The breeding success (calculated from nest and chick counts) of Gentoo penguins is monitored annually at Bird Island, South Georgia. The number of incubating nests and chicks reaching fledging stage are counted in several Gentoo penguin colonies. Data exist from 1982 onwards. This work was funded by Natural Environment Research Council (UK) core funding to the British Antarctic Survey.

The weights of fledging Gentoo penguin chicks at Bird Island have been monitored since 1989. The colony at Johnson Cove can have over 1000 breeding pairs. Each year, just before their departure from the colony, a sample of 100 fledgling birds are weighed as part of the Bird Island long-term monitoring programme. This data is submitted to the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) as part of their Ecosystem Monitoring Programme (CEMP). This work was funded by Natural Environment Research Council (UK) core funding to the British Antarctic Survey.

The chronology of Gentoo penguins on Bird Island, South Georgia has been monitored since 1988 (no data for 1989-90 or 1990-91). 30 nests are marked in the colony at Square Pond, and 40 in the Johnson Beach colony. Regular checks are made to record when eggs are laid and the peak laying date (when 75% of nests have eggs) is calculated. This work was funded by Natural Environment Research Council (UK) core funding to the British Antarctic Survey.

The weights of fledging Gentoo penguin chicks at Maiviken have been monitored since 2010. The colony at Maiviken, can have over 1000 breeding pairs. Each year, just before their departure from the colony, a sample of 50 fledgling birds are weighed as part of a long-term monitoring programme. These data are submitted to the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) as part of their Ecosystem Monitoring Programme (CEMP). This work was funded by Natural Environment Research Council (UK) core funding to the British Antarctic Survey.

The breeding success (calculated from nest and chick counts) of Gentoo penguins is monitored annually at Maiviken, South Georgia. The number of incubating nests and chicks reaching fledging stage are counted. Data exist from 2010 onwards. This work was funded by Natural Environment Research Council (UK) core funding to the British Antarctic Survey.

Platform Transmitting Terminal (PTT) tags have been used to track Macaroni Penguins (Eudyptes chrysolophus) and Gentoo Penguins (Pygoscelis papua) from Bird Island, South Georgia, since 1998. PTT tags use the ARGOS satellite system to collect geospatial data. These tags are deployed on a project-by-project basis and so data are not available for every year. Tags are generally deployed during the summer season, however, some winter data are available.

The diets of Macaroni Penguin (Eudyptes chrysolophus) and Gentoo Penguin (Pygoscelis papua) have been monitored on Bird Island since 1989. This dataset comprises data on composition of diet samples (Crustaceans, Cephalopod and fish) and measurements of krill carapaces, fish otoliths and squid beaks found in the samples. These measurements are used to estimate the length and weight of krill, fish and squid that have been consumed.

This dataset captures information on the diet composition and mass of gentoo penguin stomach contents at Signy Island, from 1998 to 2010. The monitoring period occurred over four weeks each year and involved sampling adults returning to feed their chicks during the creche period. Sampling took place approximately every five days. Numbers of birds sampled on each occasion varied over the entire period of the dataset from a maximum of eight to a minimum of six, equating to an annual maximum of forty birds and annual minimum of thirty, depending on the year. All adult penguins were sampled on their return to the colony using the stomach lavage methodology specified in CCAMLR CEMP Standard Methods A8A. The stomach samples were then weighed and categorised into krill, cephalopods, fish and non-food and identified to species level where possible. Krill carapaces and otoliths were removed and measured. Ecosystems component of BAS Polar Science for Planet Earth Programme, funded by NERC.

Platform Transmitting Terminal (PTT) tags have been used to track Macaroni Penguins (Eudyptes chrysolophus), Gentoo Penguins (Pygoscelis papua) and King Penguins (Aptenodytes patagonicus) from South Georgia since 2004. PTT tags use the ARGOS satellite system to collect geospatial data. These tags are deployed on a project-by-project basis and so data are not available for every year. Included in the dataset is data from females recorded during long, post-laying foraging periods as well as from fledged birds.