EurekaMag.com logo
+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Subcolony characteristics and breeding performance in the chinstrap penguin Pygoscelis antarctica



Subcolony characteristics and breeding performance in the chinstrap penguin Pygoscelis antarctica



Ardeola io; 53(1): 9



Aims: Subcolonies of penguins differ markedly in physical characteristics and inbreeding success. Subcolony size is the best studied subcolony characteristic and has been suggested to be an important factor explaining the variation in reproductive success. Small subcolonies generally have lower breeding success, probably because they suffer from worse environmental conditions. It is likely that lower quality individuals also occupy smaller subcolonies, which in turn affects breeding success. However, results are not always consistent, and other subcolony characteristics may mediate breeding success. In the present study, the relationship is investigated between physical subcolony characteristics (slope, isolation and size) and several variables indicative of individual quality and breeding success in the chinstrap penguin Pygoscelis antarctica. Location: The study was performed in the Vapour Col chinstrap penguin colony on Deception Island (South Shetlands Archipelago, 63[infinity]00'S, 60[infinity]40'W) during the austral 2002-03 breeding season. Methods: The slope, the degree of isolation and the size (number of nests) of 22 randomly selected subcolonies were measured. Variables indicating individual quality were considered in 10 nests of each subcolony: parental body size (bill length, bill depth, flipper length), nest size and egg size, and variables indicating breeding success: hatching date and hatching success. Results: Both isolated and sloped subcolonies were smaller in size, and were occupied by male parents with shorter bills and less bill depth respectively. Isolated subcolonies also showed a delayed hatching date and lower hatching success and females of more sloped subcolonies laid smaller eggs. Nest size was larger in isolated subcolonies and smaller in sloped subcolonies. Conclusions: This study indicates that physical characteristics of subcolonies, such as the degree of isolation and slope, rather than just size, affect breeding success of chinstrap penguins. It is also suggested that nest size could be an indicator of individual quality only if it is compared within the same subcolony or if the effect of subcolony is taking into account.

(PDF emailed within 1 workday: $29.90)

Accession: 023706917

Download citation: RISBibTeXText



Related references

First record of a chinstrap penguin Pygoscelis antarctica breeding in Adelie Land, Antarctica. ine Ornithology1995); 22(2): 245-246, 1995

Breeding time, health and immune response in the chinstrap penguin Pygoscelis antarctica. Oecologia (Berlin) 115(3): 313-319, July, 1998

Foraging behaviour of the Chinstrap Penguin Pygoscelis antarctica at Ardley Island, Antarctica. Marine Ornithology 27: 85-95, 1999

A chinstrap penguin Pygoscelis antarctica in Victoria. Australian Bird Watcher, 122: 67, 1987

Vocalizations of the Chinstrap Penguin Pygoscelis antarctica. Colonial Waterbirds 19(1): 101-110, 1996

Diving depths of the chinstrap penguin pygoscelis antarctica. British Antarctic Survey Bulletin (61): 21-26, 1983

Observations on the breeding biology of the chinstrap penguin pygoscelis antarctica at elephant island south shetland islands south atlantic ocean. British Antarctic Survey Bulletin (40): 23-32, 1975

The function of feeding chases in the chinstrap penguin, Pygoscelis antarctica. Animal Behaviour 44(4): 753-759, 1992

Determinants of feeding chases in the Chinstrap Penguin Pygoscelis antarctica. Emu 98(3): 192-196, Sept, 1998

The ecology of protozoa in chinstrap penguin pygoscelis antarctica guano. British Antarctic Survey Bulletin (35): 33-50, 1973

A quantitative analysis of the behavior of the chinstrap penguin pygoscelis antarctica and macaroni penguin eudyptes chrysolophus on bouvetoya south atlantic ocean during the late incubation and early nestling periods. Polar Research 4(1): 33-46, 1986

Recent decrease in chinstrap penguin (Pygoscelis antarctica) populations at two of Admiralty Bay's islets on King George Island, South Shetland Islands, Antarctica. Polar Biology 30(5): 659-661, 2007

Absence of haematozoa in a wild chinstrap penguin Pygoscelis antarctica population. Polar Biology. 18(3): 227-228, 1997

Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica. Journal of Evolutionary Biology 12(3): 507-513, 1999