Abundance decline in the narrow‐ridged finless porpoise population off the Pacific coast of eastern Japan

• Published in: Population ecology Vol. 61; no. 3; pp. 325 - 332
• Main Authors: Shirakihara, Kunio, Nakahara, Fumio, Shinohara, Masanori, Shirakihara, Miki, Hiramatsu, Kazuhiko, Irie, Takahiro
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01.07.2019; Blackwell Publishing Ltd
• Subjects: 2011 great East Japan earthquake; Abundance; abundance decline; Aerial surveys; Aquatic mammals; Biological surveys; Coastal ecology; Coasts; Coefficient of variation; Density; distributional gap; Earthquakes; Freshwater mammals; Group size; Habitats; Marine mammals; narrow‐ridged finless porpoise; Population; Population decline; population subdivision; Populations; Porpoises; Regression analysis; Seismic activity; Sendai Bay‐Tokyo Bay; Surveys; Tsunamis; Viability; Japan

The narrow‐ridged finless porpoise Neophocaena asiaeorientalis is a small‐toothed whale with a coastal habitat and is sensitive to human activity. Aerial sighting surveys were conducted in 2012 to evaluate the abundance and distribution of the Sendai Bay‐Tokyo Bay population off the Pacific coast of...