Nellie
Published on Nov 19, 2015
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Marineland Dolphin Adventure announced today the passing of Atlantic bottlenose dolphin Nellie, the longest-lived dolphin in human care.
Photo by Phil Manker
She inspired millions of guests to care about dolphins and understand their challenges in the wild. Nellie quickly became a local celebrity at Marineland. At the dawn of the television era in the 1950’s, Nellie starred in several TV shows filmed at Marineland’s original dolphin stadium.
The major divisions of the worlds oceans is the Pacific, Atlantic, Indian, Antarctic and Arctic Oceans.
Bottlenose dolphins are found in temperate waters throughout the world. The Atlantic bottlenose dolphin can be found throughout the temperate, tropical and sub-tropical waters of the Atlantic Ocean.
Sonar is simply making use of an echo. When an animal or machine makes a noise, it sends sound waves into the environment around it.
Those waves bounce off nearby objects, and some of them reflect back to the object that made the noise.
Dolphin sonar or echolocation is one way that these marine mammals communicate with one another, but it is also their operative system to locate objects that are far away from them.
This is a cute little dolphin swimmin'.
Photo by Leo Reynolds
Because marine mammals are at the top of their food chain, the toxins in their food sources accumulates in their bodies, especially in their fatty tissues and breast milk. Toxins in plankton are consumed by small fish, which are in turn eaten by larger fish, which are eaten by even larger fish. Eventually marine mammals and humans, each higher up the food chain, eat the now-toxic fish, further concentrating the toxins. This bio-concentration is what causes high levels of toxins in dolphins, whales, and other marine mammals. Nine of the 10 species with the highest polychlorinated biphenyl (PCB) levels are marine mammals.
Toxic top Five
- Bottlenose Dolphin
- Orca
- Risso's Dolphin
- Harbor Seal
- Beluga
Zones of the ocean
- Sunlit zone - This is the top layer, nearest the surface.
- Twilight zone - Only a small amount of light can penetrate the water at this depth.
- Midnight zone - Ninety percent of the ocean is in the midnight zone.
Dolphins live in the sunlit zone with 90% of the other marine life.
Photo by T. Zumbiehl
