GrHalO2crit: Oxygen uptake data from an adult Greenland halibut to...

In denis-chabot/fishMO2: Calculate and Plot SMR, O2crit and SDA, and convert between oxygen units

Description

Oxygen uptake data from an adult (1.563 kg) Greenland halibut (Reinhardtius hippoglossoides) measured by intermittend-flow respirometry. During the last few hours of the experiment, the ambient dissolved oxygen was slowly reduced until the fish was no longer able to sustain its Standard Metabolic Rate (SMR), so as to calculate its critical oxygen level (O2crit).

Format

A data frame with 220 observations on the following 6 variables:

DateTime

a POSIXct vector indicating date and time for each measurement

Logtime_hr

a numeric vector indicating the time, in hours, relative to feeding. Measurements obtained before feeding have a negative value for this variable

MO2

a numeric vector representing oxygen uptake, in micromoles of oxygen per min per kg of body mass

r2

a numeric vector representing the coefficient of determination R^2 of the regression between dissolved oxygen and time for a given value of MO2

Aver_O2

a numeric vector representing the average level of dissolved oxygen (in kPa) in the respirometer during each measurement of MO2

DO

a numeric vector representing the equivalent of Aver_O2 in % saturation units

Details

Results of an experiment with a Greenland halibut Reinhardtius hippoglossoides of 1.563 kg placed in a 48.43 L respirometer. Oxygen uptake was measured by intermittent-flow respirometry for about 2.5 days. These measurements allowed the determination of the Standard Metabolic Rate (SMR) by the method described in Chabot et al. 2016, using the calcSMR function from this package. At this point, dissolved oxygen was decreased slowly until the fish could no longer sustain its SMR. The calcO2crit function from this package can be used to determine O2crit (in % saturation).

Source

Collected by Denis Chabot at the Maurice-Lamontagne Institute, Department of Fisheries and Oceans, Canada.

References

Chabot, D., Steffensen, J. F. and Farrell, A. P. (2016) The determination of the standard metabolic rate in fishes. Journal of Fish Biology 88, 81-121.

Claireaux, Guy and Chabot, Denis (2016) Responses by fishes to environmental hypoxia: integration through Fry's concept of aerobic metabolic scope. Journal of Fish Biology 88, 232-251. doi:doi:10.1111/jfb.1283

Examples

data(GrHalO2crit)
plot(MO2~DateTime, data=GrHalO2crit)

denis-chabot/fishMO2 documentation built on July 16, 2020, 1:53 a.m.