Journal of Equine Science最新文献

A case of a newborn Kiso native pony diagnosed with a median hard cleft palate and urachal hypoplasia.

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.25

Sakura Yoshida, Akiko Takeyama, Masaaki Tagami, Yuanzhi Gao, Munkhtuul Tsogtgerel, Yoshiyasu Kobayashi, Kenichi Watanabe, Yasuo Nambo

引用次数: 0

Effects of pre-exercise cooling in hot environments on performance and physiological responses in Thoroughbred horses.

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.19

Hajime Ohmura, Yusaku Ebisuda, Yuji Takahashi, Kazutaka Mukai

{"title":"Effects of pre-exercise cooling in hot environments on performance and physiological responses in Thoroughbred horses.","authors":"Hajime Ohmura, Yusaku Ebisuda, Yuji Takahashi, Kazutaka Mukai","doi":"10.1294/jes.36.19","DOIUrl":"10.1294/jes.36.19","url":null,"abstract":"Pre-exercise cooling may prevent exertional heat illness in horses. We hypothesized that pre-exercise cooling before warm-up in a hot environment would not affect performance but would mitigate reductions in body weight and increases in body temperature following exercise. Six trained Thoroughbred horses were studied using a randomized, crossover design with three pre-treatments: 30-min walk on a treadmill at 1.7 m/sec (WALK), 30 min of standing (REST), and a 10-min pre-cooling shower at 26.2 ± 0.8°C (SHOWER). All horses underwent each pre-treatment, followed by a warm-up and main exercise in a hot environment (wet-bulb globe temperature: 32-33°C). After warming up by cantering at 10.0 m/sec for 30 sec, horses exercised on a treadmill with a 6% incline and a speed eliciting exhaustion within 2 min, which was approximately 115% V̇O2max (relative intensity; 13.5-14.3 m/sec). Run time to exhaustion was recorded, with body weight measured before pre-treatment and after main exercise to calculate weight loss. Heart rate was measured from before pre-treatment to after the main exercise. Plasma lactate concentration (Lac) and pulmonary arterial temperature (a measure of body temperature) were assessed before and after pre-treatment and after the warm-up and main exercise. Weight loss in SHOWER was significantly reduced compared with the other treatments. Pulmonary artery temperatures in WALK after pre-treatment were significantly higher than in the other treatments. No significant differences were observed in heart rate, Lac, or run time. These results suggest that pre-cooling mitigates reductions in body weight and increases in body temperature without affecting performance.","PeriodicalId":35701,"journal":{"name":"Journal of Equine Science","volume":"36 1","pages":"19-23"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11919543/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143670092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genomic regions and candidate genes associated with forehead whorl positioning in Thoroughbred horses.

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.11

Tamu Yokomori, Teruaki Tozaki, Takao Segawa, Takuya Itou

{"title":"Genomic regions and candidate genes associated with forehead whorl positioning in Thoroughbred horses.","authors":"Tamu Yokomori, Teruaki Tozaki, Takao Segawa, Takuya Itou","doi":"10.1294/jes.36.11","DOIUrl":"10.1294/jes.36.11","url":null,"abstract":"Previous studies have examined the relationship between hair characteristics and temperament traits in various animals. A partial genetic association has been suggested in humans because whorl formation and neurological development occur simultaneously during the fetal period. In the horse industry, anecdotal evidence suggests a link between the forehead whorl position and temperament. In our previous study, the heritability of forehead whorl positioning was h2=0.653, indicating significant genetic contributions in thoroughbreds. Therefore, in this study, we designed a genome-wide association study using 192 Thoroughbred horses to detect candidate genes associated with forehead whorl positioning. The results revealed 11 suggestive markers on chromosomes 2, 14, 15, 19, and 26, although no significant markers were found. Five genes, namely PTTG1, CCNH, RASA1, COX7C, and CLDN1, located near these markers had functions related to skin cell or hair follicle development and temperament. Therefore, these genes may be involved in the positioning of the forehead whorl in Thoroughbreds. The candidate genes identified in this study are expected to contribute to elucidating the genetic factors behind forehead whorl in horses and to help interpret the common process of whorl and temperament development.","PeriodicalId":35701,"journal":{"name":"Journal of Equine Science","volume":"36 1","pages":"11-18"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11919545/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143671174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isolation and molecular identification of Lactobacillaceae bacteria and Bifidobacterium from horse feces. 从马粪便中分离乳酸菌和双歧杆菌并进行分子鉴定。

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.39

Riko Fujimoto, Momoka Kuchida, Tomomi Ban-Tokuda, Hiroki Matsui

引用次数: 0

Differences in serum iron concentrations between the summer and winter in Noma horses. 夏季和冬季野马血清铁浓度的差异。

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.1

Keiichi Hisaeda, Tetsushi Ono, Takako Shimokawa-Miyama, Akihisa Hata, Eri Iwata, Yasuharu Hiasa, Emi Ohzawa, Teruaki Tozaki, Harutaka Murase, Masaki Takasu, Naohito Nishii, Hitoshi Kitagawa

{"title":"Differences in serum iron concentrations between the summer and winter in Noma horses.","authors":"Keiichi Hisaeda, Tetsushi Ono, Takako Shimokawa-Miyama, Akihisa Hata, Eri Iwata, Yasuharu Hiasa, Emi Ohzawa, Teruaki Tozaki, Harutaka Murase, Masaki Takasu, Naohito Nishii, Hitoshi Kitagawa","doi":"10.1294/jes.36.1","DOIUrl":"10.1294/jes.36.1","url":null,"abstract":"We examined the differences in serum iron (Fe) concentrations and related variables between summer and winter in Noma horses. Blood samples were collected from 37 clinically normal horses seven consecutive times: September 2018, February 2019, October 2019, February 2020, September 2020, February 2021, and February 2022. Serum Fe concentrations ranged from 74 μg/dl to 316 μg/dl with a median of 176 μg/dl. The concentrations were lower in stallions compared with mares and geldings, tended to be low at 10-14 years of age, and then increased with age. Serum Fe concentrations were repeatedly low in summer and high in winter. Total iron-binding capacity (TIBC), Fe-saturation rate, hemoglobin (Hb), hematocrit (Ht), MCV, MCH, albumin, cholesterol, sodium (Na), potassium (K), chloride (Cl), and calcium (Ca) were lower in summer than in winter. However, creatinine, total protein, inorganic phosphorus, and Mg were higher in summer. The unsaturated iron-binding capacity, RBC count, blood urea nitrogen (BUN), glucose, and AST levels were not significantly different. Serum Fe concentrations were positively correlated with Hb, TIBC, Fe saturation rate, Ht, MCV, MCH, creatinine, albumin, glucose, cholesterol, AST, Na, Cl, and Ca, but negatively correlated with BUN and K. In Noma horses, serum Fe concentrations might be higher than the reference values for horses and consistently decrease in summer in parallel with Hb and MCV. The lowering of the serum Fe concentrations in summer may be due to a combination of the effects of Fe loss from sweating, dermatitis, insect bites, dietary composition, and/or unknown factors.","PeriodicalId":35701,"journal":{"name":"Journal of Equine Science","volume":"36 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11919544/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143671301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preoperative computed tomography imaging for accurate diagnosis and surgical planning in equine cranial disorders: two case reports of congenital malformations.

Journal of Equine Science Pub Date : 2025-01-01 Epub Date: 2025-03-10 DOI: 10.1294/jes.36.33

Takashi Yamaga, Masaaki Tagami, Akiko Takeyama, Fumiki Kato, Tsukasa Suzuki, Masayuki Tagami, Nao Tsuzuki

引用次数: 0

Rising trends of inbreeding in Japanese Thoroughbred horses. 日本纯血马近亲繁殖的上升趋势。

Journal of Equine Science Pub Date : 2024-12-01 Epub Date: 2024-12-12 DOI: 10.1294/jes.35.57

Momoko Watanabe, Fumio Sato, Hideki Innan

引用次数: 0

Assessment of horse behavior using an activity monitoring device used for cats and dogs. 使用用于猫和狗的活动监测装置评估马的行为。

Journal of Equine Science Pub Date : 2024-12-01 Epub Date: 2024-12-12 DOI: 10.1294/jes.35.47

Tatsuya Matsubara, Ryota Fukatsu, Makoto Yamamoto, Minami Moriya, Kazuki Hano, Kotono Nakamura, Yasunori Ohba, Masaki Takasu

{"title":"Assessment of horse behavior using an activity monitoring device used for cats and dogs.","authors":"Tatsuya Matsubara, Ryota Fukatsu, Makoto Yamamoto, Minami Moriya, Kazuki Hano, Kotono Nakamura, Yasunori Ohba, Masaki Takasu","doi":"10.1294/jes.35.47","DOIUrl":"10.1294/jes.35.47","url":null,"abstract":"Including Internet of Things (IoT) technology in horse-rearing management can potentially mitigate problems such as human resource shortages and time limitations in performing daily behavior monitoring. In this study, a small and inexpensive activity meter used to monitor dogs and cats (PLUS CYCLE®, JARMeC, Kanagawa, Japan) was used to monitor the daily behavior of horses. A study was performed to examine the suitability of the PLUS CYCLE® device for monitoring horses and to determine whether it could estimate horse behavior. The device was equipped with an accelerometer and was used to monitor Kiso horses in horse stalls and pastures after installing the devices at specific locations on headcollars and girths. The amount of activity from the accelerometer showed differences among the horses' behavioral types (lying, standing, walking, and feeding) in the stall, suggesting that it functions in horses. In the pasture, the amount of activity was correlated with GPS movement speed. Then, we tried to establish restricted cubic spline regression models to predict the locomotion speed in the pasture based on the amount of activity, but the prediction accuracy was low. This study showed that PLUS CYCLE® can be used to monitor horse activity amount during the daily management of individual horses. However, to achieve higher precision in monitoring detailed behaviors, additional investigation and data pertaining to the amount of activity for each horse during rearing in different environments are needed.","PeriodicalId":35701,"journal":{"name":"Journal of Equine Science","volume":"35 4","pages":"47-55"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11634534/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142819431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DNA barcoding of Anoplocephala perfoliata derived from a draft horse (Ban'ei horse) in Hokkaido, Japan. 对来自日本北海道一匹草马（Ban'ei 马）的 Anoplocephala perfoliata 进行 DNA 条形编码。

Journal of Equine Science Pub Date : 2024-10-01 Epub Date: 2024-10-11 DOI: 10.1294/jes.35.43

Mizuki Sasaki, Natsuko Fukumoto, Shinya Fukumoto

引用次数: 0

Total intravenous anesthesia with propofol-ketamine-xylazine with or without remifentanil in thoroughbred horses undergoing castration. 在接受阉割的纯血马中使用异丙酚-氯胺酮-恶嗪联合或不联合瑞芬太尼进行全静脉麻醉。

Journal of Equine Science Pub Date : 2024-10-01 Epub Date: 2024-10-11 DOI: 10.1294/jes.35.35

Tasuku Otsuka, Masanari Araki, Hiroshi Mita, Yoshinori Kambayashi, Eiru Yoshihara, Minoru Ohta

{"title":"Total intravenous anesthesia with propofol-ketamine-xylazine with or without remifentanil in thoroughbred horses undergoing castration.","authors":"Tasuku Otsuka, Masanari Araki, Hiroshi Mita, Yoshinori Kambayashi, Eiru Yoshihara, Minoru Ohta","doi":"10.1294/jes.35.35","DOIUrl":"https://doi.org/10.1294/jes.35.35","url":null,"abstract":"We evaluated the clinical efficacy of total intravenous anesthesia (TIVA) with propofol-ketamine-xylazine (PKX) with or without remifentanil for castration in horses. Twenty-four Thoroughbred horses were premedicated with intravenous (IV) xylazine (1.0 mg/kg) and midazolam (0.02 mg/kg) and anesthetized with IV ketamine (1.5 mg/kg) and propofol (1.0 mg/kg). Surgical anesthesia was maintained with constant infusion of propofol (3.0 mg/kg/hr)-ketamine (3.0 mg/kg/hr)-xylazine (1.0 mg/kg/hr) (group PKX: n=8), PKX combined with remifentanil (3.0 µg/kg/hr) (group PKXR3: n=8), or PKX combined with remifentanil (6.0 µg/kg/hr) (group PKXR6: n=8). During anesthesia, none of the horses showed any limb movements, but five, two, and two horses in the PKX, PKXR3, and PKXR6 groups, respectively, showed cremaster muscle contractions. One horse in the PKX group required doubling the PKX infusion rate to continue surgery. Adverse effects of remifentanil (trembling of the nose tip or tongue) were observed in one and three horses in the PKXR3 and PKXR6 groups, respectively. Heart rate and arterial blood pressure were well maintained in all groups. Ventilation was assisted in four, five, and six horses in the PKX, PKXR3, and PKXR6 groups, respectively. Recovery scores in the PKX group were fair in one horse, good in three horses, and excellent in four horses, whereas recovery in all horses in the PKXR3 and PKXR6 groups was judged to be excellent. TIVA with PKX combined with remifentanil 3.0 µg/kg/hr could provide more sufficient anesthetic depth than PKX with fewer clinically significant adverse effects than that with remifentanil 6.0 µg/kg/hr.","PeriodicalId":35701,"journal":{"name":"Journal of Equine Science","volume":"35 3","pages":"35-41"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11473122/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142476552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0