Effects of environmental radiation on testes and spermatogenesis in wild large Japanese field mice (Apodemus speciosus) from Fukushima

Tsukasa OKANO, Hiroko Ishiniwa, Manabu Onuma, +3

Scientific Reports

Characteristics of Frozen-Thawed Spermatozoa Cryopreserved with Different Concentrations of Glycerol in Captive Japanese Black Bears (Ursus thibetanus japonicus)

Tsukasa OKANO, Sachiko Nakamura, Takeshi Komatsu, +4

Journal of Veterinary Medical Science

FertilitySuitable Glycerol ConcentrationSemen AnalysisReproductive BiologyFrozen-thawed Spermatozoa Cryopreserved +14

Annual Changes in Serum Leptin Concentration in the Adult Female Japanese Black Bear (Ursus thibetanus japonicus)

Toshio Tsubota, Miho Sato, Tsukasa OKANO, +5

Journal of Veterinary Medical Science

Mammalian PhysiologyImmunologyVeterinary ResearchEducationLaboratory Animal Study +17

Incidence of Ovulation without Coital Stimuli in Captive Japanese Black Bears (Urus thibetanus japonicus) based on Serum Progesterone Profiles

Tsukasa OKANO, Sachiko Nakamura, Rumiko Nakashita, +4

Journal of Veterinary Medical Science

FertilityReproductive HealthGynecologyReproductive BiologyCoital Stimuli +22

Effects of Final Dilution Rate, Sperm Concentration and Times for Cooling and Glycerol Equilibration on Post-Thaw Characteristics of Canine Spermatozoa

Tsukasa OKANO, Tetsuma MURASE, Makoto Asano, +1

Journal of Veterinary Medical Science

Spermatogenesis, Serum Testosterone Levels and Immunolocalization of Steroidogenic Enzymes in the Wild Male Japanese Black Bear (Ursus thibetanus japonicus)

Tsukasa OKANO, Tetsuma MURASE, Toshio Tsubota

Journal of Veterinary Medical Science

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)

Sachiko Nakamura, Tsukasa OKANO, Haruki Shibata, +6

Canadian Journal of Zoology

Comparative EndocrinologyMammalian PhysiologyReproductive BiologyAdipokinesReproductive Endocrinology +21

Electroejaculation and Semen Cryopreservation of Free-Ranging Japanese Black Bears (Ursus thibetanus japonicus)

Tsukasa OKANO, Tetsuma MURASE, Toshio Tsubota

Journal of Veterinary Medical Science

Molar excess volumes, isentropic compressions, and isobaric heat capacities of methanol – isomeric butanol systems at 298.15 K

Tsukasa OKANO, Hideo Ogawa, Sachio Murakami

Canadian Journal of Chemistry

EngineeringIsobaric Heat CapacitiesMethanolExperimental ThermodynamicsChemistry +17

Characteristics of captive Japanese black bears (Ursus thibetanus japonicus) semen collected by electroejaculation with different voltages for stimulation and frozen-thawed under different conditions

Tsukasa OKANO, Tetsuma MURASE, C. Yayota, +4

Animal Reproduction Science

Animal PhysiologyAnimal ReproductionReproductive SuccessFertilityAnimal Science +9