Open AccessSimple and partial correlations between the epithelial tissue content of the thyroid, the body weight, age, and level of milk yield in Ayrshire cows
Author(s) -
Vappu Kossila,
Kaarina Heliander
Publication year - 1969
Publication title -
agricultural and food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.347
H-Index - 35
eISSN - 1795-1895
pISSN - 1459-6067
DOI - 10.23986/afsci.71735
Subject(s) - thyroid , incidence (geometry) , body weight , zoology , endocrinology , biology , medicine , physiology , mathematics , geometry
The absolute amount of the epithelial tissue in the thyroid (Eg) of cows was significantly and more closely correlated with the body weight corrected for pregnancy and/or degree of fatness than with the live weight. Age had practically no effect on the Eg, this observation being of value in case cows of various ages are to be used as material in studies on the incidence of endemic goitre. Due to a group of goitrous cows in the investigated material, significant negative correlation was obtained between the Eg and the milk yield. The implications of this discovery are discussed.