9781334195563 - Variations in the Dissolved Oxygen Content of Intragravel Water in Four Spawning Streams of Southeastern Alaska (Classic Reprint) di Mcneil, William J. (4 risultati)

Condizione: Very Good. 1708601122. 2/22/2024 11:25:22 AM.

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

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

Paperback. Condizione: New. Print on Demand. This book presents the results of field studies investigating dissolved oxygen (DO) levels in spawning areas of pink and chum salmon in various Alaskan streams. The author developed an inexpensive and reliable method for measuring DO levels in intragravel water, using special standpipes inserted into the streambed. The author performed systematic and random sampling to analyze DO variations, identifying significant differences between sample areas and across seasons and years. The research revealed that DO levels in spawning gravels can fluctuate greatly, with the lowest levels observed during periods of low streamflow and warm weather. These low DO levels were associated with higher salmon embryo mortality. The findings highlight the potential importance of environmental factors such as dissolved oxygen on the survival of salmon embryos. 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.