Decision three to predict respiratory rate of piglets submitted to cold conditions
Laen...
Kuupäev
2021
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Pigs subjected to thermal conditions outside their comfort zones may show altered
physiological and behavioural responses, which may consequently cause productive losses. For
these reasons, the aim of this paper is to develop a decision tree for the prediction of respiratory
rate (RR, mov min-1
) of piglets exposed to different thermal situations. The experiment was
carried out in an experimental pig farm of the Universidad Nacional de Colombia Campus
Medellin, located at the San Pablo Agraria Experimental Station located in the eastern sector of
the department of Antioquia, during August 2019. A database containing the raw data for
dry bulb temperature - tdb (°C), and relative humidity - RH (%) as input variables, and
RR (mov min-1
) of six piglets were assessed every two hours as output variable for piglets was
generated. The experimental database was composed of 78 observed data. The decision trees were
developed to conditions of tdb between 19.2 to 29.5 °C and RH between 50.2 to 88.4%. In the
experimental period, RR of piglets submitted to tdb higher than 27.1 °C the RR was around
60 mov min-1
, tdb smaller than 27.1 °C the RR varied from 36 to 46 mov min-1
. These low values
of physiological responses may indicate that the piglets are not in a comfortable situation, so their
development, welfare and production can be affected. The decision tree developed can be useful
to provide a quick understanding of the piglet’s welfare condition based on the environmental
variables and physiological responses.
Kirjeldus
Received: January 16th, 2021 ; Accepted: March 13th, 2021 ; Published: October 5th, 2021 ; Correspondence: paricia.ponciano@ufla.br
Märksõnad
animal welfare, pig, physiological responses, thermal stress, articles