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Updated: Jan 31, 2026

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants

Published on: September 16, 2022

離乳時の牛舎移動が黒毛和種子牛の行動変化とストレスに及ぼす影響

Emi Yoshida^1,2, Namiko Kohama¹, Mitsuhiro Sakase¹

¹Hokubu Agricultural Institute, Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries, Asago, Hyogo, Japan.

Animal science journal = Nihon chikusan Gakkaiho

|January 30, 2026

Abstract:

The effects of pen relocation at dam-calf separation on behavioral changes and stress were examined in Japanese Black calves. Male and female calves were randomly assigned at 4 months of age to one of two groups: a non-relocation group, in which the dam was moved to a separate pen while the calf remained in its original pen; and a relocation group, in which the calf was moved while the dam remained in place. Calves were observed for step counts per 24 h and vocalizing counts per 12 h and per hour, and for time spent feeding, lying, and ruminating over 12-h periods around weaning. Blood samples were collected for hematological analysis and serum cortisol assay just before and after weaning. Calves in the non-relocation group had significantly fewer steps and less vocalization than those in the relocation group after weaning. Postweaning lying, feeding, and ruminating times were significantly longer in the non-relocation group than in the relocation group. Neutrophil-to-lymphocyte ratio and serum cortisol concentrations were also significantly lower in the non-relocation group after weaning. These findings suggest that avoiding pen relocation of calves during weaning may alleviate behavioral disturbances and reduce stress associated with maternal separation in Japanese Black cattle.

キーワード:

黒毛和種子牛牛舎移動ストレス離乳

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