Characterization of gizzards and grits of wild cranes found dead at IzumiPlain in Japan

The Journal of Veterinary Medical Science

Kozo TAKASE¹  Takeshi OBI¹  Yuko HARAGUCHI²  Mima UEGOMORI³ 

[1] Department of Veterinary Medicine, Joint Faculty ofVeterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065,Japan;Izumi City Crane Museum, Crane Park Izumi, Izumi,Kagoshima 899-0208, Japan;Laboratory of Veterinary Microbiology, Department ofVeterinary Medicine, Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto,Kagoshima 890-0065, Japan

关键词: gizzard;    grit;    Hooded Crane;    White-naped Crane;   

DOI  :  10.1292/jvms.17-0407

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

We analyzed the gizzards, and grits retained in the gizzards of 41 cranes that migratedto the Izumi Plain during the winter of 2015/2016 and died there, either due to accidentor disease. These included 31 Hooded Cranes (Grus monacha) and 10White-naped Cranes (G. vipio). We determinedbody weight, gizzard weight, total grit weight and number per gizzard, and size, shape,and surface roundness of the grits. Average gizzard weights were 92.4 g for Hooded Cranesand 97.1 g for White-naped Cranes, and gizzard weight positively correlated with bodyweight in both species. Average total grit weights per gizzard were 19.7 g in HoodedCranes and 25.7 g in White-naped Cranes, and were significantly higher in the latter.Average percentages of body weight to grit weight were 0.8% in Hooded Cranes and 0.5% inWhite-naped Cranes. Average grit number per gizzard was 693.5 in Hooded Cranes and 924.2in White-naped Cranes, and were significantly higher in the latter. The average grit sizewas 2.8 mm in both species. No differences were found in the shape and surface roundnessof grits between the two species. To the best of our knowledge, this is the first study onthe grits retained in the gizzards of Hooded and White-naped Cranes.

【 授权许可】

Unknown