Mathisen ole a (9 resultados)

Hardcover. Condición: VG+. Hardback in Very Good+ condition without dust jacket. Alaska Sea Grant Report. 4to 11" - 13" tall. 312 pages. Quick shipping, excellent customer service. All books carefully packaged in boxes and ship with tracking information.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condición: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condición: New. Print on Demand. This book provides a detailed account of field studies on Steller sea lions in Alaska between 1956 and 1958. Previous population estimates of the species were unreliable due to their reliance on tagging and recovery methods, but this book presents a novel technique for counting them using aerial photography. The study presents seasonal population estimates for each of the six areas surveyed, along with a minimum population estimate for the entire region from Cape St. Elias to the Islands of the Four Mountains. The book also includes an appendix describing a partial aerial photographic census of harbor seals in Alaska. Ultimately, this book's findings suggest that the greatest density of the Steller sea lion population is located between the entrance of Cook Inlet and Unimak Pass. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…

Paperback. Condición: New. Print on Demand. This book presents a compilation of biological data from red salmon runs in the Nushagak District of Bristol Bay, Alaska, spanning 14 years from 1946 to 1959. The author meticulously collected and analyzed information on catch and escapement, using various sampling methods to ensure accuracy. The data includes statistics on age, sex, length, and seasonal variations, providing a comprehensive understanding of the red salmon population in the region. Additionally, the book explores the relationships between adult escapement and returning runs, as well as the seaward migration of juveniles and the adult population, offering valuable insights into the dynamics of red salmon populations. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…