Study

Supplementary feeding does not increase reproductive success in south polar skuas Catharacta maccormicki on King George Island, Antactica

  • Published source details Ritz M.S., Hahn S. & Peter H.U. (2005) Factors affecting chick growth in the South Polar Skua (Catharacta maccormicki): food supply, weather and hatching date. Polar Biology, 29, 53-60

Actions

This study is summarised as evidence for the following.

Action Category

Provide supplementary food for gulls, terns and skuas to increase reproductive success

Action Link
Bird Conservation
  1. Provide supplementary food for gulls, terns and skuas to increase reproductive success

    A randomised replicated and controlled trial on King George Island, Antarctic Peninsula, in the boreal summer of 2000-1 (Ritz et al. 2005) (as part of the same study as Ritz 2006) found that south polar skua Catharacta maccormicki (also known as Catharacta maccormicki) pairs provided with supplementary food did not raise significantly more chicks than control (unfed) pairs (average of 1.3 chicks/pair for 27 fed pairs vs. 1.5 chicks/pair for 27 controls). Supplementary food consisted of 25 g of fish provided to adults every other day when chicks were 6-35 days old and 100 g of fish when 35-55 days old. This corresponds to approximately 20% of a chick’s daily energy needs.

     

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust