Bird Families

Southern Giant Petrel (Macronectes giganteus) Profile

Pin
Send
Share
Send
Send


The Southern Giant Petrel, scientific name Macronectes giganteus, also known as the Antarctic Giant Petrel, Giant Fulmer, Stinky, and Stinkpot, is a huge sea bird in the Southern Ocean.

Its distribution similarly overlaps extensively with the Giant Petrel in the north, though it is centered slightly further south as a whole. Adults of two species can be distinguished by the color of their bill-tip: green in the south and red in the north.

Description of Southern Giant Petrel

Southern Giant Petrel and its sister species are the largest members of the Pseillaridae. The gigantic petrel in the south measures 86 to 99 cm (34-39 inches) with wings of 185 to 205 centimeters (73-81 inches).

Consistent with Bergman's rule, both Southern Giant Petrel and the northern giant petrel vary considerably in size, with the southern colonies having a larger average than the northern colony.

Due to the large-scale variability, it is difficult to determine which is a larger species, but the largest-bodied colonies of the Southern Giant Petrel are somewhat larger on average, in both mass and linear dimensions than the largest of the northern giant petals.

Body masses of a Southern Giant Petrel can range from 2.3 to 5.6 kg (5.1-12.3 lbs), larger than the average females of males. The highest average weight of a Southern Giant Petrel comes from Macquarie Island, where 20 males averaged 8.5 kg (1.8 lbs) and 20 females averaged 6.2 kg (1.8 lbs). In the South Orkney Islands, 6 males averaged 9.5 kg (1.8 lb) and 5 females averaged 8.5 lb (4.5 lb).

In contrast, in Patagonia, 15 males average 3.5 kg (7.7 lbs) and 21 females average 2.5 kg (5.5 lbs). However, another study from Patagonia showed that 26 men had a mean average weight of 1.2 kg (1.8 lbs) and that of 27 women averaged 7.7 kg (1.2 lbs).

Southern Giant Petrel has a very large yellow bill, with a green tip and gray-brown legs. There are two separate shapes, the dark one is similar to the northern giant petrel and the more distinctive is the light form.

The upper breast, head, and neck of a Southern Giant Petrel are light in a dark wrap, and the feather has become brown with the top edge of its branches below the inner, such as light.

The light form is rare and absolutely distinct and otherwise, all-white has light black spots. As a teenager, the dark form begins with age with more subtle browns and palaces.

Both monster petals have strong legs and can effectively rotate on the ground. Finally, when on the plane, this species has a somewhat hunchbacked appearance.

Southern Giant Petrel, like all members of processelliforms, also has features that distinguish it from other birds. First, they have nasal passages called nasource which are linked to the above bill. Petals' nose holes are at the top of the bill. The bills of all Procellariiformes are also distinctive in that they are divided into seven to nine horny plates.

They produce a stomach oil made of wax esters and triglyceride that is stored in the proventriculus. It can be sprayed from their mouths as a defense against predators and is used as a source of energy-rich food for rats and adults during their long flights.

They have a salt gland on top of the nasal passages, which helps them remove the salt from their blood; These salts, primarily sodium chloride, are their seawater intake and the abundance of seawater that they soak; It extracts dense salt solution from the nasal passages.

Reproduction

The giant monster of the South attained sexual maturity at the age of six or seven; However, the average age of first breeding is ten years.

Its breeding season begins in October. Its nest is a mound of moss, grass, and stone with a depression in the middle and lying on the bare or grassy ground. They lay loose, excluding the Falkland Islands. The colonies were formed where the colonies were much larger.

A sterile white egg that is 103 by 70 millimeters (4.1 by 2.8 inches) laid is laid for 55-66 days, where it is always protected by at least one of the parents. When a white chick is born it is brooded for two to three weeks and spreads within 104 days132 days.

Upbringing

These petrels will feed fish, krill, squid, offal, and waste from boats in coastal and plainsic waters, where they often follow liner and cruise ships. Unlike most other procelariforums, this bird will eat Carrion. The Southern Giant Petrel is extremely aggressive predators and will kill other marine birds (usually penguin rats, sick or injured adult penguins and other marine birds).

It has also been found to prey on the adult Australian gannet by capturing it underwater. These birds have also been shown to have yellow noses and are submerged in black-browed albatrosses. Men exclude wives from their dead bodies.

Population

The range of this bird is very large because it ranges from Antarctica to Chile, Africa, and Australia, and its coastal regions, and its occurring range is 36,000,000 km 2 (14,000,000 square miles). It breeds on numerous islands throughout the Southern Ocean.

The populated islands include the Falkland Islands, South Georgia, South Orkney Islands, Staten Islands, South Shetland, Hard Island, Macquarie Island, Prince Edward Islands, and the Crozet Islands.

Diego Ramirez, along with Isla Noor, along with Terre Adele Four locations on the continent of Antarctica and small islands off the coast of Argentina, near Chubut Province. The colonies were visited year-round.

Hunting animals

The rats are vulnerable to mammal predators, such as small rats. They are not recognized as threatening by members of a colony and can kill all the shells of a colony.

Save

20A was a good year for the species as it was raised by the IUCN to a state of utmost concern due to the near threat. This downgrade was due to a clearer picture and more accurate calculations.

The overall population trends show that there were 5,4 pairs in the decade of 9, which decreased to 5 at the end of the decade, and then there were 3, 5.

The Falkland Islands and most of the South Georgia Islands have shown growth since the 1980s. In the decade of ০re০s, Terre Adei has shown a drastic reduction as the count has dropped from 5 pairs to 3-4 pairs.

The official 10/3 generation trend has been listed by BirdLife International at a 1% -9% reduction, but it has been stated that it is a conservative number.

They elaborate that in the best case it is a 17% increase and the worst-case scenario is a 7.2% reduction.

The major threats to the healthy health of this species begin with long-term fishing and general accidental deaths resulting from troll fishing near the Falkland Islands.

Between 2 and 5, 6 died in illegal fishing in 3-4. Also, the number of southern elephant seals, which is an important source of food as carrion, is shrinking. Human disturbance has also had an adverse effect on these birds.

It was deployed in CMS Appendix II and ACAP Annex I for the uninterrupted survival of this bird. Many of the islands on which it originates are the nature archive, and the island of Gough and Macquarie Island is a fascinating sight.

Observations are in South Georgia, Marion Island, Crozet Islands, Terre Adley, and Macquarie Islands. Over the past decade, there have been two censuses of Gough Island.

Continuous monitoring and surveys have been proposed at major breeding sites, as well as studies on movement and migration. Lastly, the continued dissemination of the “best-practice mitigation system” through the existing procedures outlined in CCAMLR, CMS, and FAO.

Watch the video: GiantPetrelsKillingKingPenguin (April 2021).

Pin
Send
Share
Send
Send