Influence of physiological state on indices of respiration rate in protozoa

Density-Dependent Individual and Population-Level Metabolic Rates in a Suite of Single-Celled Eukaryotes

“…The other approaches to measuring metabolic rate gave qualitatively the same patterns as produced with our methods. Nässberger and Monti's [13] study with Amoeba showed the same densitydependent pattern of B pc using direct microcalorimetry of heat production, and Finlay et al's [12] study on Tetrahymena using a Warburg apparatus produced a pattern of density-dependent B pc that was quantitatively similar to our experiment with Tetrahymena, even showing similar values for 11 ( 11 = 0.19 from our data and 11 = 0.12 from Finlay et al's [12] data).…”

Density-Dependent Individual and Population-Level Metabolic Rates in a Suite of Single-Celled Eukaryotes

“…The other approaches to measuring metabolic rate gave qualitatively the same patterns as produced with our methods. Nässberger and Monti's [13] study with Amoeba showed the same densitydependent pattern of B pc using direct microcalorimetry of heat production, and Finlay et al's [12] study on Tetrahymena using a Warburg apparatus produced a pattern of density-dependent B pc that was quantitatively similar to our experiment with Tetrahymena, even showing similar values for 11 ( 11 = 0.19 from our data and 11 = 0.12 from Finlay et al's [12] data).…”

Respiratory electron transport system (ETS) activities in zooplankton and micronekton of the Indo-Pacific region

“…If the ETS activities measured at the drogue stations in August are representative for the whole area, as is the case in February, than it may be concluded that the response of the zooplankton/micronekton community to the seasonal changes in hydrography and fertility in the area is reflected mainly by variance in biomass and behaviour (migration) and not by an adjustment in specific activity. This agrees with the results of Finlay et al (1983) who found that protozoans changed in cell size but not in specific activity under changing environmental conditions. Although marine organisms are apparently capable of Table 3.…”

“…This is in contrast to the findings of some authors reporting a more or less rapid inactivation in homogenates, e.g. a loss of 50 % in activity after 4 h at 0 "C in protozoans (Finlay et al 1983) and after 30 h at 2 "C in copepods (Bbmstedt 1980). For homogenates kept at room temperature even a decrease of 97 % of activity after 3 h is reported by Bamstedt (1980).…”

Mitochondrial electron transport activity and metabolism of experimentally bleached hermatypic corals

“…Electron transport system activity normalized by the surface of the host can be used as an easy to measure overall health (metabolism) indicator for the host. It has already been used for this purpose with other organisms (Finlay et al, 1983;Simcic, 2004) and is typically used to estimate the respiration rates of plankton (Arístegui and Montero, 1995;Bamstedt, 1980;Packard, 1971) or the overall metabolism of meiofauna (Cammen and Corwin, 1990;Olanczukneyman and Vosjan, 1977;Wada et al, 2012). Decreased ETSA in the different treatments and a strong correlation with metabolic rates was observed, confirming the previous results obtained with the same methods .…”

Density-Dependent Individual and Population-Level Metabolic Rates in a Suite of Single-Celled Eukaryotes

“…The other approaches to measuring metabolic rate gave qualitatively the same patterns as produced with our methods. Nässberger and Monti's [13] study with Amoeba showed the same densitydependent pattern of B pc using direct microcalorimetry of heat production, and Finlay et al's [12] study on Tetrahymena using a Warburg apparatus produced a pattern of density-dependent B pc that was quantitatively similar to our experiment with Tetrahymena, even showing similar values for 11 ( 11 = 0.19 from our data and 11 = 0.12 from Finlay et al's [12] data).…”

Respiratory electron transport system (ETS) activities in zooplankton and micronekton of the Indo-Pacific region

“…If the ETS activities measured at the drogue stations in August are representative for the whole area, as is the case in February, than it may be concluded that the response of the zooplankton/micronekton community to the seasonal changes in hydrography and fertility in the area is reflected mainly by variance in biomass and behaviour (migration) and not by an adjustment in specific activity. This agrees with the results of Finlay et al (1983) who found that protozoans changed in cell size but not in specific activity under changing environmental conditions. Although marine organisms are apparently capable of Table 3.…”

“…This is in contrast to the findings of some authors reporting a more or less rapid inactivation in homogenates, e.g. a loss of 50 % in activity after 4 h at 0 "C in protozoans (Finlay et al 1983) and after 30 h at 2 "C in copepods (Bbmstedt 1980). For homogenates kept at room temperature even a decrease of 97 % of activity after 3 h is reported by Bamstedt (1980).…”

Mitochondrial electron transport activity and metabolism of experimentally bleached hermatypic corals

“…Electron transport system activity normalized by the surface of the host can be used as an easy to measure overall health (metabolism) indicator for the host. It has already been used for this purpose with other organisms (Finlay et al, 1983;Simcic, 2004) and is typically used to estimate the respiration rates of plankton (Arístegui and Montero, 1995;Bamstedt, 1980;Packard, 1971) or the overall metabolism of meiofauna (Cammen and Corwin, 1990;Olanczukneyman and Vosjan, 1977;Wada et al, 2012). Decreased ETSA in the different treatments and a strong correlation with metabolic rates was observed, confirming the previous results obtained with the same methods .…”

Density-Dependent Individual and Population-Level Metabolic Rates in a Suite of Single-Celled Eukaryotes

“…The other approaches to measuring metabolic rate gave qualitatively the same patterns as produced with our methods. Nässberger and Monti's [13] study with Amoeba showed the same densitydependent pattern of B pc using direct microcalorimetry of heat production, and Finlay et al's [12] study on Tetrahymena using a Warburg apparatus produced a pattern of density-dependent B pc that was quantitatively similar to our experiment with Tetrahymena, even showing similar values for 11 ( 11 = 0.19 from our data and 11 = 0.12 from Finlay et al's [12] data).…”

Respiratory electron transport system (ETS) activities in zooplankton and micronekton of the Indo-Pacific region

“…If the ETS activities measured at the drogue stations in August are representative for the whole area, as is the case in February, than it may be concluded that the response of the zooplankton/micronekton community to the seasonal changes in hydrography and fertility in the area is reflected mainly by variance in biomass and behaviour (migration) and not by an adjustment in specific activity. This agrees with the results of Finlay et al (1983) who found that protozoans changed in cell size but not in specific activity under changing environmental conditions. Although marine organisms are apparently capable of Table 3.…”

“…This is in contrast to the findings of some authors reporting a more or less rapid inactivation in homogenates, e.g. a loss of 50 % in activity after 4 h at 0 "C in protozoans (Finlay et al 1983) and after 30 h at 2 "C in copepods (Bbmstedt 1980). For homogenates kept at room temperature even a decrease of 97 % of activity after 3 h is reported by Bamstedt (1980).…”

Mitochondrial electron transport activity and metabolism of experimentally bleached hermatypic corals

“…Electron transport system activity normalized by the surface of the host can be used as an easy to measure overall health (metabolism) indicator for the host. It has already been used for this purpose with other organisms (Finlay et al, 1983;Simcic, 2004) and is typically used to estimate the respiration rates of plankton (Arístegui and Montero, 1995;Bamstedt, 1980;Packard, 1971) or the overall metabolism of meiofauna (Cammen and Corwin, 1990;Olanczukneyman and Vosjan, 1977;Wada et al, 2012). Decreased ETSA in the different treatments and a strong correlation with metabolic rates was observed, confirming the previous results obtained with the same methods .…”