scholarly journals Changes in Sexual Behavior and Fecal Steroid Hormone Concentrations during the Breeding Season in Female Hokkaido Brown Bears (Ursus arctos yesoensis) under Captive Condition

2003 ◽  
Vol 65 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Akiko ISHIKAWA ◽  
Hideyuki SAKAMOTO ◽  
Seiji KATAGIRI ◽  
Yoshiyuki TAKAHASHI
Keyword(s):  
Sexual Behavior ◽  
Breeding Season ◽  
Ursus Arctos ◽  
Steroid Hormone ◽  
Brown Bears ◽  
Fecal Steroid ◽  
Captive Condition

scholarly journals Observation of sexual behavior under captive conditions in Hokkaido brown bears (Ursus arctos yesoensis).

1985 ◽  
Vol 31 (4) ◽  
pp. 203-210 ◽  
Author(s):  
Toshio TSUBOTA ◽  
Hiroshi KANAGAWA ◽  
Kenichi TAKAHASHI ◽  
Ken YASUE ◽  
Shigeharu FUKUNAGA
Keyword(s):  
Sexual Behavior ◽  
Ursus Arctos ◽  
Brown Bears

scholarly journals Testosterone-related and seasonal changes in sebaceous glands in the back skin of adult male brown bears (Ursusarctos)

2018 ◽  
Vol 96 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Jumpei Tomiyasu ◽  
Yojiro Yanagawa ◽  
Yoshikazu Sato ◽  
Michito Shimozuru ◽  
Masashi Nagano ◽  
...  
Keyword(s):  
Breeding Season ◽  
Adult Male ◽  
Seasonal Changes ◽  
Ursus Arctos ◽  
Scent Marking ◽  
Plasma Testosterone ◽  
Sebaceous Glands ◽  
Brown Bears ◽  
Tissue Samples ◽  
Breeding Seasons

Adult male brown bears (Ursus arctos Linnaeus, 1758) display tree-marking behavior to chemically signal their dominance throughout the nondenning period, and this behavior peaks during the breeding season. Within the scent-marking sequence, back rub is a core marking posture. The present study investigated (i) seasonal changes in sebaceous glands in the back skin of brown bears and (ii) the relationship between those changes and testosterone levels. Back skin tissue samples and blood were collected from captive adult intact and castrated males during prebreeding, transitional, breeding, and postbreeding seasons, which were concurrent with back skin observations. In intact males, during the transitional and breeding seasons, an oily secretion from the back skin was observed along with enlarged sebaceous glands. The plasma testosterone concentrations during the transitional and breeding seasons were increased compared with the pre- and post-breeding seasons. Secretions and enlarged sebaceous glands were not found in castrated males, and the plasma testosterone concentrations remained at baseline levels. Oily secretions of the back skin glands that appear more abundant during the breeding season are rubbed against trees. Changes in size and volume of sebaceous glands, and thus their secreting capacity, are likely testosterone-regulated.

Monitoring follicular dynamics using ultrasonography in captive brown bears (Ursus arctos) during the breeding season

2019 ◽  
Vol 140 ◽  
pp. 164-170
Author(s):  
Yoshiko Torii ◽  
Naoya Matsumoto ◽  
Hideyuki Sakamoto ◽  
Masashi Nagano ◽  
Seiji Katagiri ◽  
...  
Keyword(s):  
Breeding Season ◽  
Ursus Arctos ◽  
Brown Bears ◽  
Follicular Dynamics

Molecular identification of Taenia spp. in wolves (Canis lupus), brown bears (Ursus arctos) and cervids from North Europe and Alaska

2011 ◽  
Vol 60 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Antti Lavikainen ◽  
Sauli Laaksonen ◽  
Kimberlee Beckmen ◽  
Antti Oksanen ◽  
Marja Isomursu ◽  
...  
Keyword(s):  
Molecular Identification ◽  
Canis Lupus ◽  
Ursus Arctos ◽  
Brown Bears

scholarly journals Olfactory stimulation or inhibition of sexual behavior of stallions in non-breeding season

2018 ◽  
Vol 186 ◽  
pp. 1-9 ◽  
Author(s):  
Daniel Guillaume ◽  
Chantal Moussu ◽  
Frédéric de Geoffroy ◽  
Didier Chesneau ◽  
Matthieu Keller
Keyword(s):  
Sexual Behavior ◽  
Breeding Season ◽  
Olfactory Stimulation

scholarly journals Long-Term Safety of Intraperitoneal Radio Transmitter Implants in Brown Bears (Ursus arctos)

2018 ◽  
Vol 5 ◽  
Author(s):  
Jon M. Arnemo ◽  
Bjørnar Ytrehus ◽  
Knut Madslien ◽  
Jonas Malmsten ◽  
Sven Brunberg ◽  
...  
Keyword(s):  
Ursus Arctos ◽  
Brown Bears ◽  
Radio Transmitter

Sexing free-ranging brown bears Ursus arctos using hairs found in the field

1993 ◽  
Vol 2 (6) ◽  
pp. 399-403 ◽  
Author(s):  
P. TABERLET ◽  
H. MATTOCK ◽  
C. DUBOIS-PAGANON ◽  
J. BOUVET
Keyword(s):  
Ursus Arctos ◽  
Brown Bears ◽  
Free Ranging

Serologic Evidence of Leptospira spp. Serovars in Brown Bears (Ursus arctos) from Croatia

2010 ◽  
Vol 46 (1) ◽  
pp. 251-256 ◽  
Author(s):  
Alen Slavica ◽  
Dean Konjević ◽  
Đuro Huber ◽  
Zoran Milas ◽  
Nenad Turk ◽  
...  
Keyword(s):  
Ursus Arctos ◽  
Brown Bears ◽  
Leptospira Spp ◽  
Serologic Evidence
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