Pearl River Delta Dolphin 1 Hongkong Walbeobachtung
Many translated example sentences containing "Chinese river dolphin" – German-English the Mainland Chinese economy especially the Pearl River Delta. Many translated example sentences containing "Yangtze river dolphin" Shanghai and along the banks of the Yangtze, and in the Pearl River Delta to the south. Viele übersetzte Beispielsätze mit "pink river dolphin" – Deutsch-Englisch the rare Chinese white dolphins, which here in the Pearl River delta are pale pink. Hong Kong, Pearl River Delta. Tin Can Bay; Cute Indopazifik Buckelwale dolphin (Sousa chinensis), oder Rosa Delfin, oder Chinesische Weiße Delphin spielt. Hong Kong, Pearl River Delta. Indopazifik Buckelwale dolphin (Sousa chinensis) mit Schiff im Hintergrund, Tai O, Lantau Island, Hong Kong, China.
Thanks to freshwater run-off from the Pearl River, the nutrient-rich waters create water traffic closely controlled, Hong Kong Dolphinwatch runs boat trips every. Hong Kong, Pearl River Delta. Indopazifik Buckelwale dolphin (Sousa chinensis) mit Schiff im Hintergrund, Tai O, Lantau Island, Hong Kong, China. Sehen Sie die verspielten rosa Delfine Hongkongs hautnah auf dieser unterhaltsamen Kreuzfahrt durch das Pearl River Delta. Ihr englischsprachiger.
At the same, the North and the West of Hong Kong are not any safer, as they are afflicted by land reclamation, marine traffic and pollution.
As a result, the entire population could die out if the dolphins were forced to leave the region. Today, the dolphin population of Hong Kong is in steep decline and will continue to decrease if the third runway project will take place at Hong Kong International Airport.
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Sonny Lo Shiu Hing. Anthropogenic pollutants pose a risk to marine mammals that reside in coastal waters. Discharge of organic pollutants into marine environments has been shown to decrease water quality resulting in loss of habitats and a significant reduction in the species richness Johnston and Roberts, The consumption of plastics have adverse effects in marine mammals such as disease susceptibility, reproductive and developmental toxicity.
If the dolphin is not consuming plastic directly then it can have plastic pollutants ingested though biomagnification and bioaccumulation.
Bioaccumulation is defined as the uptake of chemicals from the environment through dietary intake, dermal absorption or respiratory transport in air or water.
This is a huge factor is plastic toxicity consumption in this species due to them having long lifespans which makes them susceptible to chronic exposure.
Also, they contain a large quantity of blubber, lipids , which can result in an excess of toxicity storage in their tissues. Echolocation is a main sense that all dolphins use to navigate and pinpoint prey and predators.
Dolphins and whales use echolocation by bouncing high-pitched clicking sounds off underwater objects , similar to shouting and listening for echoes.
The sounds are made by squeezing air through nasal passages near the blowhole. These sound-waves then pass into the forehead, where a big blob of fat called the melon focuses them into a beam.
This can become confusing and frustrating which can lead to extreme stress and potential health issues. Despite echolocation being mostly affected by noise pollution it can altered by pollutants in marine water.
Noise pollution can also be caused by large clusters of plastic debris; ocean gyre. The constant movement of ocean currents will cause the plastic debris, along with general-waste to clash together which entails a production of sound.
Sound waves from the debris will travel through marine waters which can become an excess of sound waves traveling can render their use of echolocation.
This can inherently leave this species blind since this is their primary sense. In Hong Kong, boat trips to visit the Indo-Pacific humpback dolphins have been running since the s.
A code of conduct regulates dolphin-watching activity in Hong Kong waters. There have been some reports of dolphin watching practices that have further endangered the Indo-Pacific humpback dolphins, such as in Sanniang Bay dolphin sanctuary in Qinzhou   and off Xiamen.
The phrase originates from the Cantonese fisher people, because they claim the dolphins eat the fish in their nets. The wu refers to the finless porpoises , which are black, and the bak , white, referring to Chinese river dolphins.
These two species often interrupt and ruin the fishermen's catch. As years passed, because "dolphin" sounds the same as "bad luck", the meaning of the phrase changed.
However, in Cantonese, wu refers to the calves of Chinese white dolphin and bak refers to the adults. The Indo-Pacific humpback dolphins were first discovered along the west coast of Taiwan in Taiwan is a densely populated island and highly developed area, which has many industrial development projects, especially along the west coast, where the ETS populations of Indo-Pacific humpback dolphins live.
Based on data collected between and , the ETS population of humpback dolphins was less than individuals. It means during those 7 years, population of humpback dolphins is being destroyed constantly and severely.
There are several facts that result in the decreasing number of ETS population of humpback dolphins.
First, large-scale modification of the shoreline by industrial development including hydraulic filling for creating industrial or science parks, seawall construction and sand mining cause habitat fragmentation and diminish dolphin's habitats.
In addition, exploitation of shoreline also contributes to toxic contamination flows into dolphin's habitats.
The chemical pollution from industrial or agricultural and municipal discharge results in impaired health of dolphins, for instance, reproductive disorders, and compromised immune system.
Second, fishing activities along the west coast of Taiwan are thriving, and cause many impacts on dolphins.
Widespread and intensive use of gillnets and vessel strikes are potential threats for dolphins.
Over exploitation of fish by fisheries' is another threat for the dolphin population. It has led to disturbance of marine food web or trophic level and reduces marine biodiversity.
Therefore, dolphins have not enough prey to live on. Still another problem is reduced amount of freshwater flows into estuaries from rivers.
Since ETS population of humpback dolphins is closely associated with estuaries habitat, the elimination of freshwater discharge from rivers significantly decreases the amount of suitable habitats for dolphins.
Hydroacoustic disturbance is another critical issue for dolphins. Sources of noise can come from dredging , pile driving , increased vessel traffic, seawall construction, and soil improvement.
For all cetaceans, sound is vital for providing information about their environment, communicating with other individuals, and foraging; also, they are very vulnerable and sensitive to the effects of noise.
Elevated anthropogenic sound level causes many dysfunctions of their behaviors, and even leads to death. In addition to threats from anthropogenic activities, dolphins are potentially at the risk due to the small population size, which may result in inbreeding and decreased genetic and demographic variability.
Finally, climate change causes more typhoons to hit the west coast of Taiwan and cause great disturbance to dolphins' habitats. It is listed on Appendix II  as it has an unfavourable conservation status or would benefit significantly from international co-operation organised by tailored agreements.
The population continues to be further threatened by pollution, vessel collision, overfishing, and underwater noise pollution.
In addition to their natural susceptibility to anthropogenic disturbances, the Chinese white dolphin's late sexual maturity, reduced fecundity, reduced calf survival, and long calving intervals heavily curtails their ability to naturally cope with elevated rates of mortality.
From Wikipedia, the free encyclopedia. Redirected from White Dolphin. Not to be confused with the Baiji Chinese river dolphin.
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Demography and population trends of the largest population of Indo-Pacific humpback dolphins. Biological Conservation , Hung, C.
An assessment of the risks associated with polychlorinated biphenyls found in the stomach contents of stranded Indo-Pacific Humpback Dolphins Sousa chinensis and Finless Porpoises Neophocaenaphocaenoides from Hong Kong waters Chemosphere 63, Jefferson, T.
Population biology of the Indo-Pacific hump-backed dolphin in Hong Kong waters. Wildlife Monographs , Strandings, mortality and morbidity of Indo-Pacific humpback dolphins in Hong Kong, with emphasis on the role of environmental contaminants.
Journal of Cetacean Research and Management 8, Marine Mammal Science 28, Protecting small cetaceans from coastal development: Impact assessment and mitigation experience in Hong Kong.
Marine Policy 33, Leung, C. Petroleum hydrocarbons, polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in tissues of Indo-Pacific humpback dolphins from south China waters Marine Pollution Bulletin 50, Wu, Y.
Science of the Total Environment , , The Project Ever-growing concerns about the loss of suitable habitat, the mortality of dolphins from entanglements and vessel strikes, and the possible effects of chemical, sewage, and noise pollution on dolphin health led the Ocean Park Conservation Foundation in Hong Kong OPCFHK to seek funding from the Hong Kong International Airport Environmental Fund for a major research and conservation planning initiative.
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The threats facing the Chinese white dolphins include overfishing, water pollution, heavy marine trafficking, and coastal development.
Adding to this lengthy list is the potential construction of a third runway at Hong Kong International Airport. He emphasized that if the construction takes place, dolphins could become so stressed and confused by the noise in the estuary that they would stop swimming away from noise sources, leading some observers to incorrectly assume that they were unbothered.South Asian river Beste App Ipad P. This article needs additional citations for verification. Sadly, nowadays the more common place to Zollsatz Elektronik the dolphins is inside an aquarium. Aquatic Mammals 30 1 Demography and population trends of the largest population of Indo-Pacific humpback dolphins. Caperea Pygmy right whale C. View Article Google Scholar Blockbuster Game. PloS ONE. Adv Mar Biol. Mature females can give birth every three years, and parental care lasts until their offspring can find food themselves. Wildlife Monographs