Dusky Dolphin

 

Animal Unique | Dusky Dolphin | Dusky dolphin is a dolphin found in coastal waters in the southern hemisphere. The specific epithet is Latin for "dark" or "dim". It is very closely related genetically to the Pacific white-sided dolphin, but the current scientific consensus is that they are different. The Dusky dolphin prefers cool streams and coastal waters, but can also be found offshore. The dolphin series is patchy, with large populations in South America, southwest Africa, New Zealand and various oceanic islands with few sightings around southern Australia and Tasmania.

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Subclass:     Eutheria
Order:     Cetacea
Suborder:     Odontoceti
Family:     Delphinidae
Genus:     Lagenorhynchus
Species:     L. obscurus

The Dusky dolphin is small to medium in length compared to other species in the family. There is great variation in size between the different population areas. The back of the Dusky dolphin is dark gray or black, and the dorsal fin is striking two-tone-the leading edge matches the back in color, but the trailing edge has a much lighter gray white. Dusky dolphins have a long, light gray stain on its front leads to a short, dark gray bill. The throat and belly are white, and the beak and lower jaw are dark gray. There are two blazes of white color goes back to the body of the dorsal fin to the tail. Right between the white areas remains a characteristic thorn-shaped spot of dark color, so the species can be easily recognized.

Apart from that, Dusky dolphins can be confused with other members of their family when observed at sea. It can be distinguished from the common dolphin, which is a more prominent and longer beak and yellow markings have flank. The skull of a black dolphin has a longer and narrower rostrum than that of an hourglass dolphin Peale's dolphin, or of the same age and size. Dusky dolphins are seen diving in groups and individually. Dusky dolphins are a curious species, they bow to ride and seem to enjoy contact with boats and people. They are very agile swimmers and are known for their acrobatics.

Dusky dolphins prey consume a variety of fish and squid species. Common species are eaten anchovies, lantern fish, sardines, sculpin, hake, horse mackerel, hoki and red cod. They tend to coordinate hunters. These dolphins have a highly flexible foraging strategies that can change depending on the environment. He dolphins use their echolocation to detect and isolate an individual prey. Groups of foraging Dusky dolphins tend to increase when the layer is close to the surface and when it falls down.

In general, three different types of sounds produced by dolphins (and other toothed whales). These are the trains, providing a range of single clicks, usually broadband signals with fast rise time, burst pulses, which are individual clicks, which repetition is so high that they are heard by people just like a buzzing sound and bubbles , which are pure-tone, narrow-band frequency modulated signals, which varies in frequency with time. Dusky dolphins are included for all three sounds, but mostly to burst pulses.Whistling is more common in dark dolphins mixed with other species such as dolphins, common dolphins. Dusky dolphins broadband project short duration echolocation signals similar to those of other whistle-producing toothed whales.

Dusky dolphins are popular attractions for whale-watching tours. Dusky dolphins performing a number of aerial displays. Displays include jumps, back laps, laps head, tail laps, spins and nose outs. The Dusky dolphin also perform head-to-tail jumps is considered the most "acrobatic" of the displays. For about a re-entry is performed when a dolphin jumps out of the water and then arches his back and flips the tail strongly over a re-entry to make. In "fuck", it does expect the same movement snout and tail do not leave the water and the dolphin is curvature

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