Seal Predators - Seal Facts and Information
Harp seals are prey for polar bears (Ursus maritimus), killer whales (Orcinus .. a linear relationship between predator and prey abundance are often incorrect. Harp Seals are extremely agile swimmers, able to catch a wide variety of fish are sensitive to touch and possibly to vibrations caused by the movement of prey. A total of20 species were identified as harp seal prey in the presented analyses. predator-prey relationships are essential both in predictions of yield and in.
Harp Seals, Pagophilus groenlandicus ~ omarcafini.info
There is no evidence to really prove that will occur though. Killer Whales are another predator or seals in some areas.
It is often the younger pups that have just started going into the water that these larger animals will feed on.
This is due to the fact that they swallow their prey instead of chewing it. However, both sharks and killer whales are able to bite of huge chunks to swallow from larger prey.
The biggest threat to seals is from other water animals. They are also threatened by some land animals as well though. This is why you will find that they stay in very large groups.
However, if they are hungry enough they will advance and do what they can as an instinct of survival.
In the Arctic Region where so many of the seals live, polar bears are a problem as well. These large sized bears have hearty appetites as well.
The quotas for whitecoat pups in was 63, and in 76, There have been reports that many whitecoats in Russia are not properly killed and are transported while injured to processing areas. In Januarya bill to ban seal hunting was passed by Russian parliament votes to 1, however it was vetoed by President Vladimir Putin. Harp seals, like many other seal species, are blamed by the fishing industry for declining fish stocks, such as cod, particularly in the northwest Atlantic.
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Subsequent analysis has shown that the decline in fish stocks is more likely caused by over-fishing and discarding juvenile cod as bycatch. In spite of this evidence, Canadian fishing interests and provincial government ministers in Newfoundland are calling for a massive cull of several million harp seals. Additional research has shown that the harp seal diet consists of over species of fish and invertebrates, and therefore such a massive reduction in harp seal populations would have a negative impact on the marine food web, and therefore, on commercially fished species.
Somewhat ironically, over-fishing will likely reduce harp seal populations naturally as food sources decline. Evidence exists that harp seal populations in the Arctic and Barents Sea declined when the number of capelin declined in the Barents Sea. As a result, harp seals migrated into Norwegian coastal waters and approximately 80, of these seals died in Norwegian gillnet fisheries exceeding the usual bycatch rate ofIn Canada, harp seals are also at-risk of entanglement where an estimated 17, are killed in lumpfish gillnets in Newfoundland each year.Incredible footage of Harp Seals underwater and on land!
Additionally, in the northeastern United States about harp seals are estimated to be killed each year by entanglement in multispecies sink gillnet fisheries. Like harbor and gray sealsincreased sightings of harp seals were reported in along the eastern seaboard of the United States, including a large number in need of rescue.
The cause of this increase is unknown, but may be attributed to changing distribution or availability of harp seal prey, increased seal populations resulting in greater competition for food, and increased commercial fishing in the north forcing seals south to look for food. Harp seal populations, particularly those feeding in the St.
Lawrence River estuary, are at-risk of environmental contamination. Additionally, the ice in the Gulf of St.
Lawrence has been breaking up and melting earlier each year due to warmer winters, which may be attributed to global warming, has resulted in increased mortality of harp seal pups born on the ice. Are Harp Seals social?
Harp Seals are very social come mating season, forming huge colonies on land. They also often travel and hunt in large pods spaning from dozens to hundreds.
They have a wide variety of calls, some for warning other seals off, others used to attract a mate. What are Harp Seal mating rituals like? Harp Seals migrate south when the winter months start rolling in. While males court females on land, the actual mating occurs in the water.
Males fight for mating rights by biting and beating each other with their flippers. Dominant males will mate with several different females. The pregnancy lasts about 11 months, the pups being born around February. The pups, born with white fur, are about 11 kg in weight and around 80 centimetres in length. The nursing period only lasts about 10 days during which the mother does not feed herself and the pup grows quickly, fattening up to nearly 40 kg.