Ordinary gray shark

7 December, 2011


Ordinary gray shark (Glyphis glyphis) - A very rare and little-studied species of the family of gray sharks, found in fast-moving muddy waters, in the rivers of northern Australia,in Квинсленде and State of Northern Territory.Common gray shark can be found in rivers Uenlok, Dasi, Bizant, Normanbi, Hey, Embla, and in the rivers Adelaide and Ord in Western Australia.

As the name – common gray shark gray color reaching up to 2.5-3 meters in length, short and broad head and very small eyes, relatively large second dorsal fin, and on each of the pectoral fins in the tip of the black spot.

Ordinary gray shark different structure of their teeth, so the upper jaw teeth large, triangular and serrated edge across, and on the lower jaw - the narrow, Similar to spearhead, gear only at the very top.



Usually, The older gray shark, the closer to the sea it lives, average depth of navigation - 7,7 meters, midway between the bottom and the surface. Young and young gray sharks live only in waters with fast tidal currents and muddy bottoms.

Ordinary gray shark great hunt and fish feeds, shrimps and crustaceans.

Gray sharks are viviparous: embryo, exhausted their yolk sac, turns it into the placenta to be connected to the mother's body. Akulyata born in October-December, near the end of the dry season. At the birth of their length 50-59 cm, grow by about 19 cm per year.

This is a very rare species of sharks, The world no more 2500 adult gray shark, in each river, obviously, no more than 250. For a man this kind of gray sharks is not a threat.

Grey sharks are suffering from habitat destruction, fishing nets and fishing for sport fishing, classified as a species is in danger.




Latest entries:

Byron Bay tops the list of strange Australian trends

Forget about a month in Italy or a cruise to the Greek islands, We are [more]

Phased renovation of the apartment

Repairs are quite a long time, which is often [more]

Good bye, Western Australia, it was nice to know you, Part 2

And at some point., if Western Australia does not plan to stay [more]

Why western Australia is dead to tourism

Western Australia has always dreamed of secession. And if everything will be [more]

The best beaches in the Northern Territory: Ellery Creek, big hole, Ch.4

On the way back towards Alice Springs we stopped at the latter's place. [more]

Glen Helen Gorge on the Finke River, Ч3

The farthest of the reservoirs, that we visited, only half an hour away [more]

The best beaches in the Northern Territory: Ormiston Gorge, Ч2

  "Sometimes there are as many people here, like Bondi", - told us [more]

Byron Bay tops the list of strange Australian trends

Forget about a month in Italy or a cruise to the Greek islands, We are [more]

Самое популярное на сайте:
Latest entries:
Путешествуем на авто по Австралии: