Ciclo de vida

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  • Publicado : 25 de abril de 2011
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LIFECYCLE
Chinese white dolphins can live up to 40 years. The females are ready for mating at an earlier age, about 10 years. It can give one birth every 3 years. It will take 10 months for themother dolphin to give birth and only one each time. The newborn dolphin calf is almost 1 meter long. A calf is born with tail first to prevent the calf of being choked to death. Generally a baby willstay with the mother until it is about three years of age. It stays close to its mother to learn swimming and hunting
Threats
* Direct catch
* By-catches(誤捕)
* Mass strandings(大量擱淺)
*Habitat degradation
* Pollution of the water
* Collide with ships frequently

Lifecycle
The Chinese white dolphin will change its color while growing up. People tend to divide its life intosix phases according to its body color, which are the unspotted calf (UC, uniform black to dark gray), unspotted juvenile (UJ, uniform light gray), mottled (SJ, light pinkish grey), speckled (SS,pale pink to white), speckled adult (SA, grey spotted), unspotted adult (UA, purely pink to white).

Chinese white dolphins can live up to 40 years. It can give one birth every 3 years. Similar tohumans, it will take 10 months for the mother dolphin to give birth and only one each time. The newborn dolphin calf is almost 1 meter long. A calf is born with tail first (Terrestrial mammals are bornwith head first) to prevent the calf of being choked to death. Calf stays close to its mother to learn swimming and hunting.

The playful and nimble Chinese white dolphins love to ride on the wave.However, no specific rule is found for its diving. Chinese white dolphins usually live in a group smaller than ten but sometimes travel in a larger group than ten.


Threats
The Chinese whitedolphins in the Pearl River estuary are facing many threats.

The Pearl River estuary is one of the busiest maritime areas around the world. It is full with numerous vessels. The vessel propellers...
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