Black Brent Goose (pacific)

Rotgans (pacific)

Black Brent Goose (pacific) (Branta bernicla nigricans)

De Black Brent Goose (pacific) (Branta bernicla nigricans) is een goose uit de familie van de water birds that includes ducks, geese, and swans (Anatidae).

Naamgeving

Nederlandse naam:
Rotgans (pacific)
Engelse naam:
Black Brent Goose
Duitse naam:
Ringelgans
Franse naam:
Bernache cravant
Wetenschappelijke naam:
Branta bernicla nigricans

Taxonomische indeling

Orde:
Anseriformes
Familie:
Anatidae
Onderfamilie:
Anserinae
Geslacht:
Branta

Beschrijving

Uiterlijke kenmerken:

Male:
Small, black to grey goose, has a short neck, and a small head and bill borne on a plump body. From a distance it looks all dark apart from the gleaming white under-tail, but is in fact typically grey-brown on the back with a small white necklace that can be all the way around the neck or just a touch of white on both sides. This varies depending sup species. The color of the belly varies from black to grey and brown barring with white according to subspecies and subpopulation. Bill, Legs and feet are black

Female:
Are similar in appearance, although the male is usually slightly larger and tends to have a broader neck patch.

Juvenile:
Looks similar to adult but not as defined color in plumage. Most lack white patch.

Gedrag:

Northern Geese are generally hardy and easy to manage. They are usually gregarious and many species may be kept in flocks, however they tend to be territorial and aggressive in the breeding season and some may need to be maintained in separate pens. It is often possible to keep small ducks with pairs of geese, unless the individual goose pair is particularly pugnacious. They should always be provided with adequate water for swimming.

Maten en Gewicht

Lengte man:
De man (woerd) van de Black Brent Goose (pacific) heeft een lichaamslengte van ongeveer 55-66 centimeters. De vrouw (pop) heeft een lichaamslengte van ongeveer 55-66 centimeters.
Gewicht man:
Het mannetje weegt ongeveer 1400-2250 gram. Het vrouwtje weegt ongeveer 1200-1770 gram.
Het gewicht is notoir variabel en kan alleen als indicatie worden gebruikt!
Ondersoorten:

Intraspecific variation:

  • Light-bellied Brent - (Branta bernicla hrota)
  • Atlantic Brent - (Branta bernicla hrota)
  • Dark-bellied Brent - (Branta bernicla bernicla)
  • Russian Brent - (Branta bernicla bernicla)
  • Black Brent - (Branta bernicla nigricans)
  • Pacific Brent - (Branta bernicla nigricans)
  • Lawrence's Brent - (Branta bernicla orientalis)
Habitat:

For a single pair of geese a total pen area of 300m² (or 200m²  for smaller species, e.g. Red-breasted goose - (Branta ruficollis)), with at least 20% of this area water is suggested, although more water should be provided if possible in a larger pen.

Notitie:

Brent geese are generally hardy and not difficult to keep; they are attractive as small flocks but require space and good grazing. Large enclosures with plentiful short grazing, a clear, cold lake and shade available are suggested. Feed with Lundi pellets in addition to grass.

These geese are generally not easy to breed; some subspecies breed in captivity better than others. They nest in grass in secluded areas, also in boxes and large baskets. Eggs laid mainly in May to July. Goslings should be protected from excessive heat, fed on starter crumbs and duckweed, and should be put out on short grass when a few days old.

Hybridisation is very rare, but has been reported with Branta spp. such as Canada goose - (Branta canadensis)Barnacle goose - (Branta leucopsis) -  and also Anser species.

Breeding:
Het vrouwtje Black Brent Goose (pacific) legt doorgaans zo'n 3-5 cream, yellowish, greenish or pale olive eieren het broeden duurt 24-26 dagen.

Kunstmatig broeden:

De ideale relatieve luchtvochtigheid voor het uitbroeden van de meeste watervogeleieren is 55% voor grondbroeders en 40% bij holenbroeders. De temperatuur is meestal 37,4° C. Stel ventilatie in zoals aanbevolen door de fabrikant van de broedmachine. Eieren moeten minimaal 4 keer per dag automatisch of met de hand worden gedraaid. Naarmate de vrucht zich ontwikkelt, verliest het ei water en wordt de luchtzak groter. Bij normale ontwikkeling van een ei met een incubatietijd van 24-26 dagen neemt de luchtzak ongeveer een derde van het ei in beslag, dit bij drie dagen voor uitkomst. Reinheid is van vitaal belang en idealiter moet de luchtvochtigheid worden verhoogd tot 65% nadat de eerste tekenen van uitkomst zichtbaar worden.


Ringdagen:
Aanbevolen passende ringmaat voor de Black Brent Goose (pacific) is 12 mm.
De gesloten pootring kan alleen aangebracht worden bij een jonge goose van ongeveer 12-14 dagen oud.

It doesn't matter what leg that you band, but it's good to have a consistent system.
Suggested: Left leg = Female, Right leg = Male
Onderhoudsvoeder:
Lundi Regular
Lundi Regular
Lundi Regular
Lundi Regular
Lundi Regular

Lundi Regular with a protein content of 20%, valuable Spirulina and high-quality by-products is optimally balanced in its composition maintenance food for water ornamental fowl of all kinds. Especially green teal and Whistling ducks that are not dependent on a very high protein content, are well supplied.

Lundi Regular contains all the minerals and vitamins in full form that are important for the animals. Therefore also suitable as breeding food.

Lundi Premium
Lundi Premium
Lundi Premium
Lundi Premium
Lundi Premium

Floating full food for all sea ducks, green ducks, eider ducks and geese, especially in the moulting and breeding phase ideally suited. Packed with wholesome raw materials, natural vitamins and trace elements, this performance food with a protein content of 30% forms the basis for lifelong vitality.

Foto's van de Black Brent Goose (pacific)