calving

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calving

[′kav·iŋ]
(geology)
The breaking off of a mass of ice from its parent glacier, iceberg, or ice shelf. Also known as ice calving.
(vertebrate zoology)
Giving birth to a calf.
References in periodicals archive ?
The role of this predictor was to reflect the influence of herd-level factors on the occurrence of difficult calving in the heifer or cow.
The risk of difficult calving increased with an increasing CI but, according to the cited authors, it could be substantially reduced by the appropriate mating decisions and the avoidance of too late services.
Effects of a difficult calving on the subsequent health and welfare of the dairy cows and calves [dissertation].
We found the highest proportions of correctly diagnosed easy, moderate and difficult calvings in heifers obtained on the T set for GDA (0.3784), NBC (0.8000), and MARS (0.8455), respectively (Table 4).
We would like to emphasize again that the most substantial measure of the model detection performance is its Se on the T set, which was unsatisfactory for cows in the current work, but one should also take into account that the frequency of difficult calvings in the cow dataset was very low (approximately 0.030) and this could have negatively affected the ability of the models to correctly diagnose such cases.
In the case of the three-class system for the calving records of cows, the percentage of correct diagnosis for the first two classes (easy and moderate) was satisfactory but it was unacceptable for the category of difficult calvings, although the overall Acc was also relatively good.
This study shows that different types of ANN, MARS, and NBC as well as more traditional methods such as GDA and LR are useful for the detection of difficult calvings in dairy heifers.
[8.] Zaborski D, Grzesiak W Detection of difficult calvings in dairy cows using neural classifier.
First-parity cows were more likely to have a difficult calving relative to older cows, whereas older parity cows did not significantly differ from each other in risk of dystocia.
Difficult and very difficult calvings were characterized by a significant increase in GL values.