A mammal of the carnivora family, Canidae. It is the oldest domesticated animal, and several species existed in the late Paleolithic period. Its ancestors are said to be similar to dingoes and pariah dogs that live in tropical Asia from North Africa, and in some areas, it seems that they were crossbred with wolves. Many have a keen sense of smell and follow the scent of their prey to find it, but there are also breeds that hunt by sight. Their body structure is suitable for running long distances and they have strong endurance. They are gregarious and omnivorous, but they mainly feed on animal matter. In most breeds, the gestation period is 63 days, and the young reach sexual maturity at 6 to 9 months, and become old at 12 years old. They sometimes live to be 20 years old. They are intelligent and obedient. There are many breeds, with more than 400 varieties. They come in a variety of sizes, shapes, hair lengths, and colors. The smallest Chihuahua weighs less than 1 kg and stands 13 cm tall at the shoulder, while the St. Bernard weighs 80 to 90 kg and stands 70 cm tall at the shoulder. The categorization by purpose is as follows (shoulder height in parentheses, in cm). [Bird hunting dogs] Setter (64), Pointer (64), German Pointer (60), Cocker Spaniel (38), Weimaraner (64), etc. [Game hunting dogs] Borzoi (72), Greyhound (71), Beagle (35), Afghan Hound (70), Dachshund (23), Shiba Inu (39), etc. [Working dogs] German Shepherd (61), Collie (56), Boxer (58), Doberman Pinscher (69), Great Dane (76), St. Bernard (70), Shetland Sheepdog (36), Fox Terrier (42), etc. [Pets] Chihuahua (13), Poodle (Standard type 38 or above), Chin (25), etc. [Non-hunting dogs] Bulldog (39), Dalmatian (60), Chow Chow (50), Spitz (32), Akita (64), etc. → Japanese dogs → Related topics Livestock | Hunting dogs Source : Heibonsha Encyclopedia About MyPedia Information |
食肉目イヌ科の哺乳(ほにゅう)類。家畜中で最も歴史が古く,旧石器時代後期すでに数種類があった。祖先はディンゴや北アフリカからアジアの熱帯にすむパリア犬に近いものといわれ,地方によってはオオカミとの交配も行われたらしい。嗅覚が鋭く,臭跡をたどって獲物を捜し出すものが多いが,視覚にたよって猟をする品種もある。体の構造は長距離を走るのに適し,耐久力が強い。群居性,雑食性だが,動物質が主。妊娠期間は多くの品種で63日,子は6〜9ヵ月で性的に成熟,12歳で老犬。ときに20歳まで生きる。りこうで従順。品種は非常に多く400種以上になるという。大きさ,形,毛の長さや色などはさまざまである。最小のチワワは体重1kg以下で肩高13cm,セント・バーナードでは体重80〜90kg,肩高70cmに達する。用途別に分けると次のようになる(括弧内は肩高,単位cm)。〔鳥猟犬〕 セッター(64),ポインター(64),ジャーマンポインター(60),コッカスパニエル(38),ワイマラナー(64)など。〔獣猟犬〕 ボルゾイ(72),グレーハウンド(71),ビーグル(35),アフガンハウンド(70),ダックスフント(23),柴犬(39)など。〔使役犬〕 シェパード(61),コリー(56),ボクサー(58),ドーベルマンピンシェル(69),グレートデン(76),セントバーナード(70),シェトランドシープドッグ(36),フォックステリア(42)など。〔愛がん用〕 チワワ(13),プードル(スタンダード型38以上),チン(25)など。〔非猟犬〕 ブルドッグ(39),ダルメシアン(60),チャウチャウ(50),スピッツ(32),秋田犬(64)など。→日本犬 →関連項目家畜|猟犬 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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