Success of Pink Salmon Spawning Relative to Size of Spawning Bed Materials (Classic Reprint) - Couverture souple
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Excerpt from Success of Pink Salmon Spawning Relative to Size of Spawning Bed Materials
Permeability of bottom materials is prob ably an important factor limiting fry production in spawning beds. It has been shown how permeability is related to size composition of bottom materials, and it is possible to compare relative permeability of spawning beds by determining average size composi tion. Hence, a simple and direct method of measuring physical properties of spawning beds pertaining directly to their capacity to produce fry has been provided through develop ing techniques for measuring size composi tion of bottom materials. Pronounced differences in size composition of bottom materials were observed among several pink salmon spawning streams. The more productive spawning streams had the highest permeability coefficients.
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Success of Pink Salmon Spawning Relative to Size of Spawning Bed Materials
impression à la demandeVendeur : Forgotten Books, London, Royaume-Uni
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Paperback. Etat : New. Print on Demand. This book examines the relationship between the composition of the riverbed gravels in salmon spawning grounds and the successful hatching of salmon eggs and development of salmon larvae. The author describes methods for measuring the gravel composition, and presents a relationship between the volume of solids less than a certain minimum dimension and the permeability coefficient of stream bottom materials. This permeability is critical to the survival of eggs and larvae. The author compares gravel composition and permeability of spawning grounds that support varying densities of spawning salmon, demonstrating differences between productive and less productive spawning grounds. The author also discusses temporal changes in gravel composition associated with spawning, logging, and flooding. The findings have significant implications for understanding the factors that affect salmon populations and for managing salmon habitats. 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. N° de réf. du vendeur 9781332818761_0
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Success of Pink Salmon Spawning Relative to Size of Spawning Bed Materials Classic Reprint
Vendeur : PBShop.store US, Wood Dale, IL, Etats-Unis
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PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781332818761
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Success of Pink Salmon Spawning Relative to Size of Spawning Bed Materials Classic Reprint
Vendeur : PBShop.store UK, Fairford, GLOS, Royaume-Uni
Évaluation du vendeur 5 sur 5 étoiles
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781332818761
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EUR 23,88
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Expédition depuis Royaume-Uni vers Etats-Unis
Expédition depuis Royaume-Uni vers Etats-Unis
Quantité disponible : 15 disponible(s)