File:Gharial_(Gavialis_gangeticus)_male.jpg · Wikimedia Commons · See Wikimedia Commons
Also known as gavial, fish-eating crocodile, ghurial, ghurrial, ghuryal, gharrial, Gavialis gangeticus
The gharial (Gavialis gangeticus), also known as gavial or fish-eating crocodile, is a crocodilian in the family Gavialidae and among the longest of all living crocodilians. Mature females are long, and males . Adult males have a distinct boss at the end of the snout, which resembles an earthenware pot known as a ghara, hence the name "gharial". The gharial is well adapted to catching fish because of its long, narrow snout and 110 sharp, interlocking teeth.
The gharial is a long, fish-eating crocodilian found in the family Gavialidae, recognizable by its distinctively long, narrow snout and sharp interlocking teeth that make it highly specialized for catching fish. Named after a pot-shaped structure on males' snouts, gharials are among the longest living crocodilians today.
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Species
二名法 Gavialis gangeticus(Gmelin, 1789) 頭部 恆河鱷(學名:Gavialis gangeticus),又名食魚鱷、長吻鱷,是長吻鱷科恆河鱷屬中的唯一物種。恆河鱷身體修長,體色為橄欖綠色。在IUCN紅色名錄上被列為極危物種。 目录 1 分佈 2 生活習性 3 繁殖動向 4 保育現狀 5 參考資料 6 參見 7 參考文獻 分佈 恆河鱷是一種淡水鱷魚,主要分佈於印度河、恆河、馬哈拉迪河及布拉瑪普特拉河這4條河當中,以前於孟加拉也有,但現在已於當地絕種。恆河鱷喜歡棲息於水流又急又深,水質較好的河裏。 生活習性 在所有鱷魚中,恆河鱷能在水中的時間最長,達到1個小時以上,因此爬上陸地後,無法像其他鱷魚般用四肢平穩爬行。恆河鱷因顎部過幼過窄而欠缺獵捕大型獵物的咬合力,因此以魚類為主食。雖然恆河鱷是世界上最長的鱷魚之一,但未有傳出吃人事件。 繁殖動向 恆河鱷於每年3月至4月生蛋,於河岸沙地挖洞築巢,每次生30至50隻蛋,而所生的蛋亦是所有鱷魚當中最大的。 雌鱷守著鱷魚巢時,會變得有點攻擊性,是一種警戒心非常強的鱷魚。與其他鱷魚不同,牠們的口不大,未能載著小鱷魚,所以孵出小鱷魚後,雌鱷會引導小鱷魚到水邊。恆河鱷在大約8至12歲時到達性成熟期,屆時體長超過3米長。 保育現狀 恆河鱷與其他鱷魚一樣,因為身上的皮是製造皮件的原料而遭到捕殺,數量急劇減少。尼泊爾與印度近年來推動保育有關鱷魚的計劃,現已重新建立恆河鱷的族群數目。 聖地牙哥動物園的雄性恆河鱷 雄性恆河鱷近攝 參考資料 《自然珍藏系列:兩生爬行類圖鑑》ISBN 957-469-519-0 《牛頓雜誌》第238期,2003年6月號
via IUCN
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The gharial (Gavialis gangeticus), also known as gavial or fish-eating crocodile, is a crocodilian in the family Gavialidae and among the longest of all living crocodilians. Mature females are long, and males . Adult males have a distinct boss at the end of the snout, which resembles an earthenware pot known as a ghara, hence the name "gharial". The gharial is well adapted to catching fish because of its long, narrow snout and 110 sharp, interlocking teeth.
The gharial probably evolved in the northern Indian subcontinent. Fossil gharial remains were excavated in Pliocene deposits in the Sivalik Hills and the Narmada River valley. It currently inhabits rivers in the plains of the northern part of the Indian subcontinent. It is the most thoroughly aquatic crocodilian, and leaves the water only for basking and building nests on moist sandbanks. Adults mate at the end of the cold season. Females congregate in spring to dig nests, in which they lay 20–95 eggs. They guard the nests and the young, which hatch before the onset of the monsoon. The hatchlings stay and forage in shallow water during their first year, but move to sites with deeper water as they grow.
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