The measurement of specific dynamic action in fishes

Specific dynamic action ( SDA ) is the postprandial increase in oxygen uptake. Whereas it is easy to measure in fishes that remain calm and motionless during the entire digestion period, spontaneous locomotor activity is a frequent problem that leads to overestimation of SDA amplitude and magnitude...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Chabot, D., Koenker, R., Farrell, A. P.
Other Authors: Natural Sciences and Engineering Research Council of Canada
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2016
Subjects:
atlantic cod
Gadus morhua
Online Access:http://dx.doi.org/10.1111/jfb.12836
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12836
https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12836
Description
Summary:Specific dynamic action ( SDA ) is the postprandial increase in oxygen uptake. Whereas it is easy to measure in fishes that remain calm and motionless during the entire digestion period, spontaneous locomotor activity is a frequent problem that leads to overestimation of SDA amplitude and magnitude (area under the curve, bound by the standard metabolic rate, SMR ). Few studies have attempted to remove the effect of fish activity on SDA . A new method, non‐parametric quantile regression, is described to estimate SDA even when pronounced circadian activity cycles are present. Data from juvenile Atlantic cod Gadus morhua are used to demonstrate its use and advantages compared with traditional techniques. Software (scripts in the R language) is provided to facilitate its use.

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