Moseley's Rockhopper Penguin (Eudyptes moseleyi)

2020 ◽  
Author(s):  
Josep del Hoyo ◽  
Nigel Collar ◽  
Ernest Garcia
Keyword(s):  
Rockhopper Penguin

The glucocorticoid stress response in Magellanic Penguins (Spheniscus magellanicus): comparing within and between breeding seasons, by age and colony, after fighting, and with other penguin species

2015 ◽  
Vol 93 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Brian G. Walker ◽  
P. Dee Boersma ◽  
John C. Wingfield
Keyword(s):  
Stress Response ◽  
Rockhopper Penguin ◽  
Weather Event ◽  
Spheniscus Magellanicus ◽  
Magellanic Penguins ◽  
Baseline Corticosterone ◽  
Breeding Seasons ◽  
Stress Patterns ◽  
Severe Weather Event ◽  
Penguin Species

Comparing baseline and stress-induced glucocorticoid hormone levels in animals is a popular tool to assess differences in stress experienced among groups. We compare corticosterone levels in Magellanic Penguins (Spheniscus magellanicus (J.R. Forster, 1781)) in situations where we hypothesize differences in stress patterns may exist. We compared penguins both within and between breeding seasons, birds breeding at two different locations, penguins at three different ages, penguins that had shown evidence of recent fighting, and, finally, how stress patterns differed for four different penguin species. Throughout a breeding season (settlement, incubation, and chick-rearing), we found no differences in either baseline or stress-induced hormone concentrations. Chick, juvenile, and adult penguins did not differ in baseline corticosterone levels, but juveniles had a reduced stress response. Penguins in one season showed a stress response to capture, likely due to a recent severe weather event. We found no differences in baseline or stress-induced hormone titers for birds from two different breeding locations. Evidence of recent fighting also did not alter baseline corticosterone levels. Finally, among four species of penguins measured (Magellanic, Humboldt (Spheniscus humboldti Meyen, 1834), Galápagos (Spheniscus mendiculus Sundevall, 1871), and Rockhopper (Eudyptes chrysocome (J.R. Forster, 1781)), baseline levels were always consistent, while stress-induced levels were significantly higher in the Rockhopper Penguin only.

Predation by New Zealand sea lions and Brown Skuas is causing the continued decline of an Eastern Rockhopper Penguin colony on Campbell Island

Polar Biology ◽  
2016 ◽  
Vol 40 (4) ◽  
pp. 735-751 ◽  
Author(s):  
Kyle W. Morrison ◽  
Doug P. Armstrong ◽  
Phil F. Battley ◽  
Sarah E. Jamieson ◽  
David R. Thompson
Keyword(s):  
New Zealand ◽  
Rockhopper Penguin ◽  
Sea Lions ◽  
Penguin Colony ◽  
Campbell Island

Eastern Rockhopper Penguin

2019 ◽  
Author(s):  
Kerry-Jayne Wilson ◽  
Thomas Mattern
Keyword(s):  
Rockhopper Penguin

Anatomy of the avian membrana nictitans

1986 ◽  
Vol 64 (4) ◽  
pp. 963-972 ◽  
Author(s):  
Jacob G. Sivak ◽  
Rebecca F. Glover
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Anas Platyrhynchos ◽  
Leading Edge ◽  
Rockhopper Penguin ◽  
Transmission Electron ◽  
Stromal Layer

The anatomy of the membrana nictitans was examined in the rockhopper penguin (Eudyptes crestatus) and in two ducks, a diver (Mergus cucullatus, hooded merganser) and a nondiver (Anas platyrhynchos, common mallard), by light and transmission electron microscopy. In general, the nictitans is organized in a manner reminiscent of the cornea; i.e., an external epithelium, an internal endothelium, and a fibrous stromal layer in between. However, it is thinner than the cornea, a fact reflected by the relatively thin stroma. Nictitans organization varies between species and in different regions of the same membrane. The cellular and acellular components are less organized and not as tighltly packed in the nondiver than in the two other species. In addition, portions of the nictitans that would be coincident with the cornea when it is in place in front of the eye are more highly organized in both divers. The anatomy of the leading edge of the nictitans, including the marginal plait, which may help lock the membrane in position, is described.

Genetic isolation and divergence in sexual traits: evidence for the northern rockhopper penguin Eudyptes moseleyi being a sibling species

2006 ◽  
Vol 15 (11) ◽  
pp. 3413-3423 ◽  
Author(s):  
P. JOUVENTIN ◽  
R. J. CUTHBERT ◽  
R. OTTVALL
Keyword(s):  
Sibling Species ◽  
Genetic Isolation ◽  
Rockhopper Penguin ◽  
Sexual Traits

scholarly journals Good Days, Bad Days: Wind as a Driver of Foraging Success in a Flightless Seabird, the Southern Rockhopper Penguin

PLoS ONE ◽  
2013 ◽  
Vol 8 (11) ◽  
pp. e79487 ◽  
Author(s):  
Nina Dehnhard ◽  
Katrin Ludynia ◽  
Maud Poisbleau ◽  
Laurent Demongin ◽  
Petra Quillfeldt
Keyword(s):  
Foraging Success ◽  
Rockhopper Penguin ◽  
Southern Rockhopper Penguin

Inter-annual variation in the diet of female southern rockhopper penguin (Eudyptes chrysocome chrysocome) at Tierra del Fuego

Polar Biology ◽  
2004 ◽  
Vol 28 (2) ◽  
pp. 132-141 ◽  
Author(s):  
Andrea Raya Rey ◽  
Adri�n Schiavini
Keyword(s):  
Annual Variation ◽  
Tierra Del Fuego ◽  
Rockhopper Penguin ◽  
Southern Rockhopper Penguin

scholarly journals Aspects of the breeding biology of the southern rockhopper penguin Eudyptes c. chrysocome and new consideration on the intrinsic capacity of the A-egg

Polar Biology ◽  
2008 ◽  
Vol 31 (8) ◽  
pp. 925-932 ◽  
Author(s):  
Maud Poisbleau ◽  
Laurent Demongin ◽  
Ian J. Strange ◽  
Helen Otley ◽  
Petra Quillfeldt
Keyword(s):  
Breeding Biology ◽  
Rockhopper Penguin ◽  
Southern Rockhopper Penguin ◽  
Intrinsic Capacity
Sign in / Sign up

Export Citation Format

Share Document