This data set contains a zipped file with 8 individual .csv files used to support the analysis of survival bottlenecks presented by Hinke et al.(2020), "Acute bottlenecks to the survival of juvenile Pygoscelis penguins occur immediately after fledging". Data include geographical position estimates from satellite telemetry studies on Adélie (Pygoscelis adeliae), chinstrap (P. antarctica), and gentoo (P. papua) penguins tracked from the Antarctic peninsula region, carcass counts from ship and beach surveys in the study region, fledgling weights, and battery voltage data from telemetry tags.
Data were collected from several penguin monitoring sites in the Antarctic peninsula region, the South Orkney Islands, and East Antarctica between 1977 and 2017 using traditional and autonomous methods.Traditional methods consisted of researchers conducting direct observations of penguins throughout the season to record information on egg laying, incubation, and brood/guard periods. Simultaneously, autonomous methods consisted of time-lapse cameras deployed at the penguin colonies to photographically record the same daily nesting activities throughout the season. Seabirds observed in this study are Adélie (Pygoscelis adeliae), chinstrap (P. antarctica), and gentoo (P. papua) penguins.
This database contains icthyoplankton data collected as part of the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and other cruises designed to assess the status coastal pelagic species and the California Current ecosystem from 1951 to present. The primary data are eggs and larvae captured in ring or bongo nets (oblique tows), Calvet or paravet nets (vertical tows), and manta nets (surface tows).
Fish captured in trawls by the SWFSC Fisheries Resources Division during surveys for coastal pelagic species. Most tows were targeted for sardine using a Nordic trawl on the surface at night. The database includes identification to various taxonomic levels depending on species, length frequencies, biomass data, and some age data for sardine based on analysis of otoliths.
SWFSC FED Mid Water Trawl Juvenile Rockfish Survey: Station Information and Surface Data.
Surveys have been conducted along the central California coast in May/June
every year since 1983. In 2004 the survey area was expanded to cover the
entire coast from San Diego to Cape Mendocino. The survey samples a series
of fixed trawl stations using a midwater trawl. The midwater trawl survey
gear captures significant numbers of approximately 10 rockfish species during
their pelagic juvenile stage (i.e., 50-150 days old), by which time annual
reproductive success has been established. Catch-per-unit-effort data from
the survey are analyzed and serve as the basis for predicting future
recruitment to rockfish fisheries. Results for several species (e.g.,
bocaccio, chilipepper [S. goodei], and widow rockfish [S. entomelas]) have
shown that the survey data can be useful in predicting year-class strength
in age-based stock assessments.