◽  
Wanderley de Souza
Keyword(s):  
Surface Charge ◽  
Incubation Time ◽  
Trichomonas Vaginalis ◽  
Cytochalasin B ◽  
Culture Media ◽  
Divalent Cations ◽  
Polystyrene Beads ◽  
Different Strains ◽  
Adhesion Index

The process of adhesion of three different strains of Trichomonas vaginalis to a polystyrene substrate was analysed. The process of adhesion was dependent on the time of incubation and the pH of the phosphate-buffered solution (PBS) in which the parasites were suspended. The highest indices of adhesion were observed after an incubation time of 60 min at pH 6.6. The adhesion index increased when the parasites were incubated in the presence of culture media or when Ca++ or Mg++ was added to the PBS solution, whereas cytochalasin B, trypsin or neuraminidase reduced adhesion. Incubation of the parasites in the presence of poly-L-lysine facilitated the process of adhesion. Incubation of the parasites or polystyrene beads in the presence of poly-L-lysine led to important changes in their surface charge.

The role of food availability in hypoxia resistance of Amazonian Oscars

2008 ◽  
Vol 150 (3) ◽  
pp. S58 ◽  
Author(s):  
G. De Boeck ◽  
C. Wood ◽  
F. Iftikar ◽  
G. Scott ◽  
K. Sloman ◽  
...  
Keyword(s):  
Food Availability

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.

Sign in / Sign up

Export Citation Format

Share Document