Side by Side Punta Tombo Argentina is home to the world s

Last updated: 9/20/2023

Side by Side Punta Tombo Argentina is home to the world s largest breeding colony of magellanic penguins Spheniscus magellanicus Researchers have studied this colony since 1983 recording each year how many eggs were laid how many chicks were hatched how many died of various causes and how many successfully left the nest fledged The figure is reproduced from the published findings It gives the relationship between starvation and fledging in the Punta Tombo colony for the 28 years between 1983 and 2010 Percent of chicks fledged 8 10 50 75 Percent of chicks starved There are two outliers on this scatterplot researchers excluded these years from their analysis due to the years highly unusual climatic conditions A quote from the publication is given Starvation strongly affected reproductive success When a higher percentage of chicks starved a lower percentage fledged R 0 70 excluding 1991 and 1999 Macmillan Learning Interpret the quoted value 0 70 in the context of the study O 30 of all eggs successfully fledged The 70 loss was due to starvation 70 of all eggs successfully fledged The 30 loss was due to starvation O 70 of the variation in percent of chicks fledged is accounted for by the linear relationship with percent of chicks starved The other 30 is individual variation amongst penguins that is not explained by the linear relationship 30 of the variation in percent of chicks fledged is accounted for by the linear relationship with percent of chicks starved The other 70 is individual variation amongst penguins that is not explained by the linear relationship