The Two Phases of Stercorarius parasitieus (Linnæus)

• Published in: Ibis
• Main Author: Southern, H. N.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1943
• Subjects: Fulmar; Pacific; Fulmarus glacialis; North Atlantic; Uria aalge; uria
• Online Access: http://dx.doi.org/10.1111/j.1474-919x.1943.tb03858.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1943.tb03858.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1943.tb03858.x

Summary. The distribution of polymorph ratios in wild populations, and changes or evolution in such distribution, are peculiarly suitable to quantitative treatment. Cases of polymorphism, whether in equilibrium, due to a balance of selective factors, or transient, due to the favouring and spread of...