Hippophile No.49
第24回学術集会 シンポジウム「最近の馬生産事情を知ろう!」
座長 井上裕士 田谷一善
24rd Scientific Sessions Symposium ‘Let's Learn the Recent Topics about Horse Breeding!’
Chairman Yuji INOUE Kazuyoshi TAYA
基調招待講演 Keynote Invited Lecture
米国のウマ繁殖の現状と課題 Michelle M. LeBlanc
The Current State of the Breeding Industry in Florida and Kentucky
Michelle M. LeBlanc
講演 Lecture
(1)栄養管理指導と生産性の向上を目指して
Gaining Productivity of Racehorses by Dietary Management for Mares
朝井 洋
Yo ASAI
(2)サラブレッド生産における種雄馬の変遷
The History of Stallions in Thoroughbred Breeding
中西信吾
Shingo NAKANISHI
(3)重輓馬の歴史と生産
The History and Production of Heavy Draft Horses
石井三都夫
Mitsuo ISHII
(4)わが国におけるサラブレッド生産の現状と展望
Thoroughbred Breeding in Japan:Present Condition and Prospects
南保泰雄
Yasuo NAMBO
総合討論 Discussions
特別記事 Special Article
日本ウマ科学会第4回馬臨床獣医師ワーキンググループ症例検討会・講演会・実習について
The Japanese Society of Equine Science The 4th Equine Veterinarians Working
Group's Case Discussion Forum, Invited Lecture, and Workshop
南保泰雄 井上裕士 佐々木直樹
Yasuo NAMBO Yuji INOUE Naoki SASAKI
お知らせ Information
第25回日本ウマ科学会学術集会のお知らせ
Information of The 25th Japanese Society of Equine Science Annual Meeting
Journal of Equine Science Vol.22, No.2, June 2011 和文要約
Japanese Summary
お詫びと訂正
An Apology and Correction
協賛団体名・賛助会員名簿
Groups Sponsor・Supporting Member
Hippophile 投稿規程
Submissiom Rules
編集後記
Editor's Note
最近の日本での国民的騒動に原子力発電の問題があります。特に感じることは,事業主と
政治家あるいは行政担当者と科学者・研究者間の意思の疎通や信頼関係の無さです。我々馬
関係者も他山の石としてではなく肝に銘じて置きたいものです。そんな意味合いから,昨年
開催されたシンポジウム『最近の馬生産事情を知ろう!』を特集しました。シンポジウムの
目的は,過去の国内の馬生産を検証,米国の生産状況と比較検討し,最近の混沌としている
わが国の生産事情の将来の方向性を探ろうとするものです。
先ずDr. Michelle M. LeBlanc の『米国のウマ繁殖の現状と課題』と題した基調招待講
演から始まりました。アメリカにおけるサラブレッドの生産は,全体的に規模の縮小が見ら
れているそうです。特に大打撃はフロリダとカリフォルニアでの育成産業です。縮小理由に
(1)長期にわたる不況,(2)競馬のイメージ悪化(薬物使用),(3)過剰生産(馬の屠殺禁止)
,(4)高額な種付け料,(5)ギャンブルとしての競馬人気の低落,(6)馬生産地の環境要因と
生産育成障害(呼吸器疾患,馬のメタボリックシンドロームによる疾患,土質に関連する蹄
骨骨折,下痢,毛虫による流産,駆虫薬の薬剤耐性(イベルメクチン))などを挙げていま
す。しかし,最近は産業悪化による規模縮小や疾患が原因で,全体的に生産頭数が減少し,
病気の減少,種付け料の減額が行われ,高品質馬の売買へと好転を示しつつあるということ
です。
シンポジストとして朝井 洋氏の『栄養管理指導と生産性の向上を目指して』は,今まで
「経験と勘」で行っていた栄養管理を,1998年発刊の軽種馬飼養標準(ボディコンディショ
ンスコア)の利用や,栄養指導者の育成によって発育を向上させ,生産性の向上が図られて
います。中西信吾氏の『サラブレッド生産における種雄馬の変遷』は,わが国の軽種馬の種
雄馬資質向上の中核的役割を担っている日本軽種馬協会(JBBA)の事業内容を紹介したもの
です。JBBA では創立以来51頭を供用しており,最近の内国産種雄馬の資質の向上と飼養管
理を徹底してきました。またシャトルスタリオンの活躍で,過去に言われてきた“日本はサ
ラブレッドの墓場”を払拭しつつあります。石井三都夫氏の『重輓馬の歴史と生産』は,重
輓馬の変遷を,一番古い祖先,エオヒップスから説明しています。また戦時中には,日本で
改良して作られた品種として初めて,日本釧路種を誕生させました。日本唯一の輓曳競馬は
敗戦後1945 年に始まり現在細々と行われています。最近は馬価格の低落,輸入肉用馬の増
加などから将来の重種馬の生きる道を模索しています。南保泰雄氏の『わが国におけるサラ
ブレッド生産の現状と展望』は,先人達が1982年から開始してきた生産地疾病等調査研究
を足掛かりに,健康で丈夫な子馬生産のための研究や獣医技術の向上について発表していま
す。現在では繁殖の調査研究が行われており,早期胚死滅,流産,難産の対応策として栄養
・分娩管理,胎仔の超音波診断方法の開発等々が行われ,得られた成績・成果で生産基盤の
強化に努力しているということです。特別記事の南保泰雄氏らの『第4回馬臨床獣医師ワー
キンググループ症例検討会・講演会・実習について』では,昨年の学会で行われた
Dr. Michelle M. LeBlanc の内容などを記しました。
(編集委員長 兼子樹廣)
One source of national unrest these days in Japan is the issue of nuclear power generation.
What is particularly noticeable is the lack of communication and trust relations between
business owners and politicians or government officials and scientists and researchers.
Those of us involved with horses should draw a lesson from that and be fully aware of it.
With that in mind, we have featured the symposium held last year entitled ”Let’s Learn the
Recent Topics about Horse Breeding!” The goal of the symposium was to look into past
Japanese horse breeding, compare it to the breeding situation in the US, and explore
the future direction of Japan’s recently chaotic breeding situation.
We started with the keynote guest lecture given by Dr. Michelle M. LeBlanc and entitled
“The Current State of the Breeding Industry in Florida and Kentucky.” Apparently
thoroughbred production in the US is experiencing a contraction in size, with the
production industries in Florida and California suffering a particularly harsh blow.
LeBlanc lists some of the reasons for the contraction as (1) the long-term recession,
(2) a deteriorating image of horse-racing (drug use), (3)overproduction (prohibition
on slaughtering horses), (4)expensive stud fees, (5)a decline in the popularity of
horse-racing as a form of gambling, and (6) environmental factors in horse production
areas and obstacles to breeding and rearing (respiratory disease, diseases caused by
metabolic syndrome in horses, hoofbone fractures associated with soil properties,
diarrhea, miscarriages caused by caterpillars, drug resistance to anthelmintic drugs
(ivermectin)). However, due to factors such as disease and the contraction caused by
the recent downturn in the industry, the number of horses produced has decreased overall,
leading to a decrease in disease and a reduction in stud fees, which LeBlanc says
indicate a gradual and favorable turn toward sales of higher quality horses.
In “Gaining Productivity of Racehorses by Dietary Management for Mares,
” Yo ASAI describes how dietary management, based until recently on experience and
intuition, is being changed through things like the use of the “body condition score,
” which came out in 1998, and the training of dieticians, thereby improving growth and
increasing productivity. “The History of Stallions in Thoroughbred Breeding” by
Shingo NAKANISHI provides an introduction to the work of the Japan Bloodhorse Breeders
Association (JBBA), which plays a key role in improving the stallion credentials of
Japanese thoroughbreds. JBBA has provided 51 horses since its founding, and it has
improved the credentials of recent domestically produced stallions and thoroughly
managed their feeding. Also, by employing shuttle stallions, it is dispelling Japan’s former
image as a “graveyard for thoroughbreds.” In “The History and Production of Heavy Draft
Horses,” Mitsuo ISHII explains the transformations in heavy draft horses, beginning
with the oldest ancestor, eohippus. He says the Japanese Kushiro breed was first produced
during wartime, as an improved breed developed in Japan. The only Ban-ei horseracing
in Japan began after the war defeat in 1945 and is currently carried out only on a very
limited scale. And in light of recent factors such as the decline in horse prices and the
increase in horses imported for meat, Ishii explores ways for heavy draft horses to survive
in the future. Yasuo NAMBO’s “Thoroughbred Breeding in Japan: Present Condition
and Prospects” reports on improvements in veterinary techniques and research aimed
at healthy, strong foal production, building on Investigative Research on Breeding Areas
and Diseases, etc. begun by predecessors in 1982. He says that investigative research is
currently being conducted on procreation, and that things like diet and foaling management
and fetal ultrasound diagnostic procedures are being developed as countermeasures for early
embryonic death, miscarriage, and difficult delivery. In turn, the results and findings
obtained from that research and development work are being utilized to strengthen
the production base. And a special article byNaoki SASAKI et al., “The Japanese Society
of Equine Science, The 4th Equine Veterinarians Working Group’s Case Discussion Forum,
Invited Lecture, and Workshop,” describes the content presented by Dr. Michelle M. LeBlanc
at the symposium held last year.
Editor-in-Chief, Dr. Mikihiro KANEKO