English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Due to major shifts in the marine  ecosystem, many seabirds in the NE Atlantic have  experienced short- and long-term breeding failures  and population changes. One such seabird is  the Atlantic puffin Fratercula arctica, the populations  of which have declined in Norway at an  annual rate of 2% over a ~30 yr period. Parallel to  this decline, we found a significant decline in egg  volume at 2 widely separated Norwegian colonies  situated in different marine ecoregions, a decline  that is unprecedented among auks. In birds, egg  production is costly for the female and varies in  response to the amount of energy available for  reproduction. Whereas proximate factors determining  egg size are largely unknown, food availability  prior to egg-laying is considered important. Using  generalised least-square models, we demonstrate  that the declines in egg size were driven by interannual  changes in abundances of capelin Mallotus  villosus and early life stages of herring Clupea  harengus and haddock Melanogrammus aeglefinus,  all of which are important prey of Atlantic puffins  in these colonies. Furthermore, changes in climatic  variables, such as sea temperature and the North  Atlantic Oscillation, suggest that other prey may  also have played a role in determining puffin egg  size. The decline in egg size may reduce the quality  of future breeders and hence have negative  effects on puffin populations

Long-term decline in egg size of Atlantic puffins Fratercula arctica is related to changes in forage fish stocks and climate conditions