Zur Problematik der Klimaempfindlichkeit bei Haustieren* (V)

Contents: Following the first communication some more parameters are discussed, so as freezing and thawing resistence as well as the percentage of morphologically alterated spermatozoa after dividing them into various subunits. The freezing resistence reacts as till now the first variable with a highly significant diminution on the first weaker loading period eight days after its end. The evaluation with regard to the thawing resistence does not give any evidence over relations to sperm quality or to single sperm properties. Concerning the morphological alterations of the spermatozoa there are highly significant augmentations of the percentages of acrosomal cap, head, neck, main piece, and tail anomalies, while the middle piece and the double and multiple malformations do not reach the threshold of significance. Another arrangement of the morphological alterations shows an unimportant, nonsignificant increase of the unripe spermatozoa following the 2^nd (warmer) loading and a guaranteed increase of the percentage of primarily specific malformations. Essentially higher differences occur with the unspecific malformations, the highest and the most lasting changed variations, however, are given in the secondary malformations.