adforage lterpal9899 06jan99 - 16feb99 Adelie Penguin diet studies during the 98-99 season on Torgersen Island. Data files describe general information associated with each sample, the number and weight of minor and major prey categories, the number and size of krill (Euphausia superba) and the number, size and species of fish in each sample. headerxx.dat year.month.day, island, colony number, local time, sample number, penguin weight (g), penguin sex, culmen length (mm), culmen depth (mm), dietxx.dat sample_number total_sample_weight(g) total_euphausia_superba_weight(g) estimated_number_of_euphausia_superba total_thysanoesa_macrura_weight(g) estimated_number_of_thysanoesa_macrura total_fish_weight(g) estimated_number_of_fish go_to_prey_files_for_further_data krillxx.dat sample_number number_of_krill_in_sample number_in_size-class_16-20mm number_in_size-class_21-25mm number_in_size-class_26-30mm number_in_size-class_31-35mm number_in_size-class_36-40mm number_in_size-class_41-45mm number_in_size-class_46-50mm number_in_size-class_51-55mm number_in_size-class_56-60mm number_in_size-class_61-65mm fishxx.dat sample_number sample_source prey_type fish_species_name fish_evidence number_of_fish fish_or_fish_evidence_size_(mm) total_fish_weight_(g) fish_estimated_length_(mm) fish_estimated_weight_(g) preyxx.dat sample_number sample_source prey_type prey_species_name prey_evidence number_of_prey prey_size(mm) prey_weight(g) prey_estimated_length(mm) prey_estimated_weight(g) All variables in which the "estimated" qualifier appears are derived variables. In most cases these fields are not filled because the data depend on, for example, what regression equations are used, hence the choice is specific to each investigator. Note that penguin sex is determined based on culmen size (see CCAMLR 1992). Five breeding adult Adelie penguins feeding chicks were sampled every 5-7 days on Torgersen Island in accordance with the CEMP Standard Methods (CCAMLR 1992) for sampling frequency. Samples were obtained in the field by stomach lavage (CCAMLR 1992) and sorted and identified in the lab within 3 hours. The experimental design is based on the CEMP Standard Methods (CCAMLR 1992) for determining penguin diets. To the degree possible, diet samples are collected after 16:00 local time, which historically corresponds with the arrival of the largest numbers of feeding birds and the presence of fresh prey in the stomachs. Samples taken any earlier in the Palmer area tend to be highly digested and prey less reliably assessed. Antarctica, Adelie penguin, foraging ecology, krill, Euphausia superba, fish. ascii local DBASE online lter ~lter/lterdata/lterpal9899/adforage.98/header98.txt ~lter/lterdata/lterpal9899/adforage.98/diet98.txt ~lter/lterdata/lterpal9899/adforage.98/krill98.txt ~lter/lterdata/lterpal9899/adforage.98/fish98.txt ~lter/lterdata/lterpal9899/adforage.98/prey98.txt William R. Fraser William R. Fraser, bfraser@3rivers.net William R. Fraser Donna L. Patterson Peter Duley Matt Irinaga Same personnel listed above. William R. Fraser Donna L. Patterson William R. Fraser, bfraser@3rivers.net 07jun01 CCAMLR, 1992. Standard Methods for Monitoring Studies. Convention for the Conservation of Antarctic Marine Living Resources Ecosystem Monitoring Program, Hobart, Tasmania, Australia. Fraser, W.R. and D.L. Patterson. 1997. Human disturbance and long-term changes in Adelie Penguin populations: A natural experiment at Palmer Station, Antarctic Peninsula. In, Antarctic Communities: Species, Structure and Survival, B. Battaglia, J. Valencia, and D.W.H. Walton, eds., Cambridge University Press, pp. 445-452. Fraser, W.R., D.L. Patterson, E.J. Holm, J.C. Carlson and P.A. Duley. 1997. U.S. seabird research undertaken as part of the CCAMLR Ecosystem Monitoring Program at Palmer Station 1996-1997. Annual Report, National Marine Fisheries Service, La Jolla, California, USA, 35pp. Loeb, V., V. Siegel, O. Holm-Hansen, R. Hewitt, W. Fraser, W. Trivelpiece and S. Trivelpiece. 1997. Effects of sea-ice extent and krill or salp dominance on the Antarctic food web. Nature 387: 897-900. Kaiser, J. 1997. Is warming trend harming penguins? Science 276: 1790. Emslie, S.D., W.R. Fraser, R.C. Smith and W. Walker. 1997 Abandoned penguin colonies and environmental change in the Palmer Station region, Anvers Island, Antarctic Peninsula. Antarctic Science 10: 257-268. Fraser, W.R., D.L. Patterson, P.A. Duley and M. Irinaga. 1998. U.S. seabird research undertaken as part of the CCAMLR Ecosystem Monitoring Program at Palmer Station 1997-1998. Annual Report, National Marine Fisheries Service, La Jolla, California, USA, 22 pp. Island maps of pal-lter seabird research sites. Key to acronyms and abbreviations used in pal-lter seabird databases. All data are initially recorded in field notebooks. Quality assurance is determined during two subsequent stages. The first is when data are moved from field notebooks to data sheets; the second is when data are moved from data sheets to databases. Core measurments available two years after the season. Citation acknowledgement: "Data from the Palmer LTER data archive were supported by Office of Polar Programs, NSF (OPP-9011927 and OPP-9632763)."

Datafile Form V1.3 for describing a data file.