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Eudyptes filholi o E. chrysocome filholi, és el nom científic d'un ocell marí de la família dels esfeníscids (Spheniscidae). És un dels coneguts com pingüins crestats i era considerat una subespècie del pingüí salta-roques. Encara que s'han demostrat diferències genètiques entre els dos grups,[1][2] molts autors continuen considerant-lo una subespècie; és el cas de l'UICN Red List (2010.4).[3] En anglès ha rebut el nom de "Eastern Rockhopper Penguin" (Pingüí salta-roques oriental) i en francès el de "Gorfou de Filhol" (Pingüí de Filhol).
Cria a les illes sub-antàrtiques de l'Indo-Pacífic, a Príncep Eduard, Crozet, Kerguelen, Heard, Macquarie, Campbell, Auckland i Antípodes.
Eudyptes filholi o E. chrysocome filholi, és el nom científic d'un ocell marí de la família dels esfeníscids (Spheniscidae). És un dels coneguts com pingüins crestats i era considerat una subespècie del pingüí salta-roques. Encara que s'han demostrat diferències genètiques entre els dos grups, molts autors continuen considerant-lo una subespècie; és el cas de l'UICN Red List (2010.4). En anglès ha rebut el nom de "Eastern Rockhopper Penguin" (Pingüí salta-roques oriental) i en francès el de "Gorfou de Filhol" (Pingüí de Filhol).
Cria a les illes sub-antàrtiques de l'Indo-Pacífic, a Príncep Eduard, Crozet, Kerguelen, Heard, Macquarie, Campbell, Auckland i Antípodes.
The eastern rockhopper penguin (Eudyptes chrysocome filholi) is a crested penguin with yellow crest feathers.[1] It is a subspecies of the southern rockhopper penguin (Eudyptes chrysocome) found in subantarctic regions and the Indian Ocean.[1] It is one of the smallest crested penguins and has distinctive pink margins around its bill.[2]
The eastern rockhopper penguin is a small, crested penguin with a black back and throat, a white belly and pink feet.[1] This seabird measures approximately 45–55 cm in length, and weighs 2.2–4.3 kg.[3] It has a thin yellow stripe that stretches from its lower forehead, over its red eye and splits into crest feathers at the back of its head.[2] The crest feathers are composed of long, thin, spiky yellow feathers on either side of the penguin's head and they are joined by shorter black feathers.[2] Rockhopper penguins have an orange-brown bill and the eastern rockhopper penguin has distinctive pink margins around the bill.[1] Males and females differ in body size and size of their bill;[1] males are generally larger and have a thicker bill.[2]
Fledglings, which are around 65 days old, are bluish black all over and lack crest feathers.[1] They also have a smaller, thinner bill than juveniles and adults.[1] Juveniles, which are penguins aged 1 to 2 years old, are a black-brown color with a grey throat.[1] They develop a brown-orange bill that is darker than the adult coloring and have small yellow crest feathers.[1] Eastern rockhopper penguins molt and get their adult plumage at 2 years old.[1]
The rockhopper penguin can be divided into two species; the northern rockhopper penguin (Eudyptes moseleyiI) and the southern rockhopper penguin.[2] These populations differ in many ways including morphological, ecological and behavioural differences.[2] The northern rockhopper penguin is larger than its southern counterpart and has longer crest feathers.[4] Other morphological differences include different color patterns on the underside of their flipper and different size eyestripes.[4] They also exhibit different behavioural traits such as foraging in different water temperatures.[2] Two subspecies of the southern rockhopper penguin are recognized; the eastern and the western rockhopper penguin (Eudyptes chrysocome chrysocome).[2] These subspecies differ mainly in their distribution; the western species is found in Cape Horn, South America and the Falkland Islands while its eastern counterpart occupies the Southern Indian and Pacific Ocean.[2] The eastern rockhopper penguin can also be distinguished by its pink margins around the bill.[2]
The eastern rockhopper penguin is found in the southern Indian and Pacific ocean from Prince Edward Islands to the Antipodes Islands.[2] Rockhopper penguins, in general, occupied a circumpolar distribution in the arctic during breeding season.[1] Eastern rockhopper penguins breed in the Marion Islands, Macquarie island and subantarctic islands in New Zealand such as the Antipodes islands and Campbell island.[4] These penguins occupy a mainly marine pelagic habitat and only return to land to breed and moult.[1] They spend the winter months, approximately April to October, in the southern Indian Ocean foraging for food and can spend up to 6 months at sea.[1] They travel, on average, 2000 to 4000 km away from their breeding site during this winter period.[1] This species mainly forages in cool waters; ocean temperatures of less than 4.5 degrees Celsius.[5]
Eastern rockhopper penguins are surface nesters and will build their nest on slopes or rocky shores near the coastline.[2] Colonies will usually form on steep cliffs near the sea and can contain tens-of-thousands of nests.[1] Their nests are made of small pebbles and can occasionally contain some vegetation.[1] Some colonies have settled within grasslands such as tussock, however the soil often erodes down to rock with the accumulation of guano and trampling over a few decades.[1] Eastern rockhopper penguins are rarely found more than 200 meters away from the coastline, since it is ideal to remain near their food supply.[1]
Eastern rockhopper penguins use calls for parent-chick recognition when returning to the colony with food.[6] They also use a song for courtship that can be described as a short repeated rhythmic ascending song.[2][7] The song of an adult rockhopper penguin can have 5-30 syllables with the first syllable the longest.[6] Their contact call used by chicks and adults is a very short shrill bark.[2]
Eastern rockhopper penguins feed on a variety of fish, crustaceans and cephalopods such as krill and squid.[8] Their diet can differ depending on where they are in their life cycle.[5] During their pre-moult season, eastern rockhopper penguins mainly consume crustaceans, while during the breeding period their diet heavily relies on euphausiids in the Marion islands.[5] Different breeding location will also impact their diet; chicks in the Campbell island were found to mainly consume dwarf cod.[9] Rockhopper penguins highly depend on a predictable food source near their nesting habitat to feed their chicks.[10] However, if necessary rockhopper penguins can forage up to 120 km away from their breeding grounds to find food for their chicks.[8]
They are diurnal divers; the majority of their foraging activity occurs during the day with the deepest dives occurring at sunrise.[11] When searching for food, they usually stay at a depth of 6m and dive down 30-50m in the water column to catch their prey.[11] They tend to forage in cool waters since they are most productive.[5] They also selected foraging areas with large generation of eddies currents.[5] This type of current supports high aggregations of prey species.[5]
The predators of the rockhopper penguin includes fur seals and sea lions.[3] As well, brown skuas (Stercorarius antarcticus) and northern giant petrel (Macronectes halli) prey on rockhopper penguin eggs and chicks.[3]
Breeding season starts in October for eastern rockhopper penguins; males return to the breeding colony first and the females follow shortly after.[1] Courtship begins between pairs and both sexes fast until the female lays the first eggs usually around the beginning of November.[1] After the eggs are laid, the male and female will share all the parental duties.[1] The first incubation period is shared and both parents will fast during this time, approximately 7 days.[11] After this, the female takes the first solo incubation shift while the male goes to forage at sea, this can last up to 3 weeks.[11] Once the male returns, he takes over incubation while the female forages for approximately 10 days, by the time she returns, the chicks have hatched.[11] After the chicks hatch, the male will guard the chicks and continue to fast while the female forages and returns with food for the chicks.[3] The chicks form creches when they are around 24 days old and during this time both parents foraged and return with food.[1] A creche is a common occurrence in bird species when the juveniles form protective groups to allow the parents to forage.[12] Parent penguins continue to feed chicks until they fledge around February[13] when they are approximately 65 days old.[1] Adult penguins will return to the breeding colony in April to moult before their winter at sea.[3]
The eastern rockhopper penguin is considered a vulnerable species due to rapid population declines.[13] This decrease in population is mostly seen in breeding regions since it is the easiest form of census.[3] Most research agrees that the decline in rockhopper penguins is due to low food availability and decrease in food quality driven by climate change.[1][3][13] Due to climate change, sea surface and ocean temperatures are changing and this effects the distribution of prey populations.[3] Rockhopper penguins, and many other species, are sensitive to changes in water temperature[13] and as a consequence, adult penguins must forage farther away from breeding colonies.[3] They often return with smaller amounts of food for their chicks which leads to a decrease in body mass.[3] Low food availability also has a large effect on penguin's moult period.[3] Moulting is a very energy demanding process and requires penguins have sufficient body mass.[3] Due to poor diet, there is an increase in mortality during the moulting season.[3] Low food quality and abundance in wintering regions have also led to an increase in adult mortality.[3] Climate change has additionally affected the amount and intensity of storms in breeding ranges.[13] Intensity of winds displace prey populations and reduce penguin foraging success.[13]
Wikispecies has information related to Eudyptes chrysocome filholi. The eastern rockhopper penguin (Eudyptes chrysocome filholi) is a crested penguin with yellow crest feathers. It is a subspecies of the southern rockhopper penguin (Eudyptes chrysocome) found in subantarctic regions and the Indian Ocean. It is one of the smallest crested penguins and has distinctive pink margins around its bill.
La Orienta flavtufa pingveno aŭ Orienta ŝtonsalta pingveno (Eudyptes filholi aŭ Eudyptes chrysocome filholi) kvankam genetike diferenca[1][2] estas ankoraŭ ofte konsiderata subspecio de la Ŝtonsalta pingveno aŭ Flavtufa pingveno.
La Flavtufa pingveno Eudyptes chrysocome estas foje konsiderata kiel du specioj, nome Norda kaj Suda ŝtonsalta pingveno, post enketado publikita en 2006 montris morfologiajn, voĉajn kaj genetikajn diferencojn inter ambaŭ populacioj.[3][4] Molekula datado sugestas, ke la genetika diverĝo rilate al la Suda ŝtonsalta pingveno povus esti kaŭzita de vikaria evento kaŭzita siavice de ŝanĝo en la situo de la Subtropika Fronto dum la klimata transiro de meza Pleistoceno.[5] Analizo de parto de la mitokondria kontrolregiono de Norda ŝtonsalta pingveno trovita ĉe la Kergelenoj montris, ke ĝi povus esti veninta el la insulo Gough, 6,000 km for, kaj ke la Suda kaj Norda ŝtonsaltaj pingvenoj estas genetike separataj, kvankam kelkaj individuoj povus disiĝi el siaj reproduktaj kolonioj.[6] Multaj taksonomiistoj ankoraŭ ne agnoskis la disigon, kvankam kelkaj komencis fari tion.
E. c. filholi reproduktiĝas ĉe ĉeantarktaj insuloj de la Hindo-Pacifika Oceano: nome Princ-Eduardaj, Krozetoj, Kergelenoj, Herdo, Makvora, Kampbelo, Aŭklando, kaj Antipodoj.
La Orienta flavtufa pingveno aŭ Orienta ŝtonsalta pingveno (Eudyptes filholi aŭ Eudyptes chrysocome filholi) kvankam genetike diferenca estas ankoraŭ ofte konsiderata subspecio de la Ŝtonsalta pingveno aŭ Flavtufa pingveno.
Eudyptes chrysocome filholi es una de las dos subespecies del pingüino Eudyptes chrysocome. Se distribuye en islas subantárticas situadas en el sur del océano Índico, hasta el sur de Nueva Zelanda.
Fue descrita originalmente por Hutton en el año 1879. Su localidad tipo es: «islas Campbell».
Posee un largo total de 60 a 65 cm, con un promedio de peso de 3,35 kg. El color del plumaje es negro en la cabeza y en lo superior del cuerpo, y blanco en el resto ventral. Sobre sus rojos ojos muestra una ceja de plumas amarillo brillante las cuales se proyectan hacia atrás.
Con respecto a la otra subespecie (Eudyptes chrysocome chrysocome) se la distingue por poseer el margen del pico rosado y carnoso. También es distinto el diseño del color del plumaje en la parte inferior de las alas.[2]
Al haber disminuido enormemente las poblaciones de los 3 taxones que integran el complejo Eudyptes chrysocome (Forster 1781), sus relaciones taxonómicas adquirieron una importancia crucial en relación a los programas de conservación. La taxonomía de los 3 taxones es materia de debate entre los especialistas. Algunos reconocían 3 subespecies basadas en la importante separación geográfica de las poblaciones reproductoras, unida a diferencias morfológicas. Mayormente, en cambio, ha prevalecido la opinión de los autores que sugieren que las diferencias morfológicas apoyan la clasificación en 2 especies: Eudyptes moseleyi y Eudyptes chrysocome, esta última integrada por dos subespecies: Eudyptes chrysocome chrysocome y Eudyptes chrysocome filholi. En un estudio publicado en el año 2006,[3] en el cual se compararon las distancias genéticas entre las tres regiones de genes mitocondriales de los 3 taxones, en relación con las de otras especies estrechamente relacionadas de pingüinos, dio por resultado el apoyo a la reclasificación y tratamiento de los 3 taxones como 3 buenas especies. Esta reclasificación aún no es avalada por todos los especialistas.
Esta subespecie se reproduce en islas subantárticas situadas en el sur del océano Índico, hasta el sur de Nueva Zelanda. Las poblaciones más importantes se encuentran en las islas del Príncipe Eduardo, las islas Crozet, las islas Kerguelen, la isla Heard, la isla Macquarie, las islas Campbell, y las islas Antípodas.
En invierno emprende una migración hacia el norte en busca de aguas a menor latitud, las cuales mantienen una temperatura menos fría en esa estación, alcanzando la costa sur de Australia.
Se alimentan de krill, calamar, pulpos, peces, moluscos, plancton, sepia, y crustáceos.
Crían en colonias, desde el nivel del mar hasta las cumbre de los cerros próximos a la costa, algunas vecen tierra adentro.
El estado de conservación de esta subespecie es vulnerable debido a la desaparición de un 34 % de su población en los últimos treinta años. Las colonias de reproducción de esta subespecie, ordenadas por el número de parejas reproductoras, son:
Todas las subpoblaciones de esta subespecie han sufrido importantes descensos poblacionales, destacando el ocurrido en la isla Campbell, en donde este taxón ha perdido 1,5 millones de parejas reproductoras (el 94 % de su población original).[5] Otras colonias con serias bajas en sus números (de más del 40 %) son la de la isla Marion, las de las islas Antípodas, y las de las islas Auckland.[6]
|coautores= (ayuda) Eudyptes chrysocome filholi es una de las dos subespecies del pingüino Eudyptes chrysocome. Se distribuye en islas subantárticas situadas en el sur del océano Índico, hasta el sur de Nueva Zelanda.
Eudyptes chrysocome filholi est une sous-espèce du Gorfou sauteur (Eudyptes chrysocome). Elle est très semblable à cette dernière espèce, mais génétiquement différente, et sa distribution est clairement dissociée de celle du Gorfou sauteur. Elle est parfois considérée comme une espèce à part entière.
Auparavant considérée comme une espèce par la classification de référence du Congrès ornithologique international, cela n'est plus le cas à partir de sa version 2.9, (2011), s'appuyant en cela sur les travaux de Banks et al. (2006)[1]
Les gorfous de cette espèce possèdent une touffe de plumes de chaque côté de sa tête appelée « aigrette ».
Eudyptes chrysocome filholi est une sous-espèce du Gorfou sauteur (Eudyptes chrysocome). Elle est très semblable à cette dernière espèce, mais génétiquement différente, et sa distribution est clairement dissociée de celle du Gorfou sauteur. Elle est parfois considérée comme une espèce à part entière.
Auparavant considérée comme une espèce par la classification de référence du Congrès ornithologique international, cela n'est plus le cas à partir de sa version 2.9, (2011), s'appuyant en cela sur les travaux de Banks et al. (2006)
Eudyptes chrysocome filholi is een pinguïnondersoort.
Eudyptes chrysocome filholi broedt op de sub-antarctische eilanden in de Zuidelijke Oceaan: Prins Edwardeilanden, Crozeteilanden, Kerguelen, Heardeiland, Macquarie-eiland, Campbell-eiland, Aucklandeilanden en de Antipodeneilanden.
Bronnen, noten en/of referentiesEudyptes chrysocome filholi is een pinguïnondersoort.
Chim cánh cụt rockhopper miền Đông (Eudyptes chrysocome filholi) mặc dù có sự khác biệt về mặt di truyền,[1][1] vẫn thường được coi là một phân loài của chim cánh cụt rockhopper miền Nam.
Eudyptes chrysocome là đôi khi được coi là hai loài, chim cánh cụt rockhopper miền bắc và miền nam, sau khi nghiên cứu được xuất bản vào năm 2006 chứng minh đặc điểm hình thái, giọng nói và sự khác biệt về mặt di truyền giữa hai giống loài.[2][3] Molecular clock cho thấy rằng sự di truyền khác nhau rockhopper miền Nam và Bắc có thể đã bị gây ra bởi một sự kiện vicariant khi vị trí vùng cận nhiệt đới bị thay đổi trong cuộc biến đổi khí hậu giữa kỉ Pleistocene.[4] Cuộc phân tích ty thể từ một con chim cánh cụt rockhopper miền Bắc trên đảo Kerguelen cho thấy rằng nó có thể có đến từ Đảo Gough, cách đấy 6000 km, và rockhopper miền Nam và Bắc khác nhau từ trong gen, mặc dù một số cá thể có thể đã di tản khỏi thuộc địa sinh sản.[5] Nhiều nhà phân loại vẫn chưa nhận ra sự khác, mặc dù số ít thì đã nhận ra điều này.
E. c. filholi sinh sản trên đảo phía bắc Nam Cực của Ấn-Thái Bình Dương: Quần đảo Prince Edward, Crozet, Kerguelen, Đảo Heard, Đảo Macquarie, Đảo Campbell, Quần đảo Auckland, và quần đảo Antipodes.
Chim cánh cụt rockhopper miền Đông (Eudyptes chrysocome filholi) mặc dù có sự khác biệt về mặt di truyền, vẫn thường được coi là một phân loài của chim cánh cụt rockhopper miền Nam.
동부바위뛰기펭귄(Eudyptes chrysocome filholi)은 왕관펭귄속의 펭귄 종 또는 아종이다. 남부바위뛰기펭귄의 아종으로 취급되기도 하지만 최근 유전학 연구결과는 다른 남부바위뛰기펭귄인 서부바위뛰기펭귄과 별개의 종임을 보여준다.
