Главная Главная

CCAMLR

Комиссия по сохранению морских живых ресурсов Антарктики

  • Главная
  • Перейти к контенту сайта
  • Вход
  • Моя учетная запись

Форма поиска

  • Об АНТКОМ
  • Меры по сохранению
  • Наука
  • Промыслы
  • Соблюдение
  • Данные
  • Совещания
  • Публикации
  • English
  • Français
  • Русский
  • Español
  • Главная
  • Совещания
  • WG-EMM-17/P02
Print this page
Increase font size
Decrease font size

Long term variability in the diet and reproductive performance of penguins at Bird Island, South Georgia

Doc Number: WG-EMM-17/P02
Автор(ы): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan
Publication details:
Mar. Biol. (accepted)
Submitted By: Dr Marta Söffker (European Union)
Approved By:
Ms Doro Forck (CCAMLR Secretariat)

Please complete a document request form to access this document

Abstract: 

Inter-annual variability in diet during crèche (December to February) over 22 years (1989 to 2010) was examined for gentoo penguins Pygoscelis papua breeding at Bird Island, South Georgia (54 º0’S, 38º2’W). Overall, diets comprised 51 % crustaceans and 49 % fish by mass. Crustaceans were present in 89 % of samples and were the main prey (> 50 % by mass) in 10 years of the study. Antarctic krill Euphausia superba were present in 85 % of all diet samples. Fish were present in 79 % of samples and were the main prey in 12 years, with Champsocephalus gunnari and Lepidonotothen larseni the most frequently recorded species, in 51 % and 33 % of samples respectively. The energy or mass of krill in the diet was the most reliable predictor of breeding success (the number of chicks fledged per breeding pair); the correlation between model-predicted and observed values was 0.58. We compared annual patterns of gentoo penguin diet variability with those of macaroni penguins Eudyptes chrysolophus breeding at the same location. Our results suggest that the availability of krill is a key source of diet variability for both species, but their diets indicate that gentoo penguins are generalist predators (feeding on pelagic and bentho-pelagic prey), while macaroni penguins are krill specialists (feeding on pelagic prey). Differences in the response to variability in key prey species is an important factor separating the ecological niches of these two sympatric krill predators.

This page was last modified on 26 Jun 2017

Контакты

E-mail: ccamlr [at] ccamlr [dot] org
Телефон: +61 3 6210 1111
Факс: +61 3 6224 8744
Адрес: 181 Macquarie Street, Hobart, 7000, Tasmania, Australia
Почтовый адрес: PO Box 213, North Hobart 7002, Tasmania, Australia

 

Быстрые ссылки

  • Вакансии
  • Список действующих мер по сохранению 2020/21 г.
  • Брошюра АНТКОМ
  • Формы данных АНТКОМ

Footer Links Russian

  • Вход
  • Веб-почта
  • э-группы АНТКОМ
  • Служба поддержки
  • Авторское право
  • Отказ от ответственности и конфиденциальность
  • Карта веб-сайта
© Copyright - the Commission for the Conservation of Antarctic Marine Living Resources 2021, Все права защищены.  |  Наверх  |  Сайт разработан компанией Eighty Options