Population trends, breeding success and diet composition of gentoo Pygoscelis papua , magellanic Spheniscus magellanicus and rockhopper Eudyptes chrysocome penguins in the Falkland Islands. A review

Polar Biology ◽  
2001 ◽  
Vol 24 (11) ◽  
pp. 793-807 ◽  
Author(s):  
Klemens Pütz ◽  
Rebecca Ingham ◽  
Jeremy Smith ◽  
John Croxall
Keyword(s):  
Breeding Success ◽  
Diet Composition ◽  
Population Trends ◽  
Falkland Islands ◽  
Pygoscelis Papua ◽  
Spheniscus Magellanicus

Predation on Gonatus antarcticus by Falkland Islands seabirds

1994 ◽  
Vol 6 (2) ◽  
pp. 269-274 ◽  
Author(s):  
K.R. Thompson
Keyword(s):  
Prey Item ◽  
Falkland Islands ◽  
Pygoscelis Papua ◽  
Spheniscus Magellanicus ◽  
Penguin Species

Recent studies of Falkland Islands seabird diets have found that Gonatus antarticus is a major prey item for a number of penguin species. Rockhopper (Eudyptes chrysocome), gentoo (Pygoscelis papua) and Magellanic (Spheniscus magellanicus) penguins breeding in the Falklands are estimated to consume several thousand million Gonatus per annum, with mean dorsal mantle lengths of 28–42 mm. Aspects of the distribution and growth of the G. antarcticus stock in the vicinity of the Falkland Islands are discussed.

scholarly journals Variation among colonies in breeding success and population trajectories of wandering albatrosses Diomedea exulans at South Georgia

Polar Biology ◽  
2021 ◽  
Author(s):  
Carola Rackete ◽  
Sally Poncet ◽  
Stephanie D. Good ◽  
Richard A. Phillips ◽  
Ken Passfield ◽  
...  
Keyword(s):  
Body Condition ◽  
Breeding Success ◽  
Population Trends ◽  
Contributing Factors ◽  
South Georgia ◽  
Vortex Model ◽  
Demographic Rates ◽  
Diomedea Exulans ◽  
Adult Body ◽  
Provisioning Rate

AbstractThe wandering albatross, Diomedea exulans, is a globally threatened species breeding at a number of sites within the Southern Ocean. Across the South Georgia archipelago, there are differences in population trends even at closely located colonies. Between 1999 and 2018 the largest colony, at Bird Island, declined at 3.01% per annum, while in the Bay of Isles, the decline was 1.44% per annum. Using mean demographic rates from a 31-year study at Bird Island and an 11-year study of breeding success at Prion Island in the Bay of Isles in a VORTEX model, we show that differences in breeding success do not fully explain observed differences in population trends. Other potential contributing factors are differential use of foraging areas, with possible knock-on effects on adult body condition, provisioning rate and breeding success, or on bycatch rates of adults or immatures.

scholarly journals The distribution, abundance and population trends of gentoo, rockhopper and king penguins in the Falkland Islands

Oryx ◽  
1998 ◽  
Vol 32 (3) ◽  
pp. 223-232 ◽  
Author(s):  
M. Bingham
Keyword(s):  
World Wide ◽  
Austral Summer ◽  
Population Trends ◽  
King Penguin ◽  
Falkland Islands ◽  
Terrestrial Environment ◽  
Breeding Populations ◽  
Breeding Location ◽  
Penguin Species

The Falkland Islands are a globally important breeding location for seabirds, including penguins. The total breeding populations of three of the four main penguin species present in the Falklands were censused in the austral summer of 1995/96. The results for gentoo and rockhopper penguins suggest declines of about 43 and 90 per cent, respectively, since a similar census in 1932/33. Recent monitoring studies suggest that these declines are still continuing; research to investigate causes (which is likely to reflect changes in the marine, rather than terrestrial environment) is a high priority. In contrast, king penguin populations, currently c. 400 pairs, have increased steadily, by 700 per cent since 1980/81, in line with world-wide trends for this species.

Black-Faced Spoonbill Platalea minor Population Trends, Breeding Success, and Nest Characteristics in the Chilsan Archipelago, South Korea

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Seok-Jun Son ◽  
Ki-Sup Lee ◽  
In-Ki Kwon ◽  
Jung-Hoon Kang ◽  
Sung-Kyung Lee ◽  
...  
Keyword(s):  
South Korea ◽  
Breeding Success ◽  
Population Trends ◽  
Minor Population

Inter-annual variation in the trophic niche of Magellanic penguins Spheniscus magellanicus during the pre-molt period in the Beagle Channel

2020 ◽  
Vol 655 ◽  
pp. 215-225
Author(s):  
S Dodino ◽  
L Riccialdelli ◽  
MJ Polito ◽  
K Pütz ◽  
A Raya Rey
Keyword(s):  
Diet Composition ◽  
Annual Variation ◽  
Isotope Analysis ◽  
Trophic Niche ◽  
Carbon And Nitrogen ◽  
Spheniscus Magellanicus ◽  
Beagle Channel ◽  
Annual Variations ◽  
Magellanic Penguins ◽  
Key Species

Inter-annual variations in the diets of seabirds are often a reflection of resource availability, with population dynamics and community structure implications. We investigated the trophic niche of Magellanic penguins Spheniscus magellanicus during the pre-molt stage in 6 years (2009 and 2013-2017) at Martillo Island, Beagle Channel, Argentina, using carbon and nitrogen stable isotope analysis of feathers. We found higher values in 2009 compared to the other years for both isotopes and estimated different proportions of prey in the diet of Magellanic penguins throughout the years. In 2009, penguins consumed mainly a mixture of benthic and benthopelagic fish, whereas from 2013 to 2017, the proportion of the pelagic form of squat lobster Munida gregaria, considered a key species in the Beagle Channel, increased over time and nearly dominated diets in 2017. Our results confirm that Magellanic penguins act as sentinels, reflecting shifts in the marine community of the Beagle Channel via inter-annual variation in their trophic niche and diet composition.

Breeding success and population trends in Adélie penguins in areas with low and high levels of human disturbance

Polar Biology ◽  
2007 ◽  
Vol 30 (7) ◽  
pp. 917-924 ◽  
Author(s):  
A. R. Carlini ◽  
N. R. Coria ◽  
M. M. Santos ◽  
M. M. Libertelli ◽  
G. Donini
Keyword(s):  
Breeding Success ◽  
Human Disturbance ◽  
Population Trends ◽  
Adélie Penguins
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