| 摘要: |
| 根据捕自广西北海市近海的5头儒艮(3雌2雄)标本详细描述。中国近海产的儒艮体长221cm~293cm,最大体重455kg。椎式为C7+T18-19+L5+Ca25-29=55-60。指式(不包括掌骨)为Ⅰ1,Ⅱ3,Ⅲ3,Ⅳ3,Ⅴ2。 |
| 关键词: 儒艮 形态 骨骼 |
| DOI： |
| 投稿时间：1997-12-19 |
| 基金项目: |
|
| Studies on the Skeleton of Dugong from the Off-shore of China |
|
Sun Jianyun
|
| (Beihai Museum of Fisheries, Beihai, 536000) |
| Abstract: |
The paper in detail descriptes the external feature,skeleton of the dugong (Dugong dugong) from off-shore of China.
It is based on five specimens (3♀ 2♂) caught from Beihai off shore of Guangxi.The body length is 2.21 m~2.93 m,the maximum weight is about 455 kg.There are two incisors out of the mouth, male has a big cirrus,female has a pair of breasts behind the flipper.The body are black-grey.
The characteristics of external feature and skeleton are indicated in plates Ⅰ-Ⅱ,and the measurements given in tables 1~6. The vertebral formula of the specimen from Beihai is C7+T18-19+L5+Ca25-29=55-60.Flippers have five fingers,and the phalangeal formula is Ⅰ1,Ⅱ3,Ⅲ3,Ⅳ3,Ⅴ2.There is a trace of hind-leg bones remained.
This species is found mostly along the coast of Guangxi and western Guangdong,and distributes within 20 m of the seabeach.
They are progenitive throughout the year.Usually they give a birth every three years,with 400 days incubation period. |
| Key words: Dugong dugong externality skeleton |
