About: http://webisa.webdatacommons.org/264455490

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Due to overfishing, dams, pollution and other factors that are harmful to the species, it has greatly declined in numbers since the beginning of the twentieth century.
http://www.w3.org/ns/prov#wasQuotedFrom	cnrs.fr