A 15-year study on the relationship between beech (Fagus crenata) reproductive-organ production and the numbers of nuisance Japanese black bears (Ursus thibetanus japonicus) killed in a snowy rural region in central Japan

2021 ◽  
Author(s):  
Hideyuki Ida
Keyword(s):  
Reproductive Organ ◽  
Fagus Crenata ◽  
Black Bears ◽  
Central Japan ◽  
Rural Region ◽  
Ursus Thibetanus ◽  
The Relationship

Relationships among changes of serum leptin concentration, leptin mRNA expression in white adipose tissue (WAT), and WAT fat-cell size in female Japanese black bears (Ursus thibetanus japonicus)

2008 ◽  
Vol 86 (9) ◽  
pp. 1042-1049 ◽  
Author(s):  
S. Nakamura ◽  
T. Okano ◽  
H. Shibata ◽  
M. Saito ◽  
T. Komatsu ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Reproductive Success ◽  
Cell Size ◽  
White Adipose Tissue ◽  
Black Bears ◽  
Fat Cell ◽  
Serum Leptin ◽  
Ursus Thibetanus ◽  
Fat Cell Size ◽  
The Relationship

As a first step to study the relationship between fat accumulation and reproductive success in Japanese black bears ( Ursus thibetanus japonicus Schlegel, 1857) with the focus on leptin, we determined leptin cDNA sequences in the bears. Next, we studied the possibility of white adipose tissue (WAT) as a leptin secretion source by observing the changes of leptin mRNA expression in WAT by semiquantitative real-time reverse transcript – polymerase chain reaction, the index of WAT fat-cell size, and serum leptin concentration in pregnant bears. Then, based on our results, we discussed roles of leptin in those bears. The amino acid sequences of leptin from the bears were highly identical to that of other carnivores. The expression of leptin mRNA in WAT was detected from September to January, with a tendency to increase in late November and January; the relationship between changes in the index of WAT fat-cell size and those in serum leptin concentration was high (r = 0.55, P < 0.01), with an increase in both in mid-November. These results suggested that leptin was mainly secreted from WAT in bears and that serum leptin concentrations might reflect their nutritional condition. Moreover, leptin might serve as an indicator of their fat mass, which would affect their survival during hibernation and their reproductive success.

Electroejaculation and semen characteristics of Asiatic Black bears (Ursus thibetanus)

2007 ◽  
Vol 101 (3-4) ◽  
pp. 358-364 ◽  
Author(s):  
L.M. Chen ◽  
R. Hou ◽  
Z.H. Zhang ◽  
J.S. Wang ◽  
X.R. An ◽  
...  
Keyword(s):  
Black Bears ◽  
Ursus Thibetanus ◽  
Semen Characteristics

scholarly journals Foot-and-mouth disease in Asiatic black bears (Ursus thibetanus)

2014 ◽  
Vol 26 (5) ◽  
pp. 705-713 ◽  
Author(s):  
Kirsty Officer ◽  
Nguyen Thi Lan ◽  
Leanne Wicker ◽  
Nguyen Thi Hoa ◽  
Annemarie Weegenaar ◽  
...  
Keyword(s):  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Black Bears ◽  
Ursus Thibetanus ◽  
Foot And Mouth

scholarly journals Does hard mast production affect patterns of cementum annuli formation in premolar teeth of Asian black bears (Ursus thibetanus)?

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0211561
Author(s):  
Kahoko Tochigi ◽  
Yukino Aoki ◽  
Tetsuya Maruyama ◽  
Koji Yamazaki ◽  
Chinatsu Kozakai ◽  
...  
Keyword(s):  
Black Bears ◽  
Ursus Thibetanus ◽  
Mast Production

Expressions of Steroidogenic Enzymes mRNA in the Testes of Japanese Black Bears (Ursus thibetanus japonicus) as Revealed by in situ Hybridization.

2008 ◽  
Vol 78 (Suppl_1) ◽  
pp. 297-297
Author(s):  
Ruriko Iibuchi ◽  
Junko Nio-Kobayashi ◽  
Sachiko Nakamura ◽  
Makoto Asano ◽  
Toshihiko Iwanaga ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Black Bears ◽  
Steroidogenic Enzymes ◽  
Ursus Thibetanus

Characteristics of a Hepatozoonosis in Lungs of Japanese Black Bears (Ursus thibetanus japonicus)

2003 ◽  
Vol 65 (3) ◽  
pp. 385-388 ◽  
Author(s):  
Shigehiko UNI ◽  
Makoto MATSUBAYASHI ◽  
Eiichi IKEDA ◽  
Yoshitaka SUZUKI
Keyword(s):  
Black Bears ◽  
Ursus Thibetanus
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