Seals

There are 33 species of phocine today, farthest of which are known as seals and they are very graceless on land. The sealer can be found mostly on all continents of Earth, though nearly all species occur in cold-water ecology. They like to lie in the sun while resting on the beach.

seals in water

There are three types of seals family

  • Odobenidae
  • Otariidae
  • Phocidae

Where are Seals found?

The number of the flipper in the Wadden Sea region is documented. Scientists from Wageningen Marine Research, count the pinniped in the Dutch Wadden Sea from an airplane by taking photos on the sandbanks. One-third of the seals is underwater, so the scientists said that 30% to the total counted in order to reach a final estimation.

Grey seals are found mainly around the Scottish islands, along with the British east coast and also in Cornwall. In December 1999, there was an immature seal seen in the Thames beyond London. The colony of grey seals phocine was established in 1990 in the Dutch Wadden Sea. Since from last few years, it expands into the great colony in the entire Wadden Sea. A total of 4565 grey flipper was counted in the winter of 2017-2018. Huge groups are located in the west of Terschelling, but small scale groups or individuals are occasionally also seen.

In the North Sea area, sea lion or seals are found around the Scottish islands in Wash, beside the English, French and Belgium coasts, in the Danish Skagerrak and next to the southern coast of Norway.

Birth and Nursing Of Seals

Seals give birth to their baby on dry land. Harbor seals are born in the June, July, and August, grey seals in the December, January, and February due to winter season grey seal pups have a thick winter coat. They are charming with their long white hair but it is also a bit unpleasant. Green seals can’t swim due to heavy coats on his body.

seals giving birth to his child

In the two or three weeks of their life, grey seal babies remain on the land. The mother goes back regularly to take care, which they usually do for three to four weeks or more than that. During this time, the babies of seals only drink milk and they did not grapes to fish. Their weight is usually 10 kilograms at birth time and 40 kilograms when they get nourished. When their mother leaves them, the young seals teach how to get food and what to eat and what not and teach how to live life in seawater.

Diet of Seals

Seals mainly eat fish. Pinnipedia use whiskers for locating prey in these primarily turbid waters. Seals can sense the small movements in the water. In that way, the phocine can make out in turbulent water where the fish are, capable of a distance of 100 meters. They can easily decide the size and shape of the fish from a distance.

seals eating a fish

Pinnipedia does not have a predilection for one specific fish species, but they normally catch fish that are close to the sea bottom or near to them. Flatfish, lesser sandeel, and cod family are their beloved food however, it can vary per season, related to what’s available. Teenage seals must teach themselves to eat and grab fish look after ends. Their mother doesn’t teach them the habit. Most of them learn it on time when they travel with their mother or group.

Threats To Seals

Human

Seals were painfully hunted in the North Sea Region in the past few years. Pinnipedia was considered as in some places pests. They harm fishing nets and grab fish away from the fishermen. Hunters get a surcharge for every seal shot. However, the fact that trapping seals in the Wadden and North Seas extend more than 40 years ago and the seal population has enlarged, they are still endangered. The threat facing seals in these days is the flow of polluting waste materials from land to sea and from release and accidents at sea. In addition, interference from shipping and recreation issues for the seals. Other threats include going under in fykes and other fishnets.

Marine Pollution

Every day, a large burden of include waste runs into the North Sea. Start from agriculture, industry, and cities, these materials detect their process via rivers which mouth in the North Sea. Other waste materials come from discard and shipping hazards at sea, and in the air form of acid rain. Plankton sucks up the poison then it enters into the food chain.

At last, they accumulate in marine mammals via the bottom underwater animals and the fish. The collection of poison is highest in those species of animals living in the low or beneath the food chain. A popular example of a dangerous poison for seals is PCBs. In the 1980s, many pinnipeds weren’t able to replicate and were often sick from this toxin.

Fish Trap

Fish that dip into a trap form an attractive for a seal. The seal will swim into the trap to catch the fish. Since 1994, all fish traps in Dutch tidal waters are needed to be provided with a retaining net, specifically to keep off seals. This hold on the net is a large-meshed net at the entrance to the fyke. Nevertheless, seals are still trapped in fish net unequipped with the required retaining nets.

Increasing Activity at Sea

A major problem for seals in the North Sea and the Wadden Sea is the increasing activity by humans. Tourists and military activities and their presence disorder resting seals in the Wadden region. This kind of disturbance is mainly a threat during the summer when the harbor seal gives birth to their child. The young babies don’t get sufficient time to nurse or mother and young become separated due to this the seal reservations have been nominated, where the animals must be left in a calm or peaceful.

The water police take proper measures against tourists that are getting too close to seals as per the rules created by water police. Seals are much slighter sensitive to disruption in the water apart from on land. They even incline to swim towards people.

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